Category n-Hexane

The recent price trend chart of food grade n-hexane in the Chinese market, in RMB yuan/ton. • 2023/04/19

Hexane is a solvent used extensively in the food industry for the extraction of various products such as vegetable oils, fats, flavours.

Food grade Hexane is mainly used as a solvent in various kinds of extraction operations. The formula for n- Hexane is CH3(CH2)4CH3. This Kenya Standard specifies requirements and methods of test for hexane, food grade, used as a solvent for extraction of oily /oleaginous materials.

Common Uses For Pharmaceutical Grade Hexane

Pharmaceutical grade hexane is a high purity grade of hexane also referred to as food-grade hexane that is available in purity levels as high as 99% with very minimal impurities.

FG Hexane is produced in the refineries from special cut Naphtha where the Hexane rich stream is extracted and purified to meet the required specification.

Junyuan Petroleum Group is one of the Hexane manufacturers, exporters, producers, and suppliers in China

Hexane is an organic compound, a straight-chain alkane with six carbon atoms, and has the molecular formula C6H14. Hexane is a significant constituent of gasoline. It is a colorless liquid, odorless when pure, and with boiling points of approximately 69 °C (156 °F). It is widely used as a cheap, relatively safe, largely unreactive, and easily evaporated nonpolar solvent.

Hexane is an organic compound with a molecular formula of C6H14. It belongs to linear saturated aliphatic hydrocarbons. It is obtained from crude oil cracking and fractionation. It is a colorless liquid with a faint special odor. It is volatile, almost insoluble in water, and easily soluble in chloroform, ether, and ethanol. Mainly used as a solvent, such as vegetable oil extraction solvent, propylene polymerization solvent, rubber and paint solvent, pigment diluent.

It is used for the extraction of various edible oils such as soybeans, rice bran, cottonseeds, and oils in spices. In addition, the isomerization of n-hexane is one of the important processes for producing high-octane gasoline blending component.

The term hexanes refer to a mixture, composed largely (>60%) of hexane, with varying amounts of the isomeric compounds 2-methyl pentane and 3-methyl pentane, and, possibly, smaller amounts of nonisomeric C5, C6, and C7 (cyclo)alkanes. Hexanes are cheaper than hexane and are often used in large-scale operations not requiring a single isomer (e.g., as cleaning solvent or for chromatography).

Uses

In industry, hexanes are used in the formulation of glues for shoes, leather products, and roofing. They are also used to extract cooking oils (such as canola oil or soy oil) from seeds, for cleansing and degreasing a variety of items, and in textile manufacturing. They are commonly used in food-based soybean oil extraction in the United States, and are potentially present as contaminants in all soy food products in which the technique is used; the lack of regulation by the FDA of this contaminant is a matter of some controversy.

A typical laboratory use of hexanes is to extract oil and grease contaminants from water and soil for analysis. Since hexane cannot be easily deprotonated, it is used in the laboratory for reactions that involve very strong bases, such as the preparation of organolithiums. For example, butyllithiums are typically supplied as a hexane solution.

Hexanes are commonly used in chromatography as a non-polar solvent. Higher alkanes present as impurities in hexanes have similar retention times as the solvent, meaning that fractions containing hexane will also contain these impurities. In preparative chromatography, the concentration of a large volume of hexanes can result in a sample that is appreciably contaminated by alkanes. This may result in a solid compound being obtained as an oil and the alkanes may interfere with the analysis.

Used in solvents, extraction, organic synthesis, cleaning in the electronics industry, as an extractant in the pharmaceutical industry, and also as an extractant for edible vegetable oils.

Mainly used as a solvent, such as vegetable oil extraction solvent, propylene polymerization solvent, rubber and paint solvent, pigment diluent. It is used for the extraction of various edible oils such as soybeans, rice bran, cottonseeds, and other spices. In addition, it is also a high-octane fuel.

Determination of moisture in methanol. UV spectrum analysis. Pesticide residue analysis. High-performance liquid chromatography. Gas chromatographic analysis standard. Biochemical research, protein sequence analysis.

Determine the refractive index of minerals. Organic Synthesis. Replace mercury in thermometers.

Used as analytical reagent and solvent.

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N Hexane, Grade Standard: Technical Grade at CNY 1,0300 /MT.

n-Hexane prices are estimated at USD 1537/MT in March 2023.

The current average market price of Hexane Chemical is Rs 12,000/ Barrel.

n-Hexane is a colorless liquid with a Gasoline-like odor. The commercial product is a mixture of Hexanes and small amounts of other chemicals. n-Hexane is used in laboratories and as a solvent to remove vegetable oils from crops. It is also found in Gasoline and rubber cement.

Virtually all n-hexane is obtained from petroleum mixtures through controlled fractional distillation and other refinery-based processes (Speight 1991). n-Hexane can also be synthesized from sugar cane wastes using special catalysts (SUCRON 1996).

Hexane has a branched structure and n-hexane has an unbranched structure. The results in hexane having a lower boiling point and n-hexane having a higher boiling point when compared to each other.

Normal Hexane is a chemical made from crude oil. Pure Normal Hexane is a colorless liquid with a slightly disagreeable odor. It evaporates very easily into the air and dissolves only slightly in water. Normal Hexane is highly flammable, and its vapors can be explosive.

Pure Normal Hexane is used in laboratories. Most of the Normal Hexane used in industry is mixed with similar chemicals in products known as solvents. Common names for some of these solvents are “commercial hexane,” “mixed hexanes,” “petroleum ether,” and “petroleum naphtha.” An older name for these types of solvents is “petroleum benzene.” Several hundred million pounds of Normal Hexane are produced in the United States each year in the form of these solvents. The major use for solvents containing Normal Hexane is to extract vegetable oils from crops such as soybeans. They are also used as cleaning agents in the printing, textile, furniture, and shoemaking industries. Certain kinds of special glues used in the roofing and the shoe and leather industries also contain Normal Hexane. Several consumer products contain Normal Hexane. For example, gasoline contains about 1–3% Normal Hexane. Normal Hexane is also present in rubber cement.

ISO Code 22K2 foodstuff tank containers.

Dimensions: Length 6,058 millimeters (20 feet), Height 2,591 millimeters (8 feet 6 inches), Width 2,438 millimeters (8 feet).
Tank specifications: Minimum pressure 255 kilopascal (2.65 bar, 38.43 pounds per square inch).

If the customers arrange to rent an ISO tank, what are our requirements for the tank container?

Factory address: No. 117, Guangqing Road, Guangrao County, Dongying, Shandong
Add: No. 117, Guangqing Rd., Guangrao County, Dongying China
ISO tank container requirements: (with emergency shut-off valve and meteorological interface, pressure gauge, super gasket, explosion-proof disc, three kilogram air tightness test, 0.5 pound nitrogen pressure maintaining)
ISO tank requirements: (with emergency shut-off valve and meteorological interface, pressure gauge, super gasket, explosion-proof piece, 3kg air tightness test, 0.5lb nitrogen pressure maintaining)

Friday, 22-JAN-22: There was no change in prices of Pentane, Hexane and Heptane series products today.

For products with small orders, we can provide you with flexitank packaging. The advantages of packaging are as follows: 1. Convenient loading and unloading, door-to-door service, and multimodal transport such as highway, railway and waterway can be adopted. 2. A wide range of suitable chemical varieties. 3. Convenient transshipment, suitable for multimodal transport.

What is a Flexitank?

The Flexitank is a package that is used for the storage and transportation of non-hazardous liquid products and is intended for installation in 20ft ISO shipping containers.

Using Flexitank will reduce packaging, storage and transportation costs by a sizeable margin. This is due to its relatively low unit cost and the convenience of positioning ,speed of loading and efficient exploitation of loading weights.

Very Low positioning costs
No cleaning costs,No disposal costs
Cost effective and considerably cheaper than tank containers,drums and IBC’S
Can carry 40% or more cargo than drum and 50% or more than by bottles
Deliveries are door- to- door • Quick loading compared to drums and IBCs
Low labour for handling,filling and loading
No need for forklift to load or unload container
No need for intermediate bulk storage
Available in remote areas
Clean and environmentally friendly
Low weight of Flexitank-so higher payloads possible
20 ft. Container payload 15% higher than IBCs Container payload 44% higher than drums
No demurrage on Flexitank only on container.No return loads needed

There are two technological methods for extracting edible oil from plants, differentiation oil extraction method and physical oil extraction method, that is, what we usually call leaching method (chemical) and pressing method (physical):
Press method: press method has a long history, and its process is relatively simple: after steaming and frying the oil, squeeze the oil out of the oil by mechanical method. The ancient pressing method requires operators to pay heavy physical labor. The residual oil content in the extruded oil residue (oil cake) is quite high, which wastes extremely valuable oil resources. Modern pressing method has been industrialized and automatic operation, but the problem of high residual oil content in oil residue can not be solved.
From the pretreatment of pressed raw materials, there are cold pressing method and hot pressing method, also known as mature pressing method. Cold pressing means that the raw materials are directly put into the oil press to extrude the oil without baking or steaming. This method has relatively light oil color and brighter color, but the oil yield is low, and the oil taste is not strong and mellow. The purpose of ripe pressing is to dry the oil crops before pressing, so as to reduce the moisture of raw materials and increase the activity and fluidity of oil molecules, so as to improve the oil yield and ensure the flavor of oil quality. But it also destroys the chemical composition of the oil, resulting in a darker and darker color of the oil.
The basic process of oil pressing process is as follows:
1. Conventional production process: raw meal – steaming frying – pressing – machine pressing crude oil
2. Special oil production process: oilseeds – fried seeds – pressing – filtering – scented oil
3. Special oil production process: oilseed – whole seed cold pressing – Filtration – cold pressing oil
Process of oil being squeezed out: when the oil enters the press chamber of the oil press, the pressure increases with the rotation of the press chamber. The seed material is squeezed tightly with the extrusion of oil, and the pressure is generated between the directly contacted pressed particles, resulting in the plastic deformation of the seed material, especially at the oil film rupture and the bonding. In this way, after being extruded and blasted, the pressed material is no longer loose, but forms a plastic body, called oil cake. During pressing, due to the dual action of temperature and pressure, the protein will continue to deteriorate, and then affect the plasticity of the pressing material. In short, the best oil pressing effect can be guaranteed only if the degree of protein denaturation is appropriate.
Leaching method: leaching method is an oil production process. Its theoretical basis is the extraction principle. It originated in France in 1843. It is a safe, hygienic, scientific and advanced oil making process. At present, more than 90% of the total output of oil esters produced by leaching in industrial developed countries. The advantages of oil extraction method are less residual oil, high oil yield, low processing cost, high economic benefit, high quality of meal and good feeding effect in feed industry.
The special solvent oil specially arranged and produced by the state for oil processing can be completely separated from oil and grease with its own composition characteristics. The leaching method is to use the nature of mutual dissolution of oil and organic solvent to crush and press the oil into embryo or expand it, and then contact the oil embryo with organic solvent (generally n-Hexane) in the equipment called extractor to extract and dissolve the oil in the oil. Then, the solvent in the oil is removed by heating and stripping. By this method, the residual oil in the oil residue can be reduced to less than 1%. Taking soybean as an example, the oil yield of leaching method is 50% higher than that of pressing method.
Oil extraction process
(1) According to the operation mode, the leaching process can be divided into intermittent leaching and continuous leaching:
① Batch leaching process operations, such as the embryo entering the extractor, the meal unloading from the extractor, the injection of fresh solvent and the extraction of concentrated mixed oil, are batch, intermittent and periodic. The leaching process belongs to this type of process.
② The process operations of continuous leaching, such as material embryo entering the extractor, meal unloading from the extractor, injection of fresh solvent and extraction of concentrated mixed oil, are all continuous leaching processes, which belong to this type of process.
According to the contact mode, the leaching process can be divided into immersion leaching, spray leaching and mixed leaching:
③ Immersion leaching is called immersion leaching when the material embryo is immersed in solvent to complete the leaching process. The leaching equipment belonging to immersion type includes tank group type, bow type, U-type and Y-type leaching devices, etc.
④ Spray leaching is called spray leaching when the leaching solvent contacts the material embryo in a spray state to complete the leaching process. The leaching equipment of spray type includes crawler extractor, etc.
⑤ Mixed leaching is a leaching method combining spraying and soaking. It belongs to mixed leaching equipment, including horizontal rotating extractor and annular extractor.
(2) The oil extraction process can be divided into direct leaching and pre pressing leaching according to the production method:
① Direct leaching direct leaching is also called “one-time leaching”. It is a process of leaching oil directly after pretreatment. This process is suitable for processing oil with low oil content.
② Pre press leaching the process of extracting some oil from pre press oil, and then leaching the cake with high oil content. This process is suitable for oil with high oil content.
(3) The selection basis and basic process flow of leaching process are closely related to the selected process flow. It directly affects many aspects such as product quality, production cost, production capacity and operating conditions after the oil plant is put into operation. Therefore, both advanced and reasonable process flow should be adopted. The selection of process flow is based on:
① According to the varieties and properties of raw materials, different technological processes are adopted according to different varieties of raw materials, such as processing cottonseed. The technological process is: Cottonseed → cleaning → depilation → shelling → kernel and shell separation → softening → rolling embryo → steaming and frying → pre pressing → leaching;
If rapeseed is processed, the process flow is: Rapeseed → cleaning → rolling embryo → steaming and frying → pre pressing → leaching;
According to the different oil content of raw materials, determine whether to adopt one-time leaching or pre press leaching. As mentioned above, rapeseed and Cottonseed Kernel are high oil-bearing raw materials, so the pre press leaching process should be adopted. The oil content of soybean is low, so the one-time leaching process should be adopted.
Soybean → cleaning → crushing → softening → embryo rolling → drying → leaching;
② According to the requirements for products and by-products, the process conditions should be changed accordingly. For example, when processing soybean, soybean meal is used to extract protein powder, soybean peeling is required to reduce the content of crude fiber and relatively improve the protein content. The process flow is as follows:
Soybean → cleaning → drying → temperature regulation → crushing → peeling → softening → embryo rolling → leaching → leached meal → baking → cooling → crushing → high protein soybean powder
③ Select oil plants with large production capacity according to the production capacity, and select more complex processes and advanced equipment if possible; For oil plants with small production capacity, relatively simple processes and equipment can be selected. For example, for the leaching workshop with a daily treatment capacity of more than 50 tons, paraffin oil tail gas absorption unit and frozen tail gas recovery solvent unit can be considered.
Food science and engineering professionals pointed out that for most oil plants, whether pressed or leached, the crude oil obtained cannot be eaten directly because it contains phospholipids, free fatty acids and pesticide residues. Only after refining processes such as degumming, deacidification, decolorization and distillation deodorization can we get oil for our consumption. Therefore, whether the edible oil is safe or not depends not on whether the pressing or leaching process is adopted for the preparation of the front section, but mainly on the subsequent refining process.
The n-Hexane used in the leaching oil plant must be food grade. After heavy metal removal treatment, the residue of harmful metals such as lead and arsenic is less than 10 ppb (1 / 100 million). Such a low residue will not be harmful to the produced oil.
China’s national standard stipulates that the preparation process must be marked on the outer package of edible oil, which is to give consumers the right to know, which does not mean that the two preparation processes are different in food safety.

Sunflower seed oil production does the following manufacturing processes: cleaning of the seeds, grinding of the seeds, pressing and extraction of crude oil from these seeds and then further refining the oil obtained before packaging. A volatile hydrocarbon like n-Hexane or Isohexane is used as a solvent to extract the oil.

6 Processes of Sunflower Oil Production

Cleaning the Seeds
The harvested sunflower oil seeds are passed over magnets to removal any metal traces, and other impurities are being get rid off by cleaning sieve and destoners.  Then the outer covering (hulls) of the seeds are removed to obtain pure seeds.

Grinding the Seeds
The de-hulled seeds are ground into coarse meal to provide a larger surface area to be pressed. Hammer mills or grooved rollers are used to crush the coarse meal into uniform fine particles. Then the meal is heated to enable oil extraction, though impurities are released with oil during this process and such impurities should be removed before the oil is declared edible.

Pressing
The heated meal is fed into a screw press which progressively increases the pressure from sixty kilopascals (kps) to 950kps, 206kps, to 850kps as the meal is passed through a slotted barrel. At the same time, the oil is squeezed out through the slots in the barrel and recovered.

Extraction of the Additional Oil
Volatile hydrocarbon solvents are used to process the remaining oil cake through solvent extraction so as to achieve maximum yields. The most commonly used solvent is hexane which dissolves the oil out of remaining oil cake. The solvent is then distilled out of the oil, passed through the matter and then collected at the bottom.

Removal of Solvent Traces
Around 90% of the volatile solvent left in the extracted oil, evaporates and it’s collected for reuse. Then a stripping column is used to retrieve the remaining solvent. In this process, the oil is boiled by steam and the solvent evaporates, condenses and is collected separately.

Refining of the Oil
Sunflower oil refining involves removal of the bitterness, color and odor. First the oil is heated at temperatures between 40 0C and 85 0C. Then it’s mixed with an alkaline substance like sodium carbonate or sodium hydroxide. The oils are degummed by treating them with heated water at temperatures between 85 0C and 95 0C or with acidified water. This precipitates out most of the gums usually phosphatides. Then centrifugation is done to remove the dregs.

The edible oil used for cooking is obtained by filtering it through activated carbon, activated clay or through fuller’s earth which adsorbs the pigmented substance from the oil. However, the oil intended for salad dressing needs refrigeration. Such oil is obtained through winterizing by rapidly chilling and filtering to remove waxes. This procedure is applied to prevent solidification of the oil in the refrigerator.

The final step involves deodorizing the oil by passing the steam over hot oil placed in a vacuum at temperatures between 225 0C and 250 0C. This allows the volatile components responsible for the taste and odor to evaporate from the oil. One percent citric acid is added to the oil to inactivate any trace metals present, hence preventing oxidation within the oil, thereby prolonging the shelf life of the oil.

PS: Some smaller plants are only press-plants and do not apply the step of hexane extraction. This results in higher oil content in the meal.

By-product in the Process of Sunflower Oil Production

Sunflower oil seed cake is the most obvious waste product of the sunflower seed oil production process. Such oil seed cake is used to manufacture low-grade fertilizer and produce animal feeds. The unwanted by-products are disposed of.

The most common product of the sunflower seed oil making is the oil seed cake/meal, which is usually used to make animal feed and low-grade fertilizer or partly disposed. Sunflower meal is a successful substitute for soybean meal in equal protein diets for ruminant animals, as well as for swine and poultry feed.

3 Kinds of Sunflower Oil Meal

• Meal produced from undehulled seeds, containing around 28% protein and 25%-28% fiber.
• Meal produced from partially de-hulled seeds, containing 35%-37% protein and 18% fiber;
• Meal produced from seeds with 2-step de-hulling process, containing 40%-42% protein and 12%-14% fiber.

The meal composition thus depends on the efficiency of the de-hulling, and the oil content of sunflower meals ranges from 1.5% to 2.5%, depending on oil extraction efficiency and raw materials. Fresh sunflower meal must be dried for optimal storage. It can be ground, broken into small pieces or pelletized for easy handling and storage by processing under high pressure in an pelletizer or extruder, with an addition of proper binder such as molasses, fats, etc.

Hexane is an organic compound, a straight-chain alkane with six carbon atoms and has the molecular formula C₆H₁₄. Hexane is a significant constituent of gasoline. It is a colorless liquid, odorless when pure, and with boiling points approximately 69 °C. It is widely used as a cheap, relatively safe, largely unreactive, and easily evaporated non-polar solvent.

The market is primarily driven by growing applications of n-hexane in edible oil extraction. It is widely used in the food industry as an oil extraction agent that offers high yield from a variety of seeds. Its usage also assists in removing odor and unwanted taste from the oil, thereby making it a preferred agent for extraction.

Hexane in Solvent extraction method. Hexane in its pure form is a colorless liquid , and its boiling point is between 50℃ – 70℃ all of which work in favor for oil extraction. To begin the process of solvent extraction, oil seeds (soybean, rapeseed etc.) are removed of impurities and dried to reduce moisture content.

What is the difference between hexane and solvent extraction?The oil content in the flakes after removes by solvent extraction method is only 1/2% which is far less when compared to other methods of extraction which may range anywhere between 30- 45%. The Solvent extraction process scores over the other two methods by the following advantages Why hexane for oil extraction and not other solvents?

How do you separate hexane from oil?Oil and solvent are separated by distillation. The hexane process increases oil removal efficiency in a strictly cold-pressed process.

Does oil dissolve in hexane?Gasoline effectively dissolves oils and even grease. Hexane, isolated from other gasoline components, serves as a solvent for vegetable oils, such as peanut oil and soybean oil.

How much Hexane is in cooking oil?It has been estimated that refined vegetable oils extracted with hexane contain approximately 0.8 milligrams of residual hexane per kilogram of oil (0.8 ppm).

Which solvent is best for oil extraction?hexaneGenerally, hexane is the most commonly used solvent for the extraction of oils from plant sources due to its low boiling temperature and easy recovery from the extract, and since most oils are soluble in hexane.

Why hexane is used in oil extraction?Hexane has been widely used for oil extraction because of easy oil recovery, narrow boiling point (63–69 °C) and excellent solubilizing ability. In contrary, while in extraction and recovery processes, hexane is released into the environment that react with the pollutants to form ozone and photo chemicals.

Is hexane used in olive oil extraction? Olive oil extraction is the process of extracting the oil present in olive drupes, known as olive oil. This contrasts with other oils that are extracted with chemical solvents, generally hexane.