Category n-Hexane

The main use of hexane is as a solvent to extract edible oils from seed and vegetable crops (e.g., soybeans, peanuts, corn). (6) Commercial grades of hexane are used as solvents for glues (rubber cement, adhesives), varnishes, and inks. (3,6) Hexane is also used as a cleaning agent (degreaser) in the printing industry.

Hexane is used as the liquid in low temperature thermometers. Rubber cement is an adhesive made from elastic polymers (typically latex) mixed in a solvent such as acetone, hexane, heptane or toluene to keep them fluid enough to be used. Water-based formulas, often stabilised by ammonia, are also available. There are even paper specific rubber cements, used by paper crafters and scrapbookers worldwide!Rubber cement is an opaque liquid that contains pulverized natural or synthetic rubber and a solvent based on hexane or heptane. Grades of rubber cement may contain 70-90% heptane or hexane and 1-15% isopropyl alcohol (isopropanol) or ethyl alcohol . The rubber is received in the form of large blocks or slabs, typically 100 lb (45 kg) in size. Different grades of rubber cement may contain pulverized natural or synthetic rubber in combination with 70 percent to 90 percent heptane or hexane and 1 percent to 15 percent isopropanol or ethanol. Solvent percentage and resultant strength may or may not produce a rubber cement that can dissolve vinyl.

What is the solvent in rubber cement?
Silicone is a typical example. Rubber cement is an opaque liquid that contains pulverized natural or synthetic rubber and a solvent based on hexane or heptane. Grades of rubber cement may contain 70-90% heptane or hexane and 1-15% isopropyl alcohol (isopropanol) or ethyl alcohol (ethanol).

What is rubber adhesive?
Keeping the rubber in a solvent solution allows the rubber to remain fluid enough to be spread and used as an adhesive. These cements are considered drying adhesives, meaning that as the solvents evaporate, the “rubber” portion remains behind, ready to form a strong and flexible bonds.

What is solvent based contact adhesive?
Solvent-based contact adhesive formulations typically consist of a solvent or solvent blend, in which rubber, resin, and additives such as anti-oxidants, fillers etc. are dissolved. 

Can you use toluene solvent to remove cement?
If you are needing to remove cement that is still stuck to your surface with a solvent, you should use the same solvent that your contact cement is suspended in. Like with like. This means if you have a toluene based glue, you could apply toluene solvent to a rag and soak your dried cement to see if you can work it up that way.

The high adhesion properties of SB thermoplastic rubber-based adhesives mean that they often only have to be applied to one of the two substrates to be bonded (single spread).They generally have a high solid content that reduces the amount of adhesive required per unit of bonded surface area and the quantity of solvent emissions.
Chloroprene rubber adhesive is a solution type adhesive among widely-used rubber adhesives. It is made up of neoprene, magnesium oxide, anti-aging agent, antioxidant and filler etc., mixed and then resolved in solvent. Such adhesive has good resistance to water, oil, weak-acid, weak-alkali, aliphatic hydrocarbon and alcohols

What is chloroprene rubber adhesive?
Chloroprene rubber adhesive is a solution type adhesive among widely-used rubber adhesives. It is made up of neoprene, magnesium oxide, anti-aging agent, antioxidant and filler etc., mixed and then resolved in solvent.

Is acetone a good solvent for rubber?
Acetone is a good one on rubber, the other solvents make rubber swell. We clean the rubber gaskets on our dry time wheel with acetone, it is also easier on paint as it is a very fast evaporating solvent. I would not pur it in a bath but use a rag or paper towell.

What is rubber adhesive?
Chloroprene Rubber Adhesive (CR) Chloroprene rubber adhesive is a solution type adhesive among widely-used rubber adhesives. It is made up of neoprene, magnesium oxide, anti-aging agent, antioxidant and filler etc., mixed and then resolved in solvent.

What is rubber adhesive?
Chloroprene Rubber Adhesive (CR) Chloroprene rubber adhesive is a solution type adhesive among widely-used rubber adhesives. It is made up of neoprene, magnesium oxide, anti-aging agent, antioxidant and filler etc., mixed and then resolved in solvent.

What is rubber chemical resistance?
Use this rubber chemical resistance chart to make sure that the elastomer or O-ring seal you choose will be compatible with the particular environment. The chemical compatibility of rubber is extremely important as the rubber can degrade rapidly if the rubber material is not compatible with the environment or media that it comes into contact with.

Hexane
CAS No.: 110-54-3
Hazard Summary
Hexane is used to extract edible oils from seeds and vegetables, as a special-use solvent, and as a cleaning agent. Acute (short-term) inhalation exposure of humans to high levels of hexane causes mild central nervous system (CNS) effects, including dizziness, giddiness, slight nausea, and headache. Chronic (longterm) exposure to hexane in air is associated with polyneuropathy in humans, with numbness in the extremities, muscular weakness, blurred vision, headache, and fatigue observed. Neurotoxic effects have also been exhibited in rats. No information is available on the carcinogenic effects of hexane in humans or animals. EPA has classified hexane as a Group D, not classifiable as to human carcinogenicity.

n-Hexane, CAS Number: 110-54-3

Heptane
Heptane anhydrous, 99% CAS Number 142-82-5. Linear Formula CH 3 (CH 2) 5 CH 3. Molecular Weight 100.20 . Beilstein/REAXYS Number 1730763 . EC Number 205-563-8. MDL number MFCD00009544. PubChem Substance ID 57648092
N-Heptane, is used as a non-polar solvent typically during the plant extraction or crystallization process. N-heptane or normal heptane is a pure single molecule product, which functions better for crystallization due to the tighter control of the chemical properties.
n-Heptane is the straight-chain alkane with the chemical formula H3C(CH2)5CH3 or C7H16. When used as a test fuel component in anti-knock test engines, a 100% heptane fuel is the zero point of the octane rating scale (the 100 point is a 100% iso-octane).
Number of Transactions>200
Total Quantity: (kg)14,177,933 kg
Total Value:(USD)$27,346,608

API Imports and Exports for n-Heptane from India

Exporting Country	Importing Country	Total Quantity (kg)	Average Price (USD/kg)	Number of Transactions
INDIA	SWEDEN	2,720.00	58	<10
INDIA	UNITED KINGDOM	132.50	118	<10
INDIA	IRAN	2,193.50	6	<10
INDIA	BELGIUM	145.00	91	<10
INDIA	UNITED STATES	14.53	742	<10
KOREA,REPUBLIC OF	INDIA	9,660,934.49	2	>200
CHINA	INDIA	2,125,676.78	3	>200
ISRAEL	INDIA	1,492,602.12	1	51 – 200
GERMANY	INDIA	406,983.03	3	51 – 200
UNITED STATES	INDIA	486,531.23	2	51 – 200

Hexane
N-hexane CAS Number: 110-54-3 Molecular formula: C6H14 IUPAC Name: hexane. Hydrocarbons, C6, isoalkanes, 5% n-hexane . Type: legal entity composition of the substance. Constituent 1. Reference substance name: 2,3-dimethylbutane EC Number: 201-193-6 EC Name: 2,3-dimethylbutane CAS Number: 79-29-8 Molecular formula: C6H14
Hexane is a liquid solvent used in industrial, professional and consumer products such as adhesives and coatings. It can also be used in food contact applications such as a solvent for oil seed extraction. One of the most common applications for hexane is its use as a solvent, specifically as an industrial grade degreaser and cleaner.

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. The next step is to crack the seeds for size reduction, they are then flattened to form flakes which increases the surface area to facilitate easier extraction. In the succeeding step food grade hexane is fed as counter current and the solvent extracts oil from the flakes. Then the solvent is evaporated from the oil solvent mixture and from the defatted flakes by exposing them to steam by direct or indirect method. The solvent is condensed to recover back hexane. The oil which is devoid of the solvent undergoes further processing to achieve commercial quality.

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%.

Extraction of oil from seeds is carried out by three method

• Hydraulic press
• Expeller pressing
• Solvent extraction

The Solvent extraction process scores over the other two methods by the following advantages

• Maximum oil recovery
• Lesser working cost
• Cheaper price tags for end users
• Production meets demand
• The extracted oil is low in sedimentation
• Solvent loss is low

Why hexane for oil extraction and not other solvents?

• Hexane has greater ability to extract oil when compared to other solvent like petroleum ether and ethyl acetate.
• With a boiling point of 69℃ it is able to retain its liquid state at all atmospheric conditions other than for extreme climates.
• Its reasonable volatility aids easy removal from solids and oil, using low energy.
• When compared to other solvents hexane records the lowest skin irritation.
• It aggressively mixes with the vegetable oil and washes it out with out disturbing fiber, protein, sugar and undesired gums.
• It is low in odor and does not cause discomfort during exposures.

Hexane considerably scores over all other solvents and is the universally accepted chemical for solvent extraction. The method by itself uses lesser hp and maintenance is also minimal. The process flow is quiet similar with slight variation depending on the seed that’s involved in extraction. Seeds that are subjected solvent extraction process are rape seed, canola, sunflower, safflower, Soybean etc. Pure Chemicals Co. has 36 years of experience in chemical industry and is one of the largest supplier of hexane for all the big names in edible oil extraction industry that follow solvent extraction process.

Number of Transactions>200
Total Quantity: (kg)357,295,003 kg
Total Value: (USD)$418,591,307

API Imports and Exports for n-Hexane from India

Exporting Country	Importing Country	Total Quantity (kg)	Average Price (USD/kg)	Number of Transactions
INDIA	BELGIUM	60,979,259.01	1	11 – 50
INDIA	UNITED STATES	1,038,691.45	14	51 – 200
INDIA	SPAIN	18,585,520.09	1	11 – 50
INDIA	CHINA	742,462.15	15	51 – 200
INDIA	OMAN	5,692,737.00	1	<10
CHINA	INDIA	12,415,563.55	12	>200
ROMANIA	INDIA	87,602,434.00	1	>200
THAILAND	INDIA	64,063,329.08	1	>200
SINGAPORE	INDIA	56,015,830.01	1	>200
United States	INDIA	50,159,176.46	1	>200