Category Cyclopentane

The Oigin of Cyclopentane
A colorless, water-insoluble liquid, C5H10, obtained from petroleum and used chiefly as a solvent. Cyclopentane is a flammable liquid and its vapors can be explosive. Cyclopentane has a bond angle of about 108°C. This minimal ring strain for cyclopentane makes it a more stable compound.

Cyclopentane is in the class of cycloalkanes, being alkanes that have one or more carbon rings. It is formed by cracking cyclohexane in the presence of alumina at a high temperature and pressure.

Cyclopentane is a twisted ring in the form of an “envelope” so that one of the carbon atoms is out of the plane of the ring.

Cyclopentane is listed as a High Production Volume (HPV) chemical (65FR81686). Chemicals listed as HPV were produced in or imported into the U.S.

Cyclopentane is formed from pentane and is an alicyclic hydrocarbon compound that falls in the category of an alkane.

Cyclopentane is treated with chlorine in the presence of light or heat to form chloro cyclopentane which then reacts with KOC(CH3)3 forming cyclopentene. Cyclopentane has a bond angle of about 108o. This minimal ring strain for cyclopentane makes it a more stable compound. Besides, this compound occurs as a colourless liquid, and it is flammable. Moreover, it has a petrol-like odour. Cyclopentane is a simple hydrocarbon. If 0.0956 g of the compound is combusted in oxygen, 0.300 g of carbon dioxide and 0.123 g of water are produced.

Boiling point: 49 °C
Melting point: −94 °C
Molecular formula: C5H10
Other names: pentamethylene

Cyclopentane makes important contribution to energy efficiency. Junyuan Petroleum Group is a leading manufacturer of Pentanes in China.

The price of Cyclopentane in the Chinese market today (03.05.2023) is CNY13,000/MT, with a daily increase of CNY500, and the price rises by 4%.

US Dollar to Chinese Yuan Exchange Rate 03.05.2023

US Dollar to Chinese Yuan Exchange Rate is at a current level of 6.910, up from 6.865 the previous market day and up from 6.317 one year ago.

Product Name: Cyclopentane, 95%

CAS: 287-92-3

IUPAC Name: cyclopentane

Molecular Formula:C5H10

InChI Key: RGSFGYAAUTVSQA-UHFFFAOYSA-N

SMILES:C1CCCC1

Molecular Weight (g/mol):70.14

Synonym: cyclopentane pentamethylene zyklopentan ciclopentano hsdb 62

Refractive Index: 1.4030-1.4090 @ 20C

Appearance (Color): Clear colorless

Form: Liquid

Assay (GC): ≥95.0%

Identification (FTIR): Conforms

Description

Cyclopentane is the lightest non-polar cycloalkane solvent used by the chemical industry. Its cyclical structure provides a higher solubility coefficient than branched or linear hydrocarbons, while its low molecular weight results in one of the lowest heat of vaporization values a among non-aromatic hydrocarbon solvents.

Features

• High solubility coefficient

• non polar

• low heat vaporization

Cyclopentane is used as green blowing agent and involved in the production of polyurethane insulating foam, which is used in refrigerators, freezers, water heaters, construction panels, insulated pipes and roofs. As a lubricant, it finds applications in computer hard drives and outer space equipment due to its low volatile nature. It is widely useful in the preparation of resin, adhesives and pharmaceutical intermediate. It is an additive in gasoline. Since it is a halogen free compound and has zero-ozone depletion potential, it replaces the conventionally used chloro fluoro carbon (CFC) in refrigeration and thermal insulation.

Applications

Cyclopentane is used as green blowing agent and involved in the production of polyurethane insulating foam, which is used in refrigerators, freezers, water heaters, construction panels, insulated pipes and roofs. As a lubricant, it finds applications in computer hard drives and outer space equipment due to its low volatile nature. It is widely useful in the preparation of resin, adhesives and pharmaceutical intermediate. It is an additive in gasoline. Since it is a halogen free compound and has zero-ozone depletion potential, it replaces the conventionally used chloro fluoro carbon (CFC) in refrigeration and thermal insulation.

Solubility

Miscible with ethanol, ether and acetone. Slightly miscible with water.

Notes

Avoid heat, direct sunlight, flames and sparks. Incompatible with strong oxidizing agents.

RUO – Research Use Only

Cyclopentane is a cyclic hydrocarbon. It is a component of gasoline and is used in the manufacture of synthetic resins and rubber adhesives, and also as a blowing agent in the manufacture of polyurethane insulating foam. Cyclopentane is a cycloalkane that consists of five carbons each bonded with two hydrogens above and below the plane. The parent of the class of cyclopentanes. It has a role as a non-polar solvent. It is a member of cyclopentanes, a cycloalkane and a volatile organic compound.
Junyuan Petroleum Group is the leading maker of Cyclopentane industry standards in China
Our Cyclopentane production capacity is in the forefront of the industry, accounting for 43% of the industry’s sales.

In the existing production technology, Cyclopentane can be obtained by many methods, but the method of hydrogenation of cyclopentadiene has the most industrial application prospect. The product has been hydrogenated three times, with advanced production technology, stable product indicators, green environmental protection, and special logistics vehicle delivery.
Purchase and Find information on CAS 287-92-3, Cyclopentane which meets or exceeds the grade requirements or specifications for each fine chemical.
Synonyms:
Ciclopentano
Cyclopentadienes
Cyclopentan
Cyclopentanes
Cyclopentene
Pentamethylene
Zyklopentan
Cyclopentane is in the class of cycloalkanes, being alkanes that have one or more rings of carbon atoms. It is formed by cracking cyclohexane in the presence of alumina at a high temperature and pressure.

Cyclopentane is used as a new blowing agent for rigid polyurethane foam. Now it has been widely used in fluorine-free refrigerator, freezer industry, cold storage, pipeline insulation and other fields. In the future, cyclopentane will become the leading role in the field of polyurethane blowing agent. Dongying Liangxin Petrochemical Technology Development Limited Company will tell you about the control points of cyclopentane in the foaming process.

1. Strictly control the physical and chemical properties of stock solution
   The chemical properties of polyisocyanate, combined polyether, foaming agent, catalyst and foam stabilizer in black and white materials directly determine the chemical reaction of polyurethane synthesis and the physical properties of foam. It is the basic condition for producing qualified polyurethane foam.
   Black and white monomers shall be transparent viscous liquid without flocculent insoluble impurities. If there are insoluble impurities, the filter screen of the foaming machine will be blocked, resulting in unstable raw material flow, the ratio of black and white materials does not meet the requirements, and the mixture is uneven. Even the pipeline of the foaming machine is blocked.
   It is recommended to thoroughly clean the black and white material filter screens and needle valves of the foaming machine (and premixer) at least once a week.
2. Strictly control the proportion and injection volume of stock solution
   The proportion of black material, combined polyether and cyclopentane must be strictly controlled. When the total injection volume remains the same, if the proportion of black material is too large, bubbles will appear, if the proportion of white material is too large, soft bubbles will appear, if the proportion of cyclopentane is too large, bubbles will appear, and if the proportion is too small, bubbles will appear. If the proportion of black and white materials is out of balance, the mixture will be uneven and the foam will shrink.
   The injection volume shall be subject to the process requirements. When the injection volume is lower than the process requirement, the foam molding density and strength will be low, and even the filling will not be dense. When the injection volume is higher than the process requirements, bubble expansion and bubble leakage will occur, and the box (door) will be deformed.
3. Strictly control the process temperature and curing time
   Polyurethane foaming is a complex physical and chemical reaction process. The fluctuation of raw material, mold, preheating temperature and curing time will directly affect the foaming quality.
   A. Black material is a kind of active chemical substance, which is easy to react with water. During storage, the container shall be dry and sealed and filled with dry nitrogen for protection. It shall not be in direct contact with water during use. If the storage temperature is lower than 5 ℃, crystallization will occur, so attention must be paid to antifreeze. Once crystallization occurs, it shall be heated and melted at 70~80 ℃ before use, and fully stirred. When the storage temperature is higher than 50 ℃, an insoluble solid will be produced, the viscosity will increase and the chemical properties will change. White materials have the same properties.
   Therefore, black and white materials shall be stored in a ventilated, cool and dry place at room temperature (20~25 ℃) to avoid sun and rain.
   B. The black and white materials shall be subject to constant temperature treatment before foaming, and the foaming temperature shall be controlled at 18~25 ℃.
   When the temperature is too low, the black and white materials have high viscosity, unstable flow, poor fluidity and uneven mixing. When the temperature is too low, the reaction speed of forming foam is slow and the curing time is long. When the curing time is not enough, the box and door are still foaming after demoulding, resulting in appearance deformation.
   When the temperature is too high, the reaction is violent and difficult to control. It is easy to see that the performance of the foam injected into a large box is uneven. The foam injected at the beginning has undergone a chemical reaction, and the viscosity increases rapidly. The foam injected later has not yet reacted. As a result, the foam liquid injected later cannot push the foam liquid injected first to the front of the foaming process of the box, resulting in local cavitation in the box.
   C. The preheating furnace temperature shall be controlled at 30~50 ℃, the foaming furnace temperature shall be controlled at 35~50 ℃, and the foaming mold temperature shall be controlled at 35~45 ℃.
   The temperature of the box and door to be foamed in winter is low, so it must be preheated in the preheating furnace. Otherwise, when the hot polyurethane liquid contacts the box or door body, the chemical reaction will be seriously affected, and the foam liquid will not stick to the shell.
   When the temperature of the foaming mold is too low, the fluidity of the foaming solution system is poor, the curing time is long, the reaction is not complete, and cavitation occurs; When the temperature of the foaming mold is too high, the plastic liner is deformed by heating, and the foam system reacts violently. Therefore, the temperature of the foaming mold and the ambient temperature of the foaming furnace must be strictly controlled.
   Especially in winter, the foaming mold, preheating furnace, foaming furnace, box and door must be preheated for more than 30 minutes every morning when the line is opened. After a period of foaming in summer, the foaming system must be cooled.
   D. The foaming and curing time of black and white materials used by our company must be more than 6 minutes. The curing time is too short, and the box and door are still foaming after demoulding, resulting in appearance deformation. In particular, after the door body is deformed, the door seal gap is large when it is assembled with the box, the cold leakage occurs, the box is not insulated, and the compressor is frequently started.
4. Strictly control the injection pressure of foaming machine at 13~16mpa
   When the injection pressure is unstable, the proportion of black and white materials is unstable and the mixing is insufficient. The injection pressure difference between black and white materials shall be controlled within 5bar, otherwise the foaming machine will be damaged due to material mixing.
   During the foaming process, the injection pressure of the foaming machine shall be checked frequently, and the injection system of the foaming machine shall be cleaned to avoid blocking.
   Black, white and cyclopentane are mixed unevenly, which is manifested by uneven density of polyurethane foam, local large bubbles, cracking of foam and local softening of foam: white, yellow or black stripes appear on foam, and foam shrinks.
5. Preparation before foaming:
   A. Clean and inspect the mold. Before foaming, clean up the missing foam and other debris attached to the foaming mold, and check the mold fitting accuracy. Otherwise, serious quality problems such as damage to the box and bubble leakage will occur during foaming. Before foaming, check whether the exhaust and suction pipes of the box are well arranged as required and whether there are bends. Whether the outgoing line is complete and whether the drainage pipe has been installed. Whether the foaming process board is properly pasted according to the process requirements.
   B. Before door foaming, check whether the handle of the door body is installed correctly and whether it is inclined. Whether the wiring assembly dimension meets the process requirements. Whether the door lock is assembled as required. Whether the masking paper is pasted according to the process requirements and whether there is possibility of bubble leakage.
6. Requirements for taking and placing box (door) body:
   The (door) body shall be handled vertically and gently, and no damage to the inner and outer boxes is allowed; The foamed box (door) shall be placed on the assembly line at uniform intervals. Then check whether the foaming quality meets the requirements. The leaking bubble shall be cleaned with tools, and the box (door) shall not be scratched.
7. Foaming process control method
   1) Before each shift of production, it is necessary to check whether the parameters meet the process requirements. Check again every 3 hours and record the inspection results.
   2) Before each shift of production, the mixing condition and density of free foam must be tested. The mixing condition and density of the molded foam of the box body and the door body shall be tested once a shift. Then the free foam and molded foam were frozen at -20 ℃ for 24h, and their shrinkage was observed. The foam body shall have no obvious shrinkage. And record the inspection results.
   The above are the control points of cyclopentane in the foaming process. I hope it will help you. Please consult us for more questions about cyclopentane!

Cyclopentane used as in the production of polyurethane insulating foam

Synonyms: Pentamethylene , ciclopentano, cyclopentan, zyklopentan, unii-t86pb90rnu, hsdb 62, t86pb90rnu, cyclopentanes, cyclopentyl group, hydrocarbons, cyclic c5 and c6

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

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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.

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Cyclopentane is divided into coal and petroleum production processes, so there are two kinds of raw materials. The petroleum grade feedstock is the by-product cracking C5 and reforming byproduct mixed C5 of ethylene cracking unit, and the coal grade feedstock is the by-product of crude benzol hydrogenation. Although the raw materials are different, there is no significant difference in the quality of cyclopentane, and the downstream application is basically the same, mainly as the foaming agent of rigid polyurethane foam.
At present, nearly half of the domestic enterprises use coal technology, accounting for 45% of the total number of enterprises and 47% of the production capacity. The price rise and fall of non aromatics directly affect the raw material cost of cyclopentane, and then affect the pricing of cyclopentane.
Non aromatic hydrocarbons have risen step by step since August 10, 2020 and have risen to 3,820 yuan / ton so far, up 700 yuan / ton or 22.4% compared with the beginning of the month. The high-end price of cyclopentane stabilized at 9,900 yuan / ton, while the price of low-end channel began to decline step by step since August 12, 2020 and has dropped to 8,700 yuan / ton so far, which is 500 yuan / ton or 5.4% lower than that at the beginning of the month.
Recently, the price of non aromatic hydrocarbons has been rising due to the shortage of on-site goods. However, the cyclopentane market was stable, and some ex factory prices still fell. Why?

CHINESE YUAN RENMINBI EXCHANGE RATES TABLE

Oct 19, 2020 12:26 UTC

1. The price adjustment flexibility of cyclopentane in high-end channels is poor. The pricing cycle of factories and large-scale terminal industries is long, mostly quarterly or annual, so the pace of cyclopentane rising this time is limited.
2. It is difficult for low-end channel to ship goods, and the manufacturer reduces the price to arrange the warehouse. Although the pricing of small and medium-sized terminal industries is flexible, due to the further inspection of safety and environmental protection, some of them shut down for rectification or withdraw from the market, resulting in insufficient demand, weak low-end channel delivery, rising inventory, and part of the price reduction.
   To sum up, cyclopentane market did not rise with raw materials, the price of high-end channel was stable due to the lack of pricing cycle, and the low-end channel was reduced to ship due to insufficient demand.
   Source: Chemical Industry News