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N-Butene

N-Butene is a general term for four isomers with the chemical formula C4H8. They are mainly colorless gases obtained from crude oil. All four isomers contain four carbon atoms and one double bond....

Release time：2025-04-26

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N-Butene is a general term for four isomers with the chemical formula C4H8. They are mainly colorless gases obtained from crude oil. All four isomers contain four carbon atoms and one double bond.

N-Butene is mainly used to make butadiene, and secondarily to make methyl ethyl ketone, sec-butyl alcohol, butylene oxide, butene polymers and copolymers. Isobutylene is mainly used to make butyl rubber, polyisobutylene rubber and various plastics.

In many cases, 1-butene and 2-butene do not need to be separated, but can be chemically processed together to produce many important organic chemical basic products, such as hydration to sec-butyl alcohol to produce methyl ethyl ketone, oxidative dehydration to butadiene, catalytic oxidation to maleic anhydride and acetic acid. In the polymer chemical industry, 1-butene can be polymerized into poly-1-butene with high temperature creep, wear resistance and stress cracking properties, and copolymerized with ethylene to form linear low-density polyethylene (see polyethylene). The latter is a new type of polymer.

N-Butene is one of the most important basic chemical raw materials. 1-Butene is the raw material for synthesizing sec-butyl alcohol and dehydrating to butadiene; cis-butylene and trans-butylene are used to synthesize C4 and C5 derivatives, cross-linking agents, gasoline, etc. Prepared isobutylene is the raw material for producing butyl rubber and polyisobutylene rubber. It reacts with formaldehyde to produce isoprene, which can be processed into polyisobutylene polymers of different molecular weights and used as lubricant additives, resins, etc.

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