Neha Patil (Editor)

Isobutylene

Updated on
Edit
Like
Comment
Share on FacebookTweet on TwitterShare on LinkedInShare on Reddit
Related compounds
  
Boiling point
  
-6.9 °C

Density
  
588 kg/m³

Formula
  
C4H8

Molar mass
  
56.106 g/mol

Appearance
  
Colorless gas

Isobutylene httpsuploadwikimediaorgwikipediacommonsthu

Isobutylene meaning


Isobutylene (or 2-methylpropene) is a hydrocarbon of industrial significance. It is a four-carbon branched alkene (olefin), one of the four isomers of butylene. At standard temperature and pressure it is a colorless flammable gas.

Contents

Uses

Isobutylene Polyisobutylene CAS 9003274 SCBT

Isobutylene is used as an intermediate in the production of a variety of products. It is reacted with methanol and ethanol in the manufacture of the gasoline oxygenates methyl tert-butyl ether (MTBE) and ethyl tert-butyl ether (ETBE), respectively. Alkylation with butane produces isooctane, another fuel additive. Isobutylene is also used in the production of methacrolein. Polymerization of isobutylene produces butyl rubber (polyisobutylene). Antioxidants such as butylated hydroxytoluene (BHT) and butylated hydroxyanisole (BHA) are produced by Friedel-Crafts alkylation of phenols using isobutylene.

Manufacture

Isobutylene Polyisobutylene

Polymer and chemical grade isobutylene is typically obtained by dehydrating tertiary butyl alcohol or catalytic dehydrogenation of isobutane. Gasoline oxygenates MTBE and ETBE are generally produced by reacting methanol or ethanol with isobutylene contained in butene streams from olefin steam crackers or refineries. Isobutylene is not isolated before the reaction as separating the ethers from the remaining butenes is simpler.

Safety

Isobutylene polyisobutylene information and properties

Isobutylene is a highly flammable gas and presents an explosion danger. Usually stored as a compressed, liquefied gas, if released it may produce an oxygen-deficient atmosphere that presents an asphyxiation hazard.

Isobutylene isobutene C4H8 ChemSpider

References

Isobutylene Wikipedia


Similar Topics