Butylenes


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Butylenes

 

(also butenes), unsaturated hydrocarbons, C4H8; colorless gases. Three structural isomers of butylene are known: namely, normal α-butylene (1-butene), CH2=CH—CH2—CH3; normal β-butylene (2-butene or pseudobutylene), CH3—CH=CH—CH3, which exists in trans- and cis- forms; and isobutylene, (CH3)2C=CH2. The three isomers have boiling points of -6.25° C, 1.0°-3.72° C, and -6.90° C, respectively.

Butylenes are readily soluble in many organic solvents and poorly soluble in water. They possess all the characteristics of alkenes. Mixtures of air and butylene containing 1.7-9 percent butene are explosive. In industry, butylènes are isolated from the butane-butylene fraction of gases in petroleum refining or are obtained synthetically by the catalytic dehydration of butyl alcohols. Butylenes are used to obtain butadiene, butyl rubber, polyisobutylene (Oppanol), isooctane, lubricating oils, and other products.

References in periodicals archive ?
Supply of butylenes nonetheless should be sufficient to meet demand on a global basis, although some regional markets will not be as well balanced.
For more information on CMAI's 2007 World Butylenes Analysis visit CMAI's website at http://www.
The world's butylenes markets have undergone significant changes during the last 10 years and will continue to evolve in the future.
ExxonMobil's well-proven Alkylation technology combines propylene, butylenes and pentylenes with isobutane to form high value alkylate that is ready for gasoline blending.
Specifically, Raytheon will be responsible for a complex that consists of a fluid catalytic cracker for converting heavy petroleum into lighter products such as liquefied petroleum gas (LPG), propylene, and gasoline; units for sweetening of LPG and gasoline; a plant for producing MTBE (methyl tertiary butyl ether), a product that boosts the octane rating of gasoline; an alkylation unit, which produces high octane gasoline-type material from butylenes and isobutane; and utility systems for the complex.
The company's products include olefins (primarily ethylene, propylene, butadiene, butylenes and specialty products), methanol and MTBE, low- density polyethylene and polypropylene.
Lyondell Petrochemical Company produces a wide variety of petrochemicals, including olefins (primarily ethylene, propylene, butadiene, butylenes and specialty products), methanol, MTBE, and polymers (Alathon[R] high-density polyethylene, polypropylene and low-density polyethylene).