Recover butene-1 or -2 easier

Journal Article · Sun Jan 01 04:00:00 EST 1989 · Hydrocarbon Process.; (United States)

OSTI ID:6331565

Emmrich, G; Lackner, K

Extractive distillation of butanes from butenes makes it easier to recover butene-1 and butene-2 as individual products. Large amounts of C/sub 4/ hydrocarbons are produced from steam crackers and catalytic crackers. Some of these C/sub 4/ fractions are isolated for use as chemical raw materials. For example, butadiene can be isolated by extraction. Isobutene can be selectively combined with methanol to make MTBE. To date, only a few plants use the residual C/sub 4/ raffinate (Raffinate 2) as chemical raw materials. Most of the Raffinate 2 has been burned as fuel. Until recently, a great deal of effort and expense were needed to separate butene-1 and butene-2 because their boiling points were very close to other C/sub 4/ fractions. But now there is an extractive distillation process, the Butenex Process, in which a solvent alters the vapor pressures of butanes and butenes, thus facilitating--or at least rendering possible--separation by distillation.

• Research Organization: GKT Gesellschaft fur Kohle-Technologie mbH, Essen (DE)
• OSTI ID: 6331565
• Journal Information: Hydrocarbon Process.; (United States), Journal Name: Hydrocarbon Process.; (United States) Vol. 68:1; ISSN HYPRA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
090121 -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
ALKANES
ALKENES
BUTANE
BUTENES
CATALYTIC CRACKING
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
DISTILLATION
ENERGY SOURCES
FLUID INJECTION
FOSSIL FUELS
FUELS
HYDROCARBONS
INDUSTRIAL PLANTS
ORGANIC COMPOUNDS
PETROLEUM
PETROLEUM FRACTIONS
PETROLEUM REFINERIES
PYROLYSIS
SEPARATION PROCESSES
STEAM INJECTION
SYNTHESIS
THERMOCHEMICAL PROCESSES