Process for producing high purity isoolefins and dimers thereof by dissociation of ethers

Patent · Tue May 08 00:00:00 EDT 1984

OSTI ID:7261833

Smith, Jr, L A; Jones, Jr, E M; Hearn, D

Alkyl tertiary butyl ether or alkyl tertiary amyl ether is dissociated by vapor phase contact with a cation acidic exchange resin at temperatures in the range of 150 to 250 F at LHSV of 0.1 to 20 to produce a stream consisting of unreacted ether, isobutene or isoamylene and an alcohol corresponding to the alkyl radical. After the alcohol is removed, the ether/isoolefin stream may be fractionated to obtain a high purity isoolefin (99+%) or the ether/isoolefin stream can be contacted in liquid phase with a cation acidic exchange resin to selectively dimerize the isoolefin in a highly exothermic reaction, followed by fractionation of the dimerization product to produce high purity diisoolefin (97+%). In the case where the alkyl is C[sub 3] to C[sub 6] and the corresponding alcohol is produced on dissociation of the ether, combined dissociation-distillation may be carried out such that isoolefin is the overhead product and alcohol the bottom. 2 figs.

• DOE Contract Number: FC07-80CS40454
• Assignee: Chemical Research Licensing Co., Houston, TX (United States)
• Patent Number(s): US 4447668; A
• Application Number: PPN: US 6-496983
• OSTI ID: 7261833
• Resource Relation: Patent File Date: 25 May 1983
• Country of Publication: United States
• Language: English

Related Subjects

10 SYNTHETIC FUELS
2-METHYLPROPENE
FRACTIONATION
ALKENES
SYNTHESIS
ETHERS
DISSOCIATION
ALCOHOLS
DIMERIZATION
ION EXCHANGE MATERIALS
CHEMICAL REACTIONS
HYDROCARBONS
HYDROXY COMPOUNDS
MATERIALS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
POLYMERIZATION
SEPARATION PROCESSES
100200* - Synthetic Fuels- Production- (1990-)