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

Abstract

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.degree. to 250.degree. 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.

Inventors:
 [1];  [2];  [3]
  1. (Bellaire, TX)
  2. (Friendswood, TX)
  3. (Houston, TX)
Issue Date:
Research Org.:
CR & L/NEOCHEM JOINT VENTURE
OSTI Identifier:
864996
Patent Number(s):
4447668
Assignee:
Chemical Research & Licensing Company (Houston, TX) IDO
DOE Contract Number:  
FC07-80CS40454
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
process; producing; purity; isoolefins; dimers; dissociation; ethers; alkyl; tertiary; butyl; amyl; dissociated; vapor; phase; contact; cation; acidic; exchange; resin; temperatures; range; 150; degree; 250; lhsv; 20; produce; stream; consisting; unreacted; isobutene; isoamylene; alcohol; corresponding; radical; removed; isoolefin; fractionated; obtain; 99; contacted; liquid; selectively; dimerize; highly; exothermic; reaction; followed; fractionation; dimerization; product; diisoolefin; 97; produced; combined; dissociation-distillation; carried; overhead; bottom; tertiary butyl; exothermic reaction; exchange resin; liquid phase; vapor phase; tertiary amyl; stream consisting; alkyl radical; phase contact; cation acid; alkyl tertiary; /585/999/

Citation Formats

Smith, Jr., Lawrence A., Jones, Jr., Edward M., and Hearn, Dennis. Process for producing high purity isoolefins and dimers thereof by dissociation of ethers. United States: N. p., 1984. Web.
Smith, Jr., Lawrence A., Jones, Jr., Edward M., & Hearn, Dennis. Process for producing high purity isoolefins and dimers thereof by dissociation of ethers. United States.
Smith, Jr., Lawrence A., Jones, Jr., Edward M., and Hearn, Dennis. Sun . "Process for producing high purity isoolefins and dimers thereof by dissociation of ethers". United States. https://www.osti.gov/servlets/purl/864996.
@article{osti_864996,
title = {Process for producing high purity isoolefins and dimers thereof by dissociation of ethers},
author = {Smith, Jr., Lawrence A. and Jones, Jr., Edward M. and Hearn, Dennis},
abstractNote = {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.degree. to 250.degree. 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1984},
month = {1}
}

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