Process for preparation of high purity isobutylene
US4331824A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 1980 |
| Grant date | May 25, 1982 |
| Priority date | — |
| Expiry date | Jul 7, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2531/08
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Highly purified isobutylene, up to 99.9% pure, is obtained by treating a reaction mixture such as that recovered from an isobutylene-containing hydrocarbon mixture also containing an aqueous solution of an aliphatic carboxylic acid having 1 to 6 carbon atoms that has been reacted in an acidic ion exchanger and from which the unreacted hydrocarbons have been removed. The operative ingredients of the treated mixture are tertiary butyl alcohol, secondary butyl alcohol and their esters of the carboxylic acid employed. When treated with an acidic ion exchanger the carboxylic acid is first formed which inhibits the secondary butyl alcohol and secondary butyl ester of the acid from decomposing and high purity isobutylene is recovered therefrom by conventional distillation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.