Method for the manufacture and purification of methyl tertiary butyl ether and dimethyl ether
US5663454A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 8, 1995 |
| Grant date | Sep 2, 1997 |
| Priority date | — |
| Expiry date | Aug 8, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C41/38
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Methanol and isobutylene are reacted to form a methyl tertiary butyl ether product stream containing contaminating quantities of dimethyl ether, methanol and isobutylene that is separated into a first fraction comprising isobutylene and methyl tertiary butyl ether and a second fraction comprising residual methyl tertiary butyl ether, methanol, dimethyl ether and water. The second fraction is separated into a first lower boiling distillation fraction comprising methyl tertiary butyl ether, methanol, isobutylene, dimethyl ether, and water and a first higher boiling distillation fraction comprising methanol and water. Dimethyl ether and isobutylene are recovered from the first lower boiling distillation fraction and charged to a second distillation column for separation into a second lower boiling distillation fraction consisting essentially of dimethyl ether and a second higher boiling distillation fraction comprising dimethyl ether and isobutylene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.