Process for recovering dipropylene glycol tert-butyl ethers
US5552024A · kind A · utility
3Cited by
17References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1994 |
| Grant date | Sep 3, 1996 |
| Priority date | — |
| Expiry date | Feb 28, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S203/17
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for making and purifying dipropylene glycol tert-butyl ethers (DPTB). DPTB is made by reacting dipropylene glycol with isobutylene in the presence of an acidic catalyst. Extractive distillation of the product mixture using a glycol extracting agent, preferably dipropylene glycol, allows removal of di-tert-butyl ether impurities as an overhead product. The DPTB product is then distilled to separate it from the glycol extracting agent. High-purity DPTB, substantially free of diethers and exceptionally useful as a solvent, is obtained from the process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.