Process for the separation of glycols from dimethyl terephthalate
US5391263A · kind A · utility
21Cited by
4References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1994 |
| Grant date | Feb 21, 1995 |
| Priority date | — |
| Expiry date | Jan 26, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C67/54
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Separation of ethylene glycol and diethylene glycol from dimethyl terephthalate is accomplished by distillation using methyl benzoate or the methyl ester of p-toluic acid as an azeotropic agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.