Recovery of alkylene glycols by azeotropic distillation with 1,2,3-trimethyl benzene
US4021311A · kind A · utility
9Cited by
5References
4Claims
0Family size
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Key dates
| Filing date | Sep 12, 1975 |
| Grant date | May 3, 1977 |
| Priority date | — |
| Expiry date | Sep 12, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C29/82
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Ethylene glycol or 1,2-propylene glycol contained in mixtures with lower carboxylate esters of the glycol is recovered by azeotropic distillation of the mixtures with 1,2,3-trimethyl benzene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.