Process for the recovery of a polyol from an aqueous solution
US6713640B2 · kind B2 · utility
16Cited by
1References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 7, 2003 |
| Grant date | Mar 30, 2004 |
| Priority date | — |
| Expiry date | Jan 7, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/10
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the separation of a polyol or multiple polyols in admixture with other organic compounds, usually those produced with the polyol, is described. The process uses a distillation in a column (11) of a cyclic acetal from an aqueous solution which acetal is formed in a reaction mixture of the polyol and an aldehyde or ketone. The polyols, such as ethylene glycol and propylene glycol, are staple articles of commerce with many uses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.