Partial resolution of pentaerythritol waste liquors
US4105575A · kind A · utility
3Cited by
6References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 12, 1976 |
| Grant date | Aug 8, 1978 |
| Priority date | — |
| Expiry date | Oct 12, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C67/54
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method is disclosed for partially resolving the components of a pentaerythritol waste liquor which contains pentaerythritol, polypentaerythritols, organic syrups, water, and an alkali metal formate which comprises acidifying the waste liquor to convert the alkali metal formate to formic acid and an alkali metal salt, adding a lower aliphatic alcohol to the acidified waste liquor to react with the formic acid to form a formate ester and to precipitate the alkali metal salt, removing the formate ester by distillation, and removing the precipitated alkali metal salt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.