Purification of trimethylolpropane
US3956406A · kind A · utility
5Cited by
3References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 4, 1974 |
| Grant date | May 11, 1976 |
| Priority date | — |
| Expiry date | Oct 4, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C29/86
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Trimethylolpropane prepared in alkali solution by the condensation of n-butyraldehyde and formaldehyde is purified by extraction of the trimethylolpropane from the process effluent with a first solvent and the subsequent addition of a second solvent to the extract to further reduce the content of water and alkali salts. The first solvent may be recovered from the trimethylolpropane containing mixture by a simple distillation. The remaining mixture of trimethylolpropane and the second solvent may be separated by settling and decanting. In a preferred embodiment isobutanol is the first solvent and xylene is the second solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.