Trimethylolpropane color improvement
US5603835A · kind A · utility
17Cited by
1References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1994 |
| Grant date | Feb 18, 1997 |
| Priority date | — |
| Expiry date | Jul 21, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C29/86
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
This invention relates to a process for improving the color of trimethylolpropane (TMP) by extracting color-causing impurities generated in the reaction to produce TMP. This improved color TMP is characterized by a reduced acid wash color and phthalic anhydride color--color measurement tests commonly used in the industry for assessing product quality and suitability of the TMP for certain color sensitive end-uses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.