Condensation catalyst and catalytical condensation process for organic carboxylic anhydrides
US4981982A · kind A · utility
1Cited by
5References
7Claims
0Family size
Inventors
Key dates
| Filing date | May 23, 1990 |
| Grant date | Jan 1, 1991 |
| Priority date | — |
| Expiry date | May 23, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J37/0009
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A condensation reaction catalyst useful for producing an organic compound, for example, anthraquinone compounds from phthalic dianhydride and optionally benzene, comprises a catalytic principal component consisting of a solid acid substance, for example, compound oxides or zeolite, and an additional basic component consisting of ammonia or a volatile organic base, for example, isopropylamine, n-butylamine, or pyridine, and attached to at least strong acid sites of the solid acid substance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.