Process for liquefying acid anhydride
US4332733A · kind A · utility
2Cited by
3References
14Claims
0Family size
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Key dates
| Filing date | Oct 28, 1980 |
| Grant date | Jun 1, 1982 |
| Priority date | — |
| Expiry date | Oct 28, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C57/13
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A normally solid Diels-Alder reaction product between maleic anhydride and decatriene can be liquefied by heat-treating at from 60.degree. to 250.degree. C. for from 10 minutes to 10 hours in the presence of a compound selected from the following groups (a) to (e): PA1 (a) alkali metal salts; PA1 (b) nitrogen atom-containing organic compounds; PA1 (c) phosphorus atom-containing compounds selected from phosphines and quaternary phosphonium salts; PA1 (d) thiocyanates; and PA1 (e) solid basic compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.