Method for manufacture of dihydric phenols
US3950437A · kind A · utility
6Cited by
5References
6Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 14, 1973 |
| Grant date | Apr 13, 1976 |
| Priority date | — |
| Expiry date | Dec 14, 1993 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C37/60
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Dihydric phenols are produced preferentially in high yields by having monohydric phenols or phenyl ethers oxidized by an organic peracid using, as a catalyst, at least one member selected from the group consisting of peracid stabilizers, polycarboxylic acids containing N or OH and possessed of a structure from which heavy metal ion-chelating property can theoretically be assumed, magnesium salts, sodium salts and potassium salts thereof, sodium salt, potassium salt and lower alkyl esters of phosphoric acid, and sodium salt and lower alkyl esters of pyrophosphoric acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.