Process for preparing chlorohydroquinone
US3959392A · kind A · utility
1Cited by
2References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 19, 1974 |
| Grant date | May 25, 1976 |
| Priority date | — |
| Expiry date | Nov 19, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C37/62
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Preparation of chlorohydroquinone by adding hydrogen chloride to p-benzoquinone, wherein a 1 to 20 % by weight solution of p-benzoquinone in benzene is treated discontinuously or continuously with hydrogen chloride at a hydrogen chloride pressure of from 1 to 6 atmospheres gauge, at a temperature of from 40.degree. to 80.degree.C, the residence time being from 1 to 4 hours and the chlorohydroquinone is isolated in known manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.