Patent · US Expired

Process for the manufacture of hydroquinone dimethyl ethers

US4057586A · kind A · utility

2Cited by
1References
7Claims
0Family size

Assignee

Inventor

Key dates

Filing dateOct 21, 1976
Grant dateNov 8, 1977
Priority date—
Expiry dateOct 21, 1996

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC07C2601/16
  • WIPO fieldOrganic fine chemistry
  • WIPO sectorChemistry

Abstract

Hydroquinone dimethyl ethers of the formula ##STR1## wherein R is H, an alkyl group having from 1 to 4 carbon atoms or halogen ARE PREPARED BY CATALYTICAL HYDROGENATION OF BENZOQUINONE TETRAMETHYL DIKETALS OF THE FORMULA ##STR2## wherein R has the same meaning as in formula I at a temperature from about 0.degree. to +150.degree. C. As the starting compounds II may be obtained by anodic oxidation of benzene and the corresponding benzene derivatives in methanol hydroquinone dimethyl ethers I used, for example for the manufacture of dyestuffs, may be obtained in simple manner by using benzene or the corresponding benzene derivative as starting products.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.