Patent · US Expired

Manufacture of 3,3',5,5'-tetramethyl-2,2'-biphenol

US6077979A · kind A · utility

9Cited by
5References
6Claims
0Family size

Assignee

Inventor

Key dates

Filing dateFeb 18, 1999
Grant dateJun 20, 2000
Priority date—
Expiry dateFeb 18, 2019

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC07C37/11
  • WIPO fieldOrganic fine chemistry
  • WIPO sectorChemistry

Abstract

Coupling in aqueous medium of 2,4-dimethylphenol by persulfate anion or hydrogen peroxide in the presence of iron or iron compounds gives good yields of relatively pure 3,3',5,5'-tetramethyl-2,2'-biphenol.

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