Patent · US Expired

Method for making 4,4'-dihydroxydiphenyl ether

US4638099A · kind A · utility

1Cited by

5References

10Claims

0Family size

Assignee

Rohm Co., Ltd. · JP

Inventors

Achim Riemann · Marburg, DE
Werner Ude · Darmstadt, DE

Key dates

Filing date	Jan 23, 1986
Grant date	Jan 20, 1987
Priority date	—
Expiry date	Jan 23, 2006

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C41/22
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A method for making 4,4'-dihydroxydiphenyl ether from diphenyl ether by oxidatively iodinating diphenyl ether to 4,4'-diiododiphenyl ether and/or 4-hydroxy-4'-iododiphenyl ether, hydrolyzing this product with a base, recovering iodine from the solution containing iodide, and recycling the iodine to the iodination step.

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