Patent · US Expired

Method for processing mother liquors from the production of bisphenol

US6191316A · kind A · utility

6Cited by

19References

1Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Gerhard Fennhoff · Willich, DE
Hans-Josef Buysch · Krefeld, DE
Gerd Fengler · Krefeld, DE

Key dates

Filing date	Nov 12, 1999
Grant date	Feb 20, 2001
Priority date	—
Expiry date	Nov 12, 2019

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P20/10
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The present invention relates to a process for working up the residual mother liquors from the production of dihydroxydiarylalkanes (bisphenols) discharged from the process once the bisphenol has been separated.

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