Patent · US Expired

Reactive rectification

US7071283B2 · kind B2 · utility

0Cited by

3References

2Claims

0Family size

Assignee

Bayer MaterialScience AG · DE

Inventors

Gerald John · Baytown, US
Edmund Dikow
Christine Mendoza-Frohn · Erkrath, DE
Georg Ronge · Mülheim an der Ruhr, DE
Rolf Bachmann · Busswil, CH
Lutz Gottschalk · Uster, CH
Michael Prein · Brasschaat, BE

Key dates

Filing date	Aug 10, 2001
Grant date	Jul 4, 2006
Priority date	—
Expiry date	Aug 10, 2021

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/24273
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention relates to a method for producing polycarbonate according to the method for the transesterification of molten mass whereby bis-(hydroxyaryl) compounds (bisphenols) and diaryl carbonates are reacted by means of reactive rectification.

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