Patent · US Active

Process for working up waste water from nitrobenzene preparation

US9771290B2 · kind B2 · utility

1Cited by

14References

13Claims

0Family size

Assignee

Covestro Deutschland AG · DE

Inventors

Thomas Knauf · Dormagen, DE
Antoni Mairata · Düsseldorf, DE
Erik Sluyts · Brasschaat, BE
Jan Van Tricht · Ekeren, BE

Key dates

Filing date	Apr 15, 2014
Grant date	Sep 26, 2017
Priority date	—
Expiry date	Aug 31, 2034

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC02F2301/066
WIPO fieldEnvironmental technology
WIPO sectorChemistry

Abstract

The present invention provides a process for working up alkaline waste water which is formed during washing of crude nitrobenzene obtained by nitration of benzene, wherein

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