Patent · US Expired

Process for the improved working up of effluent

US4287069A · kind A · utility

4Cited by

2References

9Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Artur Reischl · Leverkusen, DE
Kurt Mack · Wuppertal, DE
Friedhelm Sahlmen · Moers, DE

Key dates

Filing date	May 5, 1980
Grant date	Sep 1, 1981
Priority date	—
Expiry date	May 5, 2000

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S210/919
WIPO fieldEnvironmental technology
WIPO sectorChemistry

Abstract

The instant invention is directed to a process for the separation of aqueous sludges in the purification of effluents in purification plants, comprising: PA0 (a) mixing organic and/or inorganic aqueous sludges with ground monomer-free tolylene diisocyanate (TDI) distillation residues having a mean particle size of less than 2 mm; PA0 (b) removing the water from the resulting purified sludges; and PA0 (c) disposing of the purified sludges.

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