Continuous process for the removal of chromium from waste waters

Details Continuous process for the removal of chromium from waste waters Continuous process for the removal of chromium from waste waters

1981-05-08

1983-08-30

Hruskoci, Peter A.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210737, 210913, 423 55, C02F 154

Patent

active

044015739

ABSTRACT:
A continuous process is described, wherein chromium-containing waste waters are subjected to continuous hot treatment with acetic acid or with alkaline acetates and alkaline hydroxides at a temperature from 40.degree. C. to boiling point and at atmospheric pressure, at a pH higher than 6.5, preferably between 7 and 10, particularly about 7.5. Thus, a "sandy" type of chromium hydroxide is obtained, having a titer in Cr.sub.2 O.sub.3 of 20 to 40% by weight, which quickly filters, is easily soluble in acids, and thereby affords an easy valorization both as a tanning agent and as a raw material for preparing other chromium compound.

REFERENCES:
patent: 3869386 (1975-03-01), Izdebski
patent: 3950131 (1976-04-01), Young
patent: 3969246 (1976-07-01), Feltz et al.
patent: 4204973 (1980-05-01), Feltz et al.
patent: 4260491 (1981-04-01), Cassidy et al.
patent: 4338200 (1982-07-01), Zeijlstra

Affiliated with

Also associated with

Rating

Continuous process for the removal of chromium from waste waters does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Continuous process for the removal of chromium from waste waters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Continuous process for the removal of chromium from waste waters will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-905107