Chromium hydroxide precipitate obtained by a continuous process

Details Chromium hydroxide precipitate obtained by a continuous process Chromium hydroxide precipitate obtained by a continuous process

1983-04-13

1985-12-24

Hruskoci, Peter

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

210724, 210737, 210913, 423 55, C02F 154

Patent

active

045605467

ABSTRACT:
A chromium hydroxide precipitate obtained by 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
patent: 4401573 (1983-08-01), Perrone et al.

Affiliated with

Also associated with

Rating

Chromium hydroxide precipitate obtained by a continuous process does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Chromium hydroxide precipitate obtained by a continuous process , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chromium hydroxide precipitate obtained by a continuous process will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1478423