Method of removing silicon from waste hydrochloric acid pickling

Details Method of removing silicon from waste hydrochloric acid pickling Method of removing silicon from waste hydrochloric acid pickling

1988-12-20

1991-07-16

Chaudhuri, Olik

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

423DIG1, 210738, C01B 33037

Patent

active

050323695

ABSTRACT:
A method of removing silicon from a waste hydrochloric acid pickling solution is disclosed which comprises stirring the waste solution long enough to form a sludge having a particle size such that the sludge can be separated by a conventional means such as filtration through a filter of at least 0.1 .mu.m in pore diameter, centrifugation or sedimentation. The stirring period can be greatly reduced by adding to the waste pickling solution sludge recovered from an aged waste hydrochloric acid pickling solution or a carbonaceous material such as carbon black having hydrophilic groups on the surface. The sludge is also useful as a filter medium in filtration of the waste pickling solution to remove silicon. The present method can decrease the silicon content to 0.01% or less in terms of converted SiO.sub.2 /Fe.sub.2 O.sub.3 weight ratio.

REFERENCES:
Hackh's Chemical Dictionary, Fourth Edition, Grant ed., p. 133.

Affiliated with

Also associated with

Rating

Method of removing silicon from waste hydrochloric acid pickling does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of removing silicon from waste hydrochloric acid pickling, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of removing silicon from waste hydrochloric acid pickling will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-130077