Continuous process of removing silica from spent pulping liquors

Details Continuous process of removing silica from spent pulping liquors Continuous process of removing silica from spent pulping liquors

1983-02-28

1985-03-12

Smith, William F.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

With regeneration, reclamation, reuse, recycling or...

162 301, 162 3011, 162 32, 210710, 210769, 210928, 423DIG3, D21C 1104, D21C 500, C02F 160

Patent

active

045043566

ABSTRACT:
A continuous process of removing silica from spent pulping liquors (black liquors) which have been obtained by the alkaline digestion of annual plants. The spent liquor is preconcentrated and contacted with a CO.sub.2 -containing gas. The CO.sub.2 -containing gas is supplied at a rate of 30 to 40 m.sup.3 s.t.p. per m.sup.3 of spent liquor. The precipitated silica is removed from the treated liquor. The silica-containing precipitate which has been separated is diluted and washed with water and causticized by an addition of lime or milk of lime. Solid and liquid phases are separated from each other and the resulting residue is combusted.

REFERENCES:
patent: 4331507 (1982-05-01), Roberts
Chemical Abstracts, vol. 89, 1978, No. 61292.
Institute of Paper Chemistry Abstract Bulletins, vol. 54, 1983, No. 6347; vol. 48, 1978, Nos. 6735 and 9335; vol. 31, 1961, No. 331; vol. 53, 1982, No. 11933.

Affiliated with

Also associated with

Rating

Continuous process of removing silica from spent pulping liquors 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 of removing silica from spent pulping liquors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Continuous process of removing silica from spent pulping liquors will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-706693