Method of separating sodium hydroxide from white liquor

Details Method of separating sodium hydroxide from white liquor Method of separating sodium hydroxide from white liquor

1994-10-18

1996-04-23

Fortuna, Ana M.

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210649, 162 3011, 162 42, 162 43, B01D 1100

Patent

active

055100350

ABSTRACT:
The present invention relates to a method of processing white liquor (3) obtained from the causticization step of a pulp mill, in which method infeed white liquor (3) principally contains sodium hydroxide (6) and sodium sulfide (7). The method according to the invention is characterized in that the sodium hydroxide (6) contained in the white liquor (3) is separated from the white liquor (3) either entirely or partly by means of a diffusion dialysis membrane process (4). The invention is further characterized in that the sodium hydroxide (6) separated from the white liquor (3) is advantageously entirely returned back to the chemical circulation of the pulp mill.

REFERENCES:
patent: 2302270 (1942-11-01), Skolnik
patent: 3988198 (1976-10-01), Wilson et al.
patent: 4024229 (1977-05-01), Smith et al.
patent: 4093508 (1978-06-01), Henricson
patent: 4519881 (1985-05-01), Chang et al.
patent: 4602982 (1986-07-01), Samuelson
Chemical Abstracts, vol. 104, 1986, Abstract No. 52978.
Chemical Abstracts, vol. 116, 1992, Abstract No. 135712.

Affiliated with

Also associated with

Rating

Method of separating sodium hydroxide from white liquor 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 separating sodium hydroxide from white liquor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of separating sodium hydroxide from white liquor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2306072