Chemistry: physical processes – Physical processes – Crystallization
Patent
1976-01-28
1977-05-03
Wolk, Morris O.
Chemistry: physical processes
Physical processes
Crystallization
B01J 100, C01B 1700
Patent
active
040212025
ABSTRACT:
Method and apparatus for removing sulfur dioxide from stack gases. The stack gases are scrubbed with an aqueous wash liquid containing one or more alkali metal compounds which react to form the bisulfite, sulfite and sulfate salts of the alkali metal. The spent absorbent liquid effluent is then treated with calcium compounds in at least two separate reaction stages, the conditions of ion concentration and pH of the first stage being maintained to favor the precipitation of calcium sulfate in the presence of SO.sub.3.sup.= ions. In the succeeding reaction stages the precipitation of the desired amount of SO.sub.3.sup.= ions is carried out to form calcium sulfite. The resulting compound of calcium with sulfite and sulfate (which may in part be in the form of mixed crystals) are removed and the regenerated liquid is recycled.
REFERENCES:
patent: 1271899 (1918-07-01), Howard
patent: 3775532 (1973-11-01), Shah
patent: 3840638 (1974-10-01), Morita et al.
patent: 3848070 (1974-11-01), Onozuka et al.
patent: 3873532 (1975-03-01), Dahlstrom et al.
Field Edwin L.
Lamantia Charles R.
Lunt Richard R.
Oberholtzer James E.
Valentine James R.
Combustion Equipment Associates Inc.
Lepper Bessie A.
Turk Arnold
Wolk Morris O.
LandOfFree
Apparatus for removing sulfur dioxide from stack gases does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for removing sulfur dioxide from stack gases, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for removing sulfur dioxide from stack gases will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-342839