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公开(公告)号：US3761349A
公开(公告)日：1973-09-25
申请号：US3761349D
申请日：1971-06-03
Applicant: TEXACO INC
Inventor： GARDINER W , COLE E , HESS H
CPC classification number: D21C11/0085 , Y02P40/44 , Y10S423/03
Abstract: DECOKED ALKALINE SULFITE PULP LIQUOR HAVING AN EXCESS OF SOLUBLE SULFITE IS REGENERATED BY TREATING WITH AN ALKALINE EARTH OXIDE AND/OR HYDROXIDE TO PRECIPITATE EXCESS SOLUBLE SULFITE ION AS INSOLUBLE ALKALINE EARTH SULFITE. THE SULFITE PRECIPITATE IS REMOVED BY FILTRATION AND THE RESULTING LIQUOR IS RECYCLED TO THE PULPING OPERATION. THE ALKALINE EARTH OXIDE AND SO2 ARE RECOVERED FROM THE FILTER CAKE BY HEATING.
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