公开(公告)号：US3829379A

公开(公告)日：1974-08-13

申请号：US22932672

申请日：1972-02-25

申请人： ASAHI CHEMICAL IND

发明人： ISHIDA S ,  OSHIMA N ,  KURITA K ,  SUZUKI I ,  OHNO H

IPC分类号： B01D53/72 ,  C02F1/66 ,  C02C1/40

CPC分类号： C07C45/85 ,  B01D53/72 ,  C02F1/66 ,  Y10S210/911 ,  C07C47/02 ,  C07C47/06 ,  C07C47/22 ,  C07C47/21 ,  C07C47/04

摘要： A GAS OR SOLUTION CONTAINING ALDEHYDES SUCH AS FORMALDEHYDE, IS CONTACTED WITH A SULFITE OF ALKALI METALS OR AMMONIUM OR A MIXTURE OF 100 TO 5% BY WEIGHT OF THE SULFITE AND 0 TO 95% BY WEIGHT OF BISULFATE OF ALKALI METALS OR AMMONIUM, WHILE KEEPING PH OF A TREATING SYSTEM AT 6-

11, AND/OR THE RESULTING SOLUTION CAN BE SUBJECTED TO ACTIVATED SLUDGE TREATMENT.