公开(公告)号：US3554895A

公开(公告)日：1971-01-12

申请号：US3554895D

申请日：1969-05-19

Applicant: IONICS

Inventor： MCRAE WAYNE A ,  BROWN DANIEL L ,  MCCRIFF STUART G

IPC: B01D53/14 ,  B01D13/02

CPC classification number: B01D53/1468 ,  B01D53/1481 ,  B01D53/1493

Abstract: THIS IS A CYCLIC PROCESS FOR THE REMOVAL AND RECOVERY OF SULFUR DIOXIDE FROM WASTE STACK GASES TO LESSEN ATMOSPHERIC POLLUTION. THE PROCESS INVOLVES: (A) ELECTROLYTICALLY CONVERTING A SALT SOLUTION INTO AN ACID AND BASE; (B) EMPLOYING THE BASE TO ABSORB THE SULFUR DIOXIDE FROM THE WASTE GAS; (C) NEUTRALIZING THE RESULTING SPENT BASE WITH THE ELECTROLYTICALLY PRODUCED ACID TO REFORM THE ORIGINAL SALT SOLUTION AND TO REALEASE THE ABSORBED SULFUR DIOXIDE GAS, AND

(D) RECYCLING THE SALT SOLUTION TO THE ELECTROLYTIC CELL AND RECOVERING SULFUR DIOXIDE GAS.