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1.发明授权Method of recovering chemical values from a formate-sodium hydrosulfite reaction mixture 失效从酸性水溶液反应混合物中回收化学值的方法
公开(公告)号：US3718732A
公开(公告)日：1973-02-27
申请号：US3718732D
申请日：1971-01-13
发明人： WINSLOW C , PLENTOVICH J , KISE M
摘要： METHOD OF RECOVERING CHEMICAL VALUES FROM A WASTE EFFLUENT SUCH AS A FORMATE-SODIUM HYDROSULFITE REACTION MEDIUM AFTER REMOVAL OF THE SODIUM HYDROSULFITE. THE METHOD ELIMINATES FROM THE REACTION MEDIUM RESIDUE THOSE REDUCING AGENTS WHICH CREATE A CHEMICAL OXYGEN DEMAND IN ANY BODY OF WATER INTO WHICH THEY MIGHT BE DISCHARGED. THE METHOD INCLUDES: INTRODUCING SULFURIC ACID INTO THE REACTION MEDIUM; BOILING TO EXPEL SULFUR DIOXIDE, CONTINUING BOILING AND DISTILLING WITH REFLUX OF METHYL ALCOHOL AND METHYL FORMATE; FILTERING THE REACTION MEDIUM RESIDUE TO REMOVE SULFUR; AND SEPARATING THE RESIDUE SALT FROM WATER AFTER REMOVING OF SULFUR.
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