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公开(公告)号:JPH05238708A
公开(公告)日:1993-09-17
申请号:JP31740692
申请日:1992-11-26
申请人: HOECHST AG
摘要: Sulphuric acid containing dilute, organic phosphorus compounds and further impurities, which is produced, for example, in the preparation of sulphonated arylphosphines, is purified by extraction with an amine which is sparingly soluble or insoluble in water.
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公开(公告)号:JPH05139708A
公开(公告)日:1993-06-08
申请号:JP13110492
申请日:1992-05-22
申请人: TOPSOE HALDOR AS
发明人: SCHOUBYE PETER
IPC分类号: B01J23/40 , B01J23/22 , B01J27/055 , B01J27/30 , C01B17/50 , C01B17/58 , C01B17/69 , C01B17/76 , C01B17/79 , C01B17/80 , C01B17/90 , C01B17/92
摘要: Process for the regeneration of spent sulphuric acid from chemical processes, which process comprises the steps of evaporating and decomposing the spent sulphuric acid at a temperature of 400-800 DEG C with excess of air, to a gas mainly consisting of carbon dioxide, steam, nitrogen, oxygen, sulphur dioxide and sulphur trioxide together with minor amounts of ammonia, carbon monoxide, residual organic compounds and dust from solids in the spent acid; cooling the gas to 360-450 DEG C and oxidizing oxidizable components in the cooled gas by contact with an oxidation catalyst; cooling the oxidized gas to a temperature of 10-50 DEG C above the sulphuric acid dew point in the gas and condensing sulphuric acid formed in the cooled and oxidized gas.
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公开(公告)号:JPS56158755A
公开(公告)日:1981-12-07
申请号:JP5250481
申请日:1981-04-09
IPC分类号: C01B17/90 , B01D20060101 , C01B17/69 , C01B17/92 , C07C20060101 , C07C67/00 , C07C301/00 , C07C303/14 , C07C303/42 , C07C309/02 , C07C309/03 , C07D333/46
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公开(公告)号:JPH0674121B2
公开(公告)日:1994-09-21
申请号:JP31740692
申请日:1992-11-26
摘要: Sulphuric acid containing dilute, organic phosphorus compounds and further impurities, which is produced, for example, in the preparation of sulphonated arylphosphines, is purified by extraction with an amine which is sparingly soluble or insoluble in water.
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公开(公告)号:JPH0345005B2
公开(公告)日:1991-07-09
申请号:JP17655681
申请日:1981-11-05
申请人: ATOCHEM
发明人: CHAARUSU RABIRON , ANRII RUKUURU
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