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公开(公告)号:DE2020867A1
公开(公告)日:1971-11-18
申请号:DE2020867
申请日:1970-04-29
Applicant: BASF AG
Inventor: GROSSKINSKY OTTO-ALFRED DR , PILCH KURT DR
IPC: C01B17/94
Abstract: Approx. 70% pure H2SO4 is produced by extracting waste nitrating acid 2 - 6 times with benzene at 10 - 50 degrees C or by subjecting to equiv. counter-current extraction in extractor with 2 - 6 theor. plates; separating benzene phase; exposing acid phase to countercurrent air stream in trickling tower at 40 - 100 degrees C; and treating benzene free acid with 0.1 - 1 wt.% (referred to acid) of 30 - 40 wt.% H2O2. Process is continuous and gives acid suitable for other chemical purposes.
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公开(公告)号:DE1642934A1
公开(公告)日:1971-05-19
申请号:DE1642934
申请日:1967-07-29
Applicant: BASF AG
Inventor: PILCH KURT DR , SPERBER HEINRICH DR
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公开(公告)号:DE1941174A1
公开(公告)日:1971-03-04
申请号:DE1941174
申请日:1969-08-13
Applicant: BASF AG
Inventor: ZIRKER GUENTER DR , SANNE WALTER DR , PILCH KURT DR , SCHULZE GERHARD DR
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公开(公告)号:CH515921A
公开(公告)日:1971-11-30
申请号:CH1437169
申请日:1969-09-23
Applicant: BASF AG
Inventor: FUERST ERNST DR , ADAM KARL DR , HOFFMANN HERWIG DR , PILCH KURT DR , WINDERL SIEGFRIED DR , SANNE WALTER DR
IPC: C07D295/04 , C07D87/24
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公开(公告)号:DE1618174B1
公开(公告)日:1971-04-22
申请号:DE1618174
申请日:1967-06-10
Applicant: BASF AG
Inventor: CORR HUBERT DR , GROSSKINSKY OTTO-ALFRED DR , LOESCH NORBERT DR , PILCH KURT DR
IPC: C07C20060101 , C07C
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公开(公告)号:DE1643704A1
公开(公告)日:1971-04-15
申请号:DE1643704
申请日:1967-12-01
Applicant: BASF AG
Inventor: POEHLER GUENTER DR-ING , WOLF LUDWIG , CORR HUBERT DR , PILCH KURT DR
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