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公开(公告)号：YU33181B
公开(公告)日：1976-06-30
申请号：YU237169
申请日：1969-09-19
Applicant: HOECHST AG
Inventor： ERPENBACH H , OHORODNIK A , SENNEWALD K , WOGT W , GLASER H , LECHENICH H
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公开(公告)号：DK514775A
公开(公告)日：1976-05-16
申请号：DK514775
申请日：1975-11-14
Applicant: HOECHST AG
Inventor： BOLLERT U , LOHMAR E , OHORODNIK A
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公开(公告)号：YU237169A
公开(公告)日：1975-12-31
申请号：YU237169
申请日：1969-09-19
Applicant: HOECHST AG
Inventor： SENNEWALD K , JOEST H , OHORODNIK A , GLASER H , VOGT W , ERPENBACH H
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公开(公告)号：SE376723B
公开(公告)日：1975-06-09
申请号：SE1365471
申请日：1971-10-27
Applicant: HOECHST AG
Inventor： OHORODNIK A , SENNEWALD K , HUNDECK J , STUTZKE P
IPC: B01J8/00 , B01J8/18 , B01J8/22 , C07C51/377
Abstract: 1363245 Liquid phase catalytic process, separating solids from liquid KNAPSACK AG 4 Oct 1971 [29 Oct 1970] 46060/71 Headings B1D and B1F In catalyst/liquid separator 7, liquid product is drawn off through valve 11 at a rate such that the upward rate of flow of liquid in separator 7 is less than the rate of sedimentation of catalyst in the separator. Circulation of reaction mixture is effected by the gas-lift effect of gas from line 9 and pump 3. The hydrogenative dehalogenation of dichloracetic acid to produce monochloracetic acid is described using a palladium catalyst on a silica carrier.
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公开(公告)号：NL176232B
公开(公告)日：1984-10-16
申请号：NL7114863
申请日：1971-10-28
Applicant: HOECHST AG
Inventor： OHORODNIK A , SENNEWALD K , HUNDECK J , STUTZKE P
IPC: B01J8/00 , B01J8/18 , B01J8/22 , C07C51/377 , B01J8/08
Abstract: 1363245 Liquid phase catalytic process, separating solids from liquid KNAPSACK AG 4 Oct 1971 [29 Oct 1970] 46060/71 Headings B1D and B1F In catalyst/liquid separator 7, liquid product is drawn off through valve 11 at a rate such that the upward rate of flow of liquid in separator 7 is less than the rate of sedimentation of catalyst in the separator. Circulation of reaction mixture is effected by the gas-lift effect of gas from line 9 and pump 3. The hydrogenative dehalogenation of dichloracetic acid to produce monochloracetic acid is described using a palladium catalyst on a silica carrier.
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Patent Agency Ranking
公开(公告)号：AU518963B2
公开(公告)日：1981-10-29
申请号：AU4080678
申请日：1978-10-18
Applicant: HOECHST AG
Inventor： KAISER K , OHORODNIK A
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公开(公告)号：DK143856B
公开(公告)日：1981-10-19
申请号：DK514775
申请日：1975-11-14
Applicant: HOECHST AG
Inventor： BOLLERT U , LOHMAR E , OHORODNIK A
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公开(公告)号：ZA785855B
公开(公告)日：1979-10-31
申请号：ZA785855
申请日：1978-10-18
Applicant: HOECHST AG
Inventor： KAISER K , OHORODNIK A
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公开(公告)号：ZA7703919B
公开(公告)日：1979-03-28
申请号：ZA7703919
申请日：1977-06-29
Applicant: HOECHST AG
Inventor： GEHRMANN K , STEIL K , OHORODNIK A , SCHAEFER S
CPC classification number: C07F9/52
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公开(公告)号：SE403096B
公开(公告)日：1978-07-31
申请号：SE7602714
申请日：1976-02-27
Applicant: HOECHST AG
Inventor： SCHEFER S , OHORODNIK A , GEHRMANN K , MAINSKI A
Abstract: Dilute sulfuric acid contaminated with acetic acid and hydrogen chloride is purified with the resultant formation of concentrated sulfuric acid and acetic acid. To this end, the contaminated sulfuric acid is heated in a first step to at most 60 DEG C under 25-30 mm Hg so as to expel all of the hydrogen chloride together with minor proportions of acetic acid and water. In a second step, the sulfuric acid is heated to at most 165 DEG C under 20-25 mm Hg so as to distil off the bulk of acetic acid together with water. In a third step, the sulfuric acid is cooled down to 60 DEG -90 DEG C, diluted with 10-30 wieght % of water with agitation and while cooling is continued. Following this, the sulfuric acid is heated to 160 DEG -165 DEG C under 20-25 mm Hg and thereby freed from the water and residual acetic acid.
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