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公开(公告)号：DK143697B
公开(公告)日：1981-09-28
申请号：DK123774
申请日：1974-03-07
Applicant: HOECHST AG
Inventor： RECHMEIER G , MITTLER W , WESSELMANN R
Abstract: Production of vinyl chloride, wherein 1,2-dichloroethane is evaporated under pressure in an evaporation stage and resulting 1,2-dichloroethane in vapor form is thermally cracked at a temperature substantially within the range 450 DEG -650 DEG C with the resultant formation of vinyl chloride.
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公开(公告)号：SE374103B
公开(公告)日：1975-02-24
申请号：SE523270
申请日：1970-04-16
Applicant: HOECHST AG
Inventor： SENNEWALD K , OHORODNIK A , HUNDECK J , MITTLER W , VIERLING H , OPITZ W
Abstract: 1289221 Regenerating dechlorination catalysts KNAPSACK AG 22 April 1970 [24 April 1969] 19327/70 Heading B1E Catalysts containing metallic palladium on an acid-resistant carrier which have been used in the hydrogenative dechlorination of di- and/or tri-chloroacetic acid to give (chloro) acetic acid and which contain moisture in the form of water and/or acetic acid and/or chloroacetic acid are regenerated by treatment with Cl 2 gas in an acid medium at 20-200‹C; expelling residual Cl 2 with an inert gas; and reducing the PdCl 2 to metallic Pd. Prior to oxidation with Cl 2 the catalyst may be washed with water and/or acetic acid and/or chloroacetic acid and partially dried. The acid medium may be a volatile acid such as hydrohalic acetic or chloroacetic acid and the reducing agent may be H 2 , N 2 H 4 , alkali metal formate/formic acid, NaBH 4 or hydroquinone. The acid resistant carrier may be silicic acid.
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公开(公告)号：IN140366B
公开(公告)日：1976-10-23
申请号：IN158CA1974
申请日：1974-01-22
Applicant: HOECHST AG
Inventor： WESSELMANN R , RECHMEIER G , MITTLER W
Abstract: Production of vinyl chloride, wherein 1,2-dichloroethane is evaporated under pressure in an evaporation stage and resulting 1,2-dichloroethane in vapor form is thermally cracked at a temperature substantially within the range 450 DEG -650 DEG C with the resultant formation of vinyl chloride.
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公开(公告)号：NL146483B
公开(公告)日：1975-07-15
申请号：NL7004122
申请日：1970-03-23
Applicant: HOECHST AG
Inventor： SENNEWALD K , OHORODNIK A , MITTLER W , HUNDECK J , HARDEL H-J
IPC: B01J27/00 , B01J31/00 , C07B61/00 , C07C53/16 , C07C51/00 , C07C51/377 , C07C67/00 , C07C51/42 , B01J23/54
Abstract: 1282682 Dehalogenation of haloacids KNAPSACK AG 16 March 1970 [25 March 1969] 12540/70 Heading C2C Monohalocarboxylic acids are prepared from dihalocarboxylic acids, optionally in admixture with trihalocarboxylic acids, by hydrogenation at 60 to 170 C. using a stationary or suspended catalyst comprising a Group VIII metal with an inert carrier, the catalyst being activated by one or more of (a) a non-poisonous metal salt, oxide or hydroxide, and/or (b) an inorganic or organic proton donor. Examples relate to the purification of crude monochloroacetic acid obtained by the chlorination of glacial acetic acid in the presence of acetic anhydride and acetyl chloride, the product containing dichloroacetic acid, trichloroacetic acid and acetic acid. Metal and ammonium activators specified are metals, alkaline earth metals, rare earth metals or metals of Groups 4 or 5, e.g. lithium chloride, sodium acetate, sodium chloride, sodium chloroacetate, sodium carbonate, potassium acetate, potassium chloride, ammonium acetate, ammonium chloride, calcium chloride, aluminium chloride, cerium dioxide, titanium dioxide and vanadium pentoxide. Organic proton-donor activators specified are triethylamine, pyridine, 4-amino-pyridine, piperidine, glycine, urea or triphenyl-phosphine, salts thereof, trichlorosilane, glycocoll, butyraldehyde, di-isobutyl ketone, butyl acetate and cyanoacetic acid. Granular inert carriers of small grain size are advantageous. Specified catalyst-carrier systems are palladium-silica or silicic acid. The process is preferably operated continuously, with recycling of the hydrogenated products and separation of the catalyst therefrom.
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公开(公告)号：NL7500479A
公开(公告)日：1975-04-29
申请号：NL7500479
申请日：1975-01-15
Applicant: HOECHST AG
Inventor： SENNEWALD K , OHORODNIK A , MITTLER W , HUNDECK J , HARDEL H-J
IPC: C07C51/377 , C07C53/16
Abstract: To increase the yield and lifetime of noble-metal (Group VIII) catalysts used for hydrogenating dehalogenation of halogenated carboxylic acids; especially for purification of technical-grade CH2ClCOOH, small quantities (0.001% wt. minimum; maximum depends on solubility or miscibility) of activator (i.e. at least one metal salt or oxide which does not poison the catalyst and is at least partially soluble) and/or organic proton-acceptor (at least partially soluble) and/or organic proton-acceptor (at least partially soluble) are added to the initial mixture. The activator is pref. derived from alkali, alkaline-earth, earth, rare-earth or Sub-Grp. IV or V metals, with CH3COO-, CO32-, Cl-, or OH- anions. Preferred proton acceptors are N-contg. organic bases and salts, P-III cpds., ammoniacal cpds. or cpds. with multiple polar linkages. The activation additives are opt. distilled off and recycled.
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Patent Agency Ranking
公开(公告)号：ZA7400453B
公开(公告)日：1974-12-24
申请号：ZA7400453
申请日：1974-01-22
Applicant: HOECHST AG
Inventor： REICHMEIER G , MITTLER W , WESSELMANN R
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公开(公告)号：DK143697C
公开(公告)日：1982-03-08
申请号：DK123774
申请日：1974-03-07
Applicant: HOECHST AG
Inventor： RECHMEIER G , MITTLER W , WESSELMANN R
Abstract: Production of vinyl chloride, wherein 1,2-dichloroethane is evaporated under pressure in an evaporation stage and resulting 1,2-dichloroethane in vapor form is thermally cracked at a temperature substantially within the range 450 DEG -650 DEG C with the resultant formation of vinyl chloride.
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公开(公告)号：NO132588C
公开(公告)日：1975-12-03
申请号：NO114170
申请日：1970-03-25
Applicant: HOECHST AG
Inventor： SENNEWALD K , OHORODNIK A , MITTLER W , HUNDECK J , HARDEL H-J
Abstract: 1282682 Dehalogenation of haloacids KNAPSACK AG 16 March 1970 [25 March 1969] 12540/70 Heading C2C Monohalocarboxylic acids are prepared from dihalocarboxylic acids, optionally in admixture with trihalocarboxylic acids, by hydrogenation at 60 to 170 C. using a stationary or suspended catalyst comprising a Group VIII metal with an inert carrier, the catalyst being activated by one or more of (a) a non-poisonous metal salt, oxide or hydroxide, and/or (b) an inorganic or organic proton donor. Examples relate to the purification of crude monochloroacetic acid obtained by the chlorination of glacial acetic acid in the presence of acetic anhydride and acetyl chloride, the product containing dichloroacetic acid, trichloroacetic acid and acetic acid. Metal and ammonium activators specified are metals, alkaline earth metals, rare earth metals or metals of Groups 4 or 5, e.g. lithium chloride, sodium acetate, sodium chloride, sodium chloroacetate, sodium carbonate, potassium acetate, potassium chloride, ammonium acetate, ammonium chloride, calcium chloride, aluminium chloride, cerium dioxide, titanium dioxide and vanadium pentoxide. Organic proton-donor activators specified are triethylamine, pyridine, 4-amino-pyridine, piperidine, glycine, urea or triphenyl-phosphine, salts thereof, trichlorosilane, glycocoll, butyraldehyde, di-isobutyl ketone, butyl acetate and cyanoacetic acid. Granular inert carriers of small grain size are advantageous. Specified catalyst-carrier systems are palladium-silica or silicic acid. The process is preferably operated continuously, with recycling of the hydrogenated products and separation of the catalyst therefrom.
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公开(公告)号：DE1915037C3
公开(公告)日：1975-10-30
申请号：DE1915037
申请日：1969-03-25
Applicant: HOECHST AG, 6000 FRANKFURT
Inventor： SENNEWALD K , OHORODNIK A , MITTLER W , HUNDECK J , HARDEL H-J
Abstract: 1282682 Dehalogenation of haloacids KNAPSACK AG 16 March 1970 [25 March 1969] 12540/70 Heading C2C Monohalocarboxylic acids are prepared from dihalocarboxylic acids, optionally in admixture with trihalocarboxylic acids, by hydrogenation at 60 to 170 C. using a stationary or suspended catalyst comprising a Group VIII metal with an inert carrier, the catalyst being activated by one or more of (a) a non-poisonous metal salt, oxide or hydroxide, and/or (b) an inorganic or organic proton donor. Examples relate to the purification of crude monochloroacetic acid obtained by the chlorination of glacial acetic acid in the presence of acetic anhydride and acetyl chloride, the product containing dichloroacetic acid, trichloroacetic acid and acetic acid. Metal and ammonium activators specified are metals, alkaline earth metals, rare earth metals or metals of Groups 4 or 5, e.g. lithium chloride, sodium acetate, sodium chloride, sodium chloroacetate, sodium carbonate, potassium acetate, potassium chloride, ammonium acetate, ammonium chloride, calcium chloride, aluminium chloride, cerium dioxide, titanium dioxide and vanadium pentoxide. Organic proton-donor activators specified are triethylamine, pyridine, 4-amino-pyridine, piperidine, glycine, urea or triphenyl-phosphine, salts thereof, trichlorosilane, glycocoll, butyraldehyde, di-isobutyl ketone, butyl acetate and cyanoacetic acid. Granular inert carriers of small grain size are advantageous. Specified catalyst-carrier systems are palladium-silica or silicic acid. The process is preferably operated continuously, with recycling of the hydrogenated products and separation of the catalyst therefrom.
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公开(公告)号：NO132588B
公开(公告)日：1975-08-25
申请号：NO114170
申请日：1970-03-25
Applicant: HOECHST AG
Inventor： SENNEWALD K , OHORODNIK A , MITTLER W , HUNDECK J , HARDEL H-J
Abstract: 1282682 Dehalogenation of haloacids KNAPSACK AG 16 March 1970 [25 March 1969] 12540/70 Heading C2C Monohalocarboxylic acids are prepared from dihalocarboxylic acids, optionally in admixture with trihalocarboxylic acids, by hydrogenation at 60 to 170 C. using a stationary or suspended catalyst comprising a Group VIII metal with an inert carrier, the catalyst being activated by one or more of (a) a non-poisonous metal salt, oxide or hydroxide, and/or (b) an inorganic or organic proton donor. Examples relate to the purification of crude monochloroacetic acid obtained by the chlorination of glacial acetic acid in the presence of acetic anhydride and acetyl chloride, the product containing dichloroacetic acid, trichloroacetic acid and acetic acid. Metal and ammonium activators specified are metals, alkaline earth metals, rare earth metals or metals of Groups 4 or 5, e.g. lithium chloride, sodium acetate, sodium chloride, sodium chloroacetate, sodium carbonate, potassium acetate, potassium chloride, ammonium acetate, ammonium chloride, calcium chloride, aluminium chloride, cerium dioxide, titanium dioxide and vanadium pentoxide. Organic proton-donor activators specified are triethylamine, pyridine, 4-amino-pyridine, piperidine, glycine, urea or triphenyl-phosphine, salts thereof, trichlorosilane, glycocoll, butyraldehyde, di-isobutyl ketone, butyl acetate and cyanoacetic acid. Granular inert carriers of small grain size are advantageous. Specified catalyst-carrier systems are palladium-silica or silicic acid. The process is preferably operated continuously, with recycling of the hydrogenated products and separation of the catalyst therefrom.
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