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1. 发明专利

CA2196917A1 CONTINUOUS PREPARATION OF ALKYL ESTERS OF (METH)ACRYLIC ACID 未知
公开(公告)号：CA2196917A1
公开(公告)日：1997-08-07
申请号：CA2196917
申请日：1997-02-05
申请人： IFFLAND GABRIELE , DAMS ALBRECHT , WECK ALEXANDER , AICHINGER HEINRICH , HERBST HOLGER , NESTLER GERHARD , EXNER HERBERT , SCHMIDT WILLI , GEISENDOERFER MATTHIAS , DOCKNER TONI
发明人： IFFLAND GABRIELE , DAMS ALBRECHT , WECK ALEXANDER , AICHINGER HEINRICH , HERBST HOLGER , NESTLER GERHARD , EXNER HERBERT , SCHMIDT WILLI , GEISENDOERFER MATTHIAS , DOCKNER TONI
IPC分类号： B01J27/02 , B01J31/02 , C07B61/00 , C07C67/08 , C07C67/54 , C07C69/54
摘要： In the process for the continuous preparation of alkyl esters of (meth)acrylic acid by reacting (meth)acrylic acid with monohydric alkanols having from 1 to 8 carbon atoms in the presence of an acid esterification catalyst in a reaction zone, there is discharged from the reaction zone a product mixture which comprises the alkyl (meth)acrylate formed, the catalyst and the by-products formed during the course of the esterification having boiling points higher than that of the alkyl (meth)acrylate, and from which the alkyl (meth)acrylate is separated by distillation in a separation zone. The product mixture discharged from the reaction zone is fed to a rectification unit (I), in this unit the product mixture discharged is separatedby rectification into at least one product (I) comprising the alkyl ester of (meth)acrylic acid and a product (II) comprising the catalyst, the product (I) is fed to a further rectification unit (II) and in this the alkyl ester of (meth)acrylic acid is separated off by rectification.

2. 发明专利

CA2196915A1 CONTINUOUS PREPARATION OF ALKYL ESTERS OF (METH)ACRYLIC ACID 未知
公开(公告)号：CA2196915A1
公开(公告)日：1997-08-07
申请号：CA2196915
申请日：1997-02-05
申请人： DAMS ALBRECHT , AICHINGER HEINRICH , HERBST HOLGER , NESTLER GERHARD , EXNER HERBERT , IFFLAND GABRIELE , WECK ALEXANDER
发明人： DAMS ALBRECHT , AICHINGER HEINRICH , HERBST HOLGER , NESTLER GERHARD , EXNER HERBERT , IFFLAND GABRIELE , WECK ALEXANDER
IPC分类号： B01J27/02 , B01J31/02 , C07B41/12 , C07B61/00 , C07C67/08 , C07C67/54 , C07C69/54
摘要： In a process and an apparatus for the continuous preparation of alkyl esters of (meth)acrylic acid by reacting (meth)acrylic acid with alkanols having from 1 to 5 carbon atoms in a homogeneous, liquid, solvent-free phase at elevated temperature and in the presence of an acid esterification catalyst, in which the (meth)acrylic acid, the alkanol and the catalyst are fed to a reaction zone, the water formed is removed by rectification during a residence time as constituent of a mixture comprising alkanol in a rectification unit superposed on the reaction zone, the distillate thus obtained is separated into an organic phase comprising alkanol and an aqueous phase comprising water, the organic phase is returned to the rectification unit, the reaction mixture is discharged from the reaction zone and conveyed into a distillative separation zone comprising further rectification units and in the latter the alkyl (meth)acrylate formed is separated off. Therein, a) (meth)acrylic acid and an alkanol are reacted in a molar ratio of from 1:0.75 to 1:2, b) the organic phase formed in the rectification unit (III) is essentially completely returned to the rectificationunit III, c) the total amount of the aqueous phase formed in the rectification unit III is essentially removed from the system, d) the reaction mixture discharged from the reaction zone is, with addition of water, fed to a further rectification unit (I) and in this is separated into a product (II) comprising the catalyst and the remaining (meth)acrylic acid and a product (I), comprising the alkyl ester of (meth)acrylic acid, remaining alkanol and water, e) the product (II) formed in the 2. rectification unit (I) is essentially completely returned to the reaction zone, f) the product (I) from the rectification unit (I) is separated into an organic phase comprising the alkyl ester of (meth)acrylic acid and an aqueous phase and g) the organic phase formed in the rectification unit (I) is fed to a further rectification unit (II) and in this the alkyl ester of (meth)acrylic acid is separated from the remaining alkanol and the remaining alkanol is returned to the reaction zone.

3. 发明专利

CA2184197A1 ESTERIFICATION OF (METH)ACRYLIC ACID WITH AN ALKANOL 未知
公开(公告)号：CA2184197A1
公开(公告)日：1997-03-29
申请号：CA2184197
申请日：1996-08-26
申请人： AICHINGER HEINRICH , GEISENDOERFER MATTHIAS , HERBST HOLGER , NESTLER GERHARD
发明人： AICHINGER HEINRICH , GEISENDOERFER MATTHIAS , HERBST HOLGER , NESTLER GERHARD
IPC分类号： C07C27/02 , C07C67/08 , C07C67/327 , C07C67/60 , C07C69/54
摘要： In a process for esterifying (meth)acrylic acid with an alkanol in the presence of an acidic esterification catalyst, in which unconverted starting compounds and the (meth)acrylates to be formed are separated off by distillation and an oxyester-containing bottom product is formed, the bottom product is separated off and is heated in the presence of an acid to 150250.degree.C and the pressure is adjusted so that the cleavage products formed under the abovementioned conditions from the oxyesters contained in the bottom product evaporate directly. The process can be carried out in the presence of molecular oxygen. Mineral acids, for example sulfuric acid or phosphoric acid and/or alkanesulfonic or arylsulfonic acids, for example methanesulfonic acid or p-toluenesulfonic acid, can be added to the bottom product.

4. 发明申请

WO9950221A3 METHOD FOR PRODUCING (METH)ACRYLIC ACID AND (METH)ACRYLIC ACID ESTERS 审中-公开
标题翻译：工艺制备（甲基）丙烯酸和（甲基）丙烯酸酯
公开(公告)号：WO9950221A3
公开(公告)日：1999-12-02
申请号：PCT/EP9901997
申请日：1999-03-24
申请人： BASF AG , AICHINGER HEINRICH , MARTAN HANS , NESTLER GERHARD
发明人： AICHINGER HEINRICH , MARTAN HANS , NESTLER GERHARD
IPC分类号： C07C27/02 , C07C51/44 , C07C51/487 , C07C51/50 , C07C53/10 , C07C57/07 , C07C57/075 , C07C67/08 , C07C69/14 , C07C69/54 , C07C57/04
CPC分类号： C07C51/50 , B01D3/225 , C07C51/44 , C07C51/487 , C07C67/08 , C07C57/04 , C07C69/54
摘要： The invention relates to a method for producing pure (meth)acrylic acid from a crude (meth)acrylic acid, comprising the following steps: A. treating the crude (meth)acrylic acid with at least one compound which is capable of removing aldehyde in order to obtain an aldehyde-free crude (meth)acrylic acid; B. subjecting the aldehyde-free crude (meth)acrylic acid to an imprecise distillation process, which produces a light-boiling fraction containing (meth)acrylic acid and acetic acid and a heavy-boiling fraction containing high boilers; C. separating off a pure (meth)acrylic acid from the heavy-boiling fractions and optionally, D. esterifying the light-boiling fraction containing (meth)acrylic acid and acetic acid obtained in B with one or more alkanols to produce an esterification mixture containing one or more (meth)acrylic acid esters, one or more acetic acid esters and one or more alkanols.
摘要翻译： A：一种用于制备纯的（甲基）丙烯酸从粗（甲基）丙烯酸原料，其包括以下阶段过程处理粗（甲基）丙烯酸与至少一种化合物，其能够醛的除去，其中获得一个无醛的粗（甲基）丙烯酸; B：使所述无醛的粗（甲基）丙烯酸模糊蒸馏，从而获得（甲基）丙烯酸和丙烯酸含有乙酸，低沸点级分和（甲基）和高沸点沸点馏分包括获得; C：从高沸点馏分和任选的d纯（甲基）丙烯酸的分离：在阶段B中获得的产物的丙烯酸酯化（甲基）和含由一个或多个链烷醇的手段低沸点馏分乙酸，由此包括一个或多个的酯化混合物，（甲基）丙烯酸酯，一个或多个乙酸酯和一种或多种链烷醇被获得。

5. 发明专利

CA2184196A1 ESTERIFICATION OF (METH)ACRYLIC ACID WITH AN ALKANOL 未知
公开(公告)号：CA2184196A1
公开(公告)日：1997-03-29
申请号：CA2184196
申请日：1996-08-26
申请人： AICHINGER HEINRICH , FRIED MICHAEL , NESTLER GERHARD
发明人： AICHINGER HEINRICH , FRIED MICHAEL , NESTLER GERHARD
IPC分类号： B01J27/02 , B01J31/02 , C07C27/02 , C07C67/08 , C07C67/327 , C07C67/54 , C07C67/60 , C07C69/54
摘要： In a process for esterifying (meth)acrylic acid with an alkanol in the presence of an esterification catalyst, in which unconverted starting compounds and the (meth)acrylate to be formed are separated off by distillation and an oxyester-containing bottom product is formed, the bottom product is first separated off, the oxyesters contained therein are then separated off by distillation and the resulting distillate is cleaved in the presence of acids atelevated temperatures. The process can be carried out im the presence of molecular oxygen. The distillate is cleaved at from 170 to 250.degree.C, prefera-bly from 180 to 230.degree.C.

6. 发明专利

CA2040981A1 PREPARATION OF PHTHALIC ANHYDRIDE FROM O-XYLENE 未知
公开(公告)号：CA2040981A1
公开(公告)日：1991-10-25
申请号：CA2040981
申请日：1991-04-23
申请人： AICHINGER HEINRICH , RUPPEL WILHELM , SEUBERT ROLF , BOEHNING KARL HEINZ , SCHEIDMEIR WALTER , SCHMIDT JOHANNES E , SCHWARZMANN MATTHIAS
发明人： AICHINGER HEINRICH , RUPPEL WILHELM , SEUBERT ROLF , BOEHNING KARL-HEINZ , SCHEIDMEIR WALTER , SCHMIDT JOHANNES E , SCHWARZMANN MATTHIAS
IPC分类号： B01J23/18 , B01J8/02 , B01J23/22 , B01J27/198 , C07B61/00 , C07C51/265 , C07D307/89
摘要： BASFAKTIENQESELLSCHAFT O.Z.0050/41580 Preparation of phthalic anhydride from o-xylene of the disclosure: Phthalic anhydride is prepared in a multiple tube reactor provided withseparate salt baths, the temperature of the salt bath used for cooling the first layer of catalyst, as regarded in the direction of flow of the reaction mixture, being from 2.degree. to 20.degree.C higher than that of the salt bath(s) associated with the following layer(s).

7. 发明专利

SK279822B6 PROCESS FOR REGENERATING METAL OXIDE CONTAINING CATALYSTS 未知
公开(公告)号：SK279822B6
公开(公告)日：1999-04-13
申请号：SK386692
申请日：1992-12-23
申请人： KARRER LOTHAR , HERZOG KLAUS , AICHINGER HEINRICH , EICHHORN HANS-DIETER , HERRMANN GUENTER
发明人： KARRER LOTHAR , HERZOG KLAUS , AICHINGER HEINRICH , EICHHORN HANS-DIETER , HERRMANN GUENTER
IPC分类号： B01J23/92 , B01J23/84 , B01J23/90 , B01J23/94 , B01J37/00 , B01J38/02 , B01J38/12 , B01J38/60 , C07C45/35
摘要： Process for regenerating metal oxide catalysts having reduced activity, which contain at least one of the elements antimony, iron, bismuth, molybdenum, vanadium, tungsten and/or uranium and a peptisable support, which process comprises the following steps: a) grinding the metal oxide catalyst, water being used at the same time, to a particle size of from 10 nm to 10 um; b) heating the aqueous suspension of the metal oxide catalyst from step a) to a temperature of from 30 to 120 degrees Celsius and adding an acid which peptises the catalyst carrier; c) spray-drying the acidic suspension of the metal oxide catalyst; d) heating the fluidisable metal oxide catalyst particles from step c) to a temperature of from 500 to 850 degrees Celsius.

8. 发明专利

CA2049528A1 THE CATILYTIC DECOMPOSITION OF DINITROGEN MONOXIDE WHICH IS PURE OR PRESENT IN GAS MIXTURES 未知
公开(公告)号：CA2049528A1
公开(公告)日：1992-03-14
申请号：CA2049528
申请日：1991-08-20
申请人： AICHINGER HEINRICH , BOEHNING KARL HEINZ , HERZOG KLAUS , WISTUBA HERMANN , BUERGER GERT , SCHWARZMANN MATTHIAS , HERRMANN GUENTER
发明人： AICHINGER HEINRICH , BOEHNING KARL-HEINZ , HERZOG KLAUS , WISTUBA HERMANN , BUERGER GERT , SCHWARZMANN MATTHIAS , HERRMANN GUENTER
IPC分类号： B01D53/94 , B01D53/86 , B01J23/50 , B01J35/10 , C01B13/02 , C01B21/02
摘要： O.Z. 0050/41875 of the disclosure: A catalyst for decomposing dinitrogen monoxide which is pure or present in gas mixtures comprises metallic silver applied to an alumina carrier with a BET surface area of from 5 to 25 m2/g.

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