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公开(公告)号：DE2626887A1
公开(公告)日：1977-12-22
申请号：DE2626887
申请日：1976-06-16
Applicant: BASF AG
Inventor： KRABETZ RICHARD DIPL CHEM DR , HERRMANN WALTER DIPL ING DR , SCHOLZ NORBERT ING GRAD , ENGELBACH HEINZ DIPL CHEM DR , ENGERT GERD-JUERGEN DIPL CHEM , WILLERSINN CARL-HEINZ DIPL CHE , DUEMBGEN GERD DIPL CHEM DR , THIESSEN FRITZ DIPL CHEM DR
IPC: B01J23/00 , B01J23/24 , B01J23/28 , B01J23/30 , B01J23/31 , B01J23/34 , B01J23/88 , B01J23/89 , B01J37/02 , C07B61/00 , C07C51/00 , C07C51/25 , C07C57/055 , C07C67/00
Abstract: Catalysts which consist of a molded carrier, the surface of which is coated with an active catalyst composition of the general formula Mo12AaBbCcDdOx, where A is V and/or W, B is Cu and/or Fe and/or Mn and/or Ni and/or Cr, C is Nb and/or Ta and/or Bi and/or Sb and/or Sn and/or Th and/or Ce and/or U, D is Li and/or Na and/or K and/or Rb and/or Cs and/or Tl and a is from 0.1 to 18, b is from 0 to 8, c is from 0 to 10, d is from 0 to 2 and x is from 36 to 135, which are particularly active and selective for the oxidation of acrolein and methacrolein with oxygen-containing gases to give acrylic acid and methacrylic acid, respectively, are obtained by first manufacturing the catalyst composition, before applying it to the carrier, from thermally easily decomposed salts of the components by mixing aqueous solutions, slurries or moist solid masses of the salts of the components, drying the mixture and calcining the dried composition at from 140 DEG to 600 DEG C., then milling it to a particle size of less than 150 mu m and thereafter applying it, as a mixture with water, as a layer from 10 to 1,500 mu m thick, to the premolded carrier, which has a rough surface.
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公开(公告)号：DE2436818A1
公开(公告)日：1976-02-19
申请号：DE2436818
申请日：1974-07-31
Applicant: BASF AG
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公开(公告)号：DE3211901A1
公开(公告)日：1983-10-13
申请号：DE3211901
申请日：1982-03-31
Applicant: BASF AG
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公开(公告)号：DE3207208A1
公开(公告)日：1983-09-08
申请号：DE3207208
申请日：1982-02-27
Applicant: BASF AG
Inventor： DANZ ECKEHARD DIPL CHEM DR , DUEMBGEN GERD DIPL CHEM DR , MIESEN ERNEST DIPL ING , SCHMIDT JOHANNES E DIPL CHEM D , WIRTH FRIEDRICH DIPL CHEM DR
IPC: C07D307/60 , C07C51/573 , C07D307/89
Abstract: A process for the continuous isolation of phthalic anhydride and maleic anhydride from the reaction gases obtained by catalytic oxidation of o-xylene or naphthalene with air, wherein the reaction gases are treated with a hydrocarbon of boiling range from 115 DEG to 175 DEG C. as the solvent in a column, and are then treated with an organic solvent of boiling range from 180 DEG to 290 DEG C. in a second column, the phthalic anhydride and maleic anhydride being isolated from the liquid bottom product of the first column.
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公开(公告)号：DE2449780A1
公开(公告)日：1976-04-29
申请号：DE2449780
申请日：1974-10-19
Applicant: BASF AG
Inventor： ENGELBACH HEINZ DIPL CHEM DR , KRABETZ RICHARD DIPL CHEM DR , DUEMBGEN GERD DIPL CHEM DR , WILLERSINN CARL-HEINZ DIPL CHE , FREY WALTER DIPL ING DR , LEBERT ULRICH DIPL CHEM DR , THIESSEN FRITZ DIPL CHEM DR
Abstract: In the oxidation of propylene and/or acrolein, high-boiling or non-volatile byproducts are separated from the solvents used for absorbing the acrylic acid by treating the said solvents laden with byproducts with the hot reaction gases in such amounts that the major portion of the solvents evaporates, the residual solvent containing a high percentage of said byproducts then being discarded or worked up.
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Patent Agency Ranking
公开(公告)号：DE3151805A1
公开(公告)日：1983-07-07
申请号：DE3151805
申请日：1981-12-29
Applicant: BASF AG
Inventor： KRABETZ RICHARD DIPL CHEM DR , DUEMBGEN GERD DIPL CHEM DR , ENGELBACH HEINZ DIPL CHEM DR , WILLERSINN CARL-HEINZ DIPL CHE , ZIRKER GUENTER DIPL CHEM DR
IPC: B01J23/94 , C07C57/055
Abstract: This invention relates to a process for regenerating reprocessing of oxidation catalysts, which contain oxides of molybdenum, tungsten, copper and, if appropriate vanadium, by treatment with ammonia, a carboxylic acid or ammonium salt thereof and, if appropriate, hydrogen peroxide, with dissolution of the catalytically active metal components, evaporation of the water from the solution and heating of the resulting salt residue for activation.
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公开(公告)号：DE2642533A1
公开(公告)日：1978-03-23
申请号：DE2642533
申请日：1976-09-22
Applicant: BASF AG
Inventor： BROECKER FRANZ JOSEF DIPL CHEM , DUEMBGEN GERD DIPL CHEM DR , GLIETENBERG HELMUT DIPL ING DR , MIESEN ERNEST DIPL ING , SCHWARZMANN MATTHIAS DIPL CHEM
IPC: C07D307/33 , C07D315/00 , C07D307/58 , C07D307/60 , C07C55/10
Abstract: gamma -Butyrolactone is manufactured by hydrogenating maleic anhydride in the presence of butyrolactone as the solvent. The hydrogenated reaction mixture, which contains butyrolactone, succinic anhydride and succinic acid, is fractionated in a thin film evaporator.
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公开(公告)号：DE2513405A1
公开(公告)日：1976-10-14
申请号：DE2513405
申请日：1975-03-26
Applicant: BASF AG
Inventor： ENGELBACH HEINZ DIPL CHEM DR , KRABETZ RICHARD DIPL CHEM DR , DUEMBGEN GERD DIPL CHEM DR , LEBERT ULRICH DIPL CHEM DR , THIESSEN FRITZ DIPL CHEM DR , SCHAUER HORST DIPL ING , ENGERT GERD-JUERGEN DIPL CHEM
Abstract: In the novel prepn of acrylic acid by the oxidation of propylene with O2-contg. gases in the presence of two different catalysts placed one behind the other in a tubular reactor, at 200-400 degrees C, cooling the reactor is effected in two separate zones such that (a) the temp. of the cooling medium, in the direction of reaction gas flow in the first zone, where propylene is oxidised to acrolein, is 20-150 degrees C higher than the temp. of the cooling medium in the second zone where the acrolein formed in the presence of the first catalyst, is oxidised in the presence of the other catalyst to acrylic acid, (b) the temp. of the cooling medium within both zones increases only by up to 50 degrees C and (c) the reaction gases before reaching the second catalyst are cooled to the temp. of the second cooling medium in an intermediate space filled with the second reactor. Post-combination of the reaction gases in the first catalyst stage is obviated. Plant requirements are reduced and the process affords good control at optimal acrylic acid yield.
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