公开(公告)号：ES2183055T3

公开(公告)日：2003-03-16

申请号：ES97111738

申请日：1997-07-10

Applicant: DEGUSSA

Inventor： SAUER JORG DR ,  VON HIPPEL LUKAS DR ,  ARNTZ DIETRICH DR ,  BOCK WOLFGANG DR

IPC: B01J23/04 ,  B01J23/30 ,  B01J37/02 ,  C07B61/00 ,  C07C319/00 ,  C07C319/08 ,  C07C321/04

Abstract: In an aluminium oxide (I) catalyst for the synthesis of methyl mercaptan containing 5-25 wt.% potassium tungstate (II) as promoter with respect to active (I), (II) is deposited in 2 portions. (I) is first coated with the first portion of (II) by impregnation in excess aqueous solution, then dried at elevated temperature. Then the second portion is applied by pore volume impregnation. The catalyst precursor is then dried at elevated temperature and calcined at 200-600 degrees C.

公开(公告)号：ES2185678T3

公开(公告)日：2003-05-01

申请号：ES95113232

申请日：1995-08-23

Applicant: DEGUSSA

Inventor： HOPP MATHIAS DR ,  ARNTZ DIETRICH DR ,  BOCK WOLFGANG DR ,  BOSSE-PLOIS ANDREAS ,  RAIBLE KLAUS

IPC: B01J31/10 ,  C07B61/00 ,  C07D317/12

Abstract: Prepn. of 2-vinyl-1,3-dioxolane, comprises the following steps: (1) reaction of acrolein with ethylene glycol at less than 50 degrees C in the presence of a solid acid catalyst; (2) extraction of the reaction mixt. with an organic solvent having a b.pt. greater than 130 degrees C, in which ethylene glycol is essentially insoluble; and (3) distilln. of the aq. phase contg. ethylene glycol and the organic phase contg. the dioxolane.

公开(公告)号：ES2166029T3

公开(公告)日：2002-04-01

申请号：ES97111737

申请日：1997-07-10

Applicant: DEGUSSA

Inventor： SAUER JORG DR ,  BOCK WOLFGANG DR ,  VON HIPPEL LUKAS DR ,  BURKHARDT WERNER ,  RAUTENBERG STEPHEN DR ,  ARNTZ DIETRICH DR

IPC: B01J23/04 ,  B01J23/30 ,  B01J35/10 ,  B01J37/02 ,  C07B61/00 ,  C07C319/08 ,  C07C321/04

Abstract: In a moulded aluminium oxide catalyst containing an alkali tungstate s promoter, used for synthesis of methyl mercaptan, the promoter is caesium tungstate (I) in an amount > 15 to 40 wt.% with respect to the total amount of catalyst.

公开(公告)号：ES2154873T3

公开(公告)日：2001-04-16

申请号：ES97121628

申请日：1997-12-09

Applicant: DEGUSSA

Inventor： HOFEN WILLI ,  BOCK WOLFGANG DR ,  RAUTENBERG STEPHAN DR ,  SAUER JORG DR ,  ARNTZ DIETRICH DR ,  GOEDECKE RALF DR

IPC: B01J21/04 ,  B01J23/30 ,  C07B61/00 ,  C07C319/08 ,  C07C321/04

Abstract: A process for the continuous production of methyl-mercaptan (I) comprises (i) reacting a mixture of methanol and hydrogen sulphide (H2S) in the vapour phase at 300-500 degrees C and 5-15 bar on an alumina-based catalyst bed and (ii) separating (I) from the gas mixture obtained by absorption and distillation, with recycling of unreacted methanol and H2S, removal of inert gas and waste water, and replacement of used methanol and H2S. The starting gas mixture is obtained by (a) compressing fresh H2S to an intermediate pressure (P1) with addition of liquid methanol, (b) adding the recycled H2S and compressing the mixture to operating pressure (P2), (c) adding more methanol in the form of vapour to give a compressed mixture with a mol ratio of (H2S):(methanol) = 1.1-3, (d) preheating the gas mixture to 150-200 degrees C, (e) heating to reaction temperature using the heat of reaction released on the catalyst and (f) reaction on the catalyst bed.

公开(公告)号：ES2154874T3

公开(公告)日：2001-04-16

申请号：ES97122374

申请日：1997-12-18

Applicant: DEGUSSA

Inventor： HOFEN WILLI ,  BOCK WOLFGANG DR ,  RAUTENBERG STEPHAN DR ,  SAUER JORG DR ,  ARNTZ DIETRICH DR ,  GOEDECKE RALF DR

IPC: C07C319/02 ,  C07C319/28 ,  C07C321/04

公开(公告)号：ES2022068T3

公开(公告)日：1995-06-16

申请号：ES90117465

申请日：1990-09-11

Applicant: DEGUSSA

Inventor： BOCK WOLFGANG DR ,  ARNTZ DIETRICH DR ,  PRESCHER GUNTER DR ,  BURKHARDT WERNER

IPC: B01J23/88 ,  B01J23/883 ,  B01J27/192 ,  B01J35/02 ,  B01J35/10 ,  C07B61/00 ,  C07C45/28 ,  C07C45/34 ,  C07C45/35 ,  C07C47/22

Abstract: The invention relates to a process for producing acrolein by catalytic gas-phase oxidation of propene with air in the presence of steam and inert gas or waste gas from the reaction, the feed stocks being passed in defined quantitative ratios at 300 - 380 DEG C and 1.4 - 2.2 bar over a catalyst containing the MoFeCoNiBiP(As)K(Rb,Cs)SmSiO element combination in the form of a bed of individual particles, the catalyst particles meeting defined geometrical conditions and a number of essential physical-chemical parameters, and a specific loading of 2 - 8 mol of propene/dm of catalyst bed/hour being set.

公开(公告)号：ES2022070T3

公开(公告)日：1994-03-01

申请号：ES90117464

申请日：1990-09-11

Applicant: DEGUSSA

Inventor： BOCK WOLFGANG DR ,  ARNTZ DIETRICH DR ,  PRESCHER GUNTER DR ,  BURKHARDT WERNER

IPC: B01J27/192 ,  B01J35/02 ,  B01J35/10 ,  C07B61/00 ,  C07C45/35 ,  C07C47/22 ,  C07C51/25

Abstract: A catalyst is described for the production of unsaturated aldehydes by means of oxidation with a oxygen-containing gas where an active mass, containing at least the elements Mo, Bi, P and O, as well as Si-containing carrier material, is used in the form of a catalyst body with a certain ratio between the outer surface and the volume and with a defined extent in terms of space, porosity, density, specific surface, breaking strength, abrasion, and gas through-flow capability. Also described is a method of making the catalyst.