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    Process for producing carboxylic acid esters and catalysts suitable for this.
    25.
    发明专利
    Process for producing carboxylic acid esters and catalysts suitable for this. 未知

    公开(公告)号：ZA977915B

    公开(公告)日：1998-03-02

    申请号：ZA977915

    申请日：1997-09-03

    Applicant: DEGUSSA

    Inventor： WIELAND STEFAN ,  PANSTER PETER

    IPC: B01J31/06 ,  C07B61/00 ,  C07C67/08 ,  C07C69/14 ,  C07C69/80 ,  C07C ,  C08L

    Abstract: The preparation of carboxylic acid esters comprises: (a) preparation of a reaction mixture containing an alcohol and at least one compound chosen from a carboxylic acid, carboxylic acid anhydride, carboxylic acid ester or partially esterified carboxylic acid; (b) heating the reaction mixture in the presence of a solid polysiloxane with sulphonic acid groups which is insoluble in the reaction medium, whilst stirring intensively and removing water formed in the reaction; and (c) isolating the chosen ester product. Also claimed are: (i) polysiloxanes with sulphonic acid groups, whose surface is modified with 0.1-1 % aluminium oxide compounds or 0.1-5 % titanium or zirconium oxide compounds, with respect to the solids content and (ii) the preparation of surface-modified polysiloxanes with sulphonic acid groups.

    A PROCESS FOR THE AUTOTHERMAL CATALYTIC STEAM REFORMING OF HYDROCARBONS
    26.
    发明专利
    A PROCESS FOR THE AUTOTHERMAL CATALYTIC STEAM REFORMING OF HYDROCARBONS 未知

    公开(公告)号：CA2348120C

    公开(公告)日：2010-08-24

    申请号：CA2348120

    申请日：2001-05-17

    Applicant: DMC2 DEGUSSA METALS CATALYSTS

    Inventor： WIELAND STEFAN ,  BAUMANN FRANK ,  AHLBORN RAINER

    IPC: C01B3/40 ,  C01B3/38 ,  H01M8/06

    Abstract: The invention provides a process for autothermal catalytic steam reforming of hydrocarbons by passing a reactant mixture of hydrocarbons, oxygen and water or water vapour, heated to a preheating temperature, over a catalyst. The process is characterised in that it is operated adiabatically and the catalyst has a coating of a catalyst material on a support structure, the catalyst material containing at least one platinum group metal on an oxidic support material from the group comprising aluminium oxide, silicon dioxide, titanium dioxide or mixed oxides thereof and zeolites.

    29.
    发明专利
    未知

    公开(公告)号：BR0103318A

    公开(公告)日：2002-04-23

    申请号：BR0103318

    申请日：2001-08-10

    Applicant: DMC2 DEGUSSA METALS CATALYSTS

    Inventor： DROST ERNST ,  KUHN WERNER ,  ROOS MEIKE ,  WIELAND STEFAN ,  KEMPF BERND

    IPC: B01D69/10 ,  B01D53/22 ,  B01D67/00 ,  B01D71/02 ,  C01B3/50 ,  C23C14/34 ,  C23C16/06 ,  C23C28/00 ,  H01M4/94 ,  H01M8/0662

    Abstract: Metal membrane contains a metal membrane formed on a supporting surface of a porous membrane carrier. The pores of the membrane carrier are closed in the region of the supporting surface using an auxiliary material before applying the metal membrane and opened after applying the metal membrane by removing the auxiliary material. An independent claim is also included for a process for the production of the metal membrane comprising filling the pores of the membrane carrier using the auxiliary material, polishing and purifying the supporting surface, applying the membrane on the supporting surface, and removing the auxiliary material from the pores of the carrier.

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