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    2.
    发明专利
    未知

    公开(公告)号：DE10314203A8

    公开(公告)日：2005-02-10

    申请号：DE10314203

    申请日：2003-03-28

    Applicant: DEGUSSA ,  STOCKHAUSEN CHEM FAB GMBH

    Inventor： HOFF ANDREAS ,  KOBUS AXEL ,  YU-CHIANG DENNIS THONG ,  GOEDECKE RALF ,  ROOS MARTIN ,  BALDUF TORSTEN

    IPC: C07C51/50 ,  C07C57/07 ,  C07B63/00

    Abstract: The present invention concerns a process for separation of a monomer including at least one double bond, hereafter referred to as "monomer," in particular (meth)acrylic acid, from a composition Z including this monomer and at least one impurity different to the monomer, including the steps of bringing into contact of the composition Z with an additive by forming a separation phase. The additive has a melting point of at most about 150° C. and a vapour pressure at a temperature of 20° C. of at most about 1 mbar. The monomer is then separated from the separation phase. A device for producing a monomer, the use of additives in the separation of a monomer from a monomer-comprising composition, the monomer obtainable by the process according to the invention, chemical products comprising the monomer as well as the use of the monomer in or for production of chemical products.

    6.
    发明专利
    未知

    公开(公告)号：FI932350A

    公开(公告)日：1993-11-26

    申请号：FI932350

    申请日：1993-05-24

    Applicant: DEGUSSA

    Inventor： EICKHOFF HUBERT ,  SCHIRRMACHER RUEDIGER ,  MANGARTZ KARL-HEINZ ,  HUBER HANS-MARTIN ,  GOEDECKE RALF

    IPC: B01D39/16 ,  B01D39/20 ,  B01D61/14 ,  B01D71/00 ,  B01J8/00 ,  C01B15/013 ,  C01B15/023

    Abstract: The invention relates to a process for the separation of catalyst-free working solution from working solution containing palladium black, of the hydrogenation cycle of the anthraquinone process for the preparation of hydrogen peroxide. The object of the invention was to improve the separation of a catalyst-free working solution from the hydrogenation cycle containing palladium black, which separation had previously been carried out using filter cartridges, and thus to reduce the process costs. The object is achieved by employing a microfilter which operates according to the cross-current principle and has a filter membrane made of ceramic material, especially alpha -alumina or polyolefin having a mean pore width in the range from 0.1 to 3.0 mu m; the cross-current velocity is in general from 0.5 to 5 m/sec.

    PROCESS FOR PRODUCING CYANURIC CHLORIDE (I)
    7.
    发明专利
    PROCESS FOR PRODUCING CYANURIC CHLORIDE (I) 未知

    公开(公告)号：CA1100499A

    公开(公告)日：1981-05-05

    申请号：CA336965

    申请日：1979-10-04

    Applicant: DEGUSSA

    Inventor： GOEDECKE RALF ,  LIEBERT MARTIN ,  NISCHK WOLFGANG ,  PLOTZ WOLFGANG ,  PUSCHNER KURT

    IPC: C07D251/28

    Abstract: The present invention provides a process for producing cyanuric chloride in a solid or liquid form from the reaction mixture obtained on trimerizing cyanogen chloride, in which process for producing cyanuric chloride selectively in a liquid or solid form the reaction gas mixture is fed to an apparatus substantially comprising a separating column and a condenser connected in series therewith, the reaction gas mixture is injected above the separating column and the bottom of the separating column is kept at the boiling temperature of the cyanuric chloride, the cyanuric chloride contained in the reaction gas mixture being partially condensed in the temperature range from 146 to 190.degree.C depending on the selection of the temperature at the outlet of the condenser, whereupon to obtain the liquid form, the liquid cyanuric chloride is drawn off as such at a lower end of the separating column and/or fed directly or after intermediate storage to a spray tower and sprayed therein, and a solid, finegrained cyanuric chloride is removed at the bottom of the spray tower, the residual gas leaving the condenser and still containing cyanuric chloride, the amount of which corresponds to the temperature selected at the outlet of the condenser, is fed to a separating chamber, where the residual cyanuric chloride is recovered.

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