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271 records (took 0.019 seconds)

    123.
    发明专利
    未知

    公开(公告)号：DE59000718D1

    公开(公告)日：1993-02-18

    申请号：DE59000718

    申请日：1990-07-26

    Applicant: DEGUSSA

    Inventor： KLOCKNER HANS-JUERGEN DR ,  PANSTER PETER DR ,  KLEINSCHMIT PETER DR

    IPC: B01J31/06 ,  C01B33/04 ,  C01B33/107 ,  C07F7/12

    Abstract: A process for the dismutation of chlorosilanes is disclosed in which the latter are in the gas phase for 0.01-100 sec. at 55 DEG -100 DEG C. or in the liquid phase for 1-1000 sec. at 25 DEG -55 DEG C. conducted in the presence of a catalyst, which is either unformed or is present in the form of spherical pellets, and which consists of one of four different organopolysiloxane compounds, optionally cross-linked, which essentially carry an amino or ammonium group as a functional group.

    Pyrogenic niobium oxide - useful for prodn. of catalysts, ceramics and glass
    124.
    发明专利
    Pyrogenic niobium oxide - useful for prodn. of catalysts, ceramics and glass 未知

    公开(公告)号：DE4102328A1

    公开(公告)日：1992-07-30

    申请号：DE4102328

    申请日：1991-01-26

    Applicant: DEGUSSA

    Inventor： HARTMANN WERNER DR ,  KLEINSCHMIT PETER DR ,  SCHWARZ RUDOLF DR

    IPC: B01J23/20 ,  C01G33/00 ,  C03C1/00 ,  C04B35/495

    Abstract: Pyrogenically producing Nb oxide involves vapourising anhydrous Nb chloride, leading it together with an inert gas into the mixing chamber of a burner, there mixing it with H2 and dry air and/or O2 and burning the mixt. in the combustion chamber, subsequently sepg. the Nb2O5 from the gaseous reaction prods. and opt. freeing it of entrained HCl by heating in moist air. USE/ADVANTAGE - The prod. is easier to produce in pure anhydrous form than when using the known wet processes. The pyrogenic Nb2O5 has typical properties of BET surface = 20-120 m2/g, chloride content (after deacidification) less than 1 wt.%, powder density 80-200 g/l, prim. particle size 20-100 nm and ignition loss (2 h at 1000 deg. C) 0.5-5 wt.%. The prod. is useful in the prodn. of catalysts, ceramic materials and glasses

    127.
    发明专利
    未知

    公开(公告)号：DE4029405A1

    公开(公告)日：1991-09-19

    申请号：DE4029405

    申请日：1990-09-17

    Applicant: DEGUSSA

    Inventor： SEXTEL GERHARD DR ,  REUTER ROLAND ,  STRACK HANS DR ,  KLEINSCHMIT PETER DR ,  SCHWARZ RUDOLF DR

    IPC: B32B7/02 ,  B32B5/16 ,  B32B27/08 ,  B65D81/18 ,  B65D81/38 ,  C04B14/36 ,  C04B38/00 ,  E04B1/80 ,  F16L59/00 ,  F16L59/02 ,  F25D23/06

    Abstract: Element, preferably in panel form, for use as thermal insulation, comprising …… a) a finely dispersed, pulverulant or fibrous substance, … b) a microporous covering and … c) a gas-tight and water-proof metal-free covering. …… The element is produced by drying the pulverulant or fibrous substance, if appropriate, introducing it into a microporous covering, if appropriate, compressing it, if appropriate, and then drying it, if appropriate. After that, the pulverulant substance with the microporous covering is introduced into a gas-tight and water-proof, metal-free covering. If appropriate, this gas-tight and water-proof covering is evacuated and sealed. … …

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