中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

10 records (took 0.017 seconds)

    3.
    发明专利
    未知

    公开(公告)号：DE3871338D1

    公开(公告)日：1992-06-25

    申请号：DE3871338

    申请日：1988-10-11

    Applicant: DEGUSSA

    Inventor： BEHL WALTER ,  DELLER KLAUS DR ,  MUELLER HERBERT DR

    IPC: B01J10/00 ,  C02F1/20 ,  C02F1/72

    Abstract: Removal of O2 from aq. medium (I), esp. drinking water, is carried out by catalytic hydrogenation on a gp. VIII metal. The novelty is that (I) is sprayed onto a bed of loose or monollithic supported catalyst contg. Pt gp. metal(s) in reduced form in a reactor filled with H2, allowed to trickle or flow through the bed and then discharged from the H2 atoms. The catalyst pref. consists of Pt and/or Pd on activated charcoal, alpha- or gamma-Al2O3, SiO2, Al silicate or ion exchanger partly exchanged with these metals. The catalyst contains 0.01-10, pref. 0.1-5 wt.% noble metal and has a BET surface area of 0.1-2000 m2/g. The catalyst bed consists of a uniform layer or 2 superimposed layers with hydrophobic and/or hydrophilic surface properties. The H2 pressure is 1-10 bar, pref. between normal pressure and 5 bar and the reaction temp. 0-100 deg. C, pref. ambient temp., whilst the dwell time of (I) in the catalyst bed is 0.1-10, pref. 0.2-2 min. The H2 and water are passed through the reactor in parallel and the H2 is removed and recycled. Pt of the (recycled) H2 pref. is used for pre-degassing (I) before entering the reactor. A stationary or moving distributor is used for distributing (I) evenly over the surface of the catalyst bed.

    5.
    发明专利
    未知

    公开(公告)号：DE19751962A1

    公开(公告)日：1999-07-29

    申请号：DE19751962

    申请日：1997-11-24

    Applicant: WACKER CHEMIE GMBH ,  DEGUSSA

    Inventor： MUELLER HERBERT DR ,  BOESING STEFAN ,  SCHMIDHAMMER LUDWIG DR ,  FRANK ALBIN DR ,  HASELWARTER KLAUS

    IPC: B01J23/83 ,  B01J27/122 ,  B01J35/02 ,  B01J35/10 ,  C07B61/00 ,  C07C17/08 ,  C07C17/156 ,  C07C19/045 ,  B01J27/125

    Abstract: A supported catalyst in the form of hollow cylinders with continuous through-channels and specified height:diameter ratios, comprises copper-II compounds, alkali metal compounds, a mixture of cerite earths and zirconium dioxide and an aluminum oxide support. A supported catalyst contains: (a) 0.5-15 wt.% copper-II compound(s) (referred to metal); (b) 0.1-8 wt.% alkali metal compound(s) (referred to metal); (c) 0.1-10 wt.% oxide mixture comprising (c1) 80-95 mol.% cerite earths (atomic number 57-62, excepting promethium) and (c2) 5-20 mol.% zirconium dioxide (ZrO2); and (d) (to make up 100 wt. %) alpha -alumna with a total pore volume of 0.65-1.2 cm /g, in the form of hollow cylinders with at least one through-channel and a ratio of height (h) to outside diameter (da) which is less than 1.5 if da is up to 6 mm and less than 0.6 if da is more than 6 mm. Independent claims are also included for: (1) the production of the catalyst by impregnating support materials of the above geometry (d) with soluble precursors of components (c1) and (c2), converting the precursors into the oxides and impregnating the oxide-containing material with components (a); (2) the production of the catalyst by forming a mixture of components (c) and (d) to the required geometry and impregnating this with (a) and (b); and (3) the production of 1,2-dichloroethane (EDC) by the single- or multistage oxychlorination of ethylene with hydrogen chloride (HCl) at 220-320 degrees C and 3-10 bar in presence of the catalyst, using air or oxygen-enriched air (or pure oxygen with recirculation of unreacted ethylene in the case of recycle gas with a high ethylene content).

Patent Agency Ranking