中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

110 records (took 0.02 seconds)

    41.
    发明专利
    未知

    公开(公告)号：PT1073608E

    公开(公告)日：2002-03-28

    申请号：PT99919213

    申请日：1999-03-31

    Applicant: DEGUSSA

    Inventor： BERTSCH-FRANK BIRGIT ,  RUDIGER SCHUTTE DR ,  BALDUF TORSTEN ,  BECKER-BALFANZ CATRIN ,  HEMME INA ,  ROLLMANN JURGEN ,  WILDNER WERNER

    IPC: B01J8/02 ,  C01B15/029

    Abstract: An aqueous solution of hydrogen peroxide is produced by direct synthesis from hydrogen and oxygen in the presence of a heterogeneous catalyst. According to the invention, a gas mixture comprising H2 and O2, essentially saturated or supersaturated with water (=containing fog) is fed into a reactor containing the catalyst. The volume ratio of the gas mixture fed in (standard liters per hour) to liquid removed (liters per hour) is adjusted to a value equal to or greater than 15,000, especially 20,000 to 50,000, and the gas mixture leaving the reactor is recycled after replenishment with H2, O2, and H2O vapor. Solutions with high H2O2 concentration can be obtained according to the invention without additional concentration.

    42.
    发明专利
    未知

    公开(公告)号：DE19912733A1

    公开(公告)日：2000-09-21

    申请号：DE19912733

    申请日：1999-03-20

    Applicant: DEGUSSA

    Inventor： BERTSCH-FRANK BIRGIT ,  HEMME INA ,  HIPPEL LUKAS VON ,  KATUSIC STIPAN ,  ROLLMANN JUERGEN

    IPC: B01J23/40 ,  B01J23/44 ,  B01J23/48 ,  B01J37/08 ,  C01B15/029 ,  C01B15/01 ,  B01J23/38

    Abstract: In direct synthesis of hydrogen peroxide from hydrogen and oxygen using a heterogeneous noble metal catalyst and optionally solvent, the catalyst is based on palladium or NOTLESS 2 metals of the platinum group and sub-group I. In direct synthesis of hydrogen peroxide from hydrogen and oxygen using a heterogeneous noble metal catalyst and optionally solvent, the catalyst is based on palladium or NOTLESS 2 metals of the platinum group and sub-group I. It is produced by passing particles of a solution or suspension of metal compound(s) in a carrier gas into a spray or flame pyrolysis reactor and separating the resultant metal or alloy particles from the gas stream.

    43.
    发明专利
    未知

    公开(公告)号：BR9902669A

    公开(公告)日：2000-03-08

    申请号：BR9902669

    申请日：1999-07-09

    Applicant: DEGUSSA

    Inventor： BEWERSDORF MARTIN ,  BERTSCH-FRANK BIRGIT ,  KAISER LOTHAR ,  KOHLEN RAINER ,  OVERDICK RALPH ,  SHEIBE MICHEL

    IPC: B01J2/16 ,  C01B15/00 ,  C01B15/10 ,  C11D3/39

    Abstract: Fluidized-bed coating of peroxy compounds, especially sodium percarbonate for use in detergent and bleaching products. Production of coated peroxy compounds by fluidized-bed coating comprises spraying an aqueous coating solution onto particles of the peroxy compound in a fluidized-bed chamber and drying the coating by means of a fluidizing gas injected through a radial distributor plate at a fluidized bed temperature of 30-70 degrees C, where the fluidizing gas emerges (upwards) from openings in the distributor plate at an angle of less than 35 degrees to the horizontal and the coating solution emerges (downwards) from spray nozzles at the same angle.

    METHOD FOR PRODUCING HYDROGEN PEROXIDE BY DIRECT SYNTHESIS
    44.
    发明专利
    METHOD FOR PRODUCING HYDROGEN PEROXIDE BY DIRECT SYNTHESIS 未知

    公开(公告)号：CA2328107A1

    公开(公告)日：1999-10-21

    申请号：CA2328107

    申请日：1999-03-31

    Applicant: DEGUSSA

    Inventor： WILDNER WERNER ,  BERTSCH-FRANK BIRGIT ,  BALDUF TORSTEN ,  ROLLMANN JURGEN ,  SCHUTTE RUDIGER ,  HEMME INA ,  BECKER-BALFANZ CATRIN

    IPC: B01J8/02 ,  C01B15/029

    Abstract: The invention relates to a method for producing an aqueous solution of hydrogen peroxide from hydrogen and oxygen by direct synthesis in the presence of a heterogeneous catalyst. According to this method, a mixture containing H2 and O2 is supplied to the reactor which contains the catalyst. Said gas mixture is essentially saturated or oversaturated (= containing mist) with water vapour. The volume ratio of gas mixture (Nl/h) supplied to liquid (l/h) taken off is adjusted to values equal to or greater than 15,000, especially 20,000 to 50,000 and the gas mixture leaving the reactor is re-stocked with H2, O2 and H2O vapour and recycled. According to the invention, solutions with a high concentration of H2O2 can be obtained without any further concentration.

    45.
    发明专利
    未知

    公开(公告)号：DE19816296A1

    公开(公告)日：1999-10-14

    申请号：DE19816296

    申请日：1998-04-11

    Applicant: DEGUSSA

    Inventor： BERTSCH-FRANK BIRGIT ,  BALDUF TORSTEN ,  BECKER-BALFANZ CATRIN ,  HEMME INA ,  ROLLMANN JUERGEN ,  SCHUETTE RUEDIGER ,  WILDNER WERNER

    IPC: B01J8/02 ,  C01B15/029 ,  C01B15/01

    Abstract: The invention relates to a method for producing an aqueous solution of hydrogen peroxide from hydrogen and oxygen by direct synthesis in the presence of a heterogeneous catalyst. According to this method, a mixture containing H2 and O2 is supplied to the reactor which contains the catalyst. Said gas mixture is essentially saturated or oversaturated (= containing mist) with water vapour. The volume ratio of gas mixture (Nl/h) supplied to liquid (l/h) taken off is adjusted to values equal to or greater than 15,000, especially 20,000 to 50,000 and the gas mixture leaving the reactor is re-stocked with H2, O2 and H2O vapour and recycled. According to the invention, solutions with a high concentration of H2O2 can be obtained without any further concentration.

    46.
    发明专利
    未知

    公开(公告)号：DE59405647D1

    公开(公告)日：1998-05-14

    申请号：DE59405647

    申请日：1994-02-15

    Applicant: DEGUSSA

    Inventor： KLASEN CLAAS-JUERGEN ,  BERTSCH-FRANK BIRGIT ,  LIESER THOMAS ,  SCHUBERT PETER ,  MUELLER KLAUS

    IPC: B01D12/00 ,  C01B15/10 ,  C11D3/39 ,  C11D17/00

    Abstract: PCT No. PCT/EP94/00422 Sec. 371 Date Sep. 28, 1995 Sec. 102(e) Date Sep. 28, 1995 PCT Filed Feb. 15, 1994 PCT Pub. No. WO94/20413 PCT Pub. Date Sep. 15, 1994The invention relates to a method for increasing the storage stability of sodium percarbonate (2 Na2CO3.3 H2O2) by coating with a sodium perborate. According to the present invention wet sodium percarbonate salt, obtained by reacting sodium carbonate with hydrogen peroxide in aqueous phase and separating the salt from the aqueous phase, is treated with a solution or suspension containing sodium perborate in a solid-liquid separator by a kind of displacement wash. In contrast to previously known methods, according to the present invention a greater storage stability is attained with smaller quantities of perborate coating.

    48.
    发明专利
    未知

    公开(公告)号：DE59403562D1

    公开(公告)日：1997-09-04

    申请号：DE59403562

    申请日：1994-02-28

    Applicant: DEGUSSA

    Inventor： BERTSCH-FRANK BIRGIT ,  KLASEN CLAAS-JUERGEN ,  LIESER THOMAS ,  MUELLER KLAUS ,  BEWERSDORF MARTIN

    IPC: C01B15/10 ,  C02F1/00 ,  C11D3/39 ,  C11D3/395 ,  C11D17/00

    Abstract: PCT No. PCT/EP94/00576 Sec. 371 Date Oct. 2, 1995 Sec. 102(e) Date Oct. 2, 1995 PCT Filed Feb. 28, 1994 PCT Pub. No. WO94/24044 PCT Pub. Date Oct. 27, 1994Sodium percarbonate is often used in the form of coated particles to increase its storage stability in detergents. Sodium percarbonate particles coated in accordance with the invention have a coating containing reaction products from the reaction of a dialkali metal tetraborate or alkali metal pentaborate with aqueous hydrogen peroxide. Preferred coating components are: perborax with the formula Na2B4O7xH2O2, where n =2 or 4. The coated sodium percarbonate particles are produced by coating the percarbonate particles using a solution containing the reaction products mentioned above. Detergent, bleaching and cleaning compositions containing sodium percarbonate particles coated in accordance with the invention are distinguished by very high stability in storage.

    49.
    发明专利
    未知

    公开(公告)号：DE59402931D1

    公开(公告)日：1997-07-03

    申请号：DE59402931

    申请日：1994-04-23

    Applicant: DEGUSSA

    Inventor： BEWERSDORF MARTIN ,  KLASEN CLAAS-JUERGEN ,  LOOK-HERBER PETRA ,  BERTSCH-FRANK BIRGIT ,  LIESER THOMAS ,  MUELLER KLAUS

    IPC: B01D1/20 ,  B01J2/04 ,  B01J2/16 ,  B05B7/06 ,  C01B15/10

    Abstract: Sodium percarbonate of the formula 2 Na2CO3 3 H2O2 can be produced by fluidised-bed spray granulation by spraying an aqueous solution of sodium carbonate and a hydrogen peroxide solution on sodium percarbonate seeds and evaporating water. The previously necessary use of phosphorus-containing crystallisation inhibitor to prevent blockages and incrustations in and on the nozzle can be avoided by the invention if the solutions are sprayed using a single three-substance pulverisation nozzle with the external mixing of the solutions.

Patent Agency Ranking