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    PRODUCTION OF CYCLIC 4-OXAMIDINE
    3.
    发明专利
    PRODUCTION OF CYCLIC 4-OXAMIDINE 失效

    公开(公告)号：JPH11322721A

    公开(公告)日：1999-11-24

    申请号：JP8193999

    申请日：1999-03-25

    Applicant: DEGUSSA

    Inventor： DRAUZ KARLHEINZ ,  HOFFMANN ROLF DR ,  PELGRIMS IVAN

    IPC: C07D233/32 ,  C07D233/70 ,  C07D235/02

    Abstract: PROBLEM TO BE SOLVED: To advantageously obtain a cyclic 4-oxamidine useful in synthesis of extremely pure and biologically active substances, etc., in good yield or extremely excellent yield by oxidizing or dehydrogenating a specific cyclic compound or its salt. SOLUTION: In this method for producing a compound of formula I [R and R are each H, a 1-8C alkyl, 2-8C alkenyl or the like; R to R are each same as R ; (n) is 1-3], a cyclic compound of formula II or its salt is oxidized or dehydrogenated. Furthermore, the compound of formula II is preferably produced by reacting α-aminonitrile with an aldehyde and the oxidation is carried out by using a halogen or an agent from a group of a halogen derivative, especially by using Cl2 as an oxidizing agent and dehydrogenation is preferably carried out in the presence of Ru or an agent from a group of Ru, etc., especially palladium, in an organic solvent or a solvent mixture, especially in ketone within the temp. range of 50-250 deg.C.

    5.
    发明专利
    未知

    公开(公告)号：DK0846486T3

    公开(公告)日：2001-01-29

    申请号：DK97120514

    申请日：1997-11-22

    Applicant: DEGUSSA

    Inventor： SCHUETTE RUEDIGER DR ,  RUHS ALEXANDER DR ,  PELGRIMS IVAN

    IPC: B01D9/00 ,  B01D9/02 ,  B01D19/02 ,  B01J8/18 ,  B01J8/22 ,  B01J19/00

    Abstract: Reducing or preventing foaming in chemical and physical transformation processes in liquid media comprises carrying out the transformation in a buoyancy-free jet reactor with no baffles, which has a tapered lower part and is fitted with a gas injector in a position which facilitates circulation without buoyancy. The reactor contents are thoroughly mixed by gas injection. Also claimed is an apparatus for the above process, with a pipe connection for taking off a high-solids suspension and an inlet tube for a liquid medium above the gas injector, the outlet of this tube being located in the cloud of bubbles formed when the apparatus is working.

    A process for the preparation of granulated materialistribution, and a device for carrying out said process
    7.
    发明专利
    A process for the preparation of granulated materialistribution, and a device for carrying out said process 未知

    公开(公告)号：AU3924997A

    公开(公告)日：1998-04-02

    申请号：AU3924997

    申请日：1997-09-25

    Applicant: DEGUSSA

    Inventor： SCHUTTE RUDIGER ,  RUHS ALEXANDER ,  PELGRIMS IVAN ,  KLASEN CLAAS-JURGEN ,  KAISER LOTHAR

    IPC: B01J2/16 ,  C01B15/10

    Abstract: PROBLEM TO BE SOLVED: To obtain two or more fraction having different particle distributions somewhat continuously. SOLUTION: Particulate matter is produced by a continuous fluidized bed spray granulation. In this case, the particulate matter is discharged by a discharge device having classifying effect by an area ratio of time integral of a discharge surface 'f' to floor area F of a fluidized bed causing periodic vibration. By decreasing the area ratio f/F, the vibration is controlled, and by further decreasing it, a change of a amplitude is increased. Fractions of different particle size distributions are obtained by fractionally removing particulate matter during one period. The area ratio f/F is 5 0/00-0.1 0/00.

    8.
    发明专利
    未知

    公开(公告)号：AT221856T

    公开(公告)日：2002-08-15

    申请号：AT98106360

    申请日：1998-04-07

    Applicant: DEGUSSA

    Inventor： SCHUETTE RUEDIGER DR ,  PELGRIMS IVAN ,  KAISER LOTHAR ,  BEWERSDORF MARTIN DR

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

    Abstract: Coated particles of sodium percarbonate consisting of a core of sodium percarbonate made by crystallisation in the aqueous phase and a two-layer coating adhering to and enveloping the core, applied by spraying in a whirling bed, in which the innermost layer consists essentially of Na percarbonate and the outer layer consists essentially of Na sulphate which may be partially hydrated.

    9.
    发明专利
    未知

    公开(公告)号：PT846486E

    公开(公告)日：2001-01-31

    申请号：PT97120514

    申请日：1997-11-22

    Applicant: DEGUSSA

    Inventor： PELGRIMS IVAN ,  RUDIGER SCHUTTE DR ,  ALEXANDER RUHS DR

    IPC: B01D9/00 ,  B01D9/02 ,  B01D19/02 ,  B01J8/18 ,  B01J8/22 ,  B01J19/00

    Abstract: Reducing or preventing foaming in chemical and physical transformation processes in liquid media comprises carrying out the transformation in a buoyancy-free jet reactor with no baffles, which has a tapered lower part and is fitted with a gas injector in a position which facilitates circulation without buoyancy. The reactor contents are thoroughly mixed by gas injection. Also claimed is an apparatus for the above process, with a pipe connection for taking off a high-solids suspension and an inlet tube for a liquid medium above the gas injector, the outlet of this tube being located in the cloud of bubbles formed when the apparatus is working.

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