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    Method for producing aliphatic isocyanate
    2.
    发明专利
    Method for producing aliphatic isocyanate 有权

    公开(公告)号：JP2004168778A

    公开(公告)日：2004-06-17

    申请号：JP2003388494

    申请日：2003-11-18

    Applicant: Degussa Ag ,  デグサ アクチエンゲゼルシャフト

    Inventor： KOHLSTRUK STEPHAN ,  KRECZINSKI MANFRED ,  LETTMANN CHRISTIAN ,  STOCHNIOR GUIDO ,  SPYROU EMMANOUIL ,  FINKE NORBERT ,  LOMOELDER RAINER

    IPC: B01J23/46 ,  B01J35/04 ,  C07B61/00 ,  C07C263/04 ,  C07C263/16 ,  C07C265/10 ,  C07C265/14

    CPC classification number: C07C263/04 ,  C07C265/10

    Abstract: PROBLEM TO BE SOLVED: To provide a manufacturing method of obtaining a desired alicyclic isocyanate with a high selectivity. SOLUTION: The method comprises reacting an aromatic isocyanate with hydrogen in the presence of a supported catalyst containing ruthenium alone as the active metal or together with at least one metal of subgroup I, VII and VIII metals in the periodic table in an amount of 0.01-20 mass%, the catalyst carrier having a BET surface area of 30 m 2 /g to less than 70 m 2 /g and not less than 50 % of the pore volume of the catalyst carrier being micropores having a pore diameter of greater than 50 nm and less than 50 % of the pore volume of the catalyst carrier being micropores having a pore diameter of 2-50 nm. According to this method, a desired isocyanate can be obtained with a high selectivity and the ratio of the 4,4'-trans-trans-isomer is low and in this instance, the low 4,4'-trans-trans-isomer ratio can be maintained in spite of a high degree of conversion. The catalyst life is long and, simultaneously, and the isomer distribution hardly changes even after a considerably long-term operation. COPYRIGHT: (C)2004,JPO

    METHOD FOR PRODUCING ISOPHORONEDIAMINE
    4.
    发明专利
    METHOD FOR PRODUCING ISOPHORONEDIAMINE 审中-公开

    公开(公告)号：JP2002226439A

    公开(公告)日：2002-08-14

    申请号：JP2001390387

    申请日：2001-12-21

    Applicant: DEGUSSA

    Inventor： OSTGARD DANIEL ,  BERWEILER MONIKA ,  ROEDER STEFAN ,  SAUER JOERG DR ,  JAEGER BERND DR ,  FINKE NORBERT ,  LETTMANN CHRISTIAN

    IPC: C07B61/00 ,  C07C209/48 ,  C07C209/52 ,  C07C211/36

    Abstract: PROBLEM TO BE SOLVED: To provide a method for producing isophoronediamine from isophoronenitrile, comprising hydrogenating in the presence of a Raney catalyst having a small apparent density and a good hydrogenation activity. SOLUTION: This method for producing the isophoronediamine from isophoronenitrile, isophoronenitrileimine and/or their mixture comprises hydrogenating into the isophoronediamine in the presence of at least ammonia, hydrogen, and a hollow type Raney hydrogenation catalyst based on at least cobalt, nickel, copper and/or iron. The production of the isophoronediamine in a high conversion and in an extremely good yield can be achieved using substantially small amounts of the catalyst materials, because the apparent density of the catalyst is small.

    5.
    发明专利
    未知

    公开(公告)号：DE50305554D1

    公开(公告)日：2006-12-14

    申请号：DE50305554

    申请日：2003-09-24

    Applicant: DEGUSSA

    Inventor： KOHLSTRUCK STEPHAN ,  KRECZINSKI MANFRED ,  LETTMANN CHRISTIAN ,  STOCHNIOL GUIDO ,  SPYROU EMMANOUIL ,  FINKE NORBERT ,  LOMOELDER RAINER

    IPC: B01J23/46 ,  C07C263/04 ,  B01J35/04 ,  C07B61/00 ,  C07C263/16 ,  C07C265/10 ,  C07C265/14

    Abstract: Preparation of aliphatic isocyanates from the corresponding aromatic isocyanates comprises urethanization of the aromatic isocyanate, hydrogenation of the urethane with hydrogen in the presence of a supported ruthenium catalyst having a BET surface area of 30-70 m2/g and greater than 50% of the pore volume comprising macropores having a pore diameter of greater than 50 nm and cleavage of the hydrogenated urethane to the aliphatic isocyanate. A process for the preparation of aliphatic isocyanates from the corresponding aromatic isocyanates having at least one aromatic ring and one or more isocyanates bonded directly or indirectly to at least one aromatic ring comprises: (a) urethanization of the aromatic isocyanate; (b) hydrogenation of the aromatic urethane with hydrogen in the presence of a supported catalyst (I) comprising 0.01-20 wt.% ruthenium, optionally with at least one Group 1, 7 or 8 metal as the active metal on a support having a BET surface area of 30-70 m2/g and greater than 50% of the pore volume comprising macropores having a pore diameter of greater than 50 nm and less than 50% mesopores having a pore diameter of 2-50 nm and; (c) cleavage of the hydrogenated urethane to the aliphatic isocyanate.

    6.
    发明专利
    未知

    公开(公告)号：DE10253803A1

    公开(公告)日：2004-05-27

    申请号：DE10253803

    申请日：2002-11-18

    Applicant: DEGUSSA

    Inventor： KOHLSTRUK STEPHAN ,  KRECZINSKI MANFRED ,  LETTMANN CHRISTIAN ,  STOCHNIOL GUIDO ,  SPYROU EMMANOUIL ,  FINKE NORBERT ,  LOMOELDER RAINER

    IPC: B01J23/46 ,  B01J35/04 ,  C07B61/00 ,  C07C263/04 ,  C07C263/16 ,  C07C265/10 ,  C07C265/14

    Abstract: Preparation of aliphatic isocyanates from the corresponding aromatic isocyanates comprises urethanization of the aromatic isocyanate, hydrogenation of the urethane with hydrogen in the presence of a supported ruthenium catalyst having a BET surface area of 30-70 m2/g and greater than 50% of the pore volume comprising macropores having a pore diameter of greater than 50 nm and cleavage of the hydrogenated urethane to the aliphatic isocyanate. A process for the preparation of aliphatic isocyanates from the corresponding aromatic isocyanates having at least one aromatic ring and one or more isocyanates bonded directly or indirectly to at least one aromatic ring comprises: (a) urethanization of the aromatic isocyanate; (b) hydrogenation of the aromatic urethane with hydrogen in the presence of a supported catalyst (I) comprising 0.01-20 wt.% ruthenium, optionally with at least one Group 1, 7 or 8 metal as the active metal on a support having a BET surface area of 30-70 m2/g and greater than 50% of the pore volume comprising macropores having a pore diameter of greater than 50 nm and less than 50% mesopores having a pore diameter of 2-50 nm and; (c) cleavage of the hydrogenated urethane to the aliphatic isocyanate.

    7.
    发明专利
    未知

    公开(公告)号：DE10253802A1

    公开(公告)日：2004-06-03

    申请号：DE10253802

    申请日：2002-11-18

    Applicant: DEGUSSA

    Inventor： FINKE NORBERT ,  LOMOELDER RAINER ,  LETTMANN CHRISTIAN ,  STOCHNIOL GUIDO

    IPC: B01J23/46 ,  B01J35/00 ,  B01J35/10 ,  B01J37/02 ,  B01J37/18 ,  C07B61/00 ,  C07C269/06 ,  C07C271/12 ,  C07C271/24 ,  C07C271/06

    Abstract: Hydrogenation of aromatic urethanes comprises reaction of the aromatic urethanes with hydrogen in the presence of a supported catalyst comprising 0.01-20 wt.% ruthenium on a support having a BET surface area of 30-70 m2/g and greater than 50 % of the pore volume comprising macropores having a pore diameter of greater than 50 nm and less than 50% mesopores having a pore diameter of 2-50 nm. A process for the hydrogenation of aromatic urethanes having one or more aromatic rings and at least one urethane group that is directly and/or indirectly bonded to at least one aromatic ring, comprises reaction of the aromatic urethanes with hydrogen in the presence of a supported catalyst (I) comprising 0.01-20 wt.% ruthenium, optionally with at least one Group 1, 7 or 8 metal as the active metal on a support having a BET surface area of 30-70 m2/g and greater than 50 % of the pore volume comprising macropores having a pore diameter of greater than 50 nm and less than 50 % mesopores having a pore diameter of 2-50 nm.

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