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    REDUCTION OF ACETAL OR KETAL CONTENT IN REACTION MIXTURE
    1.
    发明专利
    REDUCTION OF ACETAL OR KETAL CONTENT IN REACTION MIXTURE 失效

    公开(公告)号：JP2000086557A

    公开(公告)日：2000-03-28

    申请号：JP24759899

    申请日：1999-09-01

    Applicant: DEGUSSA

    Inventor： HAAS THOMAS DR ,  JAEGER BERND DR ,  SAUER JOERG DR ,  VANHEERTUM RUDOLF DR

    IPC: B01J23/44 ,  B01J23/46 ,  B01J23/755 ,  C07B61/00 ,  C07C29/132 ,  C07C29/90 ,  C07C31/20

    Abstract: PROBLEM TO BE SOLVED: To reduce the acetal or ketal in an aqueous phase reaction mixture containing a high-content of alcohol by catalytically hydrogenating the acetal or ketal with a heterogenous catalyst that is acidic or neutral at room temperature thereby further reducing the acetal or ketal without decomposition of alcohol. SOLUTION: Acetals other than formal or ketal in an aqueous phase reaction mixture containing at least 10 moles of monohydric or polyhydric alcohol per mole of acetal or ketal are reduced by catalytically hydrogenation in the presence of a catalyst of a noble metal on activated carbon heterogeneously at 80-250 deg.C, preferably 100-180 deg.C, under a hydrogen partial pressure of 0.5-30 MPa. This process is particularly suitable for removal of the acetals other than formal or ketals of α-hydroxycarbonyl compounds or β-hydroxycarbonyl compound, particularly removal of 1,3-dioxolane derivatives, particularly 1,3-dioxane derivatives.

    PRODUCTION OF ALCOHOL
    2.
    发明专利
    PRODUCTION OF ALCOHOL 失效

    公开(公告)号：JP2000103751A

    公开(公告)日：2000-04-11

    申请号：JP27325599

    申请日：1999-09-27

    Applicant: DEGUSSA

    Inventor： HAAS THOMAS DR ,  JAEGER BERND DR ,  SAUER JOERG DR ,  VANHEERTUM RUDOLF DR

    IPC: B01J23/46 ,  B01J8/02 ,  C07B61/00 ,  C07C29/141 ,  C07C29/145 ,  C07C31/10 ,  C07C31/20 ,  C07C31/26

    Abstract: PROBLEM TO BE SOLVED: To produce an alcohol in high yield by catalytically hydrogenating a specific aldehyde or a ketone in an aqueous solution or an organic solvent at a specified temperature under a specific hydrogen pressure using a specified ruthenium catalyst. SOLUTION: (B) An aldehyde (except 3-hydroxypropionaldehyde) or a ketone is catalytically hydrogenated in an aqueous solution or an organic solvent at 0-200 deg.C temperature under 0.5-30 MPa H2 pressure while using (A) a ruthenium catalyst having 0.1-20 wt.% of ruthenium content and using the ruthenium on an oxide carrier (preferably TiO2 or SiO2) consisting of the group of TiO2, SiO2, ZrO2, MgO2, mixed oxides and silicic salts except zeolite as a catalyst. Furthermore, acetals and ketals which are by-products can be decomposed by conducting the above hydrogenation in the presence of an acidic catalyst.

    METHOD FOR PRODUCING ISOPHORONEDIAMINE
    3.
    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.

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