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    1.
    发明专利
    未知

    公开(公告)号：ES2094448T3

    公开(公告)日：1997-01-16

    申请号：ES93116792

    申请日：1993-10-18

    Applicant: DEGUSSA

    Inventor： NEHER ARMIN DR ,  HAAS THOMAS DR ,  ARNTZ DIETRICH DR ,  KLENK HERBERT DR ,  GIRKE WALTER

    IPC: C07B61/00 ,  C07C45/52 ,  C07C47/22

    Abstract: A process for the production of acrolein by dehydration of glycerol in the liquid phase or in the gaseous phase, in each case on acidic solid catalysts, is described. Compared with previously known processes, the space-time yield and catalyst service life may be surprisingly increased with higher selectivity by treating a glycerol-water mixture with a glycerol content of 10 to 40 wt. % at 180 DEG to 340 DEG C. (liquid phase) or at 250 DEG to 340 DEG C. (gaseous phase) on a solid catalyst with an Ho value (Hammett acidity function) of less than +2, preferably less than -3.

    3.
    发明专利
    未知

    公开(公告)号：ES2068624T3

    公开(公告)日：1995-04-16

    申请号：ES92104160

    申请日：1992-03-11

    Applicant: DEGUSSA

    Inventor： JAKOB HARALD DR ,  HUTHMACHER KLAUS DR ,  KLENK HERBERT DR

    IPC: C07B57/00 ,  C07C227/34 ,  C07C229/06 ,  C07C229/12

    Abstract: The preparation of L-carnitine by racemate resolution of D,L-carnitine nitrile salts, in particular D,L-carnitine nitrile chloride, using optically active resolving reagent, resolution of the diastereomers, conversion of the diastereomer containing L-carnitine nitrile into a salt of an acid which is not optically active and hydrolysis of the L-carnitine nitrile salt can be successfully carried out in high yield and high enantiomerical purity when N-acetyl-L-proline is used as the resolving reagent. The (L,L)-diastereomer is separated from the diastereomer mixture in crystalline form, which avoids a second, fractional crystallisation step, which was hitherto customary.

    4.
    发明专利
    未知

    公开(公告)号：BR9304715A

    公开(公告)日：1994-11-01

    申请号：BR9304715

    申请日：1993-11-12

    Applicant: DEGUSSA

    Inventor： HAAS THOMAS DR ,  NEHER ARMIN DR ,  ARNTZ DIETRICH DR ,  KLENK HERBERT DR ,  GIRKE WALTER

    IPC: C07C31/20 ,  C07C29/136 ,  C07C29/141 ,  C07C29/145 ,  C07C45/52 ,  C07C45/64 ,  C07C47/22 ,  C07C49/17 ,  C07C29/04 ,  C07C29/132 ,  C07C29/17

    Abstract: The invention relates to a method for the simultaneous preparation of 1,2- and 1,3-propanediol from glycerol. 1,2-Propanediol is customarily prepared from propylene oxide, 1,3-propanediol by hydration of acrolein with subsequent hydrogenation. The process according to the invention comprises the reaction stages (a) dehydration of glycerol by passing a gaseous glycerol/water mixture containing 10 to 40% by weight of glycerol at 250 to 340@C over a solid catalyst having an Ho value (Hammett's acid function) of less than 2, preferably between -3 and -8.2, (b) hydration of the acrolein contained in the reaction mixture of stage (a) and (c) catalytic hydrogenation of the reaction mixture containing the 3-hydroxypropionaldehyde and hydroxyacetone of stage (b). Two useful substances, namely 1,2- and 1,3-propanediol, can simultaneously be obtained in a high total yield from glycerol in a simple process.

    5.
    发明专利
    未知

    公开(公告)号：DE4238493C1

    公开(公告)日：1994-04-21

    申请号：DE4238493

    申请日：1992-11-14

    Applicant: DEGUSSA

    Inventor： NEHER ARMIN DR ,  HAAS THOMAS DR ,  ARNTZ DIETRICH DR ,  KLENK HERBERT DR ,  GIRKE WALTER

    IPC: C07B61/00 ,  C07C45/52 ,  C07C47/22

    Abstract: A process for the production of acrolein by dehydration of glycerol in the liquid phase or in the gaseous phase, in each case on acidic solid catalysts, is described. Compared with previously known processes, the space-time yield and catalyst service life may be surprisingly increased with higher selectivity by treating a glycerol-water mixture with a glycerol content of 10 to 40 wt. % at 180 DEG to 340 DEG C. (liquid phase) or at 250 DEG to 340 DEG C. (gaseous phase) on a solid catalyst with an Ho value (Hammett acidity function) of less than +2, preferably less than -3.

    PROCESS FOR THE PRODUCTION OF ACROLEIN.
    9.
    发明专利
    PROCESS FOR THE PRODUCTION OF ACROLEIN. 未知

    公开(公告)号：MY130089A

    公开(公告)日：2007-05-31

    申请号：MYPI9302378

    申请日：1993-11-12

    Applicant: DEGUSSA

    Inventor： NEHER ARMIN DR ,  HAAS THOMAS DR ,  ARNTZ DIETRICH DR ,  KLENK HERBERT DR ,  GIRKE WALTER

    IPC: C07B61/00 ,  C07C47/22 ,  C07C45/52

    Abstract: THE INVENTION PROVIDES A PROCESS FOR THE PRODUCTION OF ACROLEIN BY DEHYDRATION OF GLYCEROL IN THE LIQUID PHASE OR IN THE GAS PHASE, IN EACH CASE ON ACIDIC SOLID CATALYSTS.COMPARED WITH PREVIOUSLY KNOWN PROCESSES, THE SPACE-TIME YIELD AND CATALYST SERVICE LIFE MAY BE INCREASED WITH HIGHER SELECTIVITY ACCORDING TO THE INVENTION BY TREATING A GLYCEROL-WATER MIXTURE WITH A GLYCEROL CONTENT OF 10 TO 40 WT.% AT 180 TO 340°C (LIQUID PHASE) OR 250 TO 340°C (GAS PHASE) ON A SOLID CATALYST WITH AN HO VALUE (HAMMETT ACIDITY FUNCTION) OF LESS THAN +2, PREFERABLY LESS THAN-3.

    10.
    发明专利
    未知

    公开(公告)号：AT142999T

    公开(公告)日：1996-10-15

    申请号：AT93116792

    申请日：1993-10-18

    Applicant: DEGUSSA

    Inventor： NEHER ARMIN DR ,  HAAS THOMAS DR ,  ARNTZ DIETRICH DR ,  KLENK HERBERT DR ,  GIRKE WALTER

    IPC: C07B61/00 ,  C07C45/52 ,  C07C47/22

    Abstract: A process for the production of acrolein by dehydration of glycerol in the liquid phase or in the gaseous phase, in each case on acidic solid catalysts, is described. Compared with previously known processes, the space-time yield and catalyst service life may be surprisingly increased with higher selectivity by treating a glycerol-water mixture with a glycerol content of 10 to 40 wt. % at 180 DEG to 340 DEG C. (liquid phase) or at 250 DEG to 340 DEG C. (gaseous phase) on a solid catalyst with an Ho value (Hammett acidity function) of less than +2, preferably less than -3.

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