公开(公告)号：DE59303861D1

公开(公告)日：1996-10-24

申请号：DE59303861

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.

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.

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.

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.

公开(公告)号：IN180008B

公开(公告)日：1998-01-10

申请号：IN612CA1993

申请日：1993-10-14

Applicant: DEGUSSA

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

IPC: C07B35/06 ,  C07C29/15

公开(公告)号：BR9304714A

公开(公告)日：1994-08-09

申请号：BR9304714

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 ,  C07C45/52 ,  C07C47/22 ,  C07C45/66

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.

公开(公告)号：DE19504283A1

公开(公告)日：1996-08-14

申请号：DE19504283

申请日：1995-02-09

Applicant: DEGUSSA

Inventor： HIPPEL LUKAS V DR ,  NEHER ARMIN DR ,  ARNTZ DIETRICH DR

IPC: B01J23/18 ,  B01J23/22 ,  B01J35/10 ,  B01J37/08 ,  C07B61/00 ,  C07D213/84 ,  C07D213/85

Abstract: A catalyst for the reaction of methylpyridines with ammonia and oxygen to give the corresp. cyanopyridines consists of cpds. of Sb, V, Ti and O with the general formula SbaVbTicX dX eOf (I) X = Si derived from the highly disperse SiO2 and layer lattice silicate(s) (II) used in the prodn. of (I); X = alkali metal(s); a = 3-10; b = 0.5-2; c = 3-10; d = 2-20; e = 0.01-2; f = no. of atoms required for stoichiometric satn. of the other components. Also claimed is (i) a process for the prodn. of catalysts (I); (ii) a process for the prodn. of cyanopyridines from the corresp. methylpyridines using (I) as catalyst.

公开(公告)号：ES2086850T3

公开(公告)日：1996-07-01

申请号：ES93116791

申请日：1993-10-18

Applicant: DEGUSSA

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

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

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.

公开(公告)号：AT137729T

公开(公告)日：1996-05-15

申请号：AT93116791

申请日：1993-10-18

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

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.

公开(公告)号：DE4238492C2

公开(公告)日：1995-06-14

申请号：DE4238492

申请日：1992-11-14

Applicant: DEGUSSA

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

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

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.