公开(公告)号：JPH11209361A

公开(公告)日：1999-08-03

申请号：JP31456098

申请日：1998-11-05

Applicant: DEGUSSA

Inventor： HAAS THOMAS DR ,  BURKHARDT OLAF DR ,  MORAWIETZ MARCUS DR ,  VANHEERTUM RUDOLF DR ,  BOURREL AGNES

IPC: C07D307/20 ,  C07B35/06 ,  C07C20060101 ,  C07C41/09 ,  C07C43/18 ,  C07D307/06 ,  C07D307/08 ,  C07D309/04 ,  C07D493/04 ,  C07H1/00 ,  C07H3/00

Abstract: PROBLEM TO BE SOLVED: To provide a method for producing a five or six-membered cyclic ether, capable of producing the dehydrogenative cyclization product containing a polymer in an amount of only

公开(公告)号：DE59812920D1

公开(公告)日：2005-08-18

申请号：DE59812920

申请日：1998-10-23

Applicant: DEGUSSA

Inventor： HAAS THOMAS DR ,  BURKHARDT OLAF DR ,  MORAWIETZ MARCUS DR ,  VANHEERTUM RUDOLF DR ,  BOURREL AGNES

IPC: C07D307/20 ,  C07B35/06 ,  C07C20060101 ,  C07C41/09 ,  C07C43/18 ,  C07D307/06 ,  C07D307/08 ,  C07D309/04 ,  C07D493/04 ,  C07H1/00 ,  C07H3/00

Abstract: Process for producing 5- or 6-membered cyclic ethers (anhydropolyols) comprises subjecting polyols having at least 4 C atoms and at least 2 OH groups to cyclodehydration at at least 100 degrees C in the presence of water, an acid catalyst, an acid-stable hydrogenation catalyst and hydrogen. Preferably the reaction temperature is 100-380 degrees C, preferably 180-280 degrees C. The H2 pressure is 1-20 MPa, preferably 3-10 MPa. The hydrogenation catalyst comprises Ru, Rh, Pd and/or Pt as metals or metal compounds. The hydrogenation catalyst is used in an amount of 0.001-10 (preferably 0.01-1) wt.% based on the polyol. The acid catalyst is a 1-10C aliphatic carboxylic acid, preferably formic, acetic or propionic acid. The acid catalyst is used in an amount of 0.1-20 (especially 0.5-10) wt.% based on the polyol. The polyol is a tetritol, pentitol or hexitol.

公开(公告)号：BR9804474A

公开(公告)日：2000-02-29

申请号：BR9804474

申请日：1998-11-06

Applicant: DEGUSSA

Inventor： HAAS THOMAS DR ,  BURKHARDT OLAF DR ,  MORAWIETZ MARCUS DR ,  WANHEERTUM RUDOLF DR ,  BOURREL AGNES

IPC: C07D307/20 ,  C07B35/06 ,  C07C20060101 ,  C07C41/09 ,  C07C43/18 ,  C07D307/06 ,  C07D307/08 ,  C07D309/04 ,  C07D493/04 ,  C07H1/00 ,  C07H3/00

Abstract: Process for producing 5- or 6-membered cyclic ethers (anhydropolyols) comprises subjecting polyols having at least 4 C atoms and at least 2 OH groups to cyclodehydration at at least 100 degrees C in the presence of water, an acid catalyst, an acid-stable hydrogenation catalyst and hydrogen. Preferably the reaction temperature is 100-380 degrees C, preferably 180-280 degrees C. The H2 pressure is 1-20 MPa, preferably 3-10 MPa. The hydrogenation catalyst comprises Ru, Rh, Pd and/or Pt as metals or metal compounds. The hydrogenation catalyst is used in an amount of 0.001-10 (preferably 0.01-1) wt.% based on the polyol. The acid catalyst is a 1-10C aliphatic carboxylic acid, preferably formic, acetic or propionic acid. The acid catalyst is used in an amount of 0.1-20 (especially 0.5-10) wt.% based on the polyol. The polyol is a tetritol, pentitol or hexitol.

公开(公告)号：PL329550A1

公开(公告)日：1999-05-10

申请号：PL32955098

申请日：1998-11-05

Applicant: DEGUSSA

Inventor： HAAS THOMAS ,  BURKHARDT OLAF ,  MORAWIETZ MARCUS ,  VANHEERTUM RUDOLF ,  BOURREL AGNES

IPC: C07D307/20 ,  C07B35/06 ,  C07C20060101 ,  C07C41/09 ,  C07C43/18 ,  C07D307/06 ,  C07D307/08 ,  C07D309/04 ,  C07D493/04 ,  C07H1/00 ,  C07H3/00

Abstract: Process for producing 5- or 6-membered cyclic ethers (anhydropolyols) comprises subjecting polyols having at least 4 C atoms and at least 2 OH groups to cyclodehydration at at least 100 degrees C in the presence of water, an acid catalyst, an acid-stable hydrogenation catalyst and hydrogen. Preferably the reaction temperature is 100-380 degrees C, preferably 180-280 degrees C. The H2 pressure is 1-20 MPa, preferably 3-10 MPa. The hydrogenation catalyst comprises Ru, Rh, Pd and/or Pt as metals or metal compounds. The hydrogenation catalyst is used in an amount of 0.001-10 (preferably 0.01-1) wt.% based on the polyol. The acid catalyst is a 1-10C aliphatic carboxylic acid, preferably formic, acetic or propionic acid. The acid catalyst is used in an amount of 0.1-20 (especially 0.5-10) wt.% based on the polyol. The polyol is a tetritol, pentitol or hexitol.

公开(公告)号：MY119822A

公开(公告)日：2005-07-29

申请号：MYPI9805010

申请日：1998-11-04

Applicant: DEGUSSA

Inventor： HAAS THOMAS DR ,  BURKHARDT OLAF DR ,  MORAWIETZ MARCUS DR ,  VANHEERTUM RUDOLF DR ,  BOURREL AGNES

IPC: C07D307/06 ,  C07D307/20 ,  C07B35/06 ,  C07C20060101 ,  C07C41/09 ,  C07C43/18 ,  C07D307/08 ,  C07D309/04 ,  C07D493/04 ,  C07H1/00 ,  C07H3/00

Abstract: FIVE-MEMBERED OR SIX-MEMBERED CYCLIC ETHERS, IN PARTICULAR ANHYDROPOLYOLS, CAN BE OBTAINED BY CYCLODEHYDRATION OF POLYOLS HAVING AT LEAST 4 C ATOMS AND AT LEAST 2 HYDROXYL GROUPS IN THE PRESENCE OF WATER AND AN ACIDIC CATALYST. ACCORDING TO THE INVENTION THE CYCLODEHYDRATION IS PROMOTED AND THE FORMATION OF POLYMERS IS AVOIDED IF THE ACID-CATALYSED CYCLODEHYDRATION IS CARRIED OUT IN THE PRESENCE OF AN ACID-STABLE HYDROGENATING CATALYST IN A HYDROGEN ATMOSPHERE. ANHYDROHEXITOLS CAN BE OBTAINED BOTH FROM HEXITOLS AND FROM SUCROSE.

公开(公告)号：DE19749202C1

公开(公告)日：1999-05-27

申请号：DE19749202

申请日：1997-11-07

Applicant: DEGUSSA

Inventor： HAAS THOMAS DR ,  BURKHARDT OLAF DR ,  MORAWIETZ MARCUS DR ,  VANHEERTUM RUDOLF DR ,  BOURREL AGNES

IPC: C07D307/20 ,  C07B35/06 ,  C07C20060101 ,  C07C41/09 ,  C07C43/18 ,  C07D307/06 ,  C07D307/08 ,  C07D309/04 ,  C07D493/04 ,  C07H1/00 ,  C07H3/00

Abstract: Process for producing 5- or 6-membered cyclic ethers (anhydropolyols) comprises subjecting polyols having at least 4 C atoms and at least 2 OH groups to cyclodehydration at at least 100 degrees C in the presence of water, an acid catalyst, an acid-stable hydrogenation catalyst and hydrogen. Preferably the reaction temperature is 100-380 degrees C, preferably 180-280 degrees C. The H2 pressure is 1-20 MPa, preferably 3-10 MPa. The hydrogenation catalyst comprises Ru, Rh, Pd and/or Pt as metals or metal compounds. The hydrogenation catalyst is used in an amount of 0.001-10 (preferably 0.01-1) wt.% based on the polyol. The acid catalyst is a 1-10C aliphatic carboxylic acid, preferably formic, acetic or propionic acid. The acid catalyst is used in an amount of 0.1-20 (especially 0.5-10) wt.% based on the polyol. The polyol is a tetritol, pentitol or hexitol.