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    PROCESS FOR THE PREPARATION OF 2-AMINO-3-CHLOROBENZOIC ACID
    2.
    发明专利
    PROCESS FOR THE PREPARATION OF 2-AMINO-3-CHLOROBENZOIC ACID 未知

    公开(公告)号：CA2076142A1

    公开(公告)日：1993-02-17

    申请号：CA2076142

    申请日：1992-08-14

    Applicant: HOECHST AG

    Inventor： PAPENFUHS THEODOR ,  RAPP JOCHEN

    IPC: B01J27/122 ,  C07B61/00 ,  C07C227/08 ,  C07C229/56

    Abstract: HOE 91/F 252 of the disclosure: Process for the preparation of 2-amino-3-chlorobenzoic acid The present invention relates to a process for the preparation of 2-amino-3-chlorobenzoic acid by dissolving 1 mol of 2,3-dichlorobenzoic acid in about 400 to about 2000 parts of water with at least the equimolar amount of an alkali metal hydroxide or with an aqueous solution of the equimolar amount of an alkali metal hydroxide, and subsequently reacting it with about 500 to about 2500 mol % of ammonia at temperatures of about 150.degree. to about 220.degree.C in the presence of copper bronze, copper(I) salts and/or copper(II) salts.

    Wholly aromatic polyamides, preparation thereof and shaped structures therefrom
    3.
    发明专利
    Wholly aromatic polyamides, preparation thereof and shaped structures therefrom 未知

    公开(公告)号：IE910515A1

    公开(公告)日：1991-08-28

    申请号：IE51591

    申请日：1991-02-14

    Applicant: HOECHST AG

    Inventor： KEIL GUENTER ,  HESS REINER ,  RAPP JOCHEN

    IPC: C08G69/32 ,  C08G69/40 ,  C08G69/42 ,  C08J5/18 ,  D01F6/60 ,  D01F6/80 ,  C08J5/22

    Abstract: Aromatic copolyamides are described, which are soluble in organic amide solvents. The polymers are composed to at least 95 mol % of repeat structural units A: -OC-AR-CO- B: -HN-Ar'-NH- C: -HN-Ar''-NH- in the combinations A+B+C+D, or A+C+D+E and up to 5 mol % of m-bond-containing structural units F and/or G derived from aromatic dicarboxylic acids (F') and/or from aromatic diamines (G'), the sum total of the mole fractions of structural units A+F and the sum total of the mole fractions of the structural units of B+C+D+E+G being essentially the same, -Ar- and -Ar'- are divalent aromatic radicals whose C-N valence bonds are in a para-position or in a similar coaxial or parallel position and which may be substituted by one or two inert radicals, such as lower alkykl or halogen, is a trivalent aromatic radical which after removal of the -SO2R group has the same meaning as -Ar- or -Ar'- or else is the structural unit wehre X is -O-, -NHCO-, -SO2- or -CO-, -R is lower alkyl and -R' is lower alkyl or alkoxy, and the proportions of the diamine components B, C, D and E are within the following limits: B: 25-47.5 mol % C: 7.5-30 mol D: 45-67.5 mol and E: 20-40 mol.

    Process for the preparation of 2-amino-3-chlorobenzoic acid
    4.
    发明专利
    Process for the preparation of 2-amino-3-chlorobenzoic acid 未知

    公开(公告)号：AU648923B2

    公开(公告)日：1994-05-05

    申请号：AU2100892

    申请日：1992-08-14

    Applicant: HOECHST AG

    Inventor： PAPENFUHS THEODOR ,  RAPP JOCHEN

    IPC: B01J27/122 ,  C07B61/00 ,  C07C227/08 ,  C07C229/56 ,  C07C229/38

    Abstract: The present invention relates to a process for the preparation of 2-amino-3-chlorobenzoic acid by dissolving 1 mol of 2,3-dichlorobenzoic acid in about 400 to about 2000 parts of water with at least the equimolar amount of an alkali metal hydroxide or with an aqueous solution of the equimolar amount of an alkali metal hydroxide, and subsequently reacting it with about 500 to about 2500 mol % of ammonia at temperatures of about 150 DEG to about 220 DEG C. in the presence of copper bronze, copper(I) salts and/or copper(II) salts.

    6.
    发明专利
    未知

    公开(公告)号：PT96772A

    公开(公告)日：1991-10-31

    申请号：PT9677291

    申请日：1991-02-14

    Applicant: HOECHST AG

    Inventor： KEIL GUNTER ,  HESS REINER ,  RAPP JOCHEN

    IPC: C08G69/32 ,  C08G69/40 ,  C08G69/42 ,  C08J5/18 ,  D01F6/60 ,  D01F6/80 ,  C08G69/00

    Abstract: Aromatic copolyamides are described, which are soluble in organic amide solvents. The polymers are composed to at least 95 mol % of repeat structural units A: -OC-AR-CO- B: -HN-Ar'-NH- C: -HN-Ar''-NH- in the combinations A+B+C+D, or A+C+D+E and up to 5 mol % of m-bond-containing structural units F and/or G derived from aromatic dicarboxylic acids (F') and/or from aromatic diamines (G'), the sum total of the mole fractions of structural units A+F and the sum total of the mole fractions of the structural units of B+C+D+E+G being essentially the same, -Ar- and -Ar'- are divalent aromatic radicals whose C-N valence bonds are in a para-position or in a similar coaxial or parallel position and which may be substituted by one or two inert radicals, such as lower alkykl or halogen, is a trivalent aromatic radical which after removal of the -SO2R group has the same meaning as -Ar- or -Ar'- or else is the structural unit wehre X is -O-, -NHCO-, -SO2- or -CO-, -R is lower alkyl and -R' is lower alkyl or alkoxy, and the proportions of the diamine components B, C, D and E are within the following limits: B: 25-47.5 mol % C: 7.5-30 mol D: 45-67.5 mol and E: 20-40 mol.

    Wholly aromatic polyamides preparation thereof and shaped structures therefrom
    7.
    发明专利
    Wholly aromatic polyamides preparation thereof and shaped structures therefrom 未知

    公开(公告)号：IE67443B1

    公开(公告)日：1996-04-03

    申请号：IE51591

    申请日：1991-02-14

    Applicant: HOECHST AG

    Inventor： KEIL GUENTER ,  HESS REINER ,  RAPP JOCHEN

    IPC: C08G69/32 ,  C08G69/40 ,  C08G69/42 ,  C08J5/18 ,  D01F6/60 ,  D01F6/80 ,  C08J5/22

    Abstract: Aromatic copolyamides are described, which are soluble in organic amide solvents. The polymers are composed to at least 95 mol % of repeat structural units A: -OC-AR-CO- B: -HN-Ar'-NH- C: -HN-Ar''-NH- in the combinations A+B+C+D, or A+C+D+E and up to 5 mol % of m-bond-containing structural units F and/or G derived from aromatic dicarboxylic acids (F') and/or from aromatic diamines (G'), the sum total of the mole fractions of structural units A+F and the sum total of the mole fractions of the structural units of B+C+D+E+G being essentially the same, -Ar- and -Ar'- are divalent aromatic radicals whose C-N valence bonds are in a para-position or in a similar coaxial or parallel position and which may be substituted by one or two inert radicals, such as lower alkykl or halogen, is a trivalent aromatic radical which after removal of the -SO2R group has the same meaning as -Ar- or -Ar'- or else is the structural unit wehre X is -O-, -NHCO-, -SO2- or -CO-, -R is lower alkyl and -R' is lower alkyl or alkoxy, and the proportions of the diamine components B, C, D and E are within the following limits: B: 25-47.5 mol % C: 7.5-30 mol D: 45-67.5 mol and E: 20-40 mol.

    Process for the preparation of 2-amino-3-chlorobenzoic acid.
    10.
    发明专利
    Process for the preparation of 2-amino-3-chlorobenzoic acid. 未知

    公开(公告)号：ZA926129B

    公开(公告)日：1993-06-14

    申请号：ZA926129

    申请日：1992-08-14

    Applicant: HOECHST AG

    Inventor： RAPP JOCHEN ,  PAPENFUHS THEODOR

    IPC: C07B61/00 ,  B01J27/122 ,  C07C227/08 ,  C07C229/56 ,  C07C

    Abstract: The present invention relates to a process for the preparation of 2-amino-3-chlorobenzoic acid by dissolving 1 mol of 2,3-dichlorobenzoic acid in about 400 to about 2000 parts of water with at least the equimolar amount of an alkali metal hydroxide or with an aqueous solution of the equimolar amount of an alkali metal hydroxide, and subsequently reacting it with about 500 to about 2500 mol % of ammonia at temperatures of about 150 DEG to about 220 DEG C. in the presence of copper bronze, copper(I) salts and/or copper(II) salts.

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