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    PROCESS FOR THE PREPARATION OF 2-AMINO-3-CHLOROBENZOIC ACID
    51.
    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.

    PROCESS FOR THE PREPARATION OF ALKYL NITROBENZOATES
    54.
    发明专利
    PROCESS FOR THE PREPARATION OF ALKYL NITROBENZOATES 未知

    公开(公告)号：CA2015439A1

    公开(公告)日：1990-10-26

    申请号：CA2015439

    申请日：1990-04-25

    Applicant: HOECHST AG

    Inventor： PAPENFUHS THEODOR ,  HESS REINER ,  FUSS ANDREAS

    IPC: B01J31/02 ,  C07B61/00 ,  C07C201/12 ,  C07C205/57

    Abstract: - 1 - HOE 89/F 131 : Process for the preparation of alkyl nitrobenzoates A process for the preparation of alkyl (C1-C3) nitrobenzoates by reacting the nitrobenzoic acid to be esterified with an excess of about 300 to about 600 mol % of an alkanol (C1-C3) in a solvent which is inert towards the starting compounds and the reaction product in the presence of a polyfluoroalkanesulfonic acid of the general formula (1) Y(CnF2n)SO3H (1) in which Y is a hydrogen or fluorine atom, with the proviso that, if Y is H, this hydrogen atom is in the .beta.position relative to the sulfo group, or the hydrate thereof as catalyst in an amount of about 0.1 to about 20 mol %, relative to the nitrobenzoic acid used, at temperatures from about 60 to about 120.degree.C.

    PROCESS FOR THE PREPARATION OF OXETHYLSULFONYL-BENZALDEHYDES
    55.
    发明专利
    PROCESS FOR THE PREPARATION OF OXETHYLSULFONYL-BENZALDEHYDES 未知

    公开(公告)号：IN166884B

    公开(公告)日：1990-08-04

    申请号：IN727CA1988

    申请日：1988-08-31

    Applicant: HOECHST AG

    Inventor： PAPENFUHS THEODOR

    IPC: C07B61/00 ,  B01J23/30 ,  C07C51/285 ,  C07C67/00 ,  C07C313/00 ,  C07C315/02 ,  C07C317/00 ,  C07C317/22 ,  C07C317/24 ,  C07C317/44 ,  C07C319/14 ,  C07C323/19 ,  C07C323/22 ,  C07C323/62 ,  C07C147/103

    Abstract: Hydroxyethylmercaptobenzaldehydes and oxidation products thereof of the formula (I) … … in which R denotes a hydrogen, fluorine, chlorine, bromine or iodine atom, m denotes the number 0 to 2, n the number 1 or 2 and p the number 0 or 1, with the proviso that p is 0 if m is 0 and the side chain -S(O)m-CH2-CH2-OH is in the ortho and/or para position relative to the aldehyde or carboxyl group, are prepared by condensing 1 mol of a halobenzaldehyde of the formula (II) … … in which R, X, Y and Z represent hydrogen, fluorine, chlorine, bromine or iodine atoms, with the proviso that R, X, Y and Z together can be 1, 2 or 3 halogen atoms, in which R is a halogen atom if R, X, Y and Z together are 3 halogen atoms, in aqueous medium with about 1.0 to 1.5 mol of mercaptoethanol (per halogen atom to be exchanged) in the presence of acid-binding agents at about 70 DEG C to about 150 DEG C to give the hydroxyethylmercaptobenzaldehydes, which are then oxidised to the hydroxyethylsulphonylbenzoic acids using at least the amount of hydrogen peroxide required in each case at about 40 DEG C to about 110 DEG C in the presence of a tungsten(VI) compound as the catalyst.

    PROCESS FOR THE PRODUCTION OF HIGH-PURITY TETRACHLORO-1,4-BENZOQUINONE
    56.
    发明专利
    PROCESS FOR THE PRODUCTION OF HIGH-PURITY TETRACHLORO-1,4-BENZOQUINONE 未知

    公开(公告)号：IN166876B

    公开(公告)日：1990-07-28

    申请号：IN43CA1988

    申请日：1988-01-18

    Applicant: HOECHST AG

    Inventor： ARNDT OTTO ,  PAPENFUHS THEODOR

    IPC: C07C50/24 ,  C07C37/62 ,  C07C45/00 ,  C07C46/00 ,  C07C46/06 ,  C07C67/00 ,  C07C50/04

    Abstract: A process for the preparation of high-purity tetrachloro-1,4-benzoquinone by the action of hydrogen peroxide and hydrochloric acid on hydroquinone, which comprises causing 3.8 top 4.2 times the molar quantity of 30 to 37% hydrochloric acid and 1.9 to 2.1 times the molar quantity of 50 to 35% hydrogen peroxide, to act at 5 to 50 DEG C. on 1 mole of hydroquinone in at least 12 times the molar quantity of 30 to 37% hydrochloric acid, then heating the resulting suspension, which essentially contains 2,5-dichlorohydroquinone, to 45 to 55 DEG C. and again causing to act on it, at 50 to 95 DEG C., 3.8 to 4.2 times the molar quantity of 30 to 37% hydrochloric acid and 1.9 to 2.1 times the molar quantity of 50 to 35% hydrogen peroxide, in each case based on the hydroquinone used, and finally adding to the suspension, which is now essentially composed of trichloro-1,4-benzoquinone, 1.9 to 2.1 times the molar quantity of hydrochloric acid of the said concentration range, and 0.95 to 1.05 times the molar quantity of hydrogen peroxide of the said concentration range, in each case based on the hydroquinone used, at 95 to 115 DEG C., sufficiently slowly for no chlorine to escape.

    58.
    发明专利
    未知

    公开(公告)号：BR8108010A

    公开(公告)日：1982-09-21

    申请号：BR8108010

    申请日：1981-12-09

    Applicant: HOECHST AG

    Inventor： ARNDT OTTO ,  PAPENFUHS THEODOR ,  TRONICH WOLFGANG

    IPC: C07C261/04 ,  C07C261/00 ,  C07C273/06 ,  C07C275/30 ,  C07C127/19 ,  C07D207/26

    Abstract: Compounds of the formula I in which X denotes hydrogen, fluorine, chlorine or bromine, Y and Z denote hydrogen, lower alkyl or lower alkoxy, M denotes sodium, potassium or one equivalent of calcium and L denotes a dipolar aprotic solvent, are obtained from compounds of the formula II in which X, Y and Z have the abovementioned meanings, and a metal cyanamide of the formula III M2N-CN in which M has the abovementioned meaning, in a dipolar aprotic solvent, which after the reaction is substantially removed, whereupon a lower molecular weight aliphatic alcohol is added to the residue and the product precipitated is isolated. Nitrophenylureas of the formula IV in which X, Y and Z have the abovementioned meanings, are obtained from the compounds of the formula I by acid hydrolysis.

    METAL-CONTAINING DISAZOMETHINE COMPOUNDS, PROCESS FOR PREPARING THEM AND THEIR USE AS COLORANTS
    59.
    发明专利
    METAL-CONTAINING DISAZOMETHINE COMPOUNDS, PROCESS FOR PREPARING THEM AND THEIR USE AS COLORANTS 未知

    公开(公告)号：CA1089869A

    公开(公告)日：1980-11-18

    申请号：CA258057

    申请日：1976-07-29

    Applicant: HOECHST AG

    Inventor： PAPENFUHS THEODOR ,  VOLK HEINRICH

    IPC: C08K5/00 ,  C08K5/29 ,  C08L1/00 ,  C08L7/00 ,  C08L21/00 ,  C08L23/00 ,  C08L27/00 ,  C08L101/00 ,  C09B55/00 ,  C09D11/00 ,  C09D11/02 ,  D01F1/06 ,  D06P1/13

    Abstract: New metal-complex disazomethine compounds of the formulae (Ia) (Ib ) (Ic) wherein A is a straight-chain or branched alkylene radical, which may be interrupted by one or more moieties selected from the group of hetero atoms, bivalent groups and isocyclic rings, or is a cycloalkylene radical or an arylene radical, R is a covalent bond or is defined as A, Z as a group capable of forming a metal complex is an -O-, -COO- or lower alkoxy group, or an amino group optionally substituted by lower alkyl or aryl, or a carboxylic acid (C1 to C?) alkyl ester group, or Z stands for a carbonamide group or for a sulfonic acid amide radical optionally substituted at one or two nitrogen atoms by alkyl or aryl groups, and X is a carboxylic acid group, carboxylic acid ester group, an optionally substituted carboxylic acid amide or carboxylic acid hydrazide group and M is a bivalent copper, cobalt, nickel, zinc or manganese atom, have boon found which are suitable as colorants, especially as pigments, for example, for coloring plastic masses, paints, lacquers, for the use in spin-dyeing of viscose and cellulose acetate, for coloring printing pastes in graphic industry and paper masses, and have a high tinctorial strength, a good transparency, pure shades, excellent fastness to migration, to over-varnishing to light, to weather, to solvents and to heat, corresponding to the material colored with them.

    PERINONE COMPOUNDS, PROCESS FOR PREPARING THEM AND THEIR USE AS DYES
    60.
    发明专利
    PERINONE COMPOUNDS, PROCESS FOR PREPARING THEM AND THEIR USE AS DYES 未知

    公开(公告)号：CA1082832A

    公开(公告)日：1980-07-29

    申请号：CA236904

    申请日：1975-10-02

    Applicant: HOECHST AG

    Inventor： PAPENFUHS THEODOR ,  TROESTER HELMUT

    IPC: C07D221/14 ,  C07D471/06 ,  C08K5/3437 ,  C09B5/32 ,  C09B57/12 ,  D06P1/00 ,  C08K5/34

    Abstract: The invention is a process for colouring a substance which comprises incorporating into the substance a pigment which is a perinone compound of the general formula (I) in which A represents an ortho- or peri-arylene radical selected from the benzene, napthalene or anthracene series or a 5- or 6-membered heterocyclic radical containing 1 or 2 nitrogen atoms, and X represents hydrogen or a direct bond or a straight or branched alkylene of 1 to 6 carbon atoms, a vinylene radical or a bridging member of the formula -CO-, -CONH-, -NH-CO-NH-, -CO-?-CO-, -NH-CO-NH-CO-, -CONH-Y-NHCO-, -NHCO-Y-CONH n represents the number 1 or 2 and m = 1 if n = 1, and m = 0 if n = 2, R represents hydrogen or lower alkyl and Y represents lower alkylene or phenylene.

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