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公开(公告)号：DE2516687A1
公开(公告)日：1976-10-28
申请号：DE2516687
申请日：1975-04-16
Applicant: HOECHST AG
Abstract: The novel basic azo dyes free from sulphonic acid gps. are of formula (I): D(+)-N=N-A-NR-CH2-C(Z)=CH2 X(-) (I) (where D(+) is the radical of an aromatic or heterocyclic diazotisation component contg. a quaternary N atom. A is an aromatic radical or with -NR- forms a heterocyclic radical, R is H opt. substd. lower alkyl, or aralkyl or cycloalkyl, X(-) is an anion, Z is H, halogen, or lower alkyl). Used for dyeing/printing of natural or synthetic fibre textiles. (I) may be in powder or liq. form.
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公开(公告)号：DE2065887A1
公开(公告)日：1976-10-21
申请号：DE2065887
申请日：1970-06-18
Applicant: HOECHST AG
IPC: C09B19/00
Abstract: Basic oxazine dyes of formula (I): (in which R is lower alkyl; R1 and R2 are H or lower alkyl opt. substd. with halogen, OH, alkoxy or CN; R3 is H or lower alkyl; X is an anion; ring a is substd. with halogen, alkoxy, aryloxy, alkyl, CF3, NO2, alkyl- or aryl-sulphonyl, mono- or di-alkylamino, arylamino, CN or acyl) are used for dyeing or printing of mordanted cellulose, silk, wool or synthetic fibres, esp. polyacrylonitrile or polyvinylidene cyanide. Clear strong colours are obtained with good light and wet fastness. Insensitive to pH variations in the dye bath and resistant to temps. above 100 degrees C in dyeing. Nitroso cpds. are used in prepn. of the dyes in equimolar amounts instead of at least 50% excess, and easily soluble by-products are formed instead of p-amino diphenylamine. Stronger shades are obtained than from known dyes without substits. in ring a.
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公开(公告)号：DE2345916A1
公开(公告)日：1975-04-10
申请号：DE2345916
申请日：1973-09-12
Applicant: HOECHST AG
Inventor： HAEHNKE MANFRED DIPL CHEM DR , HOHMANN KURT , MUNDLOS EBERHARD DIPL CHEM DR , PAPENFUHS THEODOR DIPL CHEM DR
IPC: C09B1/28 , C09B1/503 , C09B11/10 , C09B11/20 , C09B11/22 , C09B11/26 , C09B11/28 , C09B29/00 , C09B31/02 , C09B67/42 , C09B67/00
Abstract: The dye is either in the form of a dye base or contains a pri- sec- or tert. amino, guanidino or hydrazino gp. and the surfactant is non-ionic or weakly cationic. Stable, concd. prepns. can be obtd. with a very wide range of dyes. They are used, after dilution with aq. acids, for dyeing acrylics acid-modified polyesters and polyamides, mordanted cellulose, silk, acetate rayon, leather and paper.
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公开(公告)号：DE2461432A1
公开(公告)日：1976-07-08
申请号：DE2461432
申请日：1974-12-24
Applicant: HOECHST AG
Inventor： MUNDLOS EBERHARD DIPL CHEM DR , MISCHKE PETER DIPL CHEM DR , FLECKENSTEIN ERWIN DIPL CHEM D , MOHR REINHARD DIPL CHEM DR , HOHMANN KURT
Abstract: The novel basic azo dyes free from sulphonic acid gps. are of formula (I): D(+)-N=N-A-NR-CH2-C(Z)=CH2 X(-) (I) (where D(+) is the radical of an aromatic or heterocyclic diazotisation component contg. a quaternary N atom. A is an aromatic radical or with -NR- forms a heterocyclic radical, R is H opt. substd. lower alkyl, or aralkyl or cycloalkyl, X(-) is an anion, Z is H, halogen, or lower alkyl). Used for dyeing/printing of natural or synthetic fibre textiles. (I) may be in powder or liq. form.
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公开(公告)号：DE2426852A1
公开(公告)日：1976-01-02
申请号：DE2426852
申请日：1974-06-04
Applicant: HOECHST AG
Inventor： BACHMANN WILFRIED DIPL ING , GNABS CHRISTIAN DIPL ING , JANECKA KURT DIPL ING DR , MUNDLOS EBERHARD DIPL CHEM DR , PAPENFUHS THEODOR DIPL CHEM DR , WAESE GERHARD DIPL CHEM DR
Abstract: An improved process for isolating 2-hydroxynaphthalenecarboxylic acids from reaction mixtures of the alkali metal salts of the 2-hydroxynaphthalene with carbon dioxide had been found which comprises diluting with water the reaction mixture which contains the di-alkali metal salt of 2-hydroxynaphthalenecarboxylic acid and 2-hydroxynaphthalene, while keeping the mixture at a temperature of at least 80 DEG C, then adjusting the pH-value to about 6 to 7 by means of aqueous mineral acid, separating the lower phase at at least 80 DEG C, cooling the upper phase to about 15 DEG to 25 DEG C, separating the 2-hydroxynaphthalene, then adjusting the pH-value to about 1 to 2 by means of aqueous mineral acid and isolating the separated 2-hydroxynaphthalenecarboxylic acid. By this novel process, work intensive operations, expensive technical apparatuses which are suspectible to repairs, solvents which do not participate directly in the reaction and therewith complicated regenerations, as known from the present art, are completely avoided. It permits clear and very easy separation of the reaction products at only one and the same stage in the process and allows in advantageous manner continuous operation.
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Patent Agency Ranking
公开(公告)号：DE2426850A1
公开(公告)日：1976-01-02
申请号：DE2426850
申请日：1974-06-04
Applicant: HOECHST AG
Inventor： BACHMANN WILFRIED DIPL ING , GNABS CHRISTIAN DIPL ING , JANECKA KURT DIPL CHEM DR , MUNDLOS EBERHARD DIPL CHEM DR , PAPENFUHS THEODOR DIPL CHEM DR , WAESE GERHARD DIPL CHEM DR
Abstract: 2-Hydroxy-3-naphthoic acid (I) is prepared by reacting carbon dioxide on alkali metal salts of beta-naphthol in the presence of beta-naphthol at high temp. and pressure and the reaction is carried out being subjected to a continuous shearing action in time and space. (I) is an intermediate partic. used in the production of dyes. Previous dry processes have been slow (30-35 hrs) with difficult heat transfer and resinous by-products are formed. The above process reduces the amount of resins formed giving yields of 50-60% based on the alkali metal naphthalate used, also the reaction time is shorter and lower pressures may be used.
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公开(公告)号：DE2753072A1
公开(公告)日：1979-05-31
申请号：DE2753072
申请日：1977-11-29
Applicant: HOECHST AG
Abstract: Prepn. of homogeneous triphenylmethane dyes of formula (I). or the corresp. dye bases (in which R1 is halogen; R2 is lower alkyl; X is an anion), comprises (a) reacting one mol Al or Fe complex of 4,4', 4"-trichloro triphenyl methyl chloride with around 1 mol p-halogen aniline at 110-140 degrees C in presence of inert organic solvent; and (b) acting the prod. with excess aniline substd. with lower alkyl in m- or p-posn. at 135-170 degrees C. The triphenyl methane cpd. obtained is processed in acid or alkaline aq. medium and isolated. Used for sulphonation to produce useful dyes for blue and black printing inks. Neutral blue dyes are obtd. of homogeneous compsn. and high purity, in increased yield and strength.
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公开(公告)号：DE2716246A1
公开(公告)日：1978-10-26
申请号：DE2716246
申请日：1977-04-13
Applicant: HOECHST AG
Inventor： KOLLODZEISKI NORBERT , LOEWENFELD RUDOLF DIPL CHEM DR , MUNDLOS EBERHARD DIPL CHEM DR , MOHR REINHARD DIPL CHEM DR , HOHMANN KURT
IPC: D06P3/76
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公开(公告)号：DE2522175A1
公开(公告)日：1976-11-25
申请号：DE2522175
申请日：1975-05-17
Applicant: HOECHST AG
Inventor： BACHMANN WILFRIED DIPL ING DR , GNABS CHRISTIAN DIPL ING DR , JANECKA KURT DIPL CHEM DR , MUNDLOS EBERHARD DIPL CHEM DR , PAPENFUHS THEODOR DIPL CHEM DR , WAESE GERHARD DIPL CHEM DR
Abstract: 2-Hydroxy-3-naphthoic acid (I) is prepared by reacting carbon dioxide on alkali metal salts of beta-naphthol in the presence of beta-naphthol at high temp. and pressure and the reaction is carried out being subjected to a continuous shearing action in time and space. (I) is an intermediate partic. used in the production of dyes. Previous dry processes have been slow (30-35 hrs) with difficult heat transfer and resinous by-products are formed. The above process reduces the amount of resins formed giving yields of 50-60% based on the alkali metal naphthalate used, also the reaction time is shorter and lower pressures may be used.
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公开(公告)号：DE2553508A1
公开(公告)日：1977-06-02
申请号：DE2553508
申请日：1975-11-28
Applicant: HOECHST AG
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