Bayer Aktiengesellschaft

Bruno Kruger

Horst Behre

Adolf Winkler

Guido Steffan

Wilhelm Goyert

Wolfgang Grimm

Hans Wagner

Erich Hammerschmidt

Albert Awater

Gunter Hentze

Albert Hullen

The instant invention is directed to thermoplastic chemical material comprising:

Reinforced polyurethane thermoplastic chemical materials and processes

The invention relates to a process for the preparation of 1-benzoylamino-8-hydroxynaphthalene-4,6-disulphonic acid (benzoyl-K acid) by reacting 1-amino-8-hydroxynaphthalene-4,6-disulphonic acid (K acid) with benzoylating agents, according to which process mixtures of aminonaphtholdisulphonic acid isomers are used instead of pure K acid, which mixtures contain over 40% by weight of K acid, relative to the total amount of diazotizable compounds in the mixture of isomers, and in which no other single isomer has a proportion which exceeds 10% by weight of the total amount of diazotizable compounds in the mixture of isomers.

Process for the preparation of

The invention relates to a process for the preparation of nitroanilines by the reaction of chloronitrobenzenes with ammonia at elevated temperature and under elevated pressure, and in the presence of chlorinated aromatic hydrocarbons. Nitroanilines are important precursors and intermediate products for the preparation of dyestuffs, pharmaceuticals and plant protection agents.

Process for the preparation of nitroanilines

The invention relates to a process for the preparation of 1-amino-8-naphthol-3,6-disulphonic acid (H-acid) as the mono-alkali metal salt from napthylamine-trisulphonic acid isomer mixtures by alkaline hydrolysis under pressure. The separation of the H-acid is effected by utilizing an aqueous sulphuric acid which contains naphthalene- and/or nitronaphthalene- and/or naphthylamine- and/or naphthol- and/or aminonaphthol-mono-, -di-and/or-tri-sulphonic acids.

Process for the preparation of 1-amino-8-naphthol-3,6-disulphonic acid

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Cologne, Germany

Bruno Kruger