Bayer Aktiengesellschaft

Ulrich Kappler

Alfred Mitschker

Rudolf Sundermann

Udo Birkenstock

Herbert Schmidt

Jurgen Zander

Walter Bohm

Uwe Beck

Helmuth Kritzler

Hans D Winkelmann

Andreas Grafe

By Birgit Hartung-Merse, Heir

Sigurd Hartung, Deceased

In the preparation of chlorinated aromatic amines by reaction of corresponding nitro compounds with hydrogen under pressure, at elevated temperature and in the presence of a solvent and small amounts of a basic compound, fewer by-products are formed by using platinum and nickel and/or cobalt on an active charcoal support.

Process for the preparation of chlorine-substituted aromatic amines

According to the invention, metal halides are removed from liquid organic water-immiscible substances by treating the liquid organic water-immiscible substances which contain the metal halides with a water-containing anion-exchanger in the OH form.

Process for removing metal halides from liquid organic water-immiscible

Halogenated aromatic amines are rendered colorstable by distillation and/or storing in equipment made of a rustproof material such as a Cr/Ni/Mo steel, tin, zinc, enamel, glass and/or ceramic material.

Halogenated aromatic amines which are stable in color, and a process for

Tris-(2-hydroxyaryl) esters of cyanuric acid, useful as cross-linking agents and UV absorbers, of the formula ##STR1## WHEREIN ##STR2## IS AN AROMATIC RADICAL WITH A HYDROXYL GROUP IN THE 2-POSITION TO THE ETHER OXYGEN,

Production of tris-(2-hydroxyaryl) esters of cyanuric acid

Growing community of inventors

Langenfeld, Germany

Ulrich Kappler