Basf Aktiengesellschaft

Wolfgang Mach

Horst Scheuermann

Manfred Patsch

Christos Vamvakaris

Peter Thoma

Klaus Borho

Karl K Mayer

Karl-Heinz Sartor

Wolf D Stege

Karl-Heinz Hennicke

Zafirios Grammatis

Ewald Vollmerhaus

A continuous closed-system process for the environmentally friendly drying and purification of benzanthrone which comprises the steps of charging a benzanthrone-containing paste of pumpable consistency onto a melt held in a stirred kettle, dewatering and melting the paste by means of steam, condensing the water vapor emerging from the stirred kettle, flaking the melt from the stirred kettle by means of a rotating drum, and packaging the flaked solids.

Drying and purification of benzanthrone

Compounds of the general formula I ##STR1## where B.sup.2 and B.sup.2 independently of one another are hydrogen, C.sub.1 -C.sub.6 -alkyl which may or may not be interrupted by oxygen or sulfur and is unsubstituted by hydroxyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -alkylmercapto, cyano, phenylmercapto (which is unsubstituted by chorine or methyl), unsubstituted or substituted carbamoyl or a carboxylic acid ester group, benzyl or phenylethyl which are unsubstituted or substituted in the ring by chlorine, bromine, methyl, ethyl, methoxy or ethoxy, phenyl which is unsubstituted or substituted by chlorine, bromine, hydroxyl, methoxy, ethoxy, methyl, C.sub.1 -C.sub.4 -alkylmercapto, C.sub.1 -C.sub.4 -alkanoylamino or amino, unsubstituted or substituted carbamoyl or a carboxylic acid ester group,

Thiazole containing coumarin compounds

Dyes of the formula ##STR1## wherein A is --O--, --S-- or --CH=CH-- and X and Z are substituents, obtained from the corresponding 2-iminocoumarines by reaction with a compound of the formula ##STR2## The dyes give brilliant yellow to red shades on textile material, particularly polyesters and acrylonitrile polymers.

Fluorescent dyes

6-N-triazinylaminobenzofurans and their production. The compounds are suitable for the optical brightening of natural and synthetic fibers and also of plastics materials, particularly of polyamides, cellulose esters, polyesters and acrylonitrile polymers.

6-Triazinylaminobenzofurans

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Hockenheim, Germany

Wolfgang Mach