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Reinhold Hornle

Karlheinz Wolf

Hans-Heinz Molls

Konrad Nonn

Jochen Koll

Heinz-Ewald Baurecht

Fritz Bremer

Willy Schiwy

Klaus Walz

Horst Brandt

Vaclav Kaspar

Volker Paulat

Reinhard Nebeling

Gerd Muller

Volker Aign

Hermann Perrey

Norbert Pusch

Ferdinand Hummes

Jurgen Schulze

Hans Rudolph

Hans J Rosenkranz

Alfred Pischtschan

Joachim Wolff

Roland Rupp

Erich Eimers

Hans Schulze

Robert Kuth

Harald Gleinig

Michael Kressner

Bernhard Vosteen

Georg Pape

Bernhard Arnold

Georg Dehmel

Richard Schwaebel

Peter Rasche

Dieter Wiegner

Erich Istel

Hans-Werner Petroll

Rudolf Erdmenger

Erhard Schuffenhauer

Hans Werner Petroll

Jurgen Spille

Jurgen Koerner

Werner Kullick

Hans Unterbirker

Wilhelm Berlenbach

Hans Kunzelmann

Artur Haus

Peter Schulze

Theodor Hild

Harry Orttmann

Joachim Laser

Gottfried Popp

Gottfried Dick

Friedrich Kunert

Vaclay Kaspar

Rainer Skerhut

Richard Buchele

Process for preparing granules of water-insoluble solids, characterized in that a non-thixotropic press or filter cake of the solid is comminuted by cutting and the product obtained is dried while in rolling motion in a dryer for pourable solids.

Process for preparing granules of water-insoluble solids

The lyotropic, liquid-crystalline, aqueous phase of a reactive dyestuff of the formula ##STR1## wherein M.sym. represents H.sym. or an alkali metal cation (preferably Na.sym., K.sym. or Li.sym.) and

Liquid-crystalline phase of an azo reactive dyestuff, and its use for

Leather dyeing agents, which can be obtained by concentrating, by means of a membrane separation process, the mother liquors, which are produced in the salting-out process in the preparation of organic dyestuffs which are water-soluble or which contain groups imparting water-solubility, the mother liquors having an extinction in the absorption maximum which is .gtoreq.500, with a layer thickness of 10 cm, and by drying the concentrate, if appropriate.

Leather dyeing agents and their preparation: membrame separation of dye

Solid formulations of organic dyestuffs, or of optical brighteners, characterized in that they contain a mixture of

Low-dust dyestuff formulations

Dyestuff preparations which are capable of flow and contain (a) at least one dyestuff which is sparingly soluble or insoluble in water, (b) at least one polyester of phthalic acid and a polyalcohol and optionally a monohydric alcohol with 1-18 C atoms and (c) optionally further auxiliaries, and their use for dyeing plastics, in particular polyurethane plastics.

Dyestuff preparations, processes for their production and their use for

Mixed crystals of dyestuffs of the formula I ##STR1## wherein R denotes alkyl and

Dyestuff mixtures, a process for their preparation and a process for

Aqueous dyestuff dispersions containing water-insoluble dyestuffs and water-soluble oxalkylation products which can be obtained by subjecting aromatic compounds containing phenolic OH groups to a condensation reaction with formaldehyde and amines which contain a NH group which is reactive towards formaldehyde, or containing derivatives of such oxalkylation products are suitable for pigmenting natural or synthetic materials.

Aqueous dyestuff or pigment dispersions

Process for the preparation of water-soluble dyestuffs with a low salt content, characterized in that the water-soluble dyestuffs are salted out from their aqueous solutions and/or dispersions by adding salts which are volatile at temperatures of about 40.degree. C. to about 250.degree. C. under a pressure of about 10 mm Hg to about 760 mm Hg, the dyestuffs are isolated and the volatile salts are volatilized during the drying process.

Process for the preparation of water-soluble dyestuffs with a low salt

Highly concentrated liquid preparations of disperse dyestuffs are obtained with a low consumption of energy by first adding a dispersing agent to the water-moist dyestuff press-cake to convert it into a form in which it is capable of flow, subjecting this product to wet grinding and increasing the dyestuff content of the resulting, insufficiently concentrated dispersion in a second step by means of a membrane separation process, for example pressure permeation.

Process for producing liquid dyestuff preparations

Chemical reaction products, obtained in an alkaline medium and which require the addition of a dispersing agent, are neutralized by addition of a free surface-active acid to which, after its preparation, basic agents have not been added or have only been added up to a pH value of 3.

Process for the neutralization of basic reaction compositions

Liquid finished formulations which are stable to storage and hydrolysis and are based on the lyotropic liquid crystal aqueous phase of the dyestuff of the formula ##STR1## which is present in water in a concentration of 23-35% at room temperature, are outstandingly suitable for the preparation of dyebaths and printing pastes for dyeing cotton, wool, regenerated cellulose, paper and leather.

Liquid crystal phase of an azo reactive dyestuff and its use for dyeing

Liquid finished formulations which are stable to storage and hydrolysis and are based on the lyotropic liquid crystal aqueous phase of the dyestuff of the formula ##STR1## in water in a concentration of 12-35% at room temperature are outstandingly suitable for the preparation of dyebaths and printing pastes for dyeing cotton, wool, regenerated cellulose, paper and leather.

The invention relates to the preparation of pulverulent formulations of transfer printing dyestuffs. The process is characterized in that the aqueous dispersions of these dyestuffs are mixed with compounds of the formula

Process for the preparation of dyestuff formulations

Process for the production of granular mixtures of vat dyestuffs and/or disperse dyestuffs, characterized in that liquid or pasty, finished formulations of two or more vat dyestuffs and/or disperse dyestuffs are spray-dried together to form granules.

Granular preparation of vat dyestuffs and/or disperse dyestuffs

Dyestuff formulations which contain anionic, water-soluble dyestuffs or developable dyestuffs and salts of diaryl ether-sulphonic acids are suitable for the preparation of padding liquors, dyebaths and printing pastes.

Dyestuff formulations containing salts of diaryl ether sulfonic acids

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Cologne, Germany

Reinhold Hornle