Sachtleben Pigment Gmbh

Bayer Aktiengesellschaft

Tronox Pigments Gmbh

Amateq Holding Gmbh

Kerr-mcgee Pigments International Gmbh

Crenox Gmbh

Venator Uerdingen Gmbh

Jung, Ralf P.

Huntsman P&a Uerdingen Gmbh

Kehrmann, Alexander

Kerr-mcgee Pigments Gmbh

Gerhard Auer

Werner Schuy

Ulrich Meisen

G&uuml;nter Lailach

Frank Hipler

Horst Günnel

Benno Laubach

Bernd Proft

Hans Kungl

Ralf Becker

Alexander Kehrmann

Christian Adam

Klaus Köllisch

Frank Wittekopf

Udo Julius

Dirk Stolle

Nicole Galbarczyk

Werner Bahl

Jan Hohlmann

Philip Reese

Kai-Sven Lange

Holger Eickhaus

Horst Guennel

Maurits Van Den Berg

Michael J Hoffman

Uwe Dörschug

Susanne Wagner

Anna Röttger

Martin Offermann

Dieter Völtzke

Harald Schwarz

Hans-Peter Abicht

Carsten Nass

Erwin Weiss

Christopher Hamann

Berndt-Ullrich Köhler

Michael Vössing

Jochen Winkler

Detlef Klein

Dirk Weber

Marc Harwardt

Berndt Proft

Armin Reller

Michael J Hoffmann

Hipler Frank

Ralf P Jung

Jürgen Pieper

Christine Leipnitz

Emanuela Sgreccia

Maria Luisa Di Vona

The present application relates to a process for the purification of waste materials or industrial by-products, the process comprising the steps of: a) Preparing a composition (C) by blending or mixing waste materials or industrial by-products comprising chlorine (B) with one or more materials comprising heavy metals (HM) b) Reacting (B) and (HM) by thermal treatment of (C) c) Separating evaporated heavy metal chloride compounds (HMCC) d) Obtaining a solid material after the thermal treatment step.

Process for the purification of waste materials or industrial by-products comprising chlorine

A method for granulating a particle-containing material from an industrial process includes mixing the particle-containing material in the presence of water with a material that consists of or comprises a water-absorbing and swellable organic polymer compound which is insoluble in water so as to obtain granulates.

Method for granulating particle-containing material obtained from industrial processes, the granulate thus produced, and use thereof

A composition that comprises a titanium compound, an iron compound, and a tungsten compound, wherein the titanium compound has a microcrystalline anatase structure and/or is obtained in the production of TiO2 according to the sulphate process, during hydrolysis of a solution which contains titanyl sulphate, and also in that the composition has a vanadium content, calculated as V, of less than 0.15 wt. % in relation to the solids content of the composition. A catalyst or catalyst raw material containing the claimed composition, as well as to a dimensionally stable and catalytically active solid body can be obtained by mixing the composition defined above with binders, plasticisers and optionally, further additives, molding the obtained composition preferably by extrusion, and subsequently carrying out calcination, or by providing a dimensionally stable and catalytically active solid body that can be obtained by applying the composition, optionally together with binders, plasticisers and further additives, to a substrate, and subsequently carrying out calcination.

Raw materials for vanadium-free or vanadium-reduced denox catalysts, and method for producing same

A composition includes titanium dioxide-containing digestion residue from titanium dioxide production, and at least one further component which is catalytically active. Dimensionally stable, catalytically active solids which are obtained from this composition can be used as catalyst, for example for minimizing nitrogen oxides.

Supported catalyst of digestion residues of titanyl sulphate-containing black solution

A composition containing titanium and iron compounds, in particular decomposition residue that accumulates as a production residue after the sulphate process during the production of titanium dioxide, is used as an adsorbing agent for inorganic and organic compounds, for example compounds containing phosphorus, arsenic, antimony, sulphur, selenium, tellurium, the cyano group or heavy metal. Toxic substances and pollutants may be removed from a fluid using the adsorbing agent.

Adsorbing agent containing titanium and iron compounds

The invention relates to fine-particulate zirconium titanates or lead zirconium titanates and a method for production thereof by reaction of titanium dioxide particles with a zirconium compound or a lead and zirconium compound. The titanium dioxide particles have a BET surface of more than 50 m/g. The lead zirconium titanates can be used for the production of microelectronic components.

Fine-particulate lead zirconium titantes zirconium titanate hydrates and zirconium titanates and method for production thereof

The invention relates to fine-particled alkaline-earth titanates and to a method for the production thereof by reacting alkaline-earth metal compounds with titanium dioxide particles. The titanium dioxide particles have a BET-surface greater than 50 m2/g. The titanium dioxide particles can have a very low sulphate, chloride and carbon content. The reaction can take place at a temperature below 700&#xb0; C. The alkaline-earth titanate can have a BET-surface of 5-100 m2/g. Advantageously, it does not contain any hydroxyl groups in the crystal lattice. The alkaline-earth titanate can be used in the production of microelectronic components.

Fine-particled alkaline-earth titanates and method for the production thereof using titan oxide particles

The invention concerns a method for processing heavy metal-laden spent sulfuric acid. For this, iron-laden spent sulfuric acid or iron-laden sulfuric materials obtained therefrom are reacted with a material that contains iron chloride and optionally other metal chlorides, producing iron (II) sulfate. The spent sulfuric acid preferably derives from titanium dioxide production.

Method for processing iron-laden spent sulfuric acid

The invention relates to a method for directly cooling fine-particle, powdery solid substances by using a cooling medium provided in the form of low-boiling condensed gases or of cold gases obtained therefrom, whereupon bulk material packings are subsequently filled with these solid substances. The invention also relates to a device for directly cooling the fine-particle, powdery solid substances and to fine-particle, powdery solid substances, which are located inside bulk material packings and which, compared to air, have a lower oxygen content in the gas phase between the solid substance particles.

Method for directly cooling fine-particle solid substances

Process for the preparation of iron oxide pigments from the waste acid resulting from the preparation of titanium dioxide by the sulfate process, characterized in that in a first stage a partial neutralization of the sulfuric acid contained in the waste acid is performed with compounds from the group comprising metallic iron and/or iron compounds, the sulfuric acid is optionally further neutralized with a further alkaline compound, the precipitate containing Ti, Al, Cr and V compounds is separated from the resultant reaction product and an iron oxide yellow pigment or iron oxide black pigment is precipitated from the resultant iron sulfate-containing solution by addition of alkaline compounds as well as an oxidizing agent, each pigment being able to be baked to form an iron oxide red pigment.

Method for producing iron oxide pigments from waste acid resulting from TiO2 production

Process for the production of gypsum and also of an iron-oxide pigment from the waste acid that accumulates in the course of the production of titanium dioxide in accordance with the sulfate process, characterized in that in a first stage a partial neutralization of the waste acid is effected with a calcium compound subject to precipitation and optionally direct separation of gypsum, subsequently the remaining solution is neutralized further in a second stage subject to precipitation of a deposit containing Ti, Al, Cr, V and optionally Fe(III) and from the solution containing iron sulfate that is obtained after separation of the solids an iron-oxide pigment is produced in a third stage by addition of alkaline compounds and also of an oxidizing agent.

Method for reprocessing waste acid resulting from TiO2 production

Process for the production of gypsum and also of an iron-oxide pigment from the waste acid that accumulates in the course of the production of titanium dioxide in accordance with the sulfate process, characterized in that in a first stage a partial neutralization of the waste acid is effected with a calcium compound subject to precipitation and optionally direct separation of gypsum, subsequently the remaining solution is neutralized further in a second stage subject to precipitation of a deposit containing Ti, Al, Cr, V and optionally Fe(III) and from the solution containing iron sulfate that is obtained after separation of the solids an iron-oxide pigment is produced in a third stage by addition of alkaline compounds and also optionally addition of ammonia and also of an oxidizing agent, ammonia being liberated by addition of CaO and/or Ca(OH) from the solution containing (NH ) SO that is obtained after separation of the iron-oxide pigment.

Method for reprocessing waste acid to form gypsum and iron oxide

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Krefeld, Germany

Gerhard Auer