Clariant Produkte (deutschland) Gmbh

Clariant Finance (bvi) Limited

Clariant Corporation

Clarient Finance (bvi) Limited

Clariant Produkte Gmbh

Tobias Rau

Heinrich Hesse

Jaime Gomez

Miguel Angel Arends

Norbert Ernstorfer

Wolfgang Buch

Klaus-Ulrich Pedain

Dirk Leinweber

Michael Patzke

The invention relates to a method for producing alkenyl succinic anhydrides of formula (1), in which R represents a C4 to C250 alkylene radical that can be linear or branched. The method involves the reaction of maleic acid, maleic anhydride, fumaric acid or esters thereof and an alkene which contains 4-250 carbon atoms at from 150 to 250&#xb0; C. in the presence of a synergistic mixture of a primary antioxidant, a secondary antioxidant, and a metal deactivator.

Method for producing alkenyl succinic anhydrides

This invention relates to the use of a compound of the formula (I) where Ris a hydrocarbon group having 1-40 carbon atoms, Ris an aliphatic hydrocarbon group having 2-4 carbon atoms, and also Ris an alkoxy group, n is in the range from 1 to 50, and m is 1 or 2, as flotation reagent in silicate flotationR&#x2014;O&#x2014;R&#x2014;NH&#x2014;[(R)&#x2014;H]&#x2003;&#x2003;(I).

Flotation reagent for silicates

The invention relates to the use of a compound of formulaR&#x2014;N-[A-NH]&#x2003;&#x2003;(1)wherein R represents a linear or branched alkyl group or alkenyl group having 6 to 20 carbon atoms while A represents a Cto Calkylene group, as collector in silicate flotation.

Flotation reagent for minerals containing silicate

The present invention relates a flotation reagent for sulfidic ores, containing at least one compound of formula (1), wherein R, R, R, R, Rand R, independent of one another, represent hydrogen or groups containing 1 to 15 carbon atoms or groups containing oxygen or nitrogen, and at least another compound serving as collector and containing at least one sulfur atom that is directly bound to a carbon or phosphorus atom, wherein the carbon or phosphorus atom is directly bound to at least another sulfur atom or an oxygen atom. 

Collector for sulfidic ores

A method for the flotation of sulfide ores is disclosed. The method comprises contacting the sulfide ores with a composition comprising at least one compound of the formula where

Collector for sulfide ores

Collecting agent for sulphidic ores, the production and use thereof

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Mainz, Germany

Tobias Rau