Sasol Germany Gmbh

Rwe-dea Aktiengesellschaft Fuer Mineraloel Und Chemie

Uwe Kaltwasser

Britta Jakobs-Sauter

Herbert Koch

Heinz Napierala

Meinolf Enneking

Klaus Kwetkat

Ulrike Jacobs

Ernst-J&uuml;rgen Lehmann

The present invention relates to highly concentrated, anhydrous amine salts of hydrocarbon polyalkoxy sulfates, wherein the salts are selected from the group of substituted amines, preferably alkanolamines. The products obtained are of low viscosity and pumpable at room temperature. Due to the absence of water, the salts are highly resistant to hydrolysis, even at high temperatures. The invention further relates to the use of the compositions according to the invention in an aqueous dilution for use in oil reservoirs with the aim of achieving enhanced oil production, or for the recovery of hydrocarbons from tar sands or other surfaces or materials provided with hydrocarbon.

Highly concentrated, water-free amine salts of hydrocarbon alkoxysulfates and use and method using aqueous dilutions of the same

The present invention is directed to highly-concentrated compositions of salts of alkyl polyalkoxy sulphates, whereby in total at least &#x2154; of all alkoxy unit of the alkyl polyalkoxy sulphates are propoxy units.

Highly-concentrated flowable salts of alkyl polyalkoxy sulphates

A process is disclosed for preparing di- or oligoamide alkoxylates. Diamides are prepared from carboxylic acids or carboxylic acid alkyl esters and di-, oligo-, or polyamines and are alkoxylated as a melt directly after their preparation, without any further intermediate preparation process.

Process for preparing mono-, Di- or oligoamide alkoxylates

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Marl, Germany

Uwe Kaltwasser