Wintershall Holding Gmbh

Tillmann Faust

Hartwig Voss

Rajan Hollmann

Julia Kristiane Schmidt

Stephan Freyer

Hartwig Voβ

Benjamin Wenzke

Jörg Therre

Tobias Käppler

Bernd Leonhardt

Sebastian Briechle

Foppe Visser

Joerg Therre

Tobias Kappler

A two-stage process for mineral oil production from mineral oil deposits with a deposit temperature of more than 70&#xb0; C. and a salinity of 20 000 ppm to 350 000 ppm, in which an aqueous formulation comprising at least one glucan with a &#x3b2;-1,3-glycosidically linked main chain, and side groups &#x3b2;-1,6-glycosidically bonded thereto and having a weight-average molecular weight Mof 1.5*10to 25*10g/mol, are injected into a mineral oil deposit through at least one injection borehole and crude oil is withdrawn from the deposit through at least one production borehole. The aqueous formulation is prepared in two stages, by first preparing an aqueous concentrate of the glucan, and diluting the concentrate on site with water to the use concentration.

Process for mineral oil production from mineral oil deposits with high deposit temperature

A process for the preparation of aqueous solutions of glucans having a &#x3b2;-1,3-glycosidically-linked main chain and side groups having a &#x3b2;-1,6-glycosidic bond by fermentation of fungal strains. The fungal strains secrete the glucans into the fermentation broth, in an aqueous culture medium, and the separation of the glucans from the fermentation broth is effected using asymmetrical filter membranes.

Process for the preparation of homopolysaccharides

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Weisenheim am Sand, Germany

Tillmann Faust