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Neynaber Chemie Gmbh

Gerhard Stoll

Peter Daute

Rainer Hoefer

Roland Gruetzmacher

Heinz Mueller

Claus-Peter Herold

Stephan Von Tapavicza

Uwe Ploog

Guenter Uphues

Horst Rutzen

Rita Koester

Peter Wedl

Hermann Kluth

Ingo Wegener

Kurt Worschech

Johann F Fues

Klaus Hornfeck

Berthold Schreck

Rainer Jeschke

Werner Schneider

Marianne Waldmann-Laue

Ernst-Udo Brand

Faize Berger

Elke Grundt

Bernhard Meyer

Irina Slominski

The use is disclosed of at least substantially water-insoluble ethers which are fluid and/or at least plastically deformable at working temperature and have flash points of at least 80&deg; C., of mono- and/or polyfunctional alcohols of natural and/or synthetic origin or corresponding solutions of such ethers in ecologically acceptable water-insoluble oils as the dispersed oil phase of water-based O/W-emulsion drilling fluids which are suitable for the environmentally acceptable development of geological formations and which contain, if desired, insoluble, finely particulate weighting agents for the formation of water-based O/W-emulsion drilling muds and/or further additives, such as emulsifiers, fluid-loss additives, wetting agents, alkali reserves and/or auxiliary substances for the inhibition of drilled rock of high water-sensitivity.

Use of selected oleophilic ethers in water-based drilling fluids of the O/W emulsion type and corresponding drilling fluids with improved ecological acceptability

Process for dewatering fine-particle solids suspensions

Antimicrobial mixtures

The invention relates to alkoxylated compounds prepared by reaction of epoxidized C.sub.10-22 carboxylic acid derivatives with C.sub.2-4 alkylene oxides in the presence of alkoxylation catalysts and mono- and/or polyhydric alcohols.

Alkoxylated compounds produced from epoxidized carboxylic acid

Polyurethane-based friable sealing compound

The invention describes the use of water-insoluble esters with flash points above 80.degree. C., from monohydric alcohols of natural and/or synthetic origin with at least 4 carbon atoms, preferably at least 6 carbon atoms in the alcohol radicals, as the oil phase, or a constituent of the oil phase of invert drilling fluids which exist as W/O-emulsions, have a dispersed aqueous phase and ideally also have further usual additives in the continuous oil phase, which is fluid and pumpable in the temperature range of 0.degree. to 5.degree. C., and which are suitable for the environment-friendly development of, e.g., petroleum and natural gas deposits. Drilling fluids of the above type are also described which are characterized in that they contain as the continuous oil phase, or dissolved in ecologically-acceptable water-insoluble oils, an additive of at least largely water-insoluble ethers from monohydric alcohols, the oil phase in each case being fluid and pumpable in the temperature range of 0.degree. to 5.degree. C. and having flash points above 80.degree. C.

Use of selected ethers of monofunctional alcohols in drilling fluids

Thiodiglycol alkoxylate derivatives, a process for their production and

Stabilizers containing ketofatty acid glycerides for Ca/Zn-stabilized

Use of reaction mixtures containing polyester polyols in the production

Friable sealing compound for sealing joint boxes

Process for the production of reaction mixtures containing ester polyols

Process for the production of ketone compounds

Alkoxylation products of OH-functional carboxylic acid derivatives

Deinking wastepaper using alkoxylation product of carboxylic acid

Vicinally diacyloxy-substituted compounds of the formulae Ia, Ib, Ic and Id

Process for the production of vicinally diacyloxy-substituted

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Korschenbroich, Germany

Gerhard Stoll