Basf Aktiengesellschaft

Friedrich Hovemann

Knut Oppenlaender

Klaus Bronstert

Karl Stork

Erich Schwartz

Bruno Sander

Petr Simak

Volker Ladenberger

Kurt Scherling

Paul Boerzel

Pumpable free-flowing aqueous coal dispersions containing a special non-ionic dispersant which is a polyalkylene oxide bisphenol A derivative, and the use of the said dispersant in coal/water dispersions.

Aqueous coal dispersions

Aqueous, pumpable, free-flowing coal dispersions which may contain methanol and contain a special, oxyethylated, straight-chain, saturated fatty alcohol mixture as a nonionic dispersant, and the use of this dispersant in coal/water dispersions.

A process for dewatering petroleum-containing sludges by a two-stage method using finely divided additives and organic flocculants, wherein

Dewatering of petroleum-containing sludges with recovery of the oil

Isobutene polymers having a mean degree of polymerization P of from 10 to 100 and a proportion E of double bonds, capable of reaction with maleic anhydride, of from 60 to 90%, where E=100% corresponds to the calculated theoretical value for the case where each molecule of the isobutene polymer contains such a reactive double bond.

Polyisobutenes

Mineral lubricating oil compositions which contain a predominant proportion of a mineral lubricating oil together with a pour point depressant based on alkyl acrylate or alkyl methacrylate polymers and a viscosity index (VI) improver comprising a special selectively hydrogenated copolymer of styrene and a conjugated diene. The VI improver employed is a selectively hydrogenated, random butadiene-styrene copolymer containing from 35 to 45% by weight of styrene and possessing a particular structure and distribution of the monomers. The compositions exhibit high stability to shear and may therefore in particular be used for lubricating I.C. engines or gearboxes.

Growing community of inventors

Hockenheim, Germany

Friedrich Hovemann