Degussa Aktiengesellschaft

Evonik Degussa Gmbh

Basf Construction Polymers Gmbh

Jürgen Heidlas

Karsten Korth

Martin Ober

Kurt Stork

Rudolf Zobel

Johann Plank

Oliver Klockmann

Reimund Pieter

Gregor Keilhofer

Peter Lange

Kurt Eichenauer

Zhengfeng Zhang

Johann Wiesmüller

Johann Obersteiner

Johann Huber

The invention relates to a method for impregnating a support matrix with solid and/or liquid compounds using a compressed gas or a compressed mixture of gases at densities ranging from 0.15 to 1.3 kg/l and at least two unsymmetrical pressure changes (pulsations). The method is further characterized in that both a multitude of impregnating substances such as biologically active compounds, technical materials or metal-organic compounds, as well as support matrices of biological origin and organic or inorganic substances can be used that have large inner surfaces and/or inner surfaces that are difficult to access.

Method of impregnating a carrier a matrix with solid and/or liquid compounds using compressed gases, and materials thus impregnated

Subject matter of the present invention is a drilling fluid additive based on sulfonated asphalt, which comprises a water soluble and anionic polymer component in quantities of 0.1 to 20 wt. %, with respect to the total additive in addition to the asphalt component. With this additive the water solubility of sulfonated asphalt can be markedly increased. This additive, whose polymer component is thermally highly stable, is utilized primarily in water- and/or oil-based drilling fluids and in particular in the exploration of subterraneous petroleum and natural gas deposits. Typical polymer components to consider are representatives of polycondensation products, such as phenol resins, ketone resins and sulfonated naphthalene, acetone and amino plasticizer resins (for example urea and melamine resins).

Additive for drilling fluids

Process for the extraction of substances from at least one silane-modified oxidic or silicatic filler, wherein at least one gas compressed by means of pressure and/or temperature is employed as the extraction agent and the compressed gas is led in the radial direction through the filler in the pressure container and/or the substances extracted from the silane-modified filler are removed from the compressed gas with a suitable sorbent. A device for carrying out the process is furthermore described, wherein this comprises at least one pressure container having at least one internal container, sieve or insert for accommodation of the fillers which is permeable to gas and at least one gas feed and gas removal in the bulk bed of filler, and has a radially designed gas feed or gas removal from the bulk bed of filler.

Process and device for the extraction of substances from silane-modified fillers

Silane-modified oxidic or siliceous filler with a bead fraction below 75 &#x3bc;m of less than 15 wt. % and a median particle size distribution between of 150 to 500 &#x3bc;m, which is produced by the reaction of at least one microbeaded or microgranular, oxidic or siliceous filler in a compressed gas with at least one silane. The silane-modified oxidic or siliceous fillers are used in rubber compounds.

Silane-modified oxidic or siliceous filler, process for its production and its use

Growing community of inventors

Trostberg, Germany

Jürgen Heidlas