Basf Se Corporation

Basf Corporation

Wintershall Holding Gmbh

Walter Bertkau

Christian Schade

Helmut B Witteler

Thomas Heidenfelder

Gunnar Schornick

Joseph P Borst

Stefan Frenzel

Achim Fessenbecker

Alexander Göthlich

Frank Klippel

Jens Haas

Norbert Steidl

Walter Braumandl

Guido Vandermeulen

Thomas Schneider

Dietrich Fehringer

Bernd Laubusch

Mirjam Herrlich-Loos

Uwe Ossmer

Jessica Neumann

Frank Richter

Yu Mei

Shawn Rimassa

Bernd Strubel

Robert Orth

Helmut Löw

Stephan Hatscher

In a method of producing leather comprising a plurality of steps, methanesulfonic acid is used in at least one step.

Production of leather

Method of increasing the permeability in subterranean formations comprising rock that is soluble by acid, in particular carbonatic formations, using a formulation comprising at least an acid and a retarding surfactant which is an amphoteric surfactant. Preferably, the acid comprises methanesulfonic acid.

Process for acidizing using retarded acid formulations

Alkanesulfonic acid microcapsules and the use thereof as an additive for acidizing applications in carbonatic rock formations, especially for increasing the permeability of underground carbonatic mineral oil- and/or natural gas-bearing and/or hydrothermal rock formations and for dissolving carbonatic and/or carbonate-containing impurities in the production of mineral oil and/or natural gas or geothermal power generation are described. Additionally described is an acidic formulation comprising the inventive microcapsules and the use thereof for the aforementioned purpose, and a corresponding process.

Alkanesulfonic acid microcapsules and use thereof in deep wells

Process for passivating metallic surfaces, and a preparation suitable for implementing the process, comprising at least water, an acid, and a copolymer of functionalized (meth)acrylic esters, monomers containing phosphoric and/or phosphonic acid groups, monomers having COOH groups, and, if appropriate, further monomers. Copolymer which comprises said monomers.

Method of passivating metallic surfaces by means of copolymers having phosphoric acid and/or phosphonic acid groups

A continuous method for surface treatment of metal strips applies a finish coat having a thickness of not more than 3 &#x3bc;m, the apparatus employed for application being equipped with at least one IR sensor which faces a coated side of the strip, operates in reflection geometry, and serves to measure the coat thickness of the finish coat, with the strip running.

Continuous method for treating the surface of metal strips

Process for coating metallic surfaces with a copolymer of olefins and/or dienes, acidic monomers and, optionally, further monomers, the metal surfaces being contaminated with oil and/or grease, and the contamination not being removed prior to coating. Metallic surface obtainable by means of the process.

Method for coating metals

Process for the passivation of metallic surfaces, in particular of strip metals, by treatment of the surface with an acidic, aqueous preparation which comprises at least one water-soluble acid group-containing polymer and at least one wax.

Method for the passivation of metal surfaces with compositions comprising polymers with acid groups and waxes

Process for the passivation of metallic surfaces by treatment of the surface with an acidic, aqueous preparation which comprises at least one water-soluble acid group-containing polymer and Zn, Ca, Mg or Al ions, said process being in particular a continuous process for the passivation of strip metals.

Method for the passivation of metal surfaces with polymers containing acid groups

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Ludwigshafen, Germany

Walter Bertkau