Basf Aktiengesellschaft

Basf Magnetics Gmbh

Basf Se Corporation

Emtec Magnetics Gmbh

Harald Jachow

Andreas Tenten

Signe Unverricht

Heiko Arnold

Ekkehard Schwab

Otto Machhammer

Manfred Ohlinger

Helmut Jakusch

Ronald J Veitch

Susanne Haupt

Rudi Lehnert

August Lehner

Werner Lenz

Horst Westenfelder

Albert Kohl

Norbert Schneider

Helmut Auweter

Andreas Woelfert

Claudius Kormann

Peter Heilmann

Michael Bobrich

Andreas Wölfert

Karin Sperling

Norbert Mueller

Wilma M Dausch

Volker Koch

Guenter Renz

Reinhard Koerner

Erich Hoffmann

Reinhard K Orner

Günter Renz

Bernd H Oppner

Werner H&uuml;bner

Frank Grzonkowski

Heinz Driess

A process for compressing a hydrogen-sulfide-comprising gas stream, which comprises

Method for compressing gases containing hydrogen sulfide

In a process for heterogeneously catalyzed gas-phase oxidation, a reaction gas starting mixture comprising propane, molecular oxygen and, if desired, inert gas is passed at from 300 to 500&deg; C. over a fixed-bed catalyst.

Method of heterogeneous catalyzed vapor-phase oxidation of propane to acrolein and/or acrylic acid

In a process for the preparation of acrolein and/or acrylic acid from propane, the propane is subjected, in a first reaction stage, to a partial oxydehydrogenation with molecular oxygen under homogeneous and/or heterogeneous catalysis to give propene and the product gas mixture formed in the first reaction stage is then used for the preparation of acrolein and/or acrylic acid by gas-phase catalytic propene oxidation.

Method for producing acrolein and/or acrylic acid from propane

In a process for the preparation of acrolein and/or acrylic acid from propane, the propane is subjected, in a first reaction stage, to an oxydehydrogenation with molecular oxygen under homogeneous and/or heterogeneous catalysis to give propene and the product gas mixture formed in the first reaction stage is then used for the preparation of acrolein and/or acrylic acid by gas-phase catalytic propene oxidation.

Described are tape-type magnetic recording media (I) including a non-magnetic substrate (III), at least one film applied to the substrate and, in at least one of these films, an inorganic acicular pigment (II) suitable for use as a supporting pigment, the ratio of the mean length to the mean diameter of the pigment (II) being at least 3 and the mean modulus of elasticity of the films being not less than 15 GPa in the longitudinal direction of the tape-type recording medium (I).

Magnetic recording media

Hydrolytic preparation of titanium dioxide pigments

A finely divided acicular CrO.sub.2 modified with iron, tellurium and/or antimony and having a high coercive force possesses improved heat stability of the residual induction and a relatively narrow distribution of the particle size and of the coercive force. This CrO.sub.2 pigment is obtained by a method in which the iron compound used for the modification is iron oxalate, which is employed in an amount of 1-10% by weight, based on the theoretical CrO.sub.2 yield.

Finely divided acicular magnetic modified chromium dioxide

A magnetic recording medium comprising a nonmagnetic substrate and at least one magnetic layer applied thereon and containing an acicular chromium dioxide uniformly distributed in a polymeric binder and additives and having a coercive force of at least 60 kA/m, a mean particle length of the chromium dioxide of less than 300 nm, whose factor HD according to the formula ##EQU1## where KT is the coercive force of the magnetic layer in [kA/m], measured in an external field of 380 kA/m, L is the mean particle length and .DELTA.L is the range of the particle size distribution, determined from the numerical distribution of the particle length, both measured in [nm], is greater than 1.85, and a process for the preparation of this chromium dioxide.

Process for preparing modified chromium dioxide

Growing community of inventors

Bensheim, Germany

Harald Jachow