Basf Aktiengesellschaft

Metallgesellschaft Aktiengesellschaft

Arend Werner

Hartmut Hibst

Helmut Barzynski

Gregor Ley

Josef Lamprecht

Erich Haedicke

Joachim Hack

Werner Grau

Klaus D Schomann

Guenter Heil

Hugo Grimm

Norbert Holl

Michael Tacke

Michael Hitzfeld

Heinz Neumann

Bruno Triebskorn

Egon Winkler

Juergen Petermann

Walter Beitelschmidt

Heinrich Mannsperger

Peter Ahrens

Johann Kronenbitter

To effect a quasi-isothermal catalytic reaction of SO.sub.2 to SO.sub.3, a plurality of consecutive rows of banks of cooling tubes, are provided in the bed of shaped catalyst bodies in a contact reactor in such a manner that the banks of succeeding rows are staggered from the banks of the preceding rows. The distance between the cooling tubes in the banks is so selected that a penetration of entire catalyst bodies into the banks will virtually be prevented. The banks are so designed that the pressure drop of the gas in the banks is approximately the same as the pressure drop in the layer of catalyst between the bank. The distance between the banks is larger than the width of the banks.

Contact reactor for a quasi-isothermal catalytic oxidation of SO.sub.2

Disk-shaped magnetic recording media essentially consisting of a flexible substrate, a thin ferromagnetic metal film applied to one or both sides and a protective or antifriction layer present on this metal film and essentially consisting of carbon, a process for the production of these recording media and information stores containing these recording media.

Disk-shaped magnetic recording media, their production and information

Magnetic recording media for perpendicular recording are produced by coating a non-magnetic substrate by a PVD method with a cobalt-containing, ferromagnetic metal layer which has magnetic anisotropy perpendicular to the plane of the layer, by a process in which the temperature of the substrate is increased by external heating during coating.

Production of magnetic recording media for perpendicular recording

A photosensitive recording material for recording information by means of a local change in the optical properties of a recording layer under the action of light having a high energy density, and a process for its preparation.

Recording material containing a layer of polymer particles and a

Photosensitive recording material

Magnetic recording media essentially consisting of a disk-shaped aluminum substrate, a nonmagnetic (Ni-P) lower film, a chromium-containing intermediate film and a ferromagnetic metal film are produced by a process in which the surface of the (Ni-P) lower film is cleaned by RF sputter etching and then oxidized.

Production of magnetic recording media

Irreversible optical recording media record information through local alteration of the optical properties of a recording layer on exposure to light.

Irreversible optical recording media and fabrication thereof

Optical recording media for recording and retrieval of information by means of high energy radiation, which media consist essentially of a polymeric base having uniaxial orientation and, applied on this, a metal film of high reflectivity having the orientation of the crystallites corresponding to the orientation of the base and retrieval of information are effected by means of high energy radiation.

Optical recording medium

An irreversible optical medium for storing information by local modification of the optical properties of a recording layer under the action of a light beam with an irradiance of from 0.05 to 10 nJ .mu.m.sup.2, essentially consisting of a substrate and, applied on this, a particulate recording layer from 0.01 to 10 .mu.m thick, wherein the recording layer consists of a three-dimensional arrangement of particles having a mean particle diameter of from 4 to 40 nm, and a process for its production.

Irreversible optical medium for information storage, and its production

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Bad Duerkheim, Germany

Arend Werner