Bayer Aktiengesellschaft

Bayer Aktiengesselschaft

Lanxess Deutschland Gmbh

Redox Technologies Inc.

Matthias Stenger

Christine Maul

Michael Van Teeffelen

Alexander Klausener

Paul Wagner

Heinz Landscheidt

John Kollar

Holger Friedrich

Matthias Boll

Gotz-Gerald Borger

Rainer Ortmann

J&ouml;rg Tofahrn

Jorg Tofahrn

Naveen Kalideen

Daniel Van Rooyen

The present invention relates to a process for preparing chromium(III) oxide by reaction of alkali metal chromate with gaseous ammonia, subsequent hydrolysis, isolation of the hydrolysis product and calcination.

Process for preparing chromium(III) oxide

A method and a device for gentle continuous mixing of a droplet dispersion with a liquid are described, wherein the liquid is injected into the droplet dispersion in the form of a plurality of fine liquid jets, such that the kinetic energy of the liquid jets is dissipated at a short distance from the injection point and further mixing is effected by circulating flow generated in the vessel and exhibiting shear rates of less than 20/s.

Method and device for the continuous mixing of a droplet dispersion with a liquid

Method and device for the continuous mixing of a droplet dispersion with

It has been found that cyclopentene and hydrogen bromide can be continuously reacted in a simple manner to give cyclopentyl bromide in good yields and good selectivities if the reaction is carried out in the presence of a heterogeneous catalyst. The reaction can be carried out continuously and unreacted cyclopentene and possibly other constituents can be recirculated to the reaction.

Process for preparing cyclopentyl bromide

The present invention relates to a process for the treatment of waste gas discharged from a cyclohexane oxidation reactor used in the manufacture of adipic acid, said waste gas containing mainly nitrogen, oxygen, carbon monoxide, carbon dioxide, acetic acid, and up to 10% by weight cyclohexane, as well as other gases or vapors, by (a) scrubbing the waste gas from the cyclohexane oxidation reactor with acetic acid in a first absorption step to reduce the amount of cyclohexane to a residual content of less than about 1% by weight, (b) scrubbing the waste gas from the first absorption step with water in a second absorption step to reduce the amount of acetic acid to a residual content of less than about 1% by weight, and (c) subjecting the scrubbed waste gas from the second absorption step to an oxidation step to oxidize carbon monoxide and other oxidizable components of the waste gas to carbon dioxide and water.

Process for treatment of waste gas from a cyclohexane oxidation reactor

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Monheim, Germany

Matthias Stenger