Basf Aktiengesellschaft

Klaus Bittins

Peter Zehner

Bernd Bruchmann

Gerhard Nestler

Toni Dockner

Leopold Hupfer

Ludwig Schuster

Marc Heider

Irene Troetsch-Schaller

Dieter Voges

Martin Schmidt-Radde

Helmut Lermer

Wolfgang Heider

Stefan Wolff

Dietrich Wolff

Ulrich Eiden

Stefan Berg

Manfred Herr

Jochen Kellenbenz

Gundo Brauch

Rudolf R Schnur

Wilhelm Haarde

Kurt Josef Wagner

Laurance Thurman

Edmund Niedbalski

A process for breaking down aromatics in industrial wastewaters that contain small amounts of aromatics by reaction with an ozone-containing oxygen stream at a temperature of from 40 to 70&deg; C. and at a pH of from 4 to 7, involves treating industrial wastewaters that contain small amounts of aromatics in two stages with an oxygen stream that contains from 5 to 8% by volume of ozone with thorough mixing by causing the wastewater to flow upward through two reaction zones, the overflow of the wastewater at the top of the first reaction zone entering the second reaction zone at the base, the purified wastewater being obtained at the top of the second reaction zone, the ozone-containing oxygen stream first entering at the base of the second reaction zone, and the waste gas obtained at the top of the second reactor being introduced at the base of the first reaction zone, and, furthermore, a gas containing less than 0.2% by volume of ozone being obtained at the top of the first reaction zone.

Breaking down aromatic compounds in industrial wastewaters

Process and device for preparing (cyclo)aliphatic biuret

Process for carrying out gas/liquid reactions at from (-50.degree.) to 300.degree. C. and from 0.1 to 100 bar by carrying out the reaction in the absence of a continuous gas phase, and, as a special case, a process for the batchwise reaction of acetylene in the liquid phase at from 0.degree. to 300.degree. C. and from 2 to 30 bar, in which acetylene is introduced a) in the absence of a continuous gas phase and b) under isobaric conditions to a degree of saturation of from 5 to 100%.

Process for carrying out gas/liquid reactions under avoidance of a

1,4-butanediol mono(meth)acrylate is prepared by esterification of (meth)acrylic acid with 1,4-butanediol, by a process in which an aqueous solution of unconverted 1,4-butanediol is obtained, wherein the 1,4-butanediol present in the aqueous solution is converted into readily volatile tetrahydrofuran in the presence of a catalytic amount of a strong acid and the tetrahydrofuran is separated off from the aqueous solution.

Preparation of 1,4-butanediol mono(meth)acrylate by esterification of

Preparation of methyl formate by the reaction of carbon monoxide and methanol under conditions of elevated pressure and temperature in the presence of an alkali metal methylate, in which

Preparation of methyl formate

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Frankenthal, Germany

Klaus Bittins