Basf Aktiengesellschaft

Basf Se Corporation

Basf Aktiengellschaft

Thomas Bogenstätter

Alfred Oftring

Ingo Klopp

Dirk Franke

Günter Scherr

Thomas Greindl

Matthias Rauls

Christian Ott

Knut Kessel

Michael Kluge

Jürgen Huff

Manfred Munzinger

Richard Van Gelder

Jasmina Kessel

Heribert Deck

Ortwin Gröhl

Thomas Weeser

Jan Ulrich

The invention relates to a reactor for carrying out an exothermic reaction in the gas phase, which comprises a vessel having an outer wall () composed of a metallic material, wherein an inner shell () is accommodated in the interior of the reactor () and the inner shell () has a spacing of at least 50 mm to the inside of the outer wall ().

Reactor for carrying out an exothermic reaction in the gas phase

A process for carrying out a liquid/solid reaction comprises The process has the advantage that the insoluble reaction product is obtained in a readily filterable form.

Process for liquid/solid reaction

A process is described for preparing ammonium salts of aromatic carboxylic acids by reacting an aromatic carboxylic acid with ammonia in an aprotic solvent, which comprises carrying out the reaction in a closed vessel by continuously introducing a solution of the aromatic carboxylic acid in the aprotic solvent and passing in gaseous ammonia so that an ammonia partial pressure in the range from 0.1 to 3 bar is maintained in the gas space of the vessel, and discharging a suspension of the ammonium salt in the aprotic solvent. The process allows the preparation of ammonium salts of defined crystal size having a narrow size distribution.

Production of ammonium salts of aromatic carboxylic acids

Ethers, esters or acid anhydrides are advantageously obtained when a cake of a first reactant selected from salts of organic or oxygen-containing inorganic acids or alkoxides disposed on a filter element is flowed through by a solution of a second reactant selected from inorganic or organic acid halides and alkyl halides, so that the insoluble halide salt formed remains on the filter element. The halide salt can thus be removed substantially quantitatively in a simple manner.

Method for producing ethers, esters or acid anhydrides

In a process for the continuous preparation of 2-bromo-2-nitro-1,3-propanediol, nitromethane is firstly reacted with formaldehyde and alkali metal hydroxide and the reaction mixture obtained in this way is subsequently reacted with bromine.

Method for the continuous production of 2-bromo-2-nitro-1,3-propanediol

A process for preparing guanidine derivatives, in particular creatine, is described and entails an O-alkylisourea salt and a primary or secondary amine being reacted in the presence of crystals of a guanidine derivative.

Process for preparing guanidine derivatives

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Bad Dürkheim, Germany

Thomas Bogenstätter