Basf Aktiengesellschaft

Dieter Wolf

Gerd Kaibel

Peter Zehner

Kaspar Bott

Hans Diem

Erwin Thomas

Theodor Weber

Guenther Matthias

Guenther Rapp

Hartmut Schoenmakers

Ulrich Block

Otto Grabowsky

Rudolf Schmidt

Eberhard Bender

Kuerten, Heribert

Anhydrous or substantially anhydrous formic acid is obtained by hydrolysis of methyl formate, in a process wherein

Production of anhydrous or substantially anhydrous formic acid

Manufacture of formaldehyde by oxidative dehydrogenation of methanol in the presence of a silver catalyst using methanol obtained from a condensate derived from the evaporation of aqueous reaction mixtures in the synthesis of urea resins and then treated with caustic soda solution under specific conditions of temperature, pressure, residence time and initial formaldehyde concentration. The formaldehyde obtained is a disinfectant, tanning agent, reducing agent and starting material for the manufacture of synthetic resins, adhesives and plastics.

Manufacture of formaldehyde

Hydroxylammonium salts are manufactured by a process comprising the catalytic reduction of nitric oxide with hydrogen in a dilute aqueous solution of a mineral acid in the presence of a suspended platinum catalyst at an elevated temperature, wherein the reaction mixture is recycled and the gas mixture, containing nitric oxide and hydrogen, present in the gas space above the reaction zone, is introduced, by means of one or more downwardly directed jets of liquid, consisting of the recycled reaction mixture and issuing from a nozzle orifice, into one or more circulation zones which are present in the reaction zone, are open at both sides, extend in the direction of the entering jet of liquid and are completely covered by the reaction mixture, the reaction mixture leaving the bottom of the circulation zone and containing unconverted gases is deflected, passed upwards in the annular zone externally surrounding the circulation zone, and at the same time reaction mixture of low gas content is recycled from a separation zone located under the reaction zone.

Manufacture of hydroxylammonium salts

Dioxane is produced by reaction of ethylene glycol or a polyethylene glycol using an acid catalyst. The reaction product containing dioxane, water and byproducts is subjected to extractive distillation with a high-boiling agent which is miscible with water.

Recovery of anhydrous dioxane extractively distilled with diols or

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Gruenstadt, Germany

Dieter Wolf