Basf Aktiengesellschaft

Otto Kratzer

Gerd Kaibel

Kaspar Bott

Herwig Hoffmann

Rudolf Irnich

Karl-Heinz Ross

Franz-Josef Mueller

Wolfgang Steiner

Walter Scheidmeir

Bernhard Ulrich

Gerhard Hefele

In a process for preparing phthalic anhydride by catalytic gas-phase oxidation of o-xylene or naphthalene or o-xylene/naphthalene mixtures with a gas comprising molecular oxygen over a coated catalyst comprising an inert, nonporous support material on which a catalytically active composition comprising titanium dioxide and vanadium pentoxide is applied in layer form, a catalyst whose catalytically active composition comprises from 3 to 6% by weight of vanadium pentoxide, calculated as V O , from 0.3 to 0.5% by weight of a cesium compound, calculated as Cs, and the remainder to 100% by weight of titanium dioxide in the anatase modification is used in the presence or absence of a coated catalyst, differing therefrom, for the catalytic gas-phase oxidation of o-xylene or naphthalene or o-xylene/naphthalene mixtures and, in the presence of such a second catalyst, the latter is used in a combined bed with the catalyst of the above composition in the reactor.

Method for producing acid phthalic anhydride and an appropriate shell catalyst containing titanium-vanadium-cesium

A process for the preparation of methyl formate by reacting methanol and carbon monoxide in the presence of an alkali metal alcoholate or alkaline earth metal alcoholate at from 30.degree. to 150.degree. C. and from 50 to 300 bar, wherein a nonionic complexing agent is used to bind the alkali metal cations or alkaline earth metal cations.

Preparation of methyl formate

Formamide is prepared continuously from methyl formate and ammonia, pure methanol being recovered, by a process wherein

Continuous preparation of furmamide

A process for the production of anhydrous or substantially anhydrous formic acid by hydrolysis of methyl formate which is carried out in a column having an upper fractionating section, a middle hydrolysis section and a lower extraction section and in which

Production of anhydrous or substantially anhydrous formic acid

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Bobenheim-Roxheim, Germany

Otto Kratzer