Dynamit Nobel Aktiengesellschaft

Huels Troisdorf Ag

Hans Leuck

Hans-Jorg Westermann

Gunter Bison

Gunther Meyer

Otto Ackermann

Klaus Thewalt

Gerhard Schmeling

Hans-Jorg Westerman

Disclosed is a method for the production of benzene carboxylic acids and benzene carboxylic acid esters or their mixtures, while p-toloylic acid is made from p-xylene and terephthalic acid monomethyl ester is simultaneously prepared from p-toluylic acid ester. The oxidation is performed by the addition of oxidator liquid and gases containing oxygen in single orifice mixing nozzles with the formation of a highly disperse reaction phase and the single orifice mixing nozzles open into the oxidator liquid.

Method for the production of benzene carboxylic acids and benzene

A safe production of sodium nitro-1,3-propanediol from a reaction solution of nitromethane and paraformaldehyde in methanol by addition of sodium methylate is achieved by evaporative cooling of the methanol; it being possible to maintain reaction temperatures of 35.degree. C. to 50.degree. C.

Process for producing the sodium salt of 2-nitro-1,3-propanediol

In this method of producing 1,2-dichloroethane from ethylene and chlorine gas in an approximately equimolar ratio at reaction pressures between 2 and 20 bar, at ethylene dichloride boiling temperatures between 105.degree. and 225.degree. C., in the presence of catalysts acting as Lewis acids, the catalyst-free ethylene dichloride vapors produced in the evaporative cooling are withdrawn and then condensed and cooled, and liquid catalyst-containing ethylene dichloride is also withdrawn separately. All of the gaseous chlorine input, having a purity of about 90 to 100% by volume, is introduced into a condensed and cooled circulating stream of ethylene dichloride. The ethylene dichloride stream containing chlorine is brought to the reaction pressure, and then catalyst-containing ethylene dichloride withdrawn from the reactor is admixed. The ethylene dichloride stream, containing chlorine and catalyst, is heated while the catalyst-free ethylene dichloride stream is cooled, and from the latter the end product ethylene dichloride is taken as a partial stream. An ethylene partial stream is fed into the downward stream of the reactor. The downward stream, upon contact with a main input of ethylene introduced at the bottom of the reactor at a mass rate between 30 and 200 kg/sec.multidot.m.sup.2 is reversed into an upward stream forming a highly disperse gas-liquid phase.

Method of preparing 1,2-dichloroethane from ethylene and chlorine gas

A process for the continuous production of an alkali metal alcoholate of a higher alcohol which comprises continuously introducing a higher alcohol into a reaction vessel, continuously introducing an alkali metal alcoholate of a lower alcohol into said reaction vessel and continuously and simultaneously distilling over and removing from said reaction vessel lower alcohol which forms.

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Troisdorf, Germany

Hans Leuck