Hoechst Aktiengesellschaft

Hermann Vierling

Alexander Ohorodnik

Klaus Gehrmann

Gunter Legutke

Horst Semmler

Robert Willms

Joachim Hardel

Hans W Keuper

The disclosure relates to a process for making fine particulate, non-agglomerating chloropolyethylene by subjecting pulverulent polyethylene to a chlorination reaction in aqueous or aqueous/hydrochloric acid-suspension with chlorine gas at a temperature of about 20.degree. to 140.degree. C. in the presence of silicic acid and silicon oil, separating, washing and drying the chloropolyethylene. More particularly, the disclosure provides for the chlorination to be terminated and for the aqueous hydrochloric acid-suspension of chloropolyethylene to be then intensively mixed with an aqueous or aqueous/hydrochloric acid-dispersion having talc as well as an orthophosphoric acid mono- and/or diester or a polysiloxane by means of an emulsifier dispersed in it, and for the chloropolyethylene to be separated from the mixture, to be washed and dried.

Process for making fine particulate non-agglomerating chloropolyethylene

Abrasion-resistant active carbon carriers or catalysts are made. To this end, an abrasion-resistant carrier is impregnated with an aqueous solution of a saccharide, the impregnated carrier is dried and the saccharide is thermally decomposed in the absence of air to active carbon which tenaciously adheres to the carrier.

Production of space abrasion-resistant active carbon carriers or

Monovinylacetylene is produced by an improved process, wherein acetylene is introduced at temperatures within the range 40.degree. and 100.degree. C and under acetylene gas pressures within the range 0.01 and 10 atmospheres (gauge) into a Nieuwland catalyst type solution being an aqueous copper(I) chloride solution in hydrochloric acid, which is used in admixture with between 0.1 and 10 weight% of an alkali metal salt of an aminocarboxylic acid or of an aminosulfonic acid, and wherein acetylene is introduced into the catalyst solution jointly and simultaneously with an inert organic solvent extractant and stripping agent for the resulting monovinylacetylene, the solvent being in vapor form and being continuously passed through the catalyst solution so as to continually strip off monovinylacetylene originating from dimerized acetylene.

Production of monovinylacetylene

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Hurth, Germany

Hermann Vierling