Bayer Aktiengesellschaft

Dieter W Bruck

Werner Jeblick

Heinrich Konigshofen

Lothar Ruetz

Helmut Fiege

Karlfried Wedemeyer

Ernst Roos

Helmut Waniczek

Marko Zlokarnik

Wolfgang Arlt

Josef Haydn

Alfred Nierth

Johann Renner

Feliks Bitners

Hans-Jorg Uhlmann

Richard Viard

Lother Ruetz

A process for the production of monomeric .alpha.-cyanoacrylates by pryrolysis of poly-.alpha.-cyanoacrylates and subsequent distillation of the resulting monomeric .alpha.-cyanoacrylates.

Process for the production of monomeric .alpha.-cyanoacrylates

Enol ethers corresponding to the following general formula ##STR1## are suitable as non-discoloring ozone protective agents for rubber.

Process for increasing the ozone-resistance of a rubber with enol ethers

The ozone-resistance of natural and synthetic rubber is increased when an enol ether of the formula ##STR1## is incorporated.

Process for increasing the ozone-resistance of a rubber

An improved process for the production of cyanogen chloride is disclosed according to which liquid hydrocyanic acid and gaseous chlorine are reacted in an aqueous medium. The liquid hydrocyanic acid and chlorine are introduced into a column-shaped reactor via at least one two-component nozzle. The reaction mixture is removed at the head of the column-shaped reactor. Preferably, the hydrocyanic acid is in liquid form and the chlorine is in gaseous form. By the process disclosed, quantitative yields of cyanogen chloride are obtained separately from aqueous solutions of hydrochloric acid of a strength suitable for commercial use.

Process for the production of cyanogen chloride from hydrocyanic acid

The use of open-chain acetals or ketals corresponding to the following general formula ##STR1## as non-discoloring anti-ozonants for natural and/or synthetic rubber.

Open-chain acetals or ketals as non-discoloring antiozonants for rubber

A process for the tertiary dealkylation of a tertiary alkyl containing m- and/or p-cresol wherein a tertiary alkyl containing m- and/or p-cresol is continously introduced into a reaction vessel with a small amount of sulfuric acid or an quivalent amount of a sulfonic acid and the reaction vessel contains a high concentration of m- and/or p-cresol or a high boiling phenol which under the prevailing reaction conditions is not substantially vaporized from the reaction mixture. The reaction mixture is maintained at a temperature of no greater than 230.degree. C. The reaction products are withdrawn continuously from the reactor (and separated into its components) and at the same time a small amount of the reaction mixture being withdrawn intermittently or continously from the reactor.

Process for the dealkylation of tert.-alkyl substituted phenols

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Cologne, Germany

Dieter W Bruck