Bayer Aktiengesellschaft

Jurgen Dobbers

Fritz Gestermann

Karl Reizlein

Hans Kyri

Kurt Bredtmann

Hans-Nicolaus Rindfleisch

Process for direct electrochemical gaseous phase phosgene synthesis

A self-levelling mortar mixture containing anhydrite, activator salts, plasticizers, surfactants and water is improved by providing the anhydrite in the form of both coarse-grained particles and finely ground particles.

Self-levelling mortar mixture

A precipitating agent for the dephosphatization of effluent comprising by weight about 5 to 75% of active iron (III) sulphate, about 25 to 95% of active iron (III) oxide and 0 to about 10% of anhydrous magnesium sulphate. Optionally, an alkaline constituent such as the oxide or hydroxide of calcium or magnesium may also be present and dephosphatization is effected at a pH of about 4.5 to about 8.5. Extremely low contents of residual phosphorous can be obtained in the filtrate, a precipitate containing iron and phosphorous settling out cleanly.

Precipitating agent for dephosphatizing effluent

Growing community of inventors

Leverkusen, Germany

Jurgen Dobbers