US Patent Issued to Evonik Operations on Feb. 3 for "Process for the production of sulfur containing silanes by utilization of phase transfer catalysis" (German Inventors)

ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,540,146, issued on Feb. 3, was assigned to Evonik Operations GmbH (Essen, Germany).

"Process for the production of sulfur containing silanes by utilization of phase transfer catalysis" was invented by Helmut Droege (Bornheim, Germany), Julia Hermeke (Gerlingen, Germany) and Elisabeth Bauer (Kleines Wiesental, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "A process for producing sulfur containing silanes may include: (a) preparing an aqueous phase by mixing sodium hydrosulfide or Na2S, sulfur, Na2CO3 and/or NaOH and brine from recycling (f); (b) adding 20 to 100 wt. % of total phase transfer catalyst; (c) continuously or portion-wise adding halog...