Process for preparing alkenylhalosilanes and reactor suitable therefor

US9718844B2 · kind B2 · utility

Assignee

• EVONIK DEGUSSA GMBH · DE

Inventors

• Stefan Bade · Rheinfelden (Baden), DE
• Norbert Schladerbeck · Kelkheim, DE

Key dates

• Filing date: May 28, 2013
• Grant date: Aug 1, 2017
• Expiry date: May 28, 2033

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2219/24
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Described is a method for producing alkenyl halosilanes by reacting alkenyl halide selected from the group comprising vinyl halide, vinylidene halide, and allyl halide with halosilane selected from the group comprising monohalosilane, dihalosilane, and trihalosilane in the gas phase in a reactor comprising a reaction tube (1) that has an inlet (2) at one end and an outlet (3) at the other end, said reactor further comprising an annular-gap nozzle (4) that is mounted on the inlet (2), extends into the reaction tube (1), and has a central supply duct (5) for one reactant (7) and a supply duct (6), which surrounds the central supply duct (5), for the other reactant (8). In order to carry out said method, alkenyl halide is injected into the reaction tube (1) through the central supply duct (5), halosilane is injected thereinto through the surrounding supply duct (6), and both substances flow through the reaction tube (1) in the direction of the outlet (3). The described method allows alkenyl halosilanes to be produced at a high yield and with great selectivity. The amount of soot formed is significantly lower than in conventional reactors. The invention also relates to a reactor for ca…