Process for preparing methylchlorosilanes with structure-optimised silicon particles

US12065457B2 · kind B2 · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Karl-Heinz Rimböck · Heldenstein, DE
• Michael Muller · Munich, DE
• Natalia Sofina · Burghausen, DE

Key dates

• Filing date: Jun 14, 2019
• Grant date: Aug 20, 2024
• Expiry date: Dec 14, 2039

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J23/72
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for producing methylchlorosilanes of general formula 1, (CH3)nHmSiCl4-n-m, in which n represents values from 1 to 3 and m represents values of 0 or 1 in a fluidized bed reactor is provided. A chloromethane-containing reaction gas is reacted with a particulate contact mass containing silicon in the presence of copper catalyst. An operating granulation contains at least 1% by mass of silicon-containing particles S described by a structural parameter S. S has a value of at least 0 and is calculated according to equation (1), wherein φS is symmetry-weighted sphericity factor, ρSD is poured density [g/cm3], and ρF is average particle solids density [g/cm3].