	US 12,291,544 B2
	Process for preparing trimethylchlorosilane
Jan Tillmann, Munich (DE); and Richard Weidner, Burghausen (DE)
Assigned to Wacker Chemie AG, Munich (DE)
Appl. No. 17/780,559
Filed by Wacker Chemie AG, Munich (DE)
PCT Filed Dec. 4, 2019, PCT No. PCT/EP2019/083663 § 371(c)(1), (2) Date May 27, 2022, PCT Pub. No. WO2021/110256, PCT Pub. Date Jun. 10, 2021.
Prior Publication US 2022/0411444 A1, Dec. 29, 2022
Int. Cl. C07F 7/12 (2006.01)

CPC C07F 7/125 (2013.01)

8 Claims

1. Process for preparing trimethylchlorosilane (M3) and methyltrichlorosilane (M1) by disproportionation of dimethyldichlorosilane (M2) in the presence of an Al₂O₃catalyst, wherein the Al₂O₃catalyst utilized has a BET surface area within a range of 100-200 m²/g, the dimethyldichlorosilane being used is in the form of a silane mixture that comprises 80-100% by weight of dimethyldichlorosilane (M2), and wherein the difference in content from 100% by weight comprises M1 and M3.