Patent · US Expired

Dust recirculation in the direct synthesis of chlorosilanes and methylchlorosilanes in a fluidized bed

US6465674B1 · kind B1 · utility

7Cited by

3References

7Claims

0Family size

Assignee

Wacker Chemie AG · DE

Inventors

Wilfried Kalchauer · Burghausen, DE
Herbert Straussberger · Mehring, DE
Willi Streckel · Schweich, DE
Jochen Gross · Erlangen, DE

Key dates

Filing date	Apr 10, 2002
Grant date	Oct 15, 2002
Priority date	—
Expiry date	Apr 10, 2022

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07F7/16
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A continuous process for the direct synthesis of silanes of the formula 1RaSiCl4−a  (1)involves reacting finely divided silicon metal with R—Cl in a fluidized bed, whereR is hydrogen, methyl or ethyl anda is 0, 1, 2, 3 or 4,where a product stream comprising gaseous silanes of the formula 1, further gaseous reaction products, unreacted RCl and silicon-containing dust is discharged from the fluidized bed, wherein at least part of the dust is introduced in the form of a suspension in a liquid selected from among liquid silanes of the formula 1, further liquid reaction products and mixtures thereof, into the fluidized bed.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.