CM-PATRA / record

Method for producing tetrahalosilanes

Publication

CN-104169217-A on Google Patents

Filed / published / granted

2012-10-26 / 2014-11-26 / n/a

Offices

CN, DE, JP, US, WO, KR, EP, IN (includes the Indian office)

Applicants

Spawnt Private S R L (LU, foreign-industry); Spawnt Private Sarl (, foreign-industry); Auner Norbert (DE, individual)

Minerals

Silicon

Stages

Compounds and materials

Waste stream

None named in the English text

CPC

C01B33/10705, C01B33/10747, C01F7/60

Abstract (first 170 chars)

A method produces tetrahalosilanes (SiX4) (X=halogen, more particularly Cl, F) from processed rock masses including high-viscosity hydrocarbons and SiO2 and/or silicates, or from the residue masses obtained in the course of such processing. In a first scheme, the masses may be heated in a stream of hydrogen halide, and the (SiX4) which forms in the course of this heating is captured or distilled off. In a second schem, the masses may be admixed with hydrofluoric acid (HF) and/or alkali metal fluoride or alkaline earth metal fluoride and with sulfuric acid, and the (SiX4) which forms in the cou