Patent ID: 6911552

Claim:
A method for preparing alkyldichlorosilanes of Formula 3 by directly reacting metallic silicon with a mixture of alkyl chloride of Formula 1 and hydrogen chloride or alkyl chloride (Formula 2) which can generate hydrogen chloride at a reaction temperature in the presence of copper catalyst: Si ⁢ + RCl ( Formula ⁢ ⁢ 1 ) + R 1 ⁢ Cl ( Formula ⁢ ⁢ ⁢ 2 ) → RSiHCl 2 ( Formula ⁢ ⁢ ⁢ 3 ) + R 1 ⁢ SiCl 3 ( Formula ⁢ ⁢ 4 ) wherein, R is a linear, branched or cyclic C 3-10 alkyl group, R 1 is hydrogen or a primary secondary or tertiary C 4-6 alkyl group.