Production of (organo)halosilanes, used in pyrolysis to recover pure silicon and silicon tetrahalide, uses microwave energy in reacting silicon with e.g. halogen, organohalogen compound, hydrogen halide, halosilane or mixture

摘要

Production of (organo)halosilanes (I) with 1-4 fluorine, chlorine and/or bromine atoms comprises using microwave energy in reacting silicon (Si) with mixtures of elements or compounds selected from halogens, organohalogen compounds, hydrogen halides, fluorosilanes, chlorohydrosilanes or organohalosilanes and/or hydrocarbons. Production of (organo)halosilanes of formula (I): RaHbSiXc comprises using microwave energy in reacting silicon (Si) with mixtures of elements or compounds selected from: (1) halogens and optionally organohalogen compounds (II), hydrogen (H2) or hydrogen halides (HX); (2) (II) and optionally H2 or HX; (3) HX; (4) fluorosilanes, chlorohydrosilanes or organohalosilanes with H2 or HX; or (5) hydrocarbons and HX. R = (un)substituted 1-10 C alkyl or aryl, in which one or more C atoms may be replaced by -CO-, -CO2-, -O-, -S-, -SO-, -SO2-, -NH- or -NR'-; R' = (un)substituted 1-20 C alkyl; X = F, Cl or Br; a, b = 0, 1, 2 or 3; c = 1, 2, 3 or 4.