Abstract: A method is useful for maintaining a uniformly fluidized bed in a fluidized bed apparatus. The method includes the steps of charging a mixture of particles including copper silicide particles and fluidization additive particles into the fluidized bed apparatus, and uniformly fluidizing the particles at a temperature of at least 400° C. in the fluidized bed apparatus.

Abstract: A method for preparing a reaction product includes: steps (1) and (2). Step (1) is contacting, at a temperature from 200° C. to 1400° C., a first ingredient including a silane of formula HaRbSiX(4-a-b), where subscript a is an integer from 0 to 4, subscript b is 0 or 1, a quantity (a+b)<4, each R is independently a monovalent organic group, and each X is independently a halogen atom, with the proviso that when the quantity (a+b)<4, then the ingredient further includes H2; with a spinel catalyst including copper; thereby forming a reactant. Step (2) is contacting the reactant with a second ingredient including an organohalide at a temperature from 100° C. to 600° C.; thereby forming the reaction product and a spent reactant. The reaction product is distinct from the silane used in step (1). The method may be used to prepare diorganodihalosilanes from silicon tetrahalides.

Abstract: A method for preparing a reaction product includes: steps (1) and (2). Step (1) is contacting, at a temperature from 200° C. to 1400° C., a first ingredient including a silane of formula HaRbSiX(4-a-b), where subscript a is an integer from 0 to 4, subscript b is 0 or 1, a quantity (a+b)<4, each R is independently a monovalent organic group, and each X is independently a halogen atom, with the proviso that when the quantity (a+b)<4, then the ingredient further includes H2; with a spinel catalyst including copper; thereby forming a reactant. Step (2) is contacting the reactant with a second ingredient including an organohalide at a temperature from 100° C. to 600° C.; thereby forming the reaction product and a spent reactant. The reaction product is distinct from the silane used in step (1). The method may be used to prepare diorganodihalosilanes from silicon tetrahalides.

Abstract: The application relates to a method for preparing organohalosilanes in a two-step process: Steps (i) contacting a copper catalyst with hydrogen gas and halogenated silanes forming a silicon-containing copper catalyst; and Step (ii) contacting said silicon-containing copper catalyst with an organohalide to form the organohalosilane.

Abstract: The application relates to a method for preparing organohalosilanes in a two-step process: Steps (i) contacting a copper catalyst with hydrogen gas and halogenated silanes forming a silicon-containing copper catalyst; and Step (ii) contacting said silicon-containing copper catalyst with an organohalide to form the organohalosilane.