Patent ID: 8692012

Claim:
A process for producing silanes of formula I R 1 —C(═O)—O—R 2 —SiR 3 3 (I) comprising reacting at least one salt of a carboxylic acid of formula II [R 1 —C(═O)—O] a [M a+ ] (II) with at least one silane of formula III X—R 2 —SiR 3 3 (III) to form a product mixture, and distilling the product mixture to provide a distillate containing at least one silane of formula I, wherein at least one high-boiling solvent HBS is present in the product mixture during at least a portion of said distilling, wherein the HBS has a higher boiling point than the silane of formula I when measured at the pressure at which distilling is carried out, wherein X is a leaving group which is carboxylate substitutable, R 1 is hydrogen or a monovalent C 1 -C 18 hydrocarbon radical which is unsubstituted or substituted with one or more groups Q, optionally interrupted by one or more heteroatoms, Q when attached to an sp 3 -hybridized carbon atom is a hydrocarbonoxy, acyloxy, hydrocarboncarbonyl, carbonyl, hydrocarbonoxoy-carbonyl, hydrocarbonsulfide, acylsulfide, cyano or nitro group, and when attached to an sp 2 - or to an sp-hybridized carbon atom, is a hydrocarbonoxy, acyloxy, hydrocarboncarbonyl, carbonyl, hydrocarbonoxycarbonyl, hydrocarbonsulfide, acylsulfide, cyano or nitro group or has the meaning of X, R 2 is a divalent C 1 -C 18 hydrocarbon group which is unsubstituted or substituted with one or more groups Q, and is optionally interrupted by one or more heteroatoms, R 3 is hydrogen, or an unsubstituted or Q-mono- or -polysubstituted monovalent C 1 -C 18 hydrocarbon group, C 1 -C 18 hydrocarbonoxy group, Si 1 -Si 4 silane group or an Si 1 -Si 4 siloxy group which is optionally interrupted by one or more heteroatoms, M a+ is an a-tuply positively charged cation, and a is an integer not less than 1.