Patent ID: 7659418

Claim:
A continuous process for preparing an organodialkylalkoxysilane of formula (IX): R 1 O—(R 2 R 3 )Si—(CH 2 ) 3 —A Comprising the steps of: a) continuously contacting an alcohol of formula (VIII): R 1 —OH in countercurrent with a silane of formula (VII): Hal-(R 2 R 3 )Si—(CH 2 ) 3 —A, in order to carry out the alcoholysis reaction of said silane in order to obtain the silane of formula (IX) and a product of formula H-Hal, the operation being carried out with stripping of the product of formula H-Hal formed, and b) recovering the organodialkylalkoxysilane formed in the reactor, in which formulae the symbol Hal represents a halogen atom selected from chlorine, bromine and iodine atoms, the chlorine atom being preferred; the symbols R 1 , which are identical or different, each represent a monovalent hydrocarbon group selected from a linear or branched alkyl radical having 1 to 15 carbon atoms and a linear or branched alkoxyalkyl radical having 2 to 8 carbon atoms; the symbols R 2 and R 3 , which are identical or different, each represent a monovalent hydrocarbon group selected from a linear or branched alkyl radical having 1 to 6 carbon atoms and a phenyl radical; and A represents a removable group selected alternatively from: a halogen atom Hal belonging to chlorine, bromine and iodine atoms, or a radical para-R 0 —C 6 R 4 —SO 2 —O— wherein R 0 is a linear or branched C1-C4 alkyl radical, or a radical R 0 —SO 2 —O— wherein R 0 is as defined above, or a radical R 0 —CO—O— wherein R 0 is as defined above.