Patent ID: 7060651

Claim:
A silica-rich support comprising silicon oxide and non-silica-containing oxides, wherein the 29 Si MAS NMR spectrum the state of silicon in the support is characterized by the presence of lines with chemical shifts −100±3 ppm (line Q 3 ) and −110±3 ppm (line Q 4 ), with the ratio of the integral intensities of the lines Q 3 /Q 4 of from 0.7 to 1.2, in the infrared spectrum there is an absorption band of hydroxyl groups with the wave number 3620–3650 cm −1 and half-width 65–75 cm −1 , and the silica-rich support has a specific surface area as measured by the BET techniques from the thermal desorption of argon, S Ar =0.5–30 m 2 /g, and the surface, as measured by alkali titration techniques, S Na =10–250 m 2 /g, with the ratio S Na /S Ar =5–30.