Silica-rich carrier, catalyzer for heterogeneous reactions...

Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Silicon containing or process of making

Reexamination Certificate

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C502S241000, C502S242000, C502S243000, C502S244000, C502S245000, C502S254000, C502S255000, C502S256000, C502S257000, C502S258000, C502S259000, C502S260000, C502S261000, C502S262000, C502S263000, C502S305000, C502S308000, C502S309000, C502S310000, C502S313000, C502S314000, C502S315000, C502S316000, C502S317000, C502S318000, C502S319000, C502S320000, C502S321000, C502S322000, C502S323000, C502S324000, C502S325000, C502S326000, C502S327000, C502S330000, C502S331000, C502S332000, C502S333000, C502S334000, C502S

Reexamination Certificate

active

07060651

ABSTRACT:
A silica-rich support and a catalyst containing the silica-rich support and a catalytic component. The support has a specific structure characterized by a set of claimed physicochemical properties: in the29Si MAS NMR spectrum the state of silicon is characterized by the presence of lines with chemical shifts −100±3 ppm (line Q3) and −110±3 ppm (line Q4), with the ratio of the integral intensities of the lines Q3/Q4of from 0.7 to 1.2 (FIG.1); in the IR spectrum there is an absorption band of hydroxyl groups with the wave number 3620–3650 cm−1and half-width 65–75 cm−1(FIG.2); the carrier has a specific surface area, as measured by the BET techniques from the thermal desorption of argon, SAR=0.5–30 m2/g and the surface, as measured by alkali titration techniques, SNa=10–250 m2/g, with SNa/SAr=5–30.

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