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US 5,399,336 AGranted
Stannozeosilite/zirconozeosilite zeolites and catalytic hydroxylation of phenolics therewith
AssigneeRhone-Poulenc Chimie
InventorsJean-Louis Guth, Michel Costantini, Annie Lopez, Jean-Michel Popa
Life of this patent
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Abstract
Calcined silica/oxide zeolites, characteristically MFI stannozeosilites or zirconozeosilites, well adopted for catalyzing the H.sub.2 O.sub.2 hydroxylation of phenols or phenol ethers, have the formula (I): (Si.sub.96-x T'.sub.x)0.sub.192 (I) in which x is a number ranging from 0.1 to 5.0 and T' is tetravalent tin or tetravalent zirconium.
Claims45
A calcined silica/oxide zeolite of MFI type having the formula (I):
- (Si.sub.96-x T'.sub.x)O.sub.192 (I)
- in which x is a number ranging from 0.1 to 5.0 and T' is tetravalent tin or tetravalent zirconium.
A silica/oxide zeolite of MFI type precursor having the formula (IV):
- (Si.sub.96-x T'.sub.x)O.sub.192, 4.+-.1(S.sup.+ F.sup.-) (IV)
- in which x is a number ranging from 0.1 to 5.0, S.sup.+ is a structuring agent cation and T' is tetravalent tin or tetravalent zirconium.
Dependencies are inferred from the claim text.