Activated silica enriched mazzite, production method and application thereof
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United States of America Patent
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Oct 19, 1999
Grant Date -
N/A
app pub date -
Jun 8, 1998
filing date -
Jun 6, 1996
priority date (Note) -
Expired
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Abstract
The invention provides an activated silica enriched mazzite having a chemical formula in the anhydrous state, expressed in molar ratios of: a M.sub.2/n O; Al.sub.2 O.sub.3 ; b SiO.sub.2 ; with a variation from 0 to 0.5, M being an alkaline cation of valency n and b being greater than 7, and which has an acid strength corresponding to an amount of heat measured by ammonia absorption microcalorimetry, greater than 190 KJ/mol, and a pore volume, measured by cyclohexane adsorption, greater than 0.09 ml/g. The activated mazzites are useful in the conversion of hydrocarbons, in particular, the isomerization of C.sub.4 to C.sub.8 paraffin, and as molecular sieves in processes for the separation of hydrocarbons.
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