Catalytic dewaxing of oils containing ammonia over highly silice

Mineral oils: processes and products – Chemical conversion of hydrocarbons – Cracking

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208 18, 208 28, 208 57, 208 89, C10G 4716

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active

044419910

ABSTRACT:
Straight-chain hydrocarbons and slightly branched chain hydrocarbons are selectively converted utilizing highly siliceous porous crystalline materials of the zeolite type having SiO.sub.2 /Al.sub.2 O.sub.3 ratio of greater than 200, unique molecular sieving properties and superior resistance to ammonia deactivation. The catalyst preferably contains acidic cations and can also contain a component having a hydrogenation/dehydrogenation function. The process of this invention is particularly useful for the dewaxing of hydrocarbon oils, including removal of high freezing point paraffins from jet fuel to lower freezing point, as well as improving the octane rating of naphtha fractions.

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