Mineral oils: processes and products – Chemical conversion of hydrocarbons – Cracking
Patent
1985-11-25
1988-07-19
Davis, Curtis R.
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Cracking
208111, 208134, 208213, 208254H, 568591, 585467, 585480, 585481, 585475, 585750, C10G 4712, C07C 268, C07C 522, C07C 513
Patent
active
047583274
ABSTRACT:
A process for producing a thermally shock calcined crystalline silica comprising (A) precalcining a crystalline silica at a relatively low temperature, (B) very rapidly increasing the temperature of the crystalline silica to a relatively high temperature for a short period of time, and (C) rapidly cooling the crystalline silica. The resulting crystalline silica is catalytically active for hydrocarbon conversion reactions and is particularly selective for the production of para-xylene from a reaction mix of toluene and a methylating agent.
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Davis Curtis R.
Finkle Yale S.
Sandford Dean
Union Oil Company of California
Wirzbicki Gregory F.
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