Crystalline zeolite HP
AssigneeTexaco Inc.
InventorJohn H. Estes
Life of this patent
Estimating the term…
Abstract
A novel crystalline zeolite composition is prepared by conducting the hydrothermal crystallization and, preferably, a preliminary aging step, at high pressure, i.e. pressures in excess of 20,000 psig (ca 138 MPa) and preferably above about 40,000 psig (ca 276 MPa megaPascals). The crystalline zeolite, designated zeolite HP, has a higher aluminum content than zeolite X and a lattice constant of above about 25.02 A.
Claims8
A hydrocarbon conversion process which comprises contacting a hydrocarbon charge under catalytic cracking conditions with a synthetic crystalline aluminosilicate, zeolite HP, having a lattice constant above about 25.02 A and an atom ratio of Si to Al in the unit cell below 1.0.
A hydrocarbon conversion process which comprises contacting a hydrocarbon charge under catalytic cracking conditions with the synthetic crystalline aluminosilicate, zeolite HP, said zeolite HP having been prepared by a process which comprises:
- (a) forming an aqueous mixture of sodium aluminosilicate having a composition sufficient to establish a ratio of silicon atoms to aluminum atoms of between about 0.25 and about 1.0;
- (b) maintaining said aqueous mixture at a pressure above 20,000 psig (ca. 138 MPa) and a temperature of 150.degree.-350.degree. F. (65.6.degree.-176.7.degree. C.) for at least three hours thereby forming crystalline zeolite comprising zeolite HP;
- and
- (c) recovering said crystalline comprising zeolite HP.
Dependencies are inferred from the claim text.