Patent ID: 11865527
Assignee: CHEVRON U.S.A. INC.
Field: Chemical engineering (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 7:
8. A method of making a hydroisomerization catalyst according to claim 1, the method comprising:
forming a mixture comprising a molecular sieve belonging to the ZSM-48 family of zeolites and an inorganic oxide, wherein the molecular sieve comprises:
a silicon oxide to aluminum oxide mole ratio of about 40 to about 220;
at least about 70% polytype 6 of the total ZSM-48-type material present in the product; and
an additional EUO-type molecular sieve phase in an amount of between about 0 and about 7.0 percent by weight of the total product; and
has a morphology characterized as polycrystalline aggregates comprising crystallites collectively having an average aspect ratio of between about 1 and about 8;

extruding the mixture to form an extrudate or formed particle;
drying the extrudate or formed particle; and
calcining the dried extrudate or formed particle;
wherein the method further comprises incorporating into the hydroisomerization catalyst one or more first modifiers selected from Groups 8 to 10 and one or more second modifiers selected from the group consisting of calcium (Ca), chromium (Cr), magnesium (Mg), lanthanum (La), barium (Ba), praseodymium (Pr), strontium (Sr), potassium (K) and neodymium (Nd).