Ferrosilicate ssz-70 molcular sieve, its synthesis and use
AssigneeChevron U.S.A. Inc.
InventorsChristopher Michael LEW, Cong-Yan CHEN, Bi-Zeng ZHAN, Stacey Ian ZONES
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Abstract
A ferrosilicate molecular sieve having the framework structure of SSZ-70 and a method of making the same is disclosed. The ferrosilicate molecular sieve can be used in processes for dewaxing paraffinic hydrocarbon feedstocks.
Claims14
A ferrosilicate molecular sieve of *-SVY framework type and, in its as-synthesized form, comprising an organic structure directing agent in its pores, wherein the organic structure directing agent is represented by Formula (1):
- wherein R and R′ are each independently selected from isopropyl, isobutyl, and cyclohexyl.
A method of synthesizing a ferrosilicate molecular sieve of *-SVY framework type, the method comprising:
- (1) preparing a reaction mixture comprising:
- (a) a source of an oxide of iron;
- (b) a source of an oxide of silicon;
- (c) a source of an alkali or alkaline earth metal (M);
- (d) an organic structure directing agent (Q);
- (e) a source of hydroxide ions;
- and
- (f) water, and the reaction mixture has a composition, in terms of molar ratios, as follows:
- SiO2/Fe2O3
- 25 to 750
- M/SiO2
- 0.05 to 0.50
- Q/SiO2
- 0.05 to 0.50
- OH/SiO2
- 0.10 to 1.00
- H2O/SiO2
- 1 to 60
- and (2) subjecting the reaction mixture to crystallization conditions sufficient to form crystals of the ferrosilicate molecular sieve;
- wherein the organic structure directing agent is represented by Formula (1):
- where R and R′ are each independently selected from isopropyl, isobutyl, and cyclohexyl.
A process for hydroisomerization of a paraffinic hydrocarbon feedstock, the process comprising:
- contacting the paraffinic hydrocarbon feedstock at hydroisomerization conditions with hydrogen and a catalyst comprising a ferrosilicate molecular sieve of *-SVY framework type, and yielding a product having an increase in branched hydrocarbons relative to hydrocarbon feedstock;
- wherein the catalyst further comprises 0.01 to 10% by weight of a noble metal.
Dependencies are inferred from the claim text.