Synthesis of molecular sieve SSZ-41

Patent metadata

Field	Value
Publication number	US-10167200-B2
Application number	US-201715729707-A
Country	US
Kind code	B2
Filing date	Oct 11, 2017
Priority date	Dec 13, 2016
Publication date	Jan 1, 2019
Grant date	Jan 1, 2019

Abstract

A method is disclosed for synthesizing zincoaluminosilicate molecular sieve SSZ-41 having high aluminum content from a combined source of silicon oxide and aluminum oxide selected from one or more a FAU framework type zeolite and a colloidal aluminosilicate.

First claim

The invention claimed is:

1. A method of synthesizing a zincoaluminosilicate molecular sieve having the framework structure of SSZ-41, the method comprising:
(a) preparing a reaction mixture comprising:
(1) a combined source of silicon oxide and aluminum oxide selected from a FAU framework type zeolite, a colloidal aluminosilicate, or a mixture thereof;
(2) a source of zinc;
(3) a source of a Group 1 or Group 2 metal (M);
(4) a structure directing agent (Q) comprising 1,1′-(1,4-butanediyl)bis-4-aza-1-azoniabicyclo[2.2.2]octane dications;
(5) hydroxide ions; and
(6) water; and

(b) subjecting the reaction mixture to crystallization conditions sufficient to form crystals of the molecular sieve;
wherein the reaction mixture has a composition, in terms of molar ratios, as follows:

SiO 2 /Al 2 O 3
60 to 90

SiO 2 /ZnO
15 to 40

M/SiO 2
0.10 to 0.30

Q/SiO 2
0.15 to 0.40

OH/SiO 2
0.15 to 0.40

H 2 O/SiO 2
 15 to 45.

2. The method of claim 1 , wherein the reaction mixture is substantially free of a separate source of intentionally added silicon oxide.

3. The method of claim 1 , wherein the reaction mixture is substantially free of a separate source of intentionally added aluminum oxide.

4. The method of claim 1 , wherein the reaction mixture further comprises seeds.

5. The method of claim 4 , wherein the reaction mixture comprises from 0.01 ppm by weight to 10,000 ppm by weight of seeds.

6. The method of claim 4 , wherein the seeds comprise a molecular sieve material having the framework structure of SSZ-41.

7. The method of claim 1 , wherein the crystallization conditions include a temperature of from 125° C. to 200° C.

Assignees

• Chevron Usa Inc

Inventors

• Zones Stacey Ian
• Chen Cong-Yan
• Lacheen Howard Steven
• Chaudhuri Kaustav

Classifications

• B01J29/74

  Noble metals · CPC title

• C01B39/48 Primary

  using at least one organic template directing agent · CPC title

• B01J29/048

  Zincosilicates, Aluminozincosilicates (B01J29/005 takes precedence) · CPC title

• B01J37/04

  Mixing {(B01J37/0009, B01J37/0018 take precedence)} · CPC title

• B01J37/30

  Ion-exchange · CPC title