Small crystal SSZ-41, its synthesis and use

Patent metadata

Field	Value
Publication number	US-12097485-B2
Application number	US-202218064336-A
Country	US
Kind code	B2
Filing date	Dec 12, 2022
Priority date	Mar 15, 2021
Publication date	Sep 24, 2024
Grant date	Sep 24, 2024

Abstract

A method is disclosed for producing small crystal, high aluminum content zincoaluminosilicate crystalline materials having the SSZ-41 framework structure. The compositions made according to that method, as well as uses of the same, are also disclosed.

First claim

The invention claimed is:

1. A zincoaluminosilicate molecular sieve having the framework structure of SSZ-41 and having a mean crystal size of 500 nm or less, wherein the zincoaluminosilicate molecular sieve has a phase purity of at least 95% by weight.

2. The zincoaluminosilicate molecular sieve of claim 1 , having a SiO 2 /Al 2 O 3 molar ratio in a range of from 30 to less than 100 and a SiO 2 /ZnO molar ratio in a range of from 15 to 75.

3. The zincoaluminosilicate molecular sieve of claim 1 , wherein the mean crystal size is in a range of 50 nm to 500 nm.

4. The zincoaluminosilicate molecular sieve of claim 1 , further comprising 1,1′-(1,4-butanediyl)bis[4-aza-1-azoniabicyclo[2.2.2]octane] dications in its pores.

5. The zincoaluminosilicate molecular sieve of claim 4 , further comprising lithium as non-exchanged extra-framework cations.

6. A process for converting a feedstock comprising an organic compound to a conversion product, the process comprising the steps of:
(i) contacting the feedstock with a catalyst, at organic compound conversion conditions, to produce an effluent containing converted product, the catalyst comprising the zincoaluminosilicate molecular sieve of claim 1 ; and
(ii) recovering converted product from the effluent.

7. The process of claim 6 , wherein the conversion process is at least one of a cracking process, a hydrocracking process, a disproportionation process, an alkylation process, an oligomerization process or an isomerization process.

Assignees

• Chevron Usa Inc

Inventors

• Zones Stacey Ian
• Chen Cong-Yan

Classifications

• C07C5/222

  with crystalline alumino-silicates, e.g. molecular sieves · CPC title

• B01J35/40

  characterised by dimensions, e.g. grain size (in a colloidal state B01J35/23; crystallite size B01J35/77) · CPC title

• C07C2529/04

  having base-exchange properties, e.g. crystalline zeolites, pillared clays · CPC title

• C07C4/06

  Catalytic processes {(C07C4/025 takes precedence)} · CPC title

• C01P2004/64

  Nanometer sized, i.e. from 1-100 nanometer · CPC title