Synthesis of chabazite-containing molecular sieves and their use in the conversion of oxygenates to olefins

US7670589B2 · kind B2 · utility

Assignee

• ExxonMobil Chemical Patents Inc. · US

Inventors

• Guang Cao · Readington, US
• Machteld M. Mertens · Boortmeerbeek, BE
• Matu J. Shah · Hackettstown, US
• Marc H. Anthonis · Hofstade, BE
• Hailian Li · Union City, US
• Anil Guram · Cupertino, US
• Robert J. Saxton · Sunnyvale, US
• Mark Muraoka · Walnut Creek, US
• Jeffrey C. Yoder · South San Francisco, US
• Anthony F. Volpe, Jr. · Sunnyvale, US

Key dates

• Filing date: Sep 14, 2006
• Grant date: Mar 2, 2010
• Expiry date: May 28, 2028

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P30/20
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The synthesis of a crystalline material, in particular, a high silica zeolite, comprising a chabazite-type framework molecular sieve is conducted in the presence of an organic directing agent having the formula:[R1R2R3N—R4]+Q−wherein R1 and R2 are independently selected from hydrocarbyl groups and hydroxy-substituted hydrocarbyl groups having from 1 to 3 carbon atoms, provided that R1 and R2 may be joined to form a nitrogen-containing heterocyclic structure, R3 is an alkyl group having 2 to 4 carbon atoms and R4 is selected from a 4- to 8-membered cycloalkyl group, optionally, substituted by 1 to 3 alkyl groups each having from 1 to 3 carbon atoms; and a 4- to 8-membered heterocyclic group having from 1 to 3 heteroatoms, said heterocyclic group being, optionally, substituted by 1 to 3 alkyl groups each having from 1 to 3 carbon atoms and the or each heteroatom in said heterocyclic group being selected from the group consisting of O, N, and S, or R3 and R4 are hydrocarbyl groups having from 1 to 3 carbon atoms joined to form a nitrogen-containing heterocyclic structure; and Q− is a anion.