Rare earth--ZSM-5/ZSM-11 cocrystalline zeolite

US5869021A · kind A · utility

Assignees

• CHINA PETROCHEMICAL CORPORATION
• DALIAN INSTITUTE OF CHEMICAL PHYSICS, CHINESE ACADEMY OF SCIENCES · CN
• Fushun Petrochemical Company of Sinopec · CN

Inventors

• Oingxia Wang · 东风镇, CN
• Shurong Zhang · 东风镇, CN
• Guangyu Cai · 东风镇, CN
• Feng Li · Auburn, US
• Longya Xu · 东风镇, CN
• Zuxian Huang · 东风镇, CN
• Yuying Li · 东风镇, CN

Key dates

• Filing date: Dec 19, 1995
• Grant date: Feb 9, 1999
• Expiry date: Dec 19, 2015

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S423/29
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A rare earth-containing zeolite with a cocrystalline structure of ZSM-5 and ZSM-11, wherein the weight ratio of the moiety having the crystalline structure of ZSM-5 to the moiety having the crystalline structure of ZSM-11 is 0.1 to 10, which has, in the sodium form, the X-ray diffraction pattern set forth in Table 1, and in its originally synthesized anhydrous state, a chemical formula in terms of mole ratios of oxides as follows: 0.1-1.0 Na.sub.2 O.0.01-1.0 RE.sub.2 O.sub.3.Al.sub.2 O.sub.3.20-300 SiO.sub.2. Said zeolite has good acid hydrothermal stability and resistance against impurity contamination, and is useful as catalyst in various hydrocarbon conversions.