A PROCESS FOR SYNTHESIZING SAPO-34 MOLECULAR SIEVE ENRICHED WITH A Si(4Al) STRUCTURE IN THE SKELETON

WIPO Patent Application WO/2008/019583

A1

A process for synthesizing SAPO-34 molecular sieve enriched with a Si(4Al) structure in the skeleton relates to molecular sieve synthesis technology, the molecular sieve synthesized by the process predominately has Si(4Al) structure in skeleton Si coordination environment. In the present process, the fluorides are added to a starting synthesis gel to control a manner in which Si enters into molecular sieve skeleton, thereby to reduce the formation of Si(0Al), Si(1Al), Si(2Al) and Si(3Al) coordination structure and to facilitate the entrance of Si into molecular sieve skeleton in Si(4Al) coordination form. The synthesized SAPO-34 molecular sieve enriched with a Si(4Al) structure is used as MTO catalyst after being baked and could improve efficiently the selectivity of ethene and propene.

XU LEI (CN)
LIU ZHONGMIN (CN)
TIAN PENG (CN)
DU AIPING (CN)
YANG LIXIN (CN)
YUAN CUIYU (CN)

PCT/CN2007/002332

February 21, 2008

August 03, 2007

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DALIAN CHEMICAL PHYSICS INST (CN)
XU LEI (CN)
LIU ZHONGMIN (CN)
TIAN PENG (CN)
DU AIPING (CN)
YANG LIXIN (CN)
YUAN CUIYU (CN)

C01B37/08; B01J29/85; C10G3/00

CN1467155A	2004-01-14
CN1659102A	2005-08-24

LIU H. ET AL.: "Synthesis of SAPO-34 Molecular Sieve Using hydrogen Fluoride and Triethylamine as Composite Template", CHINES JOURNAL OF CATALYSIS, vol. 24, no. 4, April 2003 (2003-04-01), pages 279 - 283

CHINA SCIENCE PATENT & TRADEMARK AGENT LTD. (Bldg. BTsinghua Tongfang Hi-Tech Plaza,No.1, Wangzhuang Rd.,Haidian District, Beijing 3, CN)

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