Synthesis method of silicoaluminophosphate (SAPO) molecular sieve with CHA structure and catalyst prepared thereby

A synthesis method and molecular sieve technology, which can be applied to molecular sieve catalysts, molecular sieves and base-exchanged phosphates, and hydrocarbon production from oxygen-containing organic compounds.
CN103663491AActive Publication Date: 2014-03-26中科催化新技术(大连)股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
中科催化新技术(大连)股份有限公司
Publication Date
2014-03-26

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Abstract

The invention discloses a synthesis method of silicoaluminophosphate (SAPO) molecular sieve with a CHA structure and a catalyst prepared by using the molecular. The synthesis method is characterized in that hexamethyleneimine is adopted as a structure-directing agent, and synthesis of the molecular sieve is carried out in the presence of a little amount of SAPO molecular sieve seed crystal with the CHA structure.
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Description

technical field

[0001] The invention belongs to the field of SAPO molecular sieves, and in particular relates to a synthesis method of SAPO molecular sieves with a CHA structure, and the catalytic application of the above-mentioned materials in the reaction of converting oxygen-containing compounds into low-carbon olefins. Background technique

[0002] In 1984, United Carbide Corporation (UCC) developed the SAPO molecular sieve series of silicoaluminophosphate (USP 4440871). The molecular sieve is a kind of crystalline silicoaluminophosphate, and its three-dimensional framework structure is composed of PO 2 + , AlO 2 - and SiO 2 tetrahedron composition. Among them, SAPO-34 is a chabazite-like structure, the main channel is composed of eight rings, and the orifice is 0.38nm×0.38nm. Due to its suitable acidity and pore structure, SAPO-34 molecular sieve has attracted much attention because of its excellent catalytic performance in the reaction of methanol to light olefin...

Claims

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