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Transition-metal-including crystal-structure mesoporous molecular sieve Cry-Fe and preparation method thereof

A mesoporous molecular sieve, transition metal technology, applied in molecular sieve catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of poor hydrothermal stability and limited application of mesoporous molecular sieves

Inactive Publication Date: 2015-09-23
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The pore walls of mesoporous molecular sieves are in an amorphous state, resulting in poor hydrothermal stability of mesoporous molecular sieves. Although the invention of SBA-15 series molecular sieves has solved this problem to a certain extent, the amorphous pores of mesoporous molecules wall still limits its application in industry

Method used

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  • Transition-metal-including crystal-structure mesoporous molecular sieve Cry-Fe and preparation method thereof
  • Transition-metal-including crystal-structure mesoporous molecular sieve Cry-Fe and preparation method thereof
  • Transition-metal-including crystal-structure mesoporous molecular sieve Cry-Fe and preparation method thereof

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Embodiment 1

[0026] The template used in the synthesis of molecular sieve is cetyltrimethylammonium bromide (CTAB) as an example, the heteroatom source is ferric nitrate as an example, the silicon source used is silica as an example, and the inorganic base used is alkali metal hydrogen. Oxide as an example; the acid used is an inorganic strong acid; the water used is deionized water; the reagents used are all analytical reagents; the X-ray diffraction measurement of the obtained product is the powder crystal diffraction test, and the instrument used is Japan Rigaku D / max-RA X-ray diffractometer, voltage 30 kV, current 30 mA, scanning range 3-70 °; the content of metal in the finished product was determined by X-ray fluorescence spectrometry, the instrument used was Philips Magix-601 fluorescence diffractometer ; The high-power transmission microscope test was carried out using Jem-3010, and the acceleration voltage was 200 KV; the pore volume, pore diameter, and specific surface properties o...

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Abstract

The invention relates to a transition-metal-including crystal-structure mesoporous molecular sieve Cry-Fe and a preparation method thereof. The mesoporous molecular sieve Cry-Fe with a crystal structure is prepared through a one-step method by using a complex of a long-chain surfactant molecule and a metal coordination compound as a template agent. The material of the molecular sieve provided by the invention has a regular crystal structure, a higher metal content, a multi-active-site center, larger specific surface area and pore volume, favorable heat and hydrothermal stability, and moreover, can be used as a catalyst for catalytic cracking, catalytic oxidation and catalytic isomerization.

Description

Technical field [0001] The invention belongs to the field of molecular sieve synthesis, and specifically relates to a crystal structure mesoporous molecular sieve Cry-Fe containing transition metals and a preparation method through one-step hydrothermal synthesis. Background technique [0002] Microporous molecular sieves have uniform pore size distribution and high catalytic activity, and are widely used as catalysts in various heterogeneous catalytic reactions in industry. However, the small pore channels (less than 0.8 nm) and cage size (generally less than 1.5 nm) of the microporous molecular sieve limit its application in the catalytic reaction of macromolecules. In 1992, scientists from Mobil Corporation invented the M41S series of mesoporous molecular sieves, expanding the application range of molecular sieve materials in the field of macromolecular catalysis. The pore walls of mesoporous molecular sieves are in an amorphous state, resulting in poor hydrothermal stability...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/08B01J29/88
Inventor 李保山秦静
Owner BEIJING UNIV OF CHEM TECH