CHA type heteroatomic metal aluminum phosphate molecular sieve and premolding synthetic method

A metalloaluminophosphate and molecular sieve technology, which is applied in the direction of molecular sieve compounds, molecular sieve characteristic aluminum phosphate, molecular sieve catalysts, etc., can solve the problems of raw material waste, environmental pollution, etc., and achieve the effect of less usage, performance maintenance and low production cost

Inactive Publication Date: 2018-06-12
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to simplify the technical process of catalyst preparation, solve the problems of raw material waste and environmental pollution in the traditional preparation method of catalyst, and provide a method for preforming and synthesizing CHA type heteroatom metal aluminum phosphate (MeAPO-34) molecular sieve

Method used

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  • CHA type heteroatomic metal aluminum phosphate molecular sieve and premolding synthetic method
  • CHA type heteroatomic metal aluminum phosphate molecular sieve and premolding synthetic method
  • CHA type heteroatomic metal aluminum phosphate molecular sieve and premolding synthetic method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 17.35g pseudo-boehmite (78.6wt%Al 2 o 3 ) in a 250ml beaker, add 95.39g of deionized water, stir at room temperature for 30 minutes, add 36.98g of phosphoric acid with a concentration of 85wt%, stir at room temperature for 3 hours, add 1.76g of zinc acetate and stir for 30 minutes, add 6.01g of phosphoric acid 40wt% hydrofluoric acid, continue stirring for 30 minutes, add 7.68g of N-methylimidazole (1-mim), stir until uniform and evaporate to dryness at 90°C to obtain dry glue. The above dry glue is extruded into a cylindrical strip. Take 1g of molded dry glue and put it into a crystallization kettle with a polytetrafluoroethylene kettle lining, add 5g of 1-ethyl-3-methylimidazolium bromide ionic liquid into the crystallization kettle, and crystallize at 170°C for 7 sky.

[0042] After the crystallization, the synthesis kettle was cooled to room temperature, and the crystallized product was washed with deionized water and dried at 80° C. to obtain a shaped molecular ...

Embodiment 2

[0044] 17.35g pseudo-boehmite (78.6wt%Al 2 o 3 ) is placed in a 250ml beaker, add 129.23g deionized water, stir at room temperature for 30 minutes, add 66.35g of phosphoric acid with a concentration of 85wt% and 7.69g of ammonium dihydrogen phosphate with a purity of 99%, after stirring at room temperature for 3 hours, add Stir 0.06g of zinc acetate for 30 minutes, add 0.6g of 40wt% hydrofluoric acid, continue stirring for 30 minutes, add 32.92g of N-methylimidazole (1-mim), stir until uniform and evaporate at 110°C To dry to obtain dry glue. Extrude the above dry glue into clover strips. Take 1g of molded dry glue and put it into a crystallization kettle with a polytetrafluoroethylene kettle lining, add 10g of 1-ethyl-3-methylimidazolium bromide ionic liquid into the crystallization kettle, and crystallize at 230°C for 7 sky.

[0045] After the crystallization, the crystallization kettle was cooled to room temperature, and the crystallized product was washed with deionize...

Embodiment 3

[0047] 17.35g pseudo-boehmite (78.6wt%Al 2 o 3 ) in a 250ml beaker, add 44.23g of deionized water, stir at room temperature for 30 minutes, add 9.25g of phosphoric acid with a concentration of 85wt%, stir at room temperature for 3 hours, add 29.33g of zinc acetate and stir for 30 minutes, add 18.04g of phosphoric acid 40wt% of hydrofluoric acid and 1.49g of ammonium fluoride with a purity of 99%. After stirring for 30 minutes, add 1.1g of N-methylimidazole (1-mim), stir until uniform and evaporate to Dry to obtain dry glue. The above dry glue is extruded into a cylindrical strip. Take 1g of molded dry glue and put it into a crystallization kettle with a polytetrafluoroethylene kettle lining, add 5g of 1-ethyl-3-methylimidazolium bromide ionic liquid into the crystallization kettle, and crystallize at 230°C for 1 sky.

[0048] After the crystallization, the crystallization kettle was cooled to room temperature, and the crystallized product was washed with deionized water an...

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Abstract

The invention discloses a CHA type heteroatomic metal aluminum phosphate molecular sieve and a premolding synthetic method, and relates to the technical field of preparation of molecular sieves. The CHA type heteroatomic metal aluminum phosphate molecular sieve is mainly characterized by being prepared through the following steps: uniformly mixing an aluminum source, a phosphorus source, a metal source, a fluorine source, organic amine and water so as to prepare a gel, drying the gel, and carrying out molding; and subjecting the molded dry gel to crystallization at 80 to 300 DEG C for 10 min to 10 d so as to obtain a molded molecular sieve. According to the invention, an MeAPO-34 molecular sieve with a desired shape can be prepared through one step, and a preparation process for a catalystis simplified. The molded MeAPO-34 molecular sieve prepared by using the method provided by the invention can be directly used for an adsorbent or used as a catalyst carrier, and has high molecular sieve content. The method provided by the invention eliminates the molding step of the catalyst, is simple in process and has broad application prospects in the field of preparation of catalysts.

Description

technical field [0001] The invention relates to the technical field of molecular sieve synthesis, in particular to a CHA type heteroatom metal aluminum phosphate molecular sieve and a preformed synthesis method. Background technique [0002] In 1982, Union Carbide successfully synthesized a series of aluminum phosphate molecular sieves (US4310440), opening up a new field of molecular sieve materials. The skeleton of aluminum phosphate molecular sieve is formed by alternating links of aluminum-oxygen tetrahedron and phosphorus-oxygen tetrahedron, and the skeleton is electrically neutral, so it has no Acidity limits its application in the field of catalysis. In order to improve the catalytic performance of aluminum phosphate molecular sieves, metal atoms are used to replace part of the aluminum or phosphorus atoms in the framework of aluminum phosphate molecular sieves to obtain metalloaluminophosphate molecular sieves with acid centers or redox centers. Among them, the met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/54C01B37/06B01J29/83
CPCB01J29/83C01B37/065C01B39/54C01P2002/72C01P2006/16
Inventor 田志坚王苹马怀军王从新王冬娥刘浩厉晓蕾
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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