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Method for synthesizing molecular sieve by solid phase grinding

A technology of solid phase grinding and molecular sieve, which is applied in the direction of molecular sieve characteristic silicoaluminophosphate, molecular sieve and alkali-exchange phosphate, etc., can solve the problem of amine volatilization, achieve simplified synthesis steps, reduce production costs, and have great industrial application prospects Effect

Active Publication Date: 2014-06-18
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there is a patent for solid-phase synthesis of SAPO-34, but there is no solid-phase synthesis of SAPO-11, and the disadvantage of solid-phase synthesis of SAPO-34 is that the amine added during the grinding process is easy to volatilize

Method used

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  • Method for synthesizing molecular sieve by solid phase grinding
  • Method for synthesizing molecular sieve by solid phase grinding
  • Method for synthesizing molecular sieve by solid phase grinding

Examples

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Embodiment 1

[0028] Embodiment 1: the preparation of di-n-propylamine phosphate

[0029] Drop phosphoric acid into di-n-propylamine, di-n-propylamine:phosphoric acid ratio is 0.8:1, then add an appropriate amount of absolute ethanol, the added absolute ethanol: phosphoric acid ratio is 1:1, stir for 2 hours at 0 degrees Celsius, A white solid was obtained, and the residual reactants on the solid were washed away with a mixture of ether and ethanol, and finally the washed white solid was dried to obtain di-n-propylamine phosphate.

Embodiment 2

[0030] Embodiment 2: the preparation of di-n-propylamine phosphate

[0031] Add phosphoric acid dropwise into di-n-propylamine, di-n-propylamine:phosphoric acid ratio is 1.4:1, then add an appropriate amount of absolute ethanol, the added absolute ethanol: phosphoric acid ratio is 1:1, stir for 2 hours at 0°C, A white solid was obtained, and the residual reactants on the solid were washed away with a mixture of ether and ethanol, and finally the washed white solid was dried to obtain di-n-propylamine phosphate.

Embodiment 3

[0032] Embodiment 3: the preparation of di-n-propylamine phosphate

[0033] Drop phosphoric acid into di-n-propylamine, di-n-propylamine: phosphoric acid ratio 1.1:1, then add appropriate amount of absolute ethanol, added absolute ethanol: phosphoric acid ratio 1:1, stir for 2 hours at 0 degrees Celsius, A white solid was obtained, and the residual reactants on the solid were washed away with a mixture of ether and ethanol, and finally the washed white solid was dried to obtain di-n-propylamine phosphate.

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Abstract

The invention relates to a preparation method of a molecular sieve, and aims to provide a method for synthesizing a molecular sieve by solid phase grinding. The method for synthesizing the molecular sieve by solid phase grinding comprises the following steps: weighing and pouring a silicon source, an aluminum source and a self-made template into a mortar, and uniformly grinding and filling into a reaction kettle for crystallization; cooling a crystallization product obtained after the crystallization, and then washing and drying to obtain molecular sieve original powder; and roasting the molecular sieve original powder to obtain the molecular sieve. The method provided by the invention can prepare the SAPO-11 molecular sieve with greater degree of crystallinity. The synthetic line just relates to mixing of primary raw materials, so that the synthetic steps are greatly simplified compared with conventional method, the yield and a single kettle utilization ratio are greatly improved. Thus, the production cost is greatly lowered, and the energy is saved and emission is reduced. The method has a huge industrial application prospect.

Description

technical field [0001] The invention relates to a method for preparing molecular sieves, in particular to a method for synthesizing molecular sieves through solid phase grinding. Background technique [0002] Silicon aluminum phosphate molecular sieve (SAPO-n) is another new type of molecular sieve material developed by United Carbide Corporation (U.C.C) in the early 1980s after aluminum phosphorus molecular sieve (AlPO-n). The framework of SAPO-n consists of SiO 2 , AlO 2 - 、PO 2 + Composed of three tetrahedral basic units, the skeleton of the originally electrically neutral AlPO-n molecular sieve has exchangeable charges, forming a proton acidity similar to that of silicon-aluminum molecular sieves, while having the thermal stability and water resistance of AlPO-n molecular sieves. thermal stability. Therefore, SAPO-n molecular sieves have been widely used in the field of catalytic industry due to their excellent physical and chemical properties. Since molecular sie...

Claims

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Application Information

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IPC IPC(8): C01B37/08C01B39/54
Inventor 孟祥举金银樱孙琦盛娜肖丰收
Owner ZHEJIANG UNIV