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Method for synthesizing GME zeolite molecular sieve

A technology of zeolite molecular sieve and synthesis method, which is applied in the synthesis field of GME type zeolite molecular sieve, can solve the problems such as high synthesis cost of GME zeolite, and achieve the effects of low cost and environmental protection.

Active Publication Date: 2015-03-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is the high cost of GME ze

Method used

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  • Method for synthesizing GME zeolite molecular sieve

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] With 1.0 grams of NaF, 2.29 grams of 30% aqueous sodium hydroxide solution, 7.14 grams of 50% PEG 300 (polyethylene glycol with an average molecular weight of about 300) solution, 10.4 grams of water, 0.78 grams of sodium metaaluminate and The 40% silica sol solution of 7.14 grams is mixed homogeneously, and the molar proportion of gained mixture is:

[0024] 10SiO 2 : Al2O3: 5.0NaF: 2.8Na 2 O: 2.5PEG300: 140H 2 o

[0025] Move the above mixture into the reactor at 105 o C was crystallized for 120 hours, washed and dried after the reaction, and was identified as a molecular sieve with a GME structure by XRD (see figure 1 ), the content of impurities is less than 1%, and no CHA-type zeolite is found in the product.

[0026]

Embodiment 2

[0028] With 0.5 grams of NaF, 2.29 grams of 30% sodium hydroxide aqueous solution, 7.14 grams of 50% PEG 300 (polyethylene glycol with an average molecular weight of about 300) solution, 10.4 grams of water, 0.78 grams of sodium metaaluminate and The 40% silica sol solution of 7.14 grams is mixed homogeneously, and the molar proportion of gained mixture is:

[0029] 10SiO 2 : Al2O3: 2.5NaF: 2.8Na 2 O: 2.5PEG300: 140H 2 o

[0030] Move the above mixture into the reactor at 105 o C was crystallized for 120 hours. After the reaction was completed, after washing and drying, the main product was identified by XRD as a molecular sieve with a GME structure, and its purity was 98%. No CHA-type zeolite was found in the product.

[0031]

Embodiment 3

[0033] With 1.0 grams of NaF, 2.29 grams of 30% aqueous sodium hydroxide solution, 14.28 grams of 50% PEG 300 (polyethylene glycol with an average molecular weight of about 300) solution, 10.4 grams of water, 0.78 grams of sodium metaaluminate and The 40% silica sol solution of 7.14 grams is mixed homogeneously, and the molar proportion of gained mixture is:

[0034] 10SiO 2 : Al2O3: 5.0NaF: 2.8Na 2 O: 5.0PEG300: 140H 2 o

[0035] Move the above mixture into the reactor at 105 o C was crystallized for 120 hours. After the reaction, after washing and drying, the main product was identified by XRD as a molecular sieve with a GME structure, and its purity was 92%. No CHA-type zeolite was found in the product.

[0036]

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Abstract

The invention relates to a method for synthesizing a GME zeolite molecular sieve. The problems in the prior art that the GME zeolite synthesizing cost is high and symbiotic CHA zeolite exists in the product are mainly solved. The method for synthesizing GME zeolite molecular sieve disclosed by the invention comprises the following steps: uniformly mixing a silicon source, an aluminum source, an alkaline substance A, polyethylene glycol, alkali metal salt S and water according to an initial molar ratio of 10SiO2:(0.5-4.5)Al2O3:(2.0-3.5) alkaline substance A:(0.5-5.0)polyethylene glycol:(0-5.0) alkali metal salt S:(80-400)H2O, thereby obtaining a mixture; performing hydrothermal crystallization on the mixture at the temperature of 95-155 DEG C for 20-200 hours, washing and drying the product, thereby obtaining the GME zeolite molecular sieve. According to the technical scheme, the technical problems are well solved, and the method can be used for industrial production of the GME type molecular sieve.

Description

technical field [0001] The invention relates to a method for synthesizing a GME type zeolite molecular sieve. Background technique [0002] Zeolite molecular sieve is a crystalline silicate material, in which silicon element can also be partially replaced by other elements, especially some trivalent or tetravalent elements such as Al, B, Ga, Ge, etc., because zeolite molecular sieve has a regular pore structure , has the advantages of geometric selectivity to specific molecules, and easy modulation of chemical properties, so it has a wide range of applications in the fields of catalysis, adsorption, and ion exchange. [0003] Zeolites often exist in nature in a natural state, but for most natural zeolites, they often coexist with other zeolites or other minerals, which brings difficulties to their application. At present, many zeolites can be obtained through artificial synthesis, and artificial synthesis can also obtain some zeolites that have not been found in nature, thu...

Claims

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Application Information

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IPC IPC(8): C01B39/48C01B39/04
CPCC01B39/48C01P2002/72
Inventor 袁志庆陶伟川何欣滕加伟
Owner CHINA PETROLEUM & CHEM CORP
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