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Hydrophobic modification method for Y-shaped molecular sieve

A technology of hydrophobic modification and molecular sieve, which is applied in the directions of eighthedral crystalline aluminosilicate zeolite, crystalline aluminosilicate zeolite, etc., can solve the problems of poor effect and complicated hydrophobic modification method of Y-type molecular sieve, and achieves easy operation, The effect of overcoming uneven product properties and reducing labor intensity

Active Publication Date: 2013-08-28
广东科艺普实验室设备研制有限公司 +3
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Problems solved by technology

[0008] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a method for hydrophobic modification of Y-type molecular sieves, aiming to solve the problem that the method for hydrophobic modification of Y-type molecular sieves is complicated and the effect is not good

Method used

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Embodiment 1

[0044] Evenly spread and disperse the NaY molecular sieve baked at 400-500°C for 2 hours in the quartz wool, then put the quartz wool into the reaction furnace vertically,

[0045] SiCl at room temperature by bubbling 4 Saturated N 2 into the reaction furnace, the initial temperature of the reaction furnace is set at 250°C, the heating rate is 6k / min, the final reaction temperature is 500°C, and the reaction time is 60 minutes. After the reaction, continue to pass N 2 30 minutes, then the molecular sieves were cooled to room temperature (the product obtained thus far is called Product B). Remove the molecular sieve and wash it with deionized water until the filtrate is free of Cl - , and then put the molecular sieve into the hydrochloric acid solution with a concentration of 1mol / L, and reflux at 100°C for 1 hour under stirring conditions (the product obtained so far is called product C). Dry the obtained product, continue to wrap it with quartz wool and put it vertically ...

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Abstract

The invention discloses a hydrophobic modification method for a Y-shaped molecular sieve. The method comprises the following steps: A, uniformly paving and dispersing the Y-shaped molecular sieve in silica wool, then placing the silica wool in a reaction furnace, wherein the Y-shaped molecular sieve is processed through baking for 2 hours at a temperature of 400-550 DEG C; B, introducing mixed gas comprising N2 and SiCl4 gas to the Y-shaped molecular sieve in the step A to carry out a reaction, wherein the reaction temperature is 300-600 DEG C, the reaction time is 30-180 minutes; C, taking the molecular sieve product from the step B, then washing the product through deionized water until no Cl<-> exists in the filtrate, and then washing the product through an acid; D, drying the resulting product from the step C, continuously packing the product through the silica wool, then placing the silica wool into the reaction furnace to carry out the reaction with water vapor having the temperature of 600-900 DEG C, wherein the reaction time is 2-12 hours. The hydrophobic modification method provided by the present invention has the following advantages that: the method is a convenient gasphase dealuminzation and silicon reinsertion method; with the method, the prepared molecular sieve has uniform silica alumina ratio, the solid particles are not easy to be aggregated to form the blocks.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a method for hydrophobically modifying a Y-type molecular sieve. Background technique [0002] In recent years, with the rapid development of the economy, a large amount of industrial organic waste gas has been discharged, which has reduced the quality of the atmospheric environment, caused harm to human health, and caused huge losses to the national economy. Therefore, it is necessary to increase the treatment of organic waste gas. At present, the methods widely used to control organic waste gas mainly include thermal destruction method, condensation method, absorption method and adsorption method, among which the adsorption method is mainly used in the treatment of low concentration and high flux volatile organic compounds. As an efficient adsorption material, molecular sieves are widely used in the adsorption method to treat organic waste gas, especially the hydrophobic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/24
Inventor 刘佛傍刘俊文刘冬薇李军张干邹世春
Owner 广东科艺普实验室设备研制有限公司
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