Method for synthesizing nano-sized zeolite molecular sieve suitable for VOCs adsorption

A synthesis method and nano-zeolite technology, applied in separation methods, nanotechnology, chemical instruments and methods, etc., can solve the problems of expensive template agent, long reaction time, unsuitable for industrial production, etc., and achieve good adsorption effect and crystallization. The effect of shortened time and super hydrophobicity

Active Publication Date: 2017-04-26
SHANGHAI NOVEL CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The templating agent used in this method is expensive, and the reaction time is too long, so it is not suitable for industrial production

Method used

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  • Method for synthesizing nano-sized zeolite molecular sieve suitable for VOCs adsorption
  • Method for synthesizing nano-sized zeolite molecular sieve suitable for VOCs adsorption
  • Method for synthesizing nano-sized zeolite molecular sieve suitable for VOCs adsorption

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1, the synthesis that is applicable to the nanometer zeolite molecular sieve of VOCs adsorption

[0037] (1), weigh 29.89mol of deionized water, 0.5mol of methyltrimethoxysilane and 0.5mol of ethyltrimethoxysilane (organosilylating agent), stir well and then add 0.6g of nonionic surfactant P123 and 0.005mol sodium fluoride, mix evenly, heat to 80±5°C, keep stirring for 4±0.5h, open the door to remove the methanol generated by hydrolysis, and obtain the pretreatment solution;

[0038] (2), add 0.01mol gallium chloride, 6.5g 70% (mass) ethylamine aqueous solution (containing 0.11mol water, 0.1mol ethylamine) to the pretreatment liquid, put into the stainless steel reaction kettle after mixing evenly, airtight 150 ℃ After crystallization for 20 h, a milky white suspension was obtained.

[0039] (3) The suspension was suction filtered, washed with 200 g of deionized water, dried at 110° C. for 6 hours, and calcined at 500° C. for 3 hours to obtain a white powder p...

Embodiment 2

[0043] Embodiment 2, the synthesis that is suitable for the nano-zeolite molecular sieve of VOCs adsorption

[0044] In step (1), the amount of deionized water is 50mol, the organic silylating agent is 0.3mol methyltrimethoxysilane and 0.7mol dimethyldimethoxysilane, and the amount of nonionic surfactant P123 is 1.8g, The amount of sodium fluoride was 0.01 mol.

[0045] In step (2), the heteroatom salt is 0.01 mol of germanium nitrate, the organic amine is 0.05 mol of propylamine, the crystallization temperature is 160° C., and the crystallization time is 40 h, and a white powder product B is prepared.

[0046] Among them, organosilylating reagents (using SiO 2 The molar ratio of sodium fluoride, inorganic heteroatom salt, templating agent and water is 1:0.01:0.01:0.05:50, P123 and organosilylating reagent (using SiO 2 The mass ratio of meter) is 0.03:1.

[0047] Measured by X-ray powder diffraction method, the white powder product B is ZSM-5 molecular sieve, the relative c...

Embodiment 3

[0048] Embodiment 3, the synthesis that is suitable for the nano-zeolite molecular sieve of VOCs adsorption

[0049] In step (1), the deionized water is 9.74mol, the organosilylating agent is 1mol diethyldimethoxysilane, the amount of nonionic surfactant P123 is 1.2g, and the amount of sodium fluoride is 0.03mol;

[0050] In step (2), the heteroatom salt is 0.01mol titanium sulfate, and the organic amine is a mixture of 7.8g 40 (mass)% methylamine aqueous solution (containing 0.1mol methylamine, 0.26mol water) and 0.1mol n-butylamine, crystallized The temperature is 140° C., the crystallization time is 100 h, and a white powder product C is prepared.

[0051] Among them: organosilylating reagents (using SiO 2 The molar ratio of sodium fluoride, inorganic heteroatom salt, templating agent and water is 1:0.03:0.01:0.2:10, and the mass ratio of P123 to organosilylating reagent (based on SiO 2 Count) is 0.02:1.

[0052] As determined by the X-ray powder diffraction method, the ...

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Abstract

The invention discloses a method for synthesizing a nano-sized zeolite molecular sieve suitable for VOCs adsorption. The method includes the following steps that firstly, water and an organosilicone alkylation solvent are added into a container according to the formula and evenly stirred, then a non-ionic surfactant P123 and sodium fluoride are added according to the formula, the materials are evenly mixed, heated and stirred to remove methyl alcohol generated through hydrolysis of the organosilicone alkylation solvent, and a pretreatment solution is obtained; secondly, inorganic heteroatom salt and a template agent are added into the pretreatment solution according to the formula to prepare a uniform gel, then the gel is transferred into a stainless steel reaction kettle for sealed hydrothermal treatment, and turbid liquid is obtained; thirdly, the turbid liquid is subjected to suction filtration, washing, drying and calcinations, and a white powder product is obtained. The product prepared through the synthesis method is the zeolite molecular sieve which is large in specific surface area and high in crystallization degree and ultrahigh in hydrophobicity, has the advantages of being simple in process and low in production cost, and is suitable for VOCs adsorption.

Description

technical field [0001] The invention belongs to the field of inorganic synthesis and catalyst preparation, and in particular relates to a synthesis method of nano zeolite molecular sieves suitable for VOCs adsorption. Background technique [0002] Zeolite molecular sieve materials are widely used in the chemical industry as catalysts, catalyst carriers, desiccants and adsorbents. According to statistics, the annual consumption of zeolite molecular sieve materials in the world has exceeded 100,000 tons. There are more than 120 types of existing zeolite molecular sieves, and the pore size extends from micropores to mesopores. Zeolite molecular sieves have large specific surface area and adsorption capacity. There are acid-base centers on the surface, and its adsorption properties can be controlled by adjusting the hydrophilicity and hydrophobicity of the material; the special electric field effect in the pores can effectively activate the reactants. A single pore size distribu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/40B82Y40/00B01D53/02
CPCB01D53/02B01D2253/108B01D2257/708C01B39/40C01P2002/72C01P2004/03C01P2004/62C01P2006/12C01P2006/90Y02A50/20
Inventor 薛招腾丁姜宏韩峰殷华夏建超文怀有谈赟
Owner SHANGHAI NOVEL CHEM TECH
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