Preparation method of modified Y-type molecular sieve

A molecular sieve and modification technology, applied in separation methods, chemical instruments and methods, and dispersed particle filtration, etc., can solve the problems of high energy consumption, high temperature, and incomplete adsorption, and achieve lower desorption temperature, lower energy consumption, The effect of increased processing costs

Inactive Publication Date: 2017-01-11
霍普科技(天津)股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The adsorption effect of molecular sieves in the prior art is only 80%, and cannot be completely adsorbed, and the temperature required for desorption is high and the energy consumption is large

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) mixing NaY molecular sieve, alkali and water according to the mass ratio of 1:0.5:10, beating the aqueous solution of molecular sieve and alkali, and carrying out alkali treatment on molecular sieve under the temperature condition of 80-120° C. for 5 hours;

[0019] (2) The alkali-treated Y-type molecular sieve obtained in step (1) is subjected to ion exchange, and the dry basis of the molecular sieve is added to a Ca salt solution with a concentration of 0.5mol / L, and the molar ratio of the molecular sieve to calcium is 1:1,80 Stir at ~100°C for 4~10h,

[0020] (3) Filter the molecular sieve obtained in step (2), perform hydrothermal calcination at 500-600° C. for 1-2 hours, and repeat steps (2) and (3) to obtain a modified Y-type molecular sieve.

[0021] The alkali in the step (1) is sodium hydroxide or sodium metaaluminate.

[0022] In the step (1), the molecular sieve is subjected to alkali treatment, then filtered, and the filter cake is washed several times ...

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Abstract

The invention discloses a preparation method of a modified Y-type molecular sieve. The preparation method is characterized in that a NaY molecular sieve, alkali and water are mixed in proportion, a water solution of the molecular sieve and alkali is beaten, and the molecular sieve is subjected to alkali treatment at the temperature of 80-120 DEG C for 5-24 h; the Y-type molecular sieve subjected to alkali treatment is subjected to ion exchange and then subjected to hydrothermal roasting at the temperature of 500-600 DEG C for 1-2 h, and the modified Y-type molecular sieve is obtained. Calcium ions are used for modifying the Y-type molecular sieve, a layer of calcium is formed on the surface of the molecular sieve through exchange of calcium and sodium, organic waste gas containing alcohol can be effectively adsorbed by means of the performance of a complex compound prepared from calcium ions and alcoholic hydroxyl groups, and the dissociation temperature of the complex compound is lower, so that the desorption temperature of the molecular sieve is reduced, and the energy consumption of an enterprise is reduced during treatment of waste gas.

Description

technical field [0001] The invention belongs to the field of molecular sieve preparation, and in particular relates to a preparation method of a modified Y-type molecular sieve. Background technique [0002] The zeolite rotor adsorption concentration device adopts three continuous procedures of adsorption-desorption-concentration and incineration, and is mainly used for the treatment of organic waste gas; it is especially suitable for large air volume and low concentration occasions. The adsorption device uses ceramic fiber as the base material to make a large honeycomb disc wheel system. The surface of the wheel is coated with hydrophobic zeolite as the adsorbent. Therefore, the type and nature of zeolite, that is, molecular sieve, directly determine the treatment effect of organic waste gas. . Research on the modification technology of molecular sieve materials, including changing the pore structure and surface polarity of molecular sieves, obtaining Y-type molecular siev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/24B01D53/82B01D53/72B01D53/06B01D46/00B01J20/18B01J20/30
CPCB01D53/06B01D53/72B01D53/82B01J20/18C01B39/24B01D2257/704B01D2257/2045B01D2251/404B01D46/62
Inventor 孙浩
Owner 霍普科技(天津)股份有限公司
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