A kind of preparation method and application of double hemispherical W zeolite

A hemispherical, zeolite technology, applied in chemical instruments and methods, inorganic chemistry, seawater treatment, etc., can solve the problems of uneven zeolite morphology, high energy consumption, high temperature, low cost, good crystallinity, and time-consuming short effect

Active Publication Date: 2020-04-17
XUCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitation of the amount of water in this method, a large number of crystal nuclei gather, which easily leads to uneven morphology of the synthesized zeolite.
In summary, the W zeolites prepared in the existing reports are generally rod-shaped, spindle-shaped, and petal-shaped, and the synthesis method has disadvantages such as high temperature, high energy consumption, and high cost.

Method used

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  • A kind of preparation method and application of double hemispherical W zeolite
  • A kind of preparation method and application of double hemispherical W zeolite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Weigh 8.42g of potassium hydroxide and 1.22g of sodium aluminate and put them into a glass container respectively, then add 57.80g of deionized water, heat and stir to dissolve the raw materials completely, and make solution A;

[0028] (2) Weigh 10.28g of silica sol, slowly add the silica sol into solution A under stirring, and continue stirring for 0.5h after the addition to form a silica-alumina gel mixture;

[0029] (3) Transfer the above-mentioned silica-alumina gel mixture to a stainless steel synthesis kettle with a polytetrafluoroethylene liner, seal it, place it in an oven, set the oven temperature to 90°C, and crystallize for 48 hours;

[0030] (4) After the reaction is completed, take out the synthesis kettle, filter the reaction mixture with suction, and wash the filter cake with deionized water until the pH of the washing solution reaches 8-9;

[0031] (5) drying the filter cake at 100°C for 24 hours to obtain the double hemispherical W zeolite of the p...

Embodiment 2

[0036] (1) Take by weighing 8.98g of potassium hydroxide and 0.78g of aluminum hydroxide and put them into a glass container respectively, then add 65.24g of deionized water, heat and stir to dissolve the raw materials completely, and make solution A;

[0037] (2) Weigh 11.34g of silica sol, slowly add the silica sol to solution A under stirring, and continue stirring for 0.5h after the addition to form a silica-alumina gel mixture;

[0038] (3) Transfer the above-mentioned silica-alumina gel mixture to a stainless steel synthesis kettle with a polytetrafluoroethylene liner, seal it, place it in an oven, set the oven temperature to 90°C, and crystallize for 48 hours;

[0039] (4) After the reaction is completed, take out the synthesis kettle, filter the reaction mixture with suction, and wash the filter cake with deionized water until the pH of the washing solution reaches 8-9;

[0040] (5) drying the filter cake at 100°C for 24 hours to obtain the double hemispherical W zeoli...

Embodiment 3

[0043] (1) Take 9.78g of potassium hydroxide and 3.22g of aluminum sulfate and put them into a glass container respectively, then add 65.56g of deionized water, heat and stir to dissolve the raw materials completely, and make solution A;

[0044] (2) Weigh 12.30 g of silica sol, slowly add the silica sol to solution A under stirring, and continue stirring for 0.5 h after the addition to form a silica-alumina gel mixture;

[0045] (3) Transfer the above-mentioned silica-alumina gel mixture to a stainless steel synthesis kettle with a polytetrafluoroethylene liner, seal it, place it in an oven, set the oven temperature to 90°C, and crystallize for 48 hours;

[0046] (4) After the reaction is completed, take out the synthesis kettle, filter the reaction mixture with suction, and wash the filter cake with deionized water until the pH of the washing solution reaches 8-9;

[0047] (5) drying the filter cake at 100°C for 24 hours to obtain the double hemispherical W zeolite of the pr...

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Abstract

The invention discloses a preparation method and application of dual-hemi-spherical W zeolite. The dual-hemi-spherical W zeolite is firstly prepared and then applied to manual simulation sea water forpotassium extraction. The reaction for preparing the dual-hemi-spherical W zeolite is carried out at a lower temperature, the conditions are moderate, and the method meets a green and chemical development requirement; a synthesis process is simple, raw materials are cheap and easy to get, short time is consumed, and the cost is low; the product has good crystallinity and high purity. The synthesized W zeolite has a dual-hemi-spherical shape, is modified to be applied to manual simulation sea water for potassium extraction, has a potassium ion exchange capacity reaching to 58.42mg / g, and has abetter application prospect.

Description

technical field [0001] The invention belongs to the technical field of preparation and application of zeolite materials, and relates to a preparation method and application of double hemispherical W zeolite. Background technique [0002] Zeolite W is an aluminosilicate crystal with an eight-membered ring main channel structure. It was first synthesized by Breck in 1953. It has an eight-membered ring channel structure. Observed along the (100) crystal plane, the eight-membered ring channel size is 0.31nm×0.35nm; observed along the (010) crystal plane, the eight-membered ring The channel size is 0.27nm×0.36nm; observed along the (001) crystal plane, the eight-membered ring channel size is 0.34nm×0.51nm and 0.33nm×0.33nm. Due to the special pore structure, slight acidity and high stability, the application of W zeolite in adsorption purification, separation and catalysis has attracted the attention of researchers. In particular, modified W zeolite has good selectivity to pota...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/46C02F1/28C02F103/08
Inventor 张旭李帅张根阳
Owner XUCHANG UNIV
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