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Method for preparing X-zeolite by taking quartz sand as raw material

A technology of quartz sand and zeolite, applied in the field of preparation of X-type zeolite, can solve the problems of poor product quality and high cost, and achieve the effects of reducing processes, saving energy, and avoiding interference of impurities

Inactive Publication Date: 2012-07-18
SHENZHEN OCEANPOWER NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problem in the prior art that the cost of the pure chemical raw material method is high, or the product quality is poor due to the high impurities when using natural minerals as raw materials, and to provide a quartz crystal Method for preparing X-type zeolite from sand

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: Add 360g of quartz sand, 512g of sodium hydroxide, and 1500mL of water into a sealed reactor, start the mixer at a speed of 300 rpm, raise the temperature to 180°C, and continue stirring for 4 hours; stop heating, and Cooling water makes the temperature in the reactor down to 50°C and stops stirring to obtain a clear and transparent active silicon oxide lye; then under agitation, the active silicon oxide lye is added to 2820ml of water that is dissolved with 984g of sodium metaaluminate, Stir for 30 minutes, at this moment the mol ratio of each material in the mixture is: SiO 2 : Al 2 o 3 :Na 2 O:H 2 O=3:1:4.2:120; Stir the mixture in the sealed reactor, start the mixer, adjust its rotating speed to 200 rpm, then heat up to 100°C, crystallize for 3 hours, stop heating, pass The cooling water lowers the temperature of the reactor to below 50°C, and after the stirring is stopped, the materials in the reactor are suction-filtered, washed, and then dried at 1...

Embodiment 2

[0033] Example 2: Add 360g of quartz sand, 416g of sodium hydroxide, and 1300mL of water into a sealed reactor, start the mixer at a speed of 300 rpm, raise the temperature to 200°C, and continue stirring for 4 hours; stop heating, and Cool the water to reduce the temperature in the reactor to 50°C, stop stirring, take out the reactant, and obtain a clear and transparent activated silica lye; add 328g of sodium metaaluminate and 96g of sodium hydroxide to the active silica lye In 3000ml of water, adjust the molar ratio of each material in the mixture to: SiO 2 : Al 2 o 3 :Na 2 O:H 2 O=3:1:4.2:120; after stirring for 30 minutes, move the mixture into the reaction kettle, start the mixer, adjust its speed to 200 rpm, then raise the temperature to 95°C, crystallize for 4 hours, stop heating, and The cooling water reduces the temperature of the reactor to below 50°C, and after the stirring is stopped, the materials in the reactor are suction-filtered, washed, and dried at 120°...

Embodiment 3

[0035] Example 3: Add 360g of quartz sand, 416g of sodium hydroxide, and 1300mL of water into a sealed reaction kettle, start the mixer at a speed of 300 rpm, raise the temperature to 200°C, and continue stirring for 4 hours; stop heating, and Cool the water to reduce the temperature in the reactor to 50°C, stop stirring, take out the reactant, and obtain a clear and transparent activated silicon oxide lye; then add the activated silicon oxide lye to the dissolved 282g aluminum metabolite In the 3750ml water of sodium hydroxide and 118.5g sodium hydroxide, the material molar ratio of this moment mixture is: SiO 2 : Al 2 o 3 :Na 2 O:H 2 O=3.5:1:4.9:140; stirred for 30 minutes, moved the mixture into a 10L reactor, started the mixer, adjusted its speed to 200 rpm, then raised the temperature to 100°C, crystallized for 3 hours, stopped heating, and Cool the water to reduce the temperature of the reactor to below 50°C, stop the stirring, filter the material in the reactor with...

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Abstract

The invention discloses a method fore preparing X-zeolite by taking quartz sand as a raw material. The technical scheme of the method comprises a quartz sand activation process and a hydrothermal crystallization process in turn. The technical scheme mainly comprises the following steps of: first, performing a reaction on the quartz sand and the solution of sodium hydroxide to obtain active silica-containing alkali liquor; then, mixing the obtained alkali liquor, an aluminum source, an alkali and water and adjusting a material ratio; and finally, performing hydrothermal crystallization and synthesis on an obtained mixture and obtaining the X-zeolite by filtering, washing with water and drying. The technical problem in the prior art is solved; the aims of simplifying a production process, reducing energy condirtytion and reducing production cost can be fulfilled; and simultaneously the prepared X-zeolite has the characteristics of high crystallinity, high whiteness and uniform particle size distribution.

Description

technical field [0001] The invention relates to a preparation method of zeolite, in particular to a preparation method of X-type zeolite. Background technique [0002] X-type molecular sieve belongs to the faujasite type (FAU) molecular sieve, which is a cubic crystal system, and its typical unit cell composition is Na 56 [Al 56 Si 136 o 384 ]264H 2 O, the pore size is 7.4×7.4nm, and the Si / Al ratio is generally between 1-1.5. Low-silicon X-type molecular sieve is also an important adsorbent, which is used for the adsorption, separation and purification of gases. Both the low-silicon X-type molecular sieve and the high-silicon Y-type molecular sieve are important components of the most widely used petroleum processing catalysts. At the same time, X zeolite (sodium type X zeolite) has a strong exchange ability for lead, mercury, cadmium plasma and harmful substances such as aniline and phenol, and has a good application prospect in sewage treatment. [0003] At present,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/22
Inventor 宋科赵欣平何唯平
Owner SHENZHEN OCEANPOWER NEW MATERIALS TECH
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