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Method for preparing NaY zeolite

A zeolite and kaolin technology, which is applied in the directions of crystalline aluminosilicate zeolite, fajhedral crystalline aluminosilicate zeolite, etc., can solve the problems of high energy consumption, equipment corrosion, low zeolite output, etc., and achieves high whiteness, cost saving, The effect of high crystallinity

Inactive Publication Date: 2013-05-15
SHENZHEN OCEANPOWER NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the technical problems of high energy consumption, serious equipment corrosion and low zeolite yield in the prior art because the process of synthesizing Y-type zeolite with natural minerals as raw materials requires high-temperature calcination activation or pickling activation, and provides A method for preparing NaY zeolite with simple process, easy raw material preparation and low cost

Method used

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  • Method for preparing NaY zeolite

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Embodiment 1: With the flaky kaolin produced in Maoming City, Guangdong Province as raw material, its composition and the content of each component are respectively SiO 2 2 o 3 ≥38%, Fe 2 o 3 2<0.2, whiteness 88. Mix 108 grams of kaolin with 775 milliliters of 3mol / L sodium hydroxide aqueous solution, stir evenly, place in a high-pressure reactor, stir at 200°C for 5 hours, then cool down to 60°C, and add 510g of silicic acid pentahydrate Sodium solids and 550ml of water are stirred for 30 minutes to make them evenly mixed, and then 120ml of NaY zeolite structure-directing agent is added, which can increase the speed of synthesizing NaY zeolite, shorten the synthesis time, and improve the quality of the synthesized NaY zeolite. Continue to stir for 10 minutes to make it uniform, then stand and age for 6 hours, then raise the temperature to 100°C, stir and crystallize for 24 hours, filter and wash the crystallized product, and then dry at 100°C for 2 hours to obtain N...

Embodiment 2

[0034] Embodiment 2: the kaolin raw material that adopts is the same as embodiment 1, and the sodium hydroxide aqueous solution of 108g kaolin prepared and 775ml3mol / L is mixed, stirs evenly. Place in a high-pressure reactor, stir at 250°C for 5 hours, then cool down to 60°C, add 675g of sodium silicate pentahydrate solid and 550ml of water, stir for 30 minutes to make it uniform, and then add 120ml of NaY zeolite structure directing agent, Continue to stir for 10 minutes to make it uniform, let it stand for aging for 6 hours, then raise the temperature to 100° C., and crystallize with stirring for 24 hours. The crystallized product is then filtered, washed, and then dried at 100° C. for 2 hours to obtain the finished NaY zeolite. The product is detected by "X-ray diffraction analysis", and the crystallinity of the sample is 88%, and the whiteness is 90%.

Embodiment 3

[0035] Embodiment 3: the kaolin raw material that adopts is the same as embodiment 1, the sodium hydroxide aqueous solution of 108g kaolin prepared and 580ml3mol / L is mixed, stirs evenly. Place in a high-pressure reactor, stir at 200°C for 5 hours, then cool down to 60°C, add 510g of sodium silicate pentahydrate solid and 750ml of water, stir for 30 minutes to make it uniform, then add 120ml of NaY zeolite structure directing agent, Continue to stir for 10 minutes to make it uniform, leave it to age for 6 hours, then raise the temperature to 100°C, stir and crystallize for 24 hours, then filter and wash the crystallized product, and then dry it at 100°C for 2 hours, that is Get NaY zeolite finished product. The product is detected by "X-ray diffraction analysis", and the crystallinity of the sample is 85%, and the whiteness is 90%.

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Abstract

The utility model discloses a method for preparing NaY zeolite, and solves the technical problems in the prior art that the energy consumption is high, equipment is severely corroded, the zeolite output is low, the environment is polluted, and the like, which are caused during NaY zeolite preparation. Therefore, the invention provides a novel method for preparing the NaY zeolite and adopts the technical scheme that the novel method comprises the following steps: raw materials are prepared; kaolin is ground and processed to 300 meshes below; activating treatment is conducted by using high temperature lye; a die is adjusted; a zeolite structure directing agent is added; standing and ageing are conducted; crystallization is conducted; and then filtration, washing and drying are conducted. Through the adoption of the technical scheme provided by the invention, the problems in the prior art are solved, and the technical effects that the energy consumption is low during preparation, the cost is low, the raw material is easy to manufacture, no pollution is caused, instruments and the equipment cannot be damaged, and the like are achieved.

Description

technical field [0001] The invention relates to the field of inorganic nonmetal, in particular to a preparation method of zeolite. Background technique [0002] Y-type zeolite has an extremely important application in the field of petrochemical industry. The composition of NaY zeolite is Na 56 [Al 56 Si 136 o 384 ]·250H 2 O belongs to the cubic crystal system. Its structure is composed of a large nearly spherical cage structure with a pore diameter of 1.3nm. The cages are connected by twelve-membered rings to form an open channel system with a pore diameter of 0.74nm. Y-type zeolite has excellent thermal stability, acid and alkali corrosion resistance, and outstanding performance in adsorption, ion exchange, and catalysis. [0003] The quality of the product obtained by the pure chemical raw material method is good, but the cost is high, which is not conducive to large-scale industrial production; the current industrial production of NaY molecular sieves basically adop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/24
Inventor 宋科何唯平
Owner SHENZHEN OCEANPOWER NEW MATERIALS TECH