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A kind of preparation method of zeolite

A technology of zeolite and symbiotic zeolite, applied in chemical instruments and methods, crystalline aluminosilicate zeolite, aluminum silicate, etc., can solve the problems of large-scale production difficulty, low product LCC, high product cost, etc., and achieve microscopic appearance The effect of richness, high thermal stability, and low SiO2 content

Active Publication Date: 2017-01-18
中铝山东新材料有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, this process does not solve the inherent high-intensity stirring problem of P zeolite industrial production, which is one of the main factors for the high cost of P zeolite industrial products and the difficulty of large-scale production.
At the same time, the way of adding water-soluble silicate further increases the cost, and the product LCC is lower than 85

Method used

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  • A kind of preparation method of zeolite
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  • A kind of preparation method of zeolite

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preparation example Construction

[0029] see Figure 1-4 , a method for preparing zeolite provided by the embodiments of the present invention, comprising:

[0030] Step 110: Obtain water glass and sodium aluminate solution to prepare seed crystals, and the ratio of the preparation system of the seed crystals is Na 2 O: SiO 2 :Al 2 o 3 :H 2 O=(1.0-5.0):(3.0-5.0):1:(50-240);

[0031] Specifically, the step 110 includes obtaining water glass and sodium aluminate solution to prepare seed crystals, and the ratio of the preparation system of the seed crystals is Na 2 O: SiO 2 :Al 2 o 3 :H 2 O=(1.0-5.0):(3.0-5.0):1:(50-240). The reaction temperature of the seed crystal preparation system using water glass and sodium aluminate solution is 70-120°C, preferably 80-100°C; the reaction time is 2-10h, preferably 4-8h.

[0032] Step 120: preparing the required preparation solution;

[0033] Specifically, the step 120 includes preparing the required preparation solution. The prepared preparation liquid includes...

Embodiment 1

[0048] (1) Seed crystal preparation: The synthetic molar ratio is as follows: 3.0Na 2 O 4.0 SiO 2 ·Al 2 o 3 ·90H 2 O. The crystallization temperature is 95°C, and the time is 6 hours; after the crystallization is completed, the crystallization mixture is suction-filtered and washed, and the filter cake is transferred to an oven for blast drying to obtain powdery seed crystals;

[0049] (2) The sintering alumina crude liquor and the crystallization mother liquor are prepared in a volume ratio of 4:3 as the aluminum source. Its chemical composition is: Al 2 o 3 =68.6g / L,Na 2 O=76g / L, αk=1.79; initial temperature 65°C.

[0050] (3) Put 110 ml of industrial concentrated water glass (26.6%, d=1.37) into a reaction vessel and heat it to 55° C. in advance. With the aid of stirring, slowly add 446ml of the preparation solution prepared in step (2) into the reactor, and at the same time add 6.75g of seed crystals, stir rapidly for 15min, and stir the slurry material evenly;

...

Embodiment 2

[0054] (1) seed crystal preparation: with embodiment 1;

[0055] (2) The sintering alumina crude liquor and the crystallization mother liquor are prepared in a volume ratio of 4:3 as the aluminum source. Its chemical composition is: Al 2 o 3 =68.6g / L,Na 2 O=76g / L, αk=1.79; initial temperature 65°C.

[0056] (3) Take 120ml of industrial concentrated water glass (26.6%, d=1.37) and put it into a reaction vessel, and heat it to 55° C. in advance. With the aid of stirring, slowly add 446ml of the preparation solution prepared in step (2) into the reactor, and at the same time add 8.2g of seed crystals, stir rapidly for 15min, and stir the slurry material evenly;

[0057] (4) Raise the temperature of the reactor to 65°C and age for 0.5h;

[0058](5) The temperature of the aged precursor was raised to 75°C for the first-stage crystallization, the crystallization time was 3h; the second-stage crystallization: 95°C, 5h; the stirring speed during the crystallization process was 50...

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Abstract

The invention discloses a zeolite preparation method, belonging to the technical field of chemical preparation. The zeolite preparation method comprises the following steps: preparing a seed crystal, introducing the seed crystal into a prepared blending liquid, fully mixing sodium silicate with the blending liquid uniformly by utilizing low-speed stirring to obtain a reaction precursor, aging the precursor, carrying out first section crystallization on the aged precursor, adjusting the temperature of a reaction tank and carrying out second section crystallization on the precursor, and then filtering, washing and quickly drying after reaction is finished to obtain P type and sodalite intergrowth zeolite with high liquid carrying capacity. The zeolite prepared by the preparation method has high liquid carrying capacity, has LCC (life cycle cost) more than 90, achieves zero discharge, is low in preparation cost and is convenient for industrial separation, drying and package.

Description

technical field [0001] The invention relates to the technical field of chemical preparation, in particular to a method for preparing zeolite. Background technique [0002] Zeolite is recognized in the prior art as a crystalline aluminosilicate, with a regular framework structure consisting of Si-O tetrahedrons and Al-O tetrahedrons sharing corners of oxygen atoms, through four-coordinated oxygen tetrahedrons Zeolites form complex and diverse structures in three-dimensional space. Different zeolites have a characteristic "cage" structure, so molecules can be screened according to the size and shape of the substance molecules. The bridging oxygen atoms in the zeolite structure are shared, considering Al 3+ The nature of the three positive charges, the Al-O tetrahedral lattice position to achieve charge balance needs to introduce other cations, for synthetic zeolites mostly Na + . Na that has been shown to tune the electronegativity of the alumina tetrahedron + It is not pa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/02C01B33/26
CPCC01B39/023C01P2002/72C01P2004/03C01P2004/61
Inventor 王尊明赵善雷马晓宁冯晓明
Owner 中铝山东新材料有限公司
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