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Preparation method of sodium alginate-xanthan gum modified nano A zeolite assembly

A technology of sodium alginate and xanthan gum, applied in the direction of crystalline aluminosilicate zeolite, A-type crystalline aluminosilicate zeolite, etc., can solve the problems of high price, toxicity, non-compliance, etc., and achieve low cost, simple steps, The effect of low pollution consumption

Inactive Publication Date: 2013-09-25
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is worth pointing out that the organic templates used in the synthesis process of the corresponding nano-zeolite molecular sieve materials are not only expensive, but also have clear toxicity, which does not conform to the modern "green and low-carbon" concept

Method used

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  • Preparation method of sodium alginate-xanthan gum modified nano A zeolite assembly

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Embodiment 1

[0029] This embodiment relates to a method for preparing a sodium alginate-xanthan gum modified nano-A zeolite assembly, the method comprising the following steps:

[0030] Step 1, use a pipette to pipette 4.5ml sodium alginate solution (mass percentage concentration is 2%), 1.5ml xanthan gum mixed solution (mass percentage concentration is 2%) and 4.5ml silica sol solution (mass percentage concentration is 2%) 10%) into a 50ml polytetrafluoroethylene container, stir evenly with a glass rod to make it completely mixed, and drop 15μl potassium borohydride solution (molar concentration is 4M) into it with a pipette to obtain the initial foaming solution;

[0031] Step 2: After the dense hydrogen bubbles are formed in the initial foaming solution, immediately drop 10ml of the foaming mother solution into 100ml of calcium chloride solution (0.2M molar concentration) with a rubber dropper, and wait for the foaming microspheres After forming, filter with a funnel to obtain the foame...

Embodiment 2

[0036] This embodiment relates to a method for preparing a sodium alginate-xanthan gum modified nano-A zeolite assembly, the method comprising the following steps:

[0037] Step 1, use a pipette to pipette 4.5ml (mass percentage concentration is 0.5%) sodium alginate solution and 4.5ml xanthan gum mixed solution (mass percentage concentration is 0.5%) and 4.5ml silica sol solution (mass percentage concentration is 0.5%) 30%) into a 50ml polytetrafluoroethylene container, stir evenly with a glass rod to make it completely mixed, add 4.5μl potassium borohydride solution (molar concentration is 1M) dropwise to it with a pipette, and obtain the foaming mother liquor;

[0038] Step 2: After the dense hydrogen bubbles in the foaming mother liquor are formed, immediately drop 10ml of the foaming mother liquor into 90ml of calcium chloride solution (0.2M molar concentration) with a rubber dropper, and wait for the foaming pellets to form Afterwards, the foamed microsphere matrix was o...

Embodiment 3

[0042] This embodiment relates to a method for preparing a sodium alginate-xanthan gum modified nano-A zeolite assembly, the method comprising the following steps:

[0043] Step 1, use a pipette to pipette 3.0ml sodium alginate solution (mass percentage concentration is 1%), 1.5ml xanthan gum mixed solution (mass percentage concentration is 1%) and 2.0ml silica sol solution (mass percentage concentration is 1%) 20%) into a 50ml polytetrafluoroethylene container, stir evenly with a glass rod to make it completely mixed, add 10μl of potassium borohydride solution (3M molar concentration) dropwise with a pipette to obtain a foaming mother solution;

[0044] Step 2: After the dense hydrogen bubbles in the foaming mother liquor are formed, immediately drop 10ml of the foaming mother liquor into 80ml of calcium chloride solution (0.2M molar concentration) with a rubber dropper, and wait until the foaming pellets are formed , filtered through a funnel to obtain the foamed microsphere...

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Abstract

The invention discloses a preparation method of a sodium alginate-xanthan gum modified nano A zeolite assembly. The method comprises the following steps: 1, adding a sodium alginate solution, a xanthan gum solution and a silicon source solution in a container, stirring the obtained mixture until the solutions are completely dissolved, and adding a potassium borohydride solution into the obtained mixture so as to obtain an initial foaming liquid; 2, after bubbles are generated in the initial foaming liquid, dropwise adding the initial foaming liquid into a calcium chloride solution, and sequentially filtering, rinsing and drying the obtained object; 3, adding a foamed microsphere matrix in primary zeolite growth mother liquor to carry out hydro-thermal synthesis reaction, and filtering and rinsing the obtained product so as to obtain primarily grown A zeolite assembly microspheres; 4, adding the foamed microsphere matrix in a secondary zeolite growth mother liquor to carry out hydro-thermal synthesis reaction, and sequentially filtering, rinsing and drying on the obtained product. The method disclosed by the invention is simple in steps, low in cost and low in consumption and pollution, has a high-specific-surface-area and regular three-dimensional nanoscale molecular sieve channel, and can be applied to various fields of environment, chemical engineering, medicaments and the like.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and relates to a method for preparing a nano-A zeolite assembly based on a sodium alginate-xanthan polysaccharide microsphere matrix. Background technique [0002] The basic structure of inorganic nano-zeolite molecular sieve material is silicon oxide (SiO 4 ) tetrahedron and aluminum oxide (AlO 4 ) tetrahedron, which has the properties of short intracrystalline pores, abundant pores, adjustable surface charge, easy surface modification, and significantly improved external specific surface area. Compared with macroscopic substances, it shows special adsorption behavior, catalysis, In recent years, nano-zeolite molecular sieve materials have attracted much attention in the field of environmental protection. [0003] Recently, Amir Charkhi et al. published in "Powder Technology" entitled "Fabrication of granulated NaY zeolite nanoparticles using a new method and study the adsorption ...

Claims

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Application Information

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IPC IPC(8): C01B39/14
Inventor 徐芳牛明杰王德举张闻中曾曾王晶莹
Owner SHANGHAI JIAO TONG UNIV
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