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Preparation method for porous active silica gel

A porous silica gel and active technology, which is applied in chemical instruments and methods, water/sludge/sewage treatment, water pollutants, etc., can solve the problems of poor adsorption performance, achieve good adsorption performance, increase the surface area of ​​adsorption, and reduce particle size. small diameter effect

Inactive Publication Date: 2018-10-16
长沙小新新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a preparation method of porous active silica gel to solve the technical problem that the existing silica gel has poor adsorption performance for azo dye wastewater containing sulfonic acid groups

Method used

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  • Preparation method for porous active silica gel
  • Preparation method for porous active silica gel
  • Preparation method for porous active silica gel

Examples

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Effect test

Embodiment 1

[0027] A method for preparing porous active silica gel, specifically comprising the following steps:

[0028] ① Grinding magnesium oxide, cobalt chloride and calcium chloride through a 200-mesh sieve respectively, and then preparing solutions with a concentration of 1mol / L with deionized water for subsequent use;

[0029] ②According to the number of parts by weight, take 3 parts of surfactant and add deionized water to prepare a 0.1mol / L surfactant solution, then mix with 20 parts of absolute ethanol and 15 parts of sodium silicate in turn, and stir until mixed It is enough that there is no precipitation in the solution; then the mixed solution is heated in a water bath to a temperature of 40°C, and under magnetic stirring, 15 parts of 0.5 mg / L ammonium chloride solution is added dropwise, and the dropping speed is controlled at 1ml / min. Raise the temperature of the reaction system from 40°C to 50°C, then add 2 parts of 1mol / L magnesium oxide solution and stir for 40 minutes, ...

Embodiment 2

[0034] A method for preparing porous active silica gel, specifically comprising the following steps:

[0035] ① Grinding magnesium oxide, cobalt chloride and calcium chloride through a 200-mesh sieve respectively, and then preparing solutions with a concentration of 1mol / L with deionized water for subsequent use;

[0036] ②According to parts by weight, take 5 parts of surfactant and add deionized water to prepare 0.1mol / L surfactant solution, then mix with 30 parts of absolute ethanol and 20 parts of sodium silicate in turn, and stir until mixed There is no precipitation in the solution; then the mixed solution is heated in a water bath to a temperature of 40°C, and 40 parts of 0.5 mg / L ammonium chloride solution is added dropwise under magnetic stirring, and the dropping speed is controlled at 1ml / min. Raise the temperature of the reaction system from 40°C to 50°C, then add 3 parts of 1mol / L magnesium oxide solution and stir for 40 minutes, then lower the temperature from 50°...

Embodiment 3

[0041] A method for preparing porous active silica gel, specifically comprising the following steps:

[0042] ① Grinding magnesium oxide, cobalt chloride and calcium chloride through a 200-mesh sieve respectively, and then preparing solutions with a concentration of 1mol / L with deionized water for subsequent use;

[0043] ②According to parts by weight, take 4 parts of surfactant and add deionized water to prepare 0.1mol / L surfactant solution, then mix with 25 parts of absolute ethanol and 16.5 parts of sodium silicate in turn, and stir until mixed It is enough that there is no precipitation in the solution; then the mixed solution is heated in a water bath to a temperature of 40°C, and under magnetic stirring, 33 parts of 0.5 mg / L ammonium chloride solution is added dropwise, and the dropping speed is controlled at 1ml / min. Raise the temperature of the reaction system from 40°C to 50°C, then add 2.5 parts of 1mol / L magnesium oxide solution and stir for 40 minutes, then lower t...

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Abstract

The invention provides a preparation method for porous active silica gel, and relates to the technical field of silica gel production. In order to solve a technical problem that current silica gel haspoor adsorption performance for azo dye wastewater containing sulfonic acid groups. The method provided by the invention utilizes a precipitating method to prepare porous silica gel by using sodium silicate and ammonium chloride as raw materials, and the obtained porous silica gel is modified by utilizing pectin modified by an amino acid to obtain the porous active silica gel; and the prepared porous active silica gel has the effects of a quick adsorption speed, strong adsorption capacity and a high repeated utilization rate compared with conventional silica gel.

Description

technical field [0001] The invention relates to the technical field of silica gel production, in particular to a method for preparing porous active silica gel. Background technique [0002] Most of the direct dyes are azo dyes containing sulfonic acid groups, soluble in water, and the molecules contain linear conjugated double bond long chains, and the entire molecule including the aromatic nucleus is on the same plane. It has a strong affinity for fibers (mainly hydrogen bond and van der Waals force) can directly dye fibers in weak alkaline or neutral solution. In recent years, it has been widely used in the dyeing and printing of textile fibers. [0003] Azo dyes account for more than 80% of dyes. They are the dyes with the most complete chromatogram, the widest application and low price. They are also typical fine chemical products. The organic components of wastewater are complex and highly toxic. In addition, azo dyes Due to the characteristics of various products, sm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F101/30C02F101/34C02F101/38
CPCB01J20/103B01J20/22B01J20/24B01J20/26C02F1/288C02F2101/308C02F2101/34C02F2101/38C02F2101/40
Inventor 不公告发明人
Owner 长沙小新新能源科技有限公司
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