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Method for preparing functionalized mesoporous nano-SiO2 material by using quartz sand tailings as raw material, and application of functionalized mesoporous nano-SiO2 material

A technology of quartz sand tailings and mesoporous formation is applied in the field of quartz sand tailings resource utilization, which can solve the problems of difficult disposal and discharge of quartz sand tailings, destruction of vegetation in mining areas, dust pollution, etc. The effect of good order and strong load capacity

Pending Publication Date: 2021-12-17
BENGBU COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, quartz sand tailings can be used to make building materials such as cement, glazed tiles, paints, etc., but the resource utilization of quartz sand tailings only accounts for one-tenth of the discharge, and the remaining unused tailings are discharged. The rainwater is discharged into the nearby waters, causing soil erosion, causing river blockage, causing serious damage to the vegetation in the mining area, occupying a large amount of cultivated land, and accompanied by dust pollution. The stacking and disposal of quartz sand tailings has become an environmental governance big problem
In addition, the accumulation of tailings will also cause a waste of resources, and cause huge economic losses to both the enterprise and the country

Method used

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  • Method for preparing functionalized mesoporous nano-SiO2 material by using quartz sand tailings as raw material, and application of functionalized mesoporous nano-SiO2 material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A preparation of functionalized mesoporous nano-SiO using quartz sand tailings as raw material 2 A material method comprising the following steps:

[0037] S1: Ball mill 20g of quartz sand tailings to a particle size of ≤74μm, then add it to 100mL of 1mol / L HCl solution, ultrasonic impregnation for 60min, filter and separate the solid product, and wash with deionized water three times to remove the acid Dissolved Al 3+ , Ca 2+ , and then air-dried at 100°C for 12 hours to obtain pretreated tailings powder;

[0038] S2: After mixing 10g of pretreated tailings powder and 8g of solid NaOH evenly, roasting at 300°C for 60min to obtain clinker;

[0039] S3: Add 10g of clinker to 60mL of deionized water, mix well, then stir and react in a water bath at 40°C for 60min, filter with suction, keep the filtrate, and wash the filter residue with deionized water for 3 times, keep the washing solution, each time washing, Control the dosage ratio of deionized water and filter resi...

Embodiment 2

[0043] A preparation of functionalized mesoporous nano-SiO using quartz sand tailings as raw material 2 A material method comprising the following steps:

[0044] S1: Ball mill 20g of quartz sand tailings to a particle size of ≤74μm, then add it to 100mL of 1.5mol / L HCl solution, ultrasonically impregnate it for 90min, filter and separate the solid product, and wash it with deionized water for 4 times. Removal of acid leached Al 3+ , Ca 2+ , and then air-dried at 110°C for 12 hours to obtain pretreated tailings powder;

[0045] S2: After mixing 10g of pretreated tailings powder with 9g of solid NaOH, roasting at 600°C for 15-120min to obtain clinker;

[0046] S3: Add 10g of clinker to 60mL of deionized water, mix well, then stir and react in a water bath at 50°C for 90min, filter with suction, keep the filtrate, then wash the filter residue with deionized water for 3 times, keep the washing solution, each time washing, Control the dosage ratio of deionized water and filter...

Embodiment 3

[0050] A preparation of functionalized mesoporous nano-SiO using quartz sand tailings as raw material 2 A material method comprising the following steps:

[0051] S1: Ball mill 20g of quartz sand tailings to a particle size of ≤74μm, then add it to 100mL of 2mol / L HCl solution, ultrasonic impregnation for 90min, filter and separate the solid product, and wash it with deionized water 4 times to remove the acid Dissolved Al 3+ , Ca 2+ , and then air-dried at 120°C for 12 hours to obtain pretreated tailings powder;

[0052] S2: Mix 10g of pretreated tailings powder with 9.5g of solid NaOH, and roast at 800°C for 120min to obtain clinker;

[0053] S3: Add 10g of clinker to 60mL of deionized water, mix well, then stir and react in a water bath at 60°C for 120min, filter with suction, keep the filtrate, wash the filter residue with deionized water for several times, keep the washing solution, and control The dosage ratio of deionized water and filter residue is 1mL: 1g. After co...

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Abstract

The invention provides a method for preparing a functionalized mesoporous nano-SiO2 material by using quartz sand tailings as a raw material, and application of the functionalized mesoporous nano-SiO2 material. The method comprises the following steps: S1, carrying out ball milling on the quartz sand tailings until the particle size is less than or equal to 74 [mu]m, and carrying out acid dissolution, washing and forced air drying; S2, uniformly mixing obtained pretreated tailing powder and solid NaOH, and then roasting for 15-120 min at the temperature of 250-800 DEG C; S3, adding obtained clinker into deionized water, carrying out water bath stirring reaction at 40-60 DEG C for 60-120 min, carrying out suction filtration and washing, and combining filtrate and washing liquid; S4, adding CTAB and a diethanol amine solution into a Na2SiO3 solution, stirring in a water bath at 30-40 DEG C for 30-60 min, and standing for 12 h; and S5, adding obtained nano-SiO2 into absolute ethyl alcohol, carrying out ultrasonic dispersion, dropwise adding KH-792, carrying out a stirring reaction at 40-60 DEG C for 15-30 min, adding a sulfydryl modifier, carrying out a stirring reaction for 30-60 min, filtering, washing, and drying to obtain the product. The functionalized mesoporous nano-SiO2 material has the excellent properties of good orderliness, large specific surface area, small particle size, strong adsorption capacity, strong loading capacity, good dispersity, high reaction activity, low synthesis cost and the like.

Description

technical field [0001] The invention belongs to the field of resource utilization of quartz sand tailings, in particular to a method for preparing functionalized mesoporous nano-SiO by using quartz sand tailings as raw materials 2 Methods of materials and their applications. Background technique [0002] Quartz sand is one of the most widely distributed minerals on the earth's surface. The main component of quartz sand is SiO 2 , also contains a small amount of Al 2 o 3 , Fe 2 o 3 , MgO, K 2 O, CaO and other impurities. At present, quartz sand tailings can be used to make building materials such as cement, glazed tiles, paints, etc., but the resource utilization of quartz sand tailings only accounts for one-tenth of the discharge, and the remaining unused tailings are discharged. The rainwater is discharged into the nearby waters, causing soil erosion, causing river blockage, causing serious damage to the vegetation in the mining area, occupying a large amount of cult...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/18C01B33/32A61K31/496A61K47/69A61P31/04B82Y5/00B82Y30/00B82Y40/00
CPCC01B33/186C01B33/32A61K47/6949A61K31/496A61P31/04B82Y5/00B82Y30/00B82Y40/00C01P2006/12C01P2004/64C01P2004/62C01P2006/16
Inventor 高慧阳张杰焦宇鸿
Owner BENGBU COLLEGE
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