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Preparation method of micron superfine spherical sodium chloride

A sodium chloride, micron-scale technology, applied in the field of preparation of micron-scale ultrafine spherical sodium chloride for pore-making, can solve the problems of high equipment requirements, easy aggregation of ultrafine sodium chloride, high pH requirements, etc., to achieve sphericity Good results

Active Publication Date: 2017-02-22
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ultrafine sodium chloride prepared by mechanical ball milling is easy to agglomerate, which requires high equipment, and the shape of the obtained sodium chloride particles is irregular
The salting out crystallization method can obtain ultra-fine sodium chloride with a narrow particle size distribution, but it has high requirements on pH and the particle size cannot be completely controlled
The anti-dissolution method can prepare ultra-fine sodium chloride of 10-20 μm, but due to its uncontrollable shape, it cannot meet the strict requirements for shape when used as a pore-forming agent

Method used

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  • Preparation method of micron superfine spherical sodium chloride
  • Preparation method of micron superfine spherical sodium chloride
  • Preparation method of micron superfine spherical sodium chloride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] At room temperature, add 5.4g glycine to 100ml saturated sodium chloride solution, stir for half an hour, atomizer speed is 15000r / min, air inlet / outlet temperature is 150 / 80°C, collect sodium chloride crystals, and Dry in a vacuum oven at 80°C.

[0034] After spraying gold, scan the microscopic morphology of the prepared grains with a scanning electron microscope (SEM) and calculate the particle size, and the particle size distribution of sodium chloride is 15.31-44.45 μm (i.e. D 97 = 44.45 μm, D 10 =15.31 μm), and the primary crystallization yield was 61.2%. The sphericity is about 95%; the scan results are attached figure 1 .

Embodiment 2

[0036] At room temperature, add 5.4g glycine to 100ml saturated sodium chloride solution, stir for half an hour, atomizer speed is 20000r / min, air inlet / outlet temperature is 150 / 80°C, collect sodium chloride crystals, and Dry in a vacuum oven at 80°C.

[0037] After spraying gold, scan the prepared crystal grain micro-morphology and calculate the particle size with a scanning electron microscope (SEM), and obtain a particle size distribution of sodium chloride of 13.42-43.66 μm (i.e. D 97 = 43.66 μm, D 10 =13.42 μm), and the primary crystallization yield was 57.3%. The sphericity is about 95%; the scan results are attached figure 2 .

Embodiment 3

[0039] At room temperature, add 5.4g glycine to 100ml saturated sodium chloride solution, stir for half an hour, atomizer speed is 25000r / min, air inlet / outlet temperature is 150 / 80°C, collect sodium chloride crystals, and Dry in a vacuum oven at 80°C.

[0040] After spraying gold, scan the prepared crystal grain micro-morphology and calculate the particle size with a scanning electron microscope (SEM), and obtain a particle size distribution of sodium chloride of 10.18-41.19 μm (i.e. D 97 = 41.19 μm, D 10 =10.18 μm), the primary crystallization yield was 66.5%. The sphericity is greater than or equal to 99%; the scanning results are attached image 3 .

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Abstract

The invention relates to a preparation method of micron superfine spherical sodium chloride, in particular to a method for preparing micron superfine spherical sodium chloride for pore drilling with glycine used as a control agent with a spray centrifugal drying method through atomization drying equipment. The preparation method comprises steps as follows: glycine is added to a saturated sodium chloride aqueous solution and evenly stirred, and micron superfine spherical sodium chloride is prepared with the spray centrifugal drying method; the adding mass of glycine is 2%-5% of the total mass of the saturated sodium chloride aqueous solution. The preparation process is simple, the particle size is smaller, the yield of superfine sodium chloride is higher, and the method is applicable to batch preparation of the micron superfine spherical sodium chloride powder for pore forming, the operation is simple and flexible, and mass industrial application is facilitated. The prepared micron superfine spherical sodium chloride is applicable for pore forming.

Description

technical field [0001] The invention relates to a preparation method of micron-scale ultrafine sodium chloride, in particular to a method for preparing micron-scale ultrafine spherical sodium chloride for pore-making by using glycine as a control agent and adopting a spray centrifugal drying method based on atomization drying equipment. Background technique [0002] Sodium chloride is rich in reserves, cheap and easy to get. It can be widely used in inorganic and organic industries, iron and steel industry, food industry, glass manufacturing, dyestuffs, metallurgical industries and other fields. It can also be used as a raw material for seasoning and refined table salt in daily life. . The development of sodium chloride has been involved in many aspects of human development, but the quality of existing sodium chloride is not developed enough, and the products cannot meet specific needs. [0003] As a high-quality fine sodium chloride, micron-sized ultrafine sodium chloride ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D3/24
CPCC01D3/24C01P2004/03C01P2004/32C01P2004/61
Inventor 马运柱刘超刘文胜史政刘阳龙路平
Owner CENT SOUTH UNIV
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