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A melting purification method for obtaining high-purity nacl grains

A purification method and high-purity technology, which is applied in the field of high-purity NaCl material production, can solve the problems of environmental protection pressure and failure to meet purity requirements, and achieve the effects of low production energy consumption, considerable economic and social benefits, and simple equipment

Active Publication Date: 2018-01-30
吉林光盐三百国际贸易有限公司
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  • Abstract
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Problems solved by technology

However, this method cannot meet the purity requirements of 99.99% in one crystallization process, and also because some refining agents such as NaCO 3 etc. are easy to introduce secondary impurities; in addition, this method will use a large amount of distilled or deionized water as a solvent, so a large amount of waste water will be removed, which will bring pressure to environmental protection

Method used

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  • A melting purification method for obtaining high-purity nacl grains
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Examples

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specific Embodiment approach

[0017] 1). Take 10kg of coarse crystalline salt, put it in 99 porcelain alumina to dry it and move it into a high temperature furnace;

[0018] 2) The furnace temperature rises to 780°C within 30 minutes. After 2 hours of constant temperature, the temperature is naturally cooled to 500°C and kept at constant temperature for 0.5 hours, and then within 20 minutes, the furnace temperature is raised from 500°C to 780°C and held at constant temperature for 0.5 hours;

[0019] 3). After continuing to raise the temperature to 1000°C, immediately stop heating and naturally cool down to 780°C, and then increase the temperature to 1000°C within 20 minutes. This process is repeated 2 times.

[0020] 4). Raise the temperature rapidly from 1000°C to 1450°C, keep the temperature constant for 5 minutes, then naturally cool down to 900°C, and then increase the temperature to 1450°C for 5 minutes. Repeat the process 2 times;

[0021] 5). After the temperature rises rapidly from 1450°C to 1700°C, the ...

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Abstract

The invention discloses a melting purification method for obtaining high-purity NaCl grains. The technical method has no waste water discharge, simple equipment, low production energy consumption and high efficiency. The purity of the obtained NaCl product can reach more than 99.99%, and the product yield Greater than 80%. The method can significantly improve the production efficiency of large-scale industrial preparation of high-purity NaCl materials, and its economic and social benefits are expected to be considerable.

Description

Technical field [0001] The invention belongs to the field of high-purity NaCl material production, and specifically is a melting purification method for obtaining high-purity NaCl crystal grains by using melting recrystallization technology. Background technique [0002] Sodium chloride, the chemical formula NaCl, is a colorless cubic crystal or white crystal. It is an alkali metal halide and is one of the important raw materials indispensable in human production and life. The raw materials of sodium chloride mainly come from sea water, salt lakes and salt mines. Normally, the directly obtained well salt, rock salt or sea salt are crude salt products, and the impurities mainly include KCl and CaCl 2 And MgCl 2 As well as some protein organic compounds, the NaCl content is about 93%. High-purity NaCl products need to be obtained through a recrystallization process to meet the requirements of industrial, medical and food applications. [0003] Recrystallization purification technol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01D3/24C01D3/20
CPCC01D3/20C01D3/24C01P2006/80
Inventor 张继森段维江徐增山
Owner 吉林光盐三百国际贸易有限公司
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