Melting and purifying method for acquiring high purity NaCl crystal grains

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

Active Publication Date: 2017-05-10
吉林光盐三百国际贸易有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Melting and purifying method for acquiring high purity NaCl crystal grains
  • Melting and purifying method for acquiring high purity NaCl crystal grains

Examples

Experimental program
Comparison scheme
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specific Embodiment approach

[0017] 1) Take 10kg of coarse-grained salt, put it into 99 porcelain alumina and move it into a high-temperature furnace;

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

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

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

[0021] 5) Rapidly increase the temperature from 1450°C to 1700°C, immediately cool down to 900°C naturally, and then rapidly in...

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Abstract

The invention discloses a melting and purifying method for acquiring high purity NaCl crystal grains. A technical method does not have waste water discharge, the equipment is simple, production has low energy consumption and high efficiency, purity of the obtained NaCl product reaches 99.99% or above, and the product yield is higher than 80%. The method can be used for substantially improving production efficiency of large scale industrial preparation of the high purity NaCl material, and the economic benefits and social benefits are predicted to be considerable.

Description

technical field [0001] The invention belongs to the field of high-purity NaCl material production, and specifically relates to a melting purification method for obtaining high-purity NaCl crystal grains by means of melting recrystallization technology. Background technique [0002] Sodium chloride (Sodium chloride), chemical formula NaCl, colorless cubic crystal or white crystal, belongs to alkali metal halides, and is one of the indispensable and important raw materials in human production and life. Sodium chloride raw materials mainly come from seawater, salt lakes and salt mines. Usually, the directly obtained well salt, rock salt or sea salt is a crude salt product, and the impurities mainly include KCl, CaCl 2 and MgCl 2 And some protein organic compounds, etc., 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 fields. [0003] Recrystallization pu...

Claims

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Application Information

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Patent Type & Authority Applications(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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