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Method for removing odor of refined salt through ferric salt

A technology for refining salt and high-iron salt, applied in the field of salt chemical industry, which can solve the problems of resin replacement, troublesome regeneration, high one-time investment, and difficult operation, etc., and achieve low production cost, simple process operation, and good elimination effect

Inactive Publication Date: 2013-09-11
HENAN UNIV OF URBAN CONSTR +1
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Problems solved by technology

[0003] For the above-mentioned problems, there are currently methods such as flocculation, gas degassing, resin adsorption, and chemical methods to remove odors; at present, mine salt production enterprises often use resin adsorption, but this method has a one-time disadvantage. High investment, difficult operation, troublesome resin replacement and regeneration, and many other defects; companies urgently need a low-investment, easy-to-operate odor removal method

Method used

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  • Method for removing odor of refined salt through ferric salt
  • Method for removing odor of refined salt through ferric salt
  • Method for removing odor of refined salt through ferric salt

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example 1

[0029] 1. The raw brine passes through the sand filter tower I to remove insoluble impurities therein to obtain clarified brine, which is then sent to the dosing and stirring device, and at first, 5% by mass sodium hydroxide solution is added thereto to adjust the pH ≈ 7-8;

[0030] 2. Using the principle of homogeneous catalytic oxidation, adding the oxidant sodium ferrate (Na 2 FeO 4 ), under the catalysis of the catalyst sodium iodate, the small molecule organic acid that causes the brine odor is completely oxidized and decomposed into carbon dioxide, and then 5% by mass of sodium carbonate coprecipitant is added to it, and after a period of stirring, the resulting MgCO 3 , CaCO 3 and Fe(OH) 3 Co-precipitation is formed, and then sent to the inclined tube sedimentation tank for precipitation, and there is obvious stratification in the inclined tube sedimentation tank.

[0031] 3. The slurry in the lower layer is sent to the plate and frame filter press to filter out the...

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Abstract

The invention relates to a method for removing odor of refined salt through ferric salt, and belongs to the technical field of salt chemical engineering. According to the method, the chemical process and the homogeneous catalytic oxidation principle are utilized, sodium ferrate (Na2FeO4) serving as an oxidant and sodium iodate serving as a catalyst are added to brine to treat organic acid in an oxygenolysis manner, and then sodium carbonate serving as a coprecipitator is added, so as to reach the purpose of removing the odor. The method can be used for removing the odor of the refined salt, and is low in cost, innocuous and unpoisonous to human body, environmentally-friendly and beneficial for industrial application.

Description

technical field [0001] The invention belongs to the technical field of salt chemical industry, and in particular relates to a method for removing the peculiar smell of refined salt with high iron salt. Background technique [0002] my country is the first country in the world to develop and utilize deep brine. Deep underground brine resources are abundant, with the characteristics of wide distribution, many halogen-bearing layers (systems), and deep burial. , Reductive synthesis and diagenetic transformation process, so that the salt mine layer contains a part of residual organic matter, and the refined salt produced by the salt mine brine has obvious odor, and the "no odor sensory index" cannot meet the national standard. Edible salt standard. [0003] For the above-mentioned problems, there are currently methods such as flocculation, gas degassing, resin adsorption, and chemical methods to remove odors; at present, mine salt production enterprises often use resin adsorption...

Claims

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Application Information

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IPC IPC(8): C01D3/06
Inventor 池吉安海国栋牛树君池全超赵彦星杨光杰李飞王旭峰吴祖杰崔强靳鹏
Owner HENAN UNIV OF URBAN CONSTR
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