Method for extracting potassium sulphate by magnesium sulfate sub-type potassium-containing salt lake brine water

A technology of magnesium sulfate subtype and potassium sulfate, which is applied in the direction of alkali metal sulfite/sulfate purification, etc., can solve the problems of saline lake edible salt pollution, inconvenience of potassium sulfate products, and inability to use potassium resources, so as to improve utilization rate, The effect of low production cost and convenient operation

Inactive Publication Date: 2006-06-21
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Abstract
  • Description
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Problems solved by technology

All contain a certain amount of flotation agent in the product obtained by this method and discharge mother liquor, bring certain inconvenience to the deep processing utilization of potassium sulfate product and the further treatment of mother liquor, secondly this method can not be used for mainly making edible salt with mining sodium chloride The development of potassium resources in the salt lake brine of the product will bring certain product pollution to the exploitation of salt lake edible salt

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  • Method for extracting potassium sulphate by magnesium sulfate sub-type potassium-containing salt lake brine water

Examples

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Effect test

Embodiment 1

[0023] Embodiment 1, utilize the method for extracting potassium sulfate from magnesium sulfate subtype potassium-containing salt lake brine, comprising the following processing steps:

[0024] ①The potassium-magnesium sulfate mixed salt mine and the second potassium magnesium sulfate mixed salt mine are respectively obtained by evaporating the magnesium sulfate subtype potassium-containing salt lake brine through the sun in the salt field, and the content of the main components of the potassium magnesium sulfate mixed salt mine in the first stage is controlled The range is: Na: 5-15%; Mg: 4-10%; K: 5-10%; C1: 15-30%; SO 4 : 10-25%; the content control range of the main components of the second-stage potassium-magnesium sulfate mixed salt mine is: Na: 5-10%; Mg: 4-10%; K: 8-12%; Cl: 20-38% ;SO 4 : 6-15%;

[0025] ②The above-mentioned one-stage and two-stage potassium-magnesium sulfate mixed salt ore, potassium sulfate mother liquor and water are batched according to the rati...

Embodiment 2

[0029] Embodiment 2, utilize the method for extracting potassium sulfate from magnesium sulfate subtype potassium-containing salt lake brine, comprising the following processing steps:

[0030] ①The potassium-magnesium sulfate mixed salt mine and the second potassium magnesium sulfate mixed salt mine are respectively obtained by evaporating the magnesium sulfate subtype potassium-containing salt lake brine through the sun in the salt field, and the content of the main components of the potassium magnesium sulfate mixed salt mine in the first stage is controlled The range is: Na: 5-15%; Mg: 4-10%; K: 5-10%; Cl: 15-30%; SO 4 : 10-25%; the content control range of the main components of the second-stage potassium-magnesium sulfate mixed salt mine is: Na: 5-10%; Mg: 4-10%; K: 8-12%; Cl: 20-38% ;SO 4 : 6-15%;

[0031] ②The above-mentioned first-stage and second-stage potassium-magnesium sulfate mixed salt ore, potassium sulfate mother liquor and water are batched according to the...

Embodiment 3

[0035] Embodiment 3, utilize the method for extracting potassium sulfate from magnesium sulfate subtype potassium-containing salt lake brine, comprising the following processing steps:

[0036]①The potassium-magnesium sulfate mixed salt mine and the second potassium magnesium sulfate mixed salt mine are respectively obtained by evaporating the magnesium sulfate subtype potassium-containing salt lake brine through the sun in the salt field, and the content of the main components of the potassium magnesium sulfate mixed salt mine in the first stage is controlled The range is: Na: 5-15%; Mg: 4-10%; K: 5-10%; C1: 15-30%; SO 4 : 10-25%; the content control range of the main components of the second-stage potassium-magnesium sulfate mixed salt mine is: Na: 5-10%; Mg: 4-10%; K: 8-12%; Cl: 20-38% ;SO 4 : 6-15%;

[0037] ②The above-mentioned first-stage and second-stage potassium-magnesium sulfate mixed salt ore, potassium sulfate mother liquor and water are batched according to the ...

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Abstract

The invention provides a method for preparing kalium sulphuricum by employing potassium and magnesium sulfate mixed ores got from solarizing the sulfuric acid magnesium salt lake containing potassium saline water salt-field as raw material, which comprises: solarizing the saline water containing potassium from sulfuric acid magnesium salt lake, getting one-stage potassium and magnesium sulfate mixed ores and two-stage potassium and magnesium sulfate mixed ores, proportioning the two ores, kalium sulphuricum mother liquid and water according to a certain propotion, proceeding thermal conversion in a certain temperature range, thermal filtering to remove sodium, cooling for crystallization to evole out medium raw material, adding water into the medium raw material, then disintegrating and conversing directly, cooling, separating, washing, and drying under a certain temperature range, and getting the kalium sulphuricum. The inventioin is characterized by the following aspects: adding no extra potassium chloride, low producing cost, high quality of the product which can be directly used as industrial raw material; employing no floating agent, removing the grinding and float choosing process, simple process, convenient operation, high benefit, no pollution to the ecological environment, increasing the utilization coefficient of the salt lake resource and realizing the resource utilization stratege of circulating economy.

Description

technical field [0001] The invention relates to a method for extracting potassium sulfate by utilizing potassium-containing brine of magnesium sulfate subtype salt lake, in particular to a method for utilizing potassium-containing brine of magnesium sulfate subtype salt lake to sun-dry potassium-magnesium sulfate mixed ore in salt fields, heat dissolving and removing sodium, and low-temperature cooling The intermediate raw material of potassium sulfate is analyzed, and the process method for preparing potassium sulfate by directly adding hydrolysis to the intermediate raw material. Background technique [0002] Sulfate-type salt lake brine is a brine resource that mainly contains inorganic salt-forming elements such as sodium, potassium, magnesium, chlorine, and sulfate. It is widely distributed in salt lakes in Xinjiang, Qinghai, and Inner Mongolia in my country. Its potassium resource reserves are about It accounts for 60% of the total reserves of brine potassium resources ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D5/16
Inventor 李海民张全有杨海云程怀德火焱孟瑞英
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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