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A process for the production of potassium sulphate and magnesium sulphate from carnallite and sodium sulphate

A carnallite, sodium sulfate technology, used in alkali metal sulfite/sulfite, alkali metal sulfite/sulfate purification, chemical instruments and methods, etc.

Inactive Publication Date: 2019-09-03
DEAD SEA WORKS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, slow-release and controlled-release fertilizers differ in many ways: the technology they use, release mechanism, longevity, release control factors, etc.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment approach

[0048] According to some demonstrative embodiments, the method may include selecting a specific ratio of water\carnallite to result in decomposition of carnallite and saturation of MgCl with KCl 2 brine. According to some embodiments, the method may further comprise contacting sulfate anions from the sulfate mineral with brine to produce langbeinite, langbeinite, and Shenite.

[0049] According to some embodiments, the method may further comprise a reaction between carnallite and sodium sulfate to produce a mixture of langbeinite\kubeinite KCl and NaCl.

[0050] According to some embodiments, the method may include further separating NaCl from the solids of the mixture by, for example, flotation.

[0051] According to some embodiments, the method may include adding water to decompose langbeinite into SOP.

[0052] According to some embodiments, decomposition of langbeinite to SOP can also be performed by adding water alone, which will produce SOP and magnesium sulfate brine....

Embodiment -1

[0056] 2000 grams of carnallite containing 5% NaCl and 5% attached moisture were mixed with 1200 grams of water at 35°C. The suspension was stirred for 1 hour. 142 g of Na2SO4 were added and stirring was continued for 120 minutes at 35°C. The resulting suspension was separated and the solid 490 g and brine were sent for analysis.

[0057] Solid content (in wt%):

[0058] NaCl-20.5

[0059] KCl-58.7

[0060] Potashite-20.8

[0061] Brine composition (in mol / 1000mol H 2 O meter):

[0062] Na 2 Cl 2 -10.2

[0063] K 2 Cl 2 -9.8

[0064] MgSO 4 7.7

[0065] MgCl 2 -50.2.

Embodiment -2

[0067] 2000 grams of carnallite containing 5% NaCl and 5% attached moisture were mixed with 1200 grams of water at 35°C. The suspension was stirred for 1 hour. Add 284 g Na 2 SO 4 , and continued stirring at 35 °C for 120 min. The resulting suspension was separated and the solid 608 g and brine were sent for analysis.

[0068] Solid content (in wt%):

[0069] NaCl-33.6

[0070] KCl-43.3

[0071] Kobeinite-23.1

[0072] Brine composition (in mol / 1000mol H 2 O meter):

[0073] Na 2 Cl 2 -10.9

[0074] K 2 Cl 2 -10.8,

[0075] MgSO 4 -13.1

[0076] MgCl 2 -46.5.

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PUM

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Abstract

According to some embodiments there is provided a process for the recovery of SOP from Sulphate bearing mineral and Carnallite or Sylvenite, comprising: Dissolving Carnallite in water to obtain Sylvenite and high Magnesium Chloride brine; Adding Sodium Sulphate to said Carnallite to produce mixture of Kainte\Leonite, KCl and NaCl precipitant and brine containing Mg Cl2, KCl, NaCl; Separating the NaCl from the mixture; Obtaining a precipitant mixture of Leonite with KCl; Filtering said Leonite and washing with water to yield pure mixture of Leonite with KCl; Adding KCl to the Leonite with the KCl; and Decompose said Leonite with the KCl to SOP.

Description

[0001] field of invention [0002] The present invention relates to the field of fertilizers derived from any substance, natural or synthetic, which is applied to soil or plant tissue to provide one or more plant nutrients necessary for plant growth, in particular to produce potassium sulfate, which is a fertilizer A key component of the industry. [0003] Background of the invention [0004] To grow properly, plants need nutrients (nitrogen, potassium, calcium, zinc, magnesium, iron, manganese, etc.), which can usually be found in the soil. Fertilizers are sometimes required to achieve the desired plant growth as these fertilizers promote plant growth. [0005] This growth of plants is achieved in two ways, traditionally with additives that provide nutrients. The second way some fertilizers work is by improving the soil's availability by altering its water retention and aeration. Fertilizers typically provide three main macronutrients in varying proportions: [0006] Nitro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05D1/00C05D1/04
CPCC05D1/00C05D1/02C05D1/04C05D5/00C01D5/00C01D5/12C01D5/16
Inventor J·拉蒂K·阿布阮比什O·科恩E·维森伯格N·盖因克
Owner DEAD SEA WORKS
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