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A kind of method preparing 6n level magnesium sulfate solution

A technology of magnesium sulfate and solution, which is applied in the preparation of 6N grade magnesium sulfate and the preparation of 6N grade magnesium sulfate solution, which can solve the problems of low magnesium yield, high production cost and long process

Active Publication Date: 2022-01-25
NANCHANG HANGKONG UNIVERSITY
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  • Description
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Problems solved by technology

[0003] In view of the fact that there is no method for preparing 6N-grade magnesium sulfate from magnesium-containing brine at present, and the indirect method for preparing 6N-grade magnesium sulfate has the disadvantages of long flow process, low magnesium yield, and high production cost, a method for efficiently separating 4N-grade magnesium sulfate is established. Metal and non-metallic impurities in magnesium sulfate, the method for preparing 6N grade magnesium sulfate solution

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  • A kind of method preparing 6n level magnesium sulfate solution

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Embodiment 1

[0022] The C272 organic phase is a sulfonated kerosene solution of C272, wherein the concentration of C272 is 1.0 mol / L. When in use, use ammonia water to saponify the C272 organic phase to obtain the ammonia saponified C272 organic phase.

[0023] The element concentrations in the 4N grade magnesium sulfate solution are: Cl 0.00010g / L, Si 0.00010g / L, As0.00010g / L, Na 0.00010g / L, K 0.00010g / L, Mg 58.0g / L, Ca 0.0010 g / L, Pb 0.00010g / L, Al 0.00010g / L, Fe 0.00010g / L.

[0024] Step 1: Separation of NaKMg / MgCaPbAlFe by fractional distillation and extraction at full load

[0025] Use the balanced load C272 organic phase obtained at the 46th stage of the NaK / Mg full-load fractionation extraction system in step 2 as the extraction organic phase, 4N grade magnesium sulfate as the feed liquid, and the equilibrium water obtained at the 30th stage of the Mg / CaPbAlFe fractionation extraction system in step 3 The phase is detergent. The balanced load C272 organic phase obtained at the 46...

Embodiment 2

[0032] The C272 organic phase is a sulfonated kerosene solution of C272, wherein the concentration of C272 is 1.0 mol / L. When in use, use ammonia water to saponify the C272 organic phase to obtain the ammonia saponified C272 organic phase.

[0033] The element concentrations in the 4N grade magnesium sulfate solution are: Cl 0.00030g / L, Si 0.00020g / L, As0.00020g / L, Na 0.00040g / L, K 0.00030g / L, Mg 60.0g / L, Ca 0.0030 g / L, Pb 0.00020g / L, Al 0.00020g / L, Fe 0.00020g / L.

[0034] Step 1: Separation of NaKMg / MgCaPbAlFe by fractional distillation and extraction at full load

[0035] Use the balanced load C272 organic phase obtained at the 42nd stage of the NaK / Mg full-load fractionation extraction system in step 2 as the extraction organic phase, 4N grade magnesium sulfate as the feed liquid, and the equilibrium water obtained at the 38th stage of the Mg / CaPbAlFe fractionation extraction system in step 3 The phase is detergent. The balanced load C272 organic phase obtained at the 42...

Embodiment 3

[0042] The C272 organic phase is a sulfonated kerosene solution of C272, wherein the concentration of C272 is 1.0 mol / L. When in use, use ammonia water to saponify the C272 organic phase to obtain the ammonia saponified C272 organic phase.

[0043] The element concentrations in the 4N grade magnesium sulfate solution are: Cl 0.00030g / L, Si 0.00020g / L, As0.00020g / L, Na 0.00040g / L, K 0.00030g / L, Mg 60.0g / L, Ca 0.0030 g / L, Pb 0.00020g / L, Al 0.00020g / L, Fe 0.00020g / L.

[0044] Step 1: Separation of NaKMg / MgCaPbAlFe by fractional distillation and extraction at full load

[0045] Use the balanced load C272 organic phase obtained at the 40th stage of the NaK / Mg full-load fractionation extraction system in step 2 as the extraction organic phase, 4N grade magnesium sulfate as the feed liquid, and the equilibrium water obtained at the 40th stage of the Mg / CaPbAlFe fractionation extraction system in step 3 The phase is detergent. The balanced load C272 organic phase obtained at the 40...

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Abstract

A method for preparing a 6N-grade magnesium sulfate solution of the present invention uses a 4N-grade magnesium sulfate solution as a feed liquid and C272 as an extraction agent to separate NaKMg / MgCaPbAlFe by full-load fractional distillation extraction, full-load fractional distillation extraction and separation of NaK / Mg and fractional distillation extraction to separate Mg / Mg / CaPbAlFe is composed of three steps: separate and remove metal elements such as sodium, potassium, calcium, lead, aluminum and iron in the feed liquid, and separate and remove non-metal elements such as chlorine, silicon and arsenic to prepare 6N grade magnesium sulfate solution. The purity of the target product 6N grade magnesium sulfate solution is 99.99992% to 99.99998%, and the yield of magnesium in the 4N grade magnesium sulfate solution is 95% to 97%. The invention has the advantages of high product purity, high magnesium yield, less reagent consumption, high separation efficiency, short process flow, low production cost and the like.

Description

technical field [0001] The invention relates to a method for preparing a 6N grade magnesium sulfate solution, which specifically relates to using a 4N grade magnesium sulfate solution as a feed liquid and C272 as an extraction agent to separate and remove metal elements such as sodium, potassium, calcium, lead, aluminum and iron in the feed liquid , and the separation and removal of chlorine, silicon, arsenic and other non-metallic elements to prepare 6N grade magnesium sulfate solution. The specific technical field of the present invention is the preparation of 6N grade magnesium sulfate. Background technique [0002] Brine is an important resource for extracting magnesium, mainly containing magnesium, sodium, potassium, calcium, aluminum, iron metal elements, sulfur (sulfate) and chlorine (chloride ion) non-metallic elements, and trace elements such as lead, cadmium, silicon, arsenic, etc. . At present, the highest purity of magnesium sulfate extracted from magnesium-con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F5/40B01D3/40
CPCC01F5/40B01D3/40
Inventor 李艳容钟学明
Owner NANCHANG HANGKONG UNIVERSITY
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