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Method for extracting boric acid from high-magnesium old brine and boron extraction agent

An extraction agent and extraction technology, applied in the field of extraction, can solve the problems of affecting lithium extraction, unsuitable economy, destroying lithium extraction agent, etc., and achieve the effects of avoiding being affected, small solvent consumption, and low flow ratio

Inactive Publication Date: 2019-01-04
INST OF PHARMACY SHANDONG PROV ACAD OF MEDICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the loss of the 1,3-dibasic fatty alcohol 2-ethyl-1,3-hexanediol used in this application is still serious in aqueous solution, and the solubility at normal temperature reaches 4.18g / L, and the dissolved alcohols enter the lower One-stage extraction of lithium will affect the extraction of lithium and destroy the lithium extractant, which is not economically applicable, thus limiting its industrial application

Method used

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  • Method for extracting boric acid from high-magnesium old brine and boron extraction agent
  • Method for extracting boric acid from high-magnesium old brine and boron extraction agent
  • Method for extracting boric acid from high-magnesium old brine and boron extraction agent

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Experimental program
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Effect test

Embodiment 1

[0035]Sulfonated kerosene is used as diluent, and 60% n-octanol + 40% 2-hexyldecanol (shown in the following formula 1-1) is used as extractant. The extraction system composed of extractant and diluent is used as the extraction organic phase, and the concentration of the extraction agent in the extraction organic phase is 50%, that is, the corresponding volume percentage of the extraction agent in the extraction organic phase is 50%.

[0036]

[0037] Step A, control the extraction ratio to 1, carry out five-stage countercurrent extraction at room temperature at 30°C, and obtain the loaded organic phase and raffinate. After measurement and calculation, the concentration of boric acid in the extract is 0.06885g / L, and the extraction rate is 99.79% %.

[0038] Step B, using 0.05M hydrochloric acid as the stripping agent, controlling the stripping ratio to 1, performing five-stage countercurrent stripping on the loaded organic phase to obtain boric acid solution and an empty o...

Embodiment 2

[0040] Using sulfonated kerosene as diluent, 30% n-octanol + 30% 2-isooctanol + 40% 2-hexyldecanol (as shown in the following formula 1-2) as extractant, composed of extractant and diluent The extraction system is used as the extraction organic phase, and the concentration of the extractant in the extraction organic phase is 50, that is, the volume percentage of the extraction agent in the corresponding extraction organic phase is 50%.

[0041]

[0042] Step A, control the extraction ratio to 1, carry out five-stage countercurrent extraction at room temperature at 30°C, and obtain the loaded organic phase and raffinate. After measurement and calculation, the concentration of boric acid in the extract is 0.08346g / L, and the extraction rate is 99.75 %.

[0043] Step B, using 0.05M hydrochloric acid as the stripping agent, controlling the stripping ratio to 1, performing five-stage countercurrent stripping on the loaded organic phase to obtain boric acid solution and an empty ...

Embodiment 3

[0045] With sulfonated kerosene as the diluent, 60% isooctyl alcohol + 20% 2-hexyldecanol + 20% 2-pentyl nonanol (as shown in the following formula 1-3) as the extraction agent, the extraction agent and the diluent The composed extraction system is used as the extraction organic phase, and the concentration of the extractant in the extraction organic phase is 50%, that is, the corresponding volume percentage of the extraction agent in the extraction organic phase is 50%.

[0046]

[0047] Step A, control the extraction ratio to 1, carry out five-stage countercurrent extraction at room temperature at 30°C, and obtain the loaded organic phase and raffinate. After measurement and calculation, the concentration of boric acid in the extract is 0.09217g / L, and the extraction rate is 98.98 %.

[0048] Step B, using 0.05M hydrochloric acid as the stripping agent, controlling the stripping ratio to 1, performing five-stage countercurrent stripping on the loaded organic phase to obta...

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Abstract

The invention discloses a method for extracting boric acid from high-magnesium old brine and a boron extraction agent, and belongs to the technical field of extraction. According to the method, mixedalcohol comprising at least one small-molecule unitary fatty alcohol and at least one large-molecule unitary fatty alcohol serves as the boron extraction agent for extracting the boric acid from the high-magnesium old brine. Compared with the prior art, the extraction method has the advantages of low cost, simplicity in operation, high extraction efficiency and the like and has important application values.

Description

technical field [0001] The invention relates to the technical field of extraction, in particular to a method for extracting boric acid from high-magnesium old brine. Background technique [0002] Boron and boron compounds are important chemical raw materials, widely used in national defense, chemical industry, electronics, medicine, metallurgy, machinery and other industrial sectors. With the development of glass, ceramics, enamel, glass fiber composite thermal insulation materials in the building materials industry and the development of boron-containing industrial materials such as boron-iron alloys, the demand for boric acid is increasing year by year. At present, domestic boric acid (especially refined boron) can no longer meet the demand. Most rely on imports to fill the gap in the market. my country began to import boric acid in the 1990s, and the import volume reached 194,900 tons in 2015. my country's boron resource reserves account for the fourth place in the worl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D11/04C01B35/10
CPCB01D11/0492C01B35/109
Inventor 王延风刘媛媛路文娟张平平杨路平矫春鹏薛林
Owner INST OF PHARMACY SHANDONG PROV ACAD OF MEDICAL SCI
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