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Method for synthesizing disodium octaborate tetrahydrate by utilizing liquid boron ore

A technology of disodium octaborate tetrahydrate and boron ore, which is applied in the direction of borate, boron compound, boron oxide compound, etc., can solve the problems of high impurity content, low boron content, high energy consumption, etc., to simplify the preparation process and product The effect of good quality and reduced energy consumption

Active Publication Date: 2017-04-26
JIANGXI HZONE LITHIUM TECH
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  • Description
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Problems solved by technology

The existing extraction method is used to extract boron from liquid boron ore. The boron-rich organic phase obtained by extraction is directly fed into stripping. The stripping agent is deionized water with low acidity or low concentration lye. The final product of the stripping solution is boric acid or borax. Due to the low solubility of boric acid or borax in water at room temperature, the boron content in the stripping solution is low, and the energy consumption in the subsequent evaporation and crystallization process is high, and because the boron-rich organic reverse extraction is not washed before, the content of impurities such as magnesium in the stripping solution is high. To prepare high value-added disodium octaborate tetrahydrate products, further processing is required, with high energy consumption and long process

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  • Method for synthesizing disodium octaborate tetrahydrate by utilizing liquid boron ore

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Effect test

specific Embodiment 1

[0033] Isooctyl alcohol is selected as the alcohol extractant, sulfonated kerosene is used as the diluent to form the extracted organic phase, and the volume ratio of isooctanol in the extracted organic phase is 20% to 50%.

[0034]Add 6mol / l hydrochloric acid solution to 1 part of liquid boron ore, react until the pH value of the solution is ≤2, filter the above solution to obtain boric acid solid and acidified boron extraction solution, and the flow ratio of extraction organic phase agent and acidification boron extraction solution is 1: 1~1.5, carry out 4-stage countercurrent extraction at 25°C, obtain boron-rich organic phase after phase separation, use 1mol / l hydrochloric acid as detergent, flow ratio of boron-rich organic phase to detergent is 1:20~30, at 25°C Perform 3-stage countercurrent washing, and obtain the boron-rich organic phase after washing and removing impurities after phase separation. Using 0.5-1mol / l sodium hydroxide solution as the stripping agent, the fl...

specific Embodiment 2

[0036] The alcohol extractant is a compound system of isooctyl alcohol and 2-ethyl-1, 3-hexanediol, and the diluent is sulfonated kerosene to form the extraction organic phase. The volume ratio of isooctyl alcohol in the extraction organic phase is 10% to 50%. %, 2-ethyl-1,3-hexanediol accounts for 10%-50% by volume in the extracted organic phase, and sulfonated kerosene accounts for 50%-70% by volume in the extracted organic phase.

[0037] Add 3 mol / l sulfuric acid solution to 1 part of liquid boron ore, react until the pH value of the solution is ≤2, filter the above solution to obtain boric acid solid and acidified boron extraction solution, and the flow ratio of the extraction organic phase agent to the acidification boron extraction solution is 1: 1~2, carry out 3-stage countercurrent extraction at 25°C, obtain boron-rich organic phase after phase separation, use 3mol / l hydrochloric acid as detergent, flow ratio of boron-rich organic phase to detergent is 1:20~30, and ext...

specific Embodiment 3

[0039] Isooctyl alcohol is selected as the alcohol extractant, sulfonated kerosene is used as the diluent to form the extracted organic phase, and the volume ratio of isooctanol in the extracted organic phase is 20% to 50%.

[0040] Add 6mol / l hydrochloric acid solution to 1 part of liquid boron ore, react until the pH value of the solution is ≤2, filter the above solution to obtain boric acid solid and acidified boron extraction solution, and the flow ratio of extraction organic phase agent and acidification boron extraction solution is 1: 1~1.5, carry out 4-stage countercurrent extraction at 25°C, obtain boron-rich organic phase after phase separation, use 1mol / l hydrochloric acid as detergent, flow ratio of boron-rich organic phase to detergent is 1:20~30, at 25°C Perform 3-stage countercurrent washing, and obtain the boron-rich organic phase after washing and removing impurities after phase separation. Using 1.5-2mol / l sodium hydroxide solution as the stripping agent, the f...

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Abstract

The invention belongs to the technical field chemical, and relates to a method for synthesizing disodium octaborate tetrahydrate by utilizing liquid boron ore. The method comprises the following steps: performing acidizing and boron extracting on the liquid boron ore to obtain acidized boron extracting liquid, extracting boracic acid from the acidized boron extracting liquid by adopting an alcohol extraction agent at a normal temperature, performing an esterification reaction on an extracting agent and the boracic acid to obtain a boron-rich organic phase, washing the boron-rich organic phase by adopting an acidic solution with the acidity of 0 to 12 M to remove the impurities, such as calcium, magnesium and iron, mixing the impurities-removed boron-rich organic phase and sodium hydroxide solution, performing back extraction with stirring to obtain a back extraction solution, controlling the concentration and the flow ratio of the sodium hydroxide solution so that a hydrolysis reaction process of boron-rich organic phase borate is coupled with a synthesis reaction process of the disodium octaborate tetrahydrate to directly obtain disodium octaborate tetrahydrate solution, and drying and pulverizing to obtain the disodium octaborate tetrahydrate with low impurity content. According to the method, a preparation process of the disodium octaborate tetrahydrate is simplified; the method has the characteristics that the raw materials are low in cost and are easily obtained, the product quality is high, the energy consumption is reduced, and the method is suitable for industrial application.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a method for synthesizing disodium octaborate tetrahydrate by utilizing liquid boron ore. Background technique [0002] Disodium octaborate tetrahydrate is one of the important fine borides, with high boron content, the theoretical content of boron element is 20.967%, and the actual content is 20%-21.5%. It is very soluble in water, 4.2g / 100ml water at 0°C, 41g / 100ml water at 50°C, and 74g / 100ml water at 100°C. Disodium octaborate tetrahydrate is widely used in agriculture and industry. In agriculture, since boron is one of the elements necessary for plant growth, it plays a very important role in plant growth and development. The method of spraying fertilizer is often used in agriculture. To supplement boron, disodium octaborate tetrahydrate is widely used in agricultural production due to its high boron content, good water solubility, and nearly neutral aqueous solut...

Claims

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Application Information

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IPC IPC(8): C01B35/12
CPCC01B35/121C01P2006/80
Inventor 郭永兴欧阳红勇王迎春曾小毛刘金练樊磊祝宏帅
Owner JIANGXI HZONE LITHIUM TECH
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