Method for extracting and separating beryllium

An extraction and ion technology, applied in the field of extraction and separation of beryllium, can solve the problems of inability to remove aluminum, many extraction stages, and poor aluminum removal effect, and achieve high beryllium recovery rate, good separation effect, and few extraction stages

Active Publication Date: 2013-01-02
GUANGDONG INST OF RARE METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the ammonium aluminum sulfate crystallization method is poor in removing aluminum, the operation is troublesome; the hydrolysis precipitation method can only

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The beryllium-containing feed liquid of a low-grade compound ore has a main component content of Be 5g / L, Fe 9g / L, and Al 3g / L. Mix the organic phase with a volume ratio of 15% naphthenic acid-15% octanol-70% kerosene with the beryllium-containing feed solution at O:A=3:1, and add dropwise a concentration of 0.6mol / L ammonia water to the pH during stirring =5.2, stop stirring, leave to stand for stratification, analyze and record that Be is 0.05g / L in the aqueous phase, and the beryllium extraction rate reaches 99% through calculation; drain the aqueous phase, then press the organic phase and sulfuric acid solution O: A=0.15: 1. Re-extract the organic phase with a sulfuric acid solution with a concentration of 0.6 mol / L. After mixing evenly, stop stirring, let it stand for stratification, and discharge the water phase; finally, the organic phase and sodium hydroxide solution O:A=0.13:1 , use a sodium hydroxide solution with a concentration of 2.8mol / L to back-extract th...

Embodiment 2

[0014] With embodiment 1, organic phase volume ratio is 25% naphthenic acid-25% isooctyl alcohol-50% kerosene, organic phase is mixed with beryllium-containing material liquid O: A=5: 1, and dropwise concentration in stirring process is 6mol / L sodium hydroxide solution to pH = 7.5, stop stirring, let stand to separate layers, analyze and measure the Be in the water phase to be 0.02g / L, and calculate the beryllium extraction rate to be higher than 99%. Drain the water phase, then according to the organic phase and hydrochloric acid solution O: A=5: 1, add the hydrochloric acid solution with a concentration of 5mol / L into the organic phase, after mixing evenly, stop stirring, leave to stand for stratification, and discharge the water phase; finally press The organic phase and the sodium hydroxide solution are O:A=5:1, and the organic phase is back-extracted with a sodium hydroxide solution with a concentration of 6mol / L. After mixing evenly, stop stirring, leave to stand for stra...

Embodiment 3

[0016] The beryllium-containing feed liquid of a low-grade composite ore has a composition content of Be 2g / L, Fe 5g / L, and Al 6g / L. The volume ratio is that the organic phase of 25% naphthenic acid-15% octanol-60% kerosene is mixed with the beryllium-containing material liquid by O: A=0.6: 1, and the concentration is added dropwise in the stirring process to be 3mol / L sodium carbonate solution to pH=6.0, stop stirring, stand and separate layers, analyze and measure Be in the aqueous phase to be 0.01g / L, beryllium extraction rate reaches 99.5% through calculation, drain the aqueous phase; then press the organic phase and sulfuric acid solution according to O: A= 2:1, back-extract the organic phase with a sulfuric acid solution with a concentration of 3mol / L, after mixing evenly, stop stirring, let stand to separate, and discharge the water phase; finally, according to the organic phase and ammonium carbonate aqueous solution O:A=2:1, Back-extract the organic phase with an aque...

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Abstract

The invention relates to a method for extracting and separating beryllium. Beryllium-containing dosage liquor is a sulfuric acid solution containing beryllium ions, wherein the concentration of the beryllium ions is 0.2-30g/L. The method is characterized in that the method comprises the steps of: (1) a naphthenic acid-alcohol or isooctanol-kerosene organic phase is uniformly mixed with the beryllium-containing dosage liquor; an alkaline solution is added to the mixed liquid, such that the pH value of the liquid is 5-8; (2) an acidic solution is added to the organic phase obtained in the step (1) for stripping impurities, such that an organic phase which is an impurity-removed beryllium-containing organic-phase solution is obtained; and (3) an alkaline solution is added to the organic phase obtained in the step (2) for stripping beryllium, such that a water phase which is an impurity-removed beryllium-containing solution is obtained; and the organic phase is delivered back to the step (1) and is reused. With the method provided by the invention, beryllium can be selectively separated from impurities such as iron and aluminum. The extraction stages are few, the process is simple, a separation effect is good, and a beryllium recovery rate is high.

Description

technical field [0001] The invention relates to a method for extracting and separating beryllium. Background technique [0002] Beryllium is the alkaline earth metal element with the smallest density and is widely used in atomic energy, aerospace and aviation, metallurgy and other fields. [0003] At present, the main production methods for extracting beryllium oxide from ore in the world are fluorination and sulfuric acid. The fluorination method is to mix the finely ground beryllium ore with sodium fluorosilicate, iron ice crystals and sodium carbonate according to the mass ratio and then sinter them in a resistance heating kiln. The process of the fluorination method is relatively simple, the anti-corrosion conditions are good, and it is also suitable for processing raw materials with high fluorine content, but the product quality is slightly inferior to that of the sulfuric acid method. When this method is used to treat low-grade ore, in addition to the increase in the...

Claims

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Application Information

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IPC IPC(8): C22B3/40C22B26/20
CPCY02P10/20
Inventor 刘志强邱显扬朱薇郭秋松
Owner GUANGDONG INST OF RARE METALS
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