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Ammonium rhenate solution crystallization method

A technology of solution crystallization and ammonium rhenate, applied in chemical instruments and methods, rhenium compounds, inorganic chemistry, etc., can solve the problem of low output of ammonium rhenate products, and achieve the effect of improving crystallization efficiency and output

Active Publication Date: 2013-03-27
JIANGXI COPPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this crystallization method is that the yield of ammonium rhenate product obtained is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Embodiment 1: a) the ammonium rhenate solution that the temperature after evaporation concentration is 30 ℃, concentration is 15g / L is placed in the open container; b) ammoniacal liquor is added in the ammonium rhenate solution, and the ammonium rhenate solution is The pH value is adjusted to 8; c) the ammonium rhenate solution is cooled to room temperature with a blower, and the ammonium rhenate solution is initially crystallized during the cooling process; d) the ammonium rhenate solution is cooled in an environment at a temperature of -10°C, The cooling time is 6 hours; e) taking out the ammonium rhenate solution for solid-liquid separation to obtain a crude product of ammonium rhenate.

Embodiment 2

[0010] Embodiment 2: a) the ammonium rhenate solution that the temperature after evaporation concentration is 50 ℃, concentration is 20g / L is placed in the open container; b) ammoniacal liquor is added in the ammonium rhenate solution, and the ammonium rhenate solution is The pH value is adjusted to 9; c) the ammonium rhenate solution is cooled to room temperature with a blower, and the ammonium rhenate solution is initially crystallized during the cooling process; d) the ammonium rhenate solution is cooled in an environment at a temperature of -8°C, The cooling time is 8 hours; e) taking out the ammonium rhenate solution for solid-liquid separation to obtain a crude product of ammonium rhenate.

Embodiment 3

[0011] Embodiment 3: a) the ammonium rhenate solution that the temperature after evaporation and concentration is 90 ℃, concentration is 30g / L is placed in the open container; b) ammoniacal liquor is added in the ammonium rhenate solution, and the ammonium rhenate solution is The pH value is adjusted to 11; c) the ammonium rhenate solution is cooled to room temperature with a blower, and the ammonium rhenate solution is initially crystallized during the cooling process; d) the ammonium rhenate solution is cooled in an environment with a temperature of 0°C, and the The time is 12 hours; e) taking out the ammonium rhenate solution for solid-liquid separation to obtain a crude product of ammonium rhenate.

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Abstract

The invention provides an ammonium rhenate solution crystallization method. The technical scheme of the invention is characterized in that the method comprises the following steps: 1, placing an ammonium rhenate solution having a temperature of 30-90DEG C and a concentration of not less than 15g / L in an open container, wherein the ammonium rhenate solution is obtained after evaporating concentration; 2, adding a substance which can hydrolyze to generate NH4<+> into the ammonium rhenate solution in order to adjust the pH value of the ammonium rhenate solution to 8-11, wherein the substance is ammonia water; 3, blowing the ammonium rhenate solution by a wind source commonly used in the industry in order to cool the ammonium rhenate solution to room temperature, and preliminarily crystallizing the ammonium rhenate solution in the cooling process; 4, cooling the ammonium rhenate solution in an environment having a temperature of -10-0DEG C for above 6h; and 5, taking the ammonium rhenate solution out of the environment, and carrying out solid-liquid separation to obtain crude ammonium rhenate. The ammonium rhenate solution crystallization method has the advantages of crystallization efficiency improvement and ammonium rhenate product output improvement.

Description

technical field [0001] The invention relates to a process for producing ammonium rhenate by wet method, in particular to a method for crystallizing ammonium rhenate solution, which belongs to the technical field of hydrometallurgy. Background technique [0002] In the process of wet production of ammonium rhenate, the traditional crystallization method of ammonium rhenate solution is to cool and crystallize the ammonium rhenate solution after evaporation and concentration to a certain concentration by cooling with cooling water or blowing with a blower, and then carry out Solid-liquid separation to obtain ammonium rhenate product. The disadvantage of this crystallization method is the low yield of ammonium rhenate product obtained. Contents of the invention [0003] The invention provides a method for crystallizing an ammonium rhenate solution to solve the above-mentioned problems. [0004] The technical solution of the present invention is: a method for crystallizing an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G47/00
Inventor 汪饶荣冯洁
Owner JIANGXI COPPER
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