Method for preparing ammonium perrhenate through efficient enrichment of rhenium

An ammonium perrhenate enrichment technology, which is applied in the direction of improving process efficiency, can solve the problems of poor quality ammonium perrhenate, low metal recovery rate, and low production efficiency, and achieves technical indicators that are easy to control and metal recovery rate High, high production efficiency effect

Inactive Publication Date: 2017-12-01
周华元 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantages of the existing technology are as follows: large equipment investment, high energy consumption, low metal recovery rate, and low production efficiency. The quality of ammonium acid will become worse and worse

Method used

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  • Method for preparing ammonium perrhenate through efficient enrichment of rhenium

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Effect test

Embodiment 1

[0022] Embodiment 1, a method for efficiently enriching rhenium to prepare ammonium perrhenate comprises the following steps:

[0023] The first step, leaching of rhenium-copper-arsenic filter cake material

[0024] Take the rhenium-copper-arsenic filter cake and put it into the 4N hydrochloric acid system at a liquid-solid weight ratio of 2.5:1 and add sodium chlorate in batches. The amount of sodium chlorate is 5% of the weight of the rhenium-copper-arsenic filter cake material, stir, and heat up To 90°C, the reaction time is 2.5h, filter the filter residue and leachate, the leachate contains rhenium 400mg / L~500mg / L;

[0025] The second step, precipitation and enrichment of rhenium

[0026] Add ammonium paratungstate to the leaching solution described in the first step, the amount of ammonium paratungstate is 30% of the weight of the rhenium-containing copper-arsenic filter cake material, stir for 5 minutes and filter, the obtained mother liquor contains rhenium 30mg / L~40mg...

Embodiment 2

[0031] Embodiment 2, a method for efficiently enriching rhenium to prepare ammonium perrhenate, comprising the following steps:

[0032] The first step, leaching of rhenium-copper-arsenic filter cake material

[0033] Take the rhenium-copper-arsenic filter cake and put it into the 4N hydrochloric acid system according to the liquid-solid weight ratio of 2.8:1, and add sodium chlorate in batches. The amount of sodium chlorate is 6% of the weight of the rhenium-copper-arsenic filter cake material, stir, and heat up To 90°C, the reaction time is 2.5h, filter the filter residue and leachate, the leachate contains rhenium 400mg / L~500mg / L;

[0034] The second step, precipitation and enrichment of rhenium

[0035] Add ammonium paratungstate to the leaching solution described in the first step. The amount of ammonium paratungstate is 28% of the weight of the rhenium-containing copper-arsenic filter cake material. Stir for 5 minutes and filter. into the slag phase to obtain rhenium-r...

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Abstract

The invention discloses a method for preparing ammonium perrhenate through efficient enrichment of rhenium and belongs to the field of rhenium recycling production technologies. The method comprises the following steps of (1), leaching of a rhenium-containing copper-arsenic filter cake material; (2), sediment and enrichment of the rhenium; (3), reverse dissolution of the rhenium; (4), crystallization of the ammonium perrhenate. The method is high in raw material adaption, small in equipment investment, high in metal recycling rate, high in production efficiency and capable of stably outputting the rough ammonium perrhenate with the industrial level being 99.9% or above.

Description

technical field [0001] The invention belongs to the technical field of rhenium recovery and utilization production, and specifically refers to a method for efficiently enriching rhenium to prepare ammonium perrhenate. Background technique [0002] Rhenium has corrosion resistance, wear resistance and good ductility. It is a very important industrial raw material and has a wide range of uses. It can be used as a catalyst, solid propulsion heat-sensitive element, aircraft engine turbine blade, electron tube structural material and superconductor, etc. It is an important intermediate for the preparation of rhenium. The body is ammonium perrhenate. [0003] The existing process for enriching rhenium is N235 extraction or resin adsorption, and then back-extraction or backwashing with ammonia water to obtain a rhenium-rich liquid of about 15g / L, and then crystallize crude ammonium perrhenate by evaporation, concentration and cooling. The disadvantages of the existing technology a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B7/02C22B61/00
CPCC22B7/007C22B7/02C22B61/00Y02P10/20
Inventor 周华元曹志蓝
Owner 周华元
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