Method for preparing ammonium perrhenate from waste liquid containing molybdenum and rhenium

A technology of ammonium perrhenate and waste liquid, which is applied in the field of separation chemistry, can solve the problems of environmental pollution and high cost of eluent, and achieve the effects of environmental protection, social and environmental benefits, and resource conservation

Active Publication Date: 2011-09-07
爱瑞克(大连)安全技术集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main problem is that the cost of eluent used

Method used

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  • Method for preparing ammonium perrhenate from waste liquid containing molybdenum and rhenium

Examples

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Embodiment 1

[0017] Embodiment 1 The method for preparing ammonium perrhenate from waste liquid containing molybdenum rhenium

[0018] Raw materials: Molybdenum roasting flue gas absorption liquid provided by a company A: detected by inductively coupled plasma mass spectrometry, the molybdenum roasting flue gas absorption liquid contains 10g / L of molybdenum, 0.8g / L of rhenium, and 12g / L of iron .

[0019] Method: Take molybdenum roasting flue gas absorption liquid, add 6% hydrogen peroxide until the solution turns yellow (add 50 ml of hydrogen peroxide per liter of absorption liquid), add compounding agent (a mixture of calcium hydroxide and calcium oxide in a weight ratio of 5:1) When the pH is 6-7, separate by pressure filtration, and adsorb the filtrate on an ion-exchange resin column (the ion-exchange resin column is a tertiary aminostyrene anion-exchange column), and stop the adsorption when the concentration of rhenium in the effluent remains unchanged. Resin after full load, use NH...

Embodiment 2

[0023] Embodiment 2 The method for preparing ammonium perrhenate from waste liquid containing molybdenum rhenium

[0024] Raw materials: Molybdenum roasting flue gas absorption liquid provided by a company B: detected by inductively coupled plasma mass spectrometry, the molybdenum roasting flue gas absorption liquid contained 15 g / L of molybdenum, 0.4 g / L of rhenium, and 15 g / L of iron. L.

[0025] Method: Take molybdenum roasting flue gas absorption liquid, add 6% hydrogen peroxide until the solution turns yellow (add 78 ml of hydrogen peroxide per liter of absorption liquid), add compounding agent (a mixture of calcium hydroxide and calcium oxide in a weight ratio of 5:1) When the pH is 6-7, press filtration to separate, and adsorb the filtrate on an ion exchange resin column (the ion exchange resin column is a tertiary aminostyrene anion exchange column), and stop the adsorption when the concentration of rhenium in the effluent remains unchanged. Resin after full load, use...

Embodiment 3

[0029] Embodiment 3 The method for preparing ammonium perrhenate from waste liquid containing molybdenum rhenium

[0030] Raw materials: Molybdenum roasting flue gas absorption liquid provided by a company C: It is detected by inductively coupled plasma mass spectrometry, and the molybdenum roasting flue gas absorption liquid contains 0.5g / L of molybdenum, 1.0g / L of rhenium, and 3g / L of iron. L.

[0031]Method: Take molybdenum roasting flue gas absorption liquid, add 6% hydrogen peroxide until the solution turns yellow (add 5 ml hydrogen peroxide per liter of absorption liquid), add compounding agent (a mixture of calcium hydroxide and calcium oxide in a weight ratio of 5:1) When the pH is 6-7, separate by pressure filtration, and adsorb the filtrate on an ion-exchange resin column (the ion-exchange resin column is a tertiary aminostyrene anion-exchange column), and stop the adsorption when the concentration of rhenium in the effluent remains unchanged. Resin after full load,...

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Abstract

The invention relates to a method for preparing ammonium perrhenate from waste liquid containing molybdenum and rhenium. In the technical scheme of the invention, the method comprises the following steps of: adding hydrogen peroxide into the waste liquid containing molybdenum and rhenium until the solution turns to yellow, then adding a mixed agent until the pH of the solution is 6 to 7, separating by filter pressing, collecting the filtrate, absorbing the filtrate by a resin exchange column, stopping adsorption until the concentration of rhenium in effluent is constant, eluting with NH3.H2O,collecting the eluate, heating to concentrate the eluate at 98-100 DEG C, cooling, and crystallizing to obtain ammonium perrhenate. The mixed agent is a mixture of calcium hydroxide and calcium oxidein a weight ratio of 5:1. According to the invention, the waste liquid containing molybdenum and rhenium, particularly the absorption liquid of the flue gas during molybdenum roasting, is used as theraw material; the enrichment of rhenium is increased by about 20 times; ammonia water is determined as the eluent of rhenium; the elution rate of rhenium is higher than 98%; the recovery rate of rhenium is higher than 93%, the purity of the ammonium perrhenate product is higher than 99.5%, and the economic, social and environmental benefits are significantly improved.

Description

technical field [0001] The invention belongs to the field of separation chemistry, and in particular relates to a method for extracting rhenium from molybdenum roasting flue gas absorption liquid to prepare ammonium perrhenate. Background technique [0002] Rhenium itself has no independent deposits, and is often dispersed in other non-ferrous metal ore bodies, mainly associated with molybdenite, and mostly associated with molybdenum, copper, lead, zinc, platinum, niobium and other minerals in trace amounts, and often exists in the form of rhenium sulfide . In China, molybdenum production enterprises, when molybdenite is roasted, ReS 2 oxidized and with Re 2 o 7 The form is enriched in soot, and the volatilization rate of rhenium is as high as 60-70%. 2 o 7 The flue gas is washed by the washing tower, and the Re in the flue gas 2 o 7 Soluble in water, soluble in Re 2 o 7 The flue gas can be enriched to a certain concentration by circulating the flue gas with the aqu...

Claims

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Application Information

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IPC IPC(8): C01G47/00
Inventor 熊英房大维单炜军李鸿图
Owner 爱瑞克(大连)安全技术集团有限公司
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