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Method of separating vanadium and chromium quickly by means of centrifugal extraction and preparing ammonium metavanadate

An ammonium metavanadate and extraction technology, which is applied in the field of ammonium metavanadate preparation, can solve the problems of easy degradation of the extractant and many extraction stages, and achieves the effects of providing a recycling rate, reducing an oxidation reaction process and saving costs.

Active Publication Date: 2018-08-03
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problems of many extraction stages in the existing extraction separation and stripping preparation of ammonium metavanadate, and the extraction agent is easy to degrade during the separation process, the present invention provides an efficient and fast centrifugal extraction method for recycling vanadium in waste chromium vanadium residue. Method for separating vanadium chromium and preparing ammonium metavanadate

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  • Method of separating vanadium and chromium quickly by means of centrifugal extraction and preparing ammonium metavanadate

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Embodiment 1

[0063] The present embodiment provides a kind of fast centrifugation extracting and separating vanadium chromium and the method for preparing ammonium metavanadate, described method comprises the following steps:

[0064] (1) adopt primary amine sulfate extractant and vanadium-containing chromium leachate to carry out centrifugal extraction and separation:

[0065] The concentration of vanadium element is 23.7g / L, and initial pH is 5 vanadium-containing chromium leachate and primary ammonium sulphate extraction agent are mixed, and described primary amine sulphate extraction agent is (C 15 h 31 NH) 2 SO 4 , (C 17 h 35 NH) 2 SO 4 and (C 19 h 39 NH) 2 SO 4 The mixture of the primary amine sulfate extractant and the vanadium-chromium-containing leaching solution is 1:1, and the molar ratio of the primary amine sulfate extractant to the vanadium-chromium-containing leaching solution is 1:5. , carry out 4-stage countercurrent centrifugal extraction and separation, contro...

Embodiment 2

[0070] The present embodiment provides a kind of fast centrifugation extracting and separating vanadium chromium and the method for preparing ammonium metavanadate, described method comprises the following steps:

[0071] (1) adopt primary amine sulfate extractant and vanadium-containing chromium leachate to carry out centrifugal extraction and separation:

[0072] The vanadium element concentration is 15g / L, the vanadium-chromium-containing leaching solution that initial pH is 7 is mixed with primary ammonium sulphate extraction agent, and described primary amine sulphate extraction agent is (C 8 h 17 NH) 2 SO 4 , under the condition that the ratio of the two phases of the primary amine sulfate extractant and the vanadium-chromium-containing leach solution is 1:2, and the molar ratio of the primary amine sulfate extractant and the vanadium-containing chromium leach solution is 1:1, Carry out 4-stage countercurrent centrifugal extraction and separation, control the temperat...

Embodiment 3

[0077] The present embodiment provides a kind of fast centrifugation extracting and separating vanadium chromium and the method for preparing ammonium metavanadate, described method comprises the following steps:

[0078] (1) adopt primary amine sulfate extractant and vanadium-containing chromium leachate to carry out centrifugal extraction and separation:

[0079] The vanadium element concentration is 20g / L, and the vanadium-chromium-containing leaching solution that initial pH is 8 is mixed with the primary amine sulfate extraction agent, and the primary amine sulfate extraction agent is (C 12 h 25 NH) 2 SO 4 , under the condition that the ratio of primary amine sulfate extractant and vanadium-chromium-containing leaching solution two-phase ratio is 1:3, and the mol ratio of primary amine sulfate extractant and vanadium-containing chromium leaching solution is 1:9, Carry out 4-stage countercurrent centrifugal extraction and separation, control the temperature of countercu...

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Abstract

The invention provides a method of separating vanadium and chromium quickly by means of centrifugal extraction and preparing ammonium metavanadate. The method comprises the following steps: (1) mixinga vanadium and chromium-containing lixivium and a primary amine sulfate extraction agent for 3-6 stages of countercurrent centrifugal extraction separation to obtain an upper extracted organic phase;and (2) carrying out reverse extraction on the upper extracted organic phase with ammonia water to obtain white powder, and carrying out post-treatment on the obtained white powder to obtain ammoniummetavanadate. Based on the prior art, by means of an advantage of adopting the primary amine sulfate extraction agent combined with a centrifugal extractor, vanadium and chromium in the lixivium areseparated quickly and efficiently (3.6-7.2 min) by means of 3-6 stages of countercurrent centrifugal extraction; a two-step separation and purification coupling process is carried out by combining reverse extraction, so that the extraction rate of vanadium and the separating factors of vanadium and chromium are improved greatly to obtain high purity ammonium metavanadate compound white powder. Themethod provides a basic technical support for improving the cyclic utilization rate of the extractor and reducing the recycling cost of vanadium and chromium waste residues.

Description

technical field [0001] The invention belongs to the field of ammonium metavanadate preparation, and relates to a method for fast centrifugal extraction and separation of vanadium and chromium and preparation of ammonium metavanadate, in particular to a method for efficient and fast recycling of vanadium in vanadium and chromium waste residue by centrifugal extraction and separation of vanadium and chromium and preparation of metavanadate Ammonium vanadate method. Background technique [0002] It is a key step for the recovery and utilization of vanadium resources in vanadium chromium waste residue to study efficient and rapid extraction and separation of vanadium and chromium in the leaching solution and back extraction to prepare high-purity ammonium metavanadate. Centrifugal extraction separation utilizes the difference in density between the two extracted phases to rapidly and efficiently separate the two phases under the action of high-speed centrifugal force. Compared ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/34C22B3/40C22B34/22C22B34/32
CPCC22B34/22C22B34/32C22B3/34C22B3/402Y02P10/20
Inventor 宁朋歌景晓华曹宏斌
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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