Method for removing tungsten, vanadium, phosphor and arsenic from molybdate solution by deposition

A molybdate and solution technology, applied in chemical instruments and methods, molybdenum compounds, inorganic chemistry, etc., can solve the problems of limited tungsten removal depth, complicated operation, and small unit production capacity, and achieve environmental pollution and impurity removal depth High, easy-to-implement effect

Active Publication Date: 2009-07-29
CENT SOUTH UNIV
View PDF2 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current molybdenum mineral raw materials are becoming more and more complicated, especially when dealing with high-tungsten molybdenite, nickel-molybdenum ore, spent catalysts and other raw materials, removing tungsten, vanadium, phosphorus, and arsenic from molybdate solution has become a major step in molybdenum metallurgy. An important task and problem of
[0003] In order to remove phosphorus and arsenic impurities in molybdate, the classic ammonium-magnesium salt precipitation method is widely used in industry at present. Its disadvantages are complicated operation, difficult filtration of precipitated slag, and large loss of molybdenum; a company uses ion exchange process in tungsten metallurgy for reference , that is, the use of strongly basic anion exchange resins for MoO 4 2- The adsorption capacity is greater than that of PO 4 3- , AsO 4 3- The characteristics of the sodium molybdate ion exchange process to remove impurities phosphorus and arsenic
However, due to the small unit production capacity of the resin, the OH in the sodium molybdate solution - , Cl - The strict requirements on the content of such anions make the process poorly adaptable to raw materials; in order to remove vanadium in the molybdate solution, Chinese patents CN1792819A and CN101062785A respectively use chelating ion exchange resins and strong basic anion exchange resins. The metavanadate in the molybdate solution is preferentially adsorbed

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0018] Example 1. 1L of sodium molybdate solution, containing Mo 100g / L, WO 3 1.0g / L, pH=9.6. Under the condition of room temperature and stirring speed of 150rpm, MnO is generated in situ 2 Is 50 times the theoretical amount (assuming MnO 2 With WO 3 The molar ratio is equal to 1 as the theoretical amount.) Add the required reagent, that is, add 13.6g of potassium permanganate, and after it is dissolved, slowly add 29.24g of manganese sulfate (prepared to 200-300g / L of manganese sulfate solution), Finally, 6.88g of NaOH was slowly added. Continue to stir for 1 hour and then filter, the filtrate contains WO 3 0.05g / L, Mo 97.5g / L.

Example Embodiment

[0019] Example 2. 1L of sodium molybdate solution, containing Mo80g / L, WO 3 1.0g / L, V 2 O 5 1.0g / L, P0.1g / L, As0.5g / L, pH=11. Under the condition of room temperature and stirring speed of 150rpm, MnO is generated in situ 2 Is 80 times the theoretical amount (assuming MnO 2 With WO 3 The molar ratio is equal to 1 as the theoretical amount) Add the required reagent, that is, add 21.76g of potassium permanganate, and after it is dissolved, slowly add 46.78g of manganese sulfate (prepared to 200-300g / L of manganese sulfate solution), Finally, 11.0 g of NaOH was slowly added. Continue to stir for 2 hours and then filter, the filtrate contains WO 3 0.03g / L, V 2 O 5 0.02g / L, P0.01g / L, As0.045g / L, Mo75g / L.

Example Embodiment

[0020] Example 3. 1L of sodium molybdate solution, containing Mo 100g / L, V 2 O 5 1.0g / L, pH=10. Under the condition of room temperature and stirring speed of 150rpm, MnO is generated in situ 2 Is 40 times the theoretical amount (assuming MnO 2 With V 2 O 5 The molar ratio is equal to 1 as the theoretical amount.) Add the required reagent, that is, add 13.88g of potassium permanganate, and after it is dissolved, slowly add 29.84g of manganese sulfate (prepared to 200-300g / L of manganese sulfate solution), Finally, 7.02g of NaOH was slowly added. Continue to stir for 1 hour and then filter, the filtrate contains V 2 O 5 0.06g / L, Mo 98g / L.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a method for removing tungsten, vanadium, phosphorus and arsenic from a molybdenate solution by deposition. The method comprises that: a reagent is added into the molybdenate solution to generate a precipitator in the solution, and by the precipitator, the impurities of tungsten, vanadium, phosphorus and arsenic in the solution are removed. The method has the advantages of removing various impurities at the same time and having high impurity removing degree, along with little loss of molybdenum, short flow, simple equipment, easy implementation, low cost and no environmental pollution.

Description

Technical field: [0001] The invention belongs to the purification of metal solutions in the extraction of nonferrous metals, in particular for the purification of tungsten, vanadium, phosphorus and arsenic in molybdate solutions for preparing ammonium molybdate, sodium molybdate and molybdenum oxide. Background technique: [0002] With the development of science and technology, the requirements for the content of impurity elements tungsten, vanadium, phosphorus and arsenic in molybdenum metallurgical products are becoming more and more stringent. my country's national standard GB / T3480-2007 stipulates that MSA-0 grade molybdenum acid is based on the content of tungsten and phosphorus in the product. , arsenic are not more than 150ppm, 5ppm, 5ppm respectively, and although the national standard for vanadium does not clearly stipulate its content requirements, but in the molybdenum smelting industry, the vanadium content in ammonium molybdate is required to be not more than 15pp...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C01G39/00
Inventor 赵中伟霍广生李洪桂陈爱良刘晶
Owner CENT SOUTH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap