Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for removing molybdenum, arsenic, antimony and stannum from tungstate solution

A tungstate and solution technology, which is applied in the field of tungsten smelting, can solve the problems of large tungsten loss and pollution, and achieve the effects of low production cost, simple equipment and short process

Active Publication Date: 2008-05-14
GRIMAT ENG INST CO LTD
View PDF0 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some manufacturers use the molybdenum sulfide method to remove molybdenum, that is, the MoO 4 2- Sulfide to MoS 4 2- , and then transformed into MoS 3 Precipitation removes molybdenum, the main disadvantage of this method is serious pollution, that is, in MoS 3 Toxic gas H is produced during formation 2 S, while the loss of tungsten is also large

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for removing molybdenum, arsenic, antimony and stannum from tungstate solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Get ammonium tungstate solution 100ml, wherein WO 3 220g / l, Mo 1.70g / l. First, during vulcanization, S 2- The amount of addition is calculated as an excess of 3.5g / l to add Na 2 S, vulcanized at 20°C for 24 hours; followed by adding the precipitant octadecyltrimethylammonium bromide, the addition amount is 0.9 times of the theoretical amount, that is, the organic precipitant dissolved in pure water is added to the tungstic acid at 20°C ammonium solution and stirred for 1.5 hours; finally, 15 g of fragmented activated carbon fibers were added and stirred for 0.5 hours, and filtered after standing for 0.5 hours. The filtered ammonium tungstate solution contains Mo 0.05g / l, and the molybdenum removal rate is 95.1%. The activated carbon fiber contains W<20ppm after being washed twice with pure water.

Embodiment 2

[0022] Get ammonium tungstate solution 100ml, wherein WO 3 120g / l, Mo 0.25g / l. During vulcanization, S 2- According to the calculation, add Na in excess of 3.0g / l 2 S; Add dodecyltrimethylammonium chloride after vulcanization at 20°C for 24 hours, and the amount of precipitant added is 5 times the theoretical amount, that is, the organic precipitant dissolved in pure water is added to tungsten at 20°C The ammonium acid solution was stirred for 2.0 hours; then 15 g of activated carbon was added and stirred for 0.5 hours, after filtration, the filtrate contained Mo 0.002 g / l, and the molybdenum removal rate was 99.0%.

Embodiment 3

[0024] Get sodium tungstate solution 100ml, wherein WO 3 80g / l, Mo 2.0g / l. The vulcanization is carried out under the condition of sodium tungstate solution pH=7.0, during vulcanization, S 2- The amount of addition is based on the calculation of an excess of 2.6g / l by adding Na 2 S; after vulcanization at 70°C for 2.0 hours, add cetyltrimethylammonium chloride and stir for 0.5 hours, the amount of precipitant added is 3 times the theoretical amount; after standing for 0.5 hours, filter and separate the filtrate Containing Mo 0.1g / l, molybdenum removal rate is 93.5%.

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 discloses a method of removing molybdenum, arsenic, antimony and tin from the tungstate solution, which belongs to technical field of chemistry and metallurgy. The invention is characterized in that firstly, the tungstate solution is vulcanized; secondly, the precipitator is added and mixed with the thiosalt of the impurity to form the organic compound sediment; thirdly, the adsorbate is added to process filter and separation; fourthly, the filtrate is tungstate solution without impurity, the filter residue is the adsorbate and the organic compound, the adsorbate can be reused through extrication- regeneration. The invention has the advantages of good performance of impurity removal, simple equipment, low production cost, short process, and convenient operation.

Description

technical field [0001] The invention belongs to the fields of chemistry and metallurgy, and particularly relates to a method for removing molybdenum, arsenic, antimony and tin from a tungstate solution in tungsten smelting. Background technique [0002] With the development of modern science and technology, on the one hand, people put forward higher and higher requirements for tungsten, tungsten alloys and tungsten compounds. Especially in recent years, the demand for high-purity and excellent performance tungsten and its products in the high-tech field On the other hand, due to the continuous mining of tungsten ore, the high-quality tungsten ore is gradually decreasing, so that people will have to deal with tungsten ore with low grade and complex impurity composition in the future. The difficult problem in the tungsten smelting process is the removal of impurities such as molybdenum and arsenic, especially the separation of molybdenum, especially when preparing high-purity ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C01G41/00
Inventor 惠志林林晨光崔舜李明周增林
Owner GRIMAT ENG INST CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com