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New method for osmium powder purification

A new method, the technology of osmium powder, applied in the field of chemical separation, can solve the problems of high production cost, incomplete distillation, and high equipment requirements, and achieve the effect of guaranteed product quality, less impurities, and low reaction temperature

Inactive Publication Date: 2018-10-16
南京东锐铂业有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former crushing process has high requirements on equipment, and the distillation is not thorough, requiring multiple recycling; the latter has a high dissolution rate and a high yield, but the production cost is also high and the investment in environmental protection is also large (the distillation raffinate is strongly acidic and requires Disposal before discharge)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] The present invention will be further described below in conjunction with specific examples.

[0019] 1. Pretreatment: Carry out corresponding pretreatment according to the shape of the osmium-containing material (the osmium content is greater than 20%), such as block, strip, and granular shape: crush, shear, and grind into a fine powder of negative 300-400 mesh. The particle size of osmium waste directly affects the subsequent distillation efficiency. The finer the particle size, the larger the solid-liquid contact area during oxidative distillation, the more fully the reaction, and the higher the distillation efficiency.

[0020] 2. Oxidative distillation: Taking a 10-liter distillation bottle as an example, take 50-100 grams of fine powder in step 1 each time, add 3-4 liters of sodium hypochlorite solution (concentration above 10%, fresh solution), and heat to 60-80°C And keep this temperature, slowly add hydrochloric acid solution (concentration: 6mol / L) dropwise un...

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Abstract

The invention relates to a new method for osmium powder purification. A direct distillation method with hydrochloric acid and sodium hypochlorite is adopted, and mixtures of osmium and osmium oxides based on osmium elementary substance are obtained; and then osmium powder with the purity of 99.5% and above is obtained through hydrogen reduction. According to the new method, the oxidation distillation with the sodium hypochlorite and the hydrochloric acid is adopted directly, and new dissolution reagents and the new method are applied; the working procedure of alkali fusion is omitted, and thetechnological process is shortened; the production cost is reduced; distillation residues are neutral, and can be discharged directly; the method is low in reaction temperature and less in impurity inclusions, and the product quality is guaranteed. The new method has the advantages of a short technological process, relatively less scattered wastes, and high dissolving efficiency and direct recovery rate of the osmium.

Description

technical field [0001] The invention relates to a chemical separation method, in particular to a new method for purifying osmium powder. Background technique [0002] Osmium is one of the platinum group elements, has strong catalytic activity, and is also a nutrient in the reduction process of the body. Domestic osmium mainly exists in nickel sulfide ore in the form of sulfide, and in other places mainly exists in iridium-osmium or ruthenium-osmium ore in the form of intermetallic compounds or semimetals. Osmium powder is mainly used in compounds, pastes, metals or functional alloy materials, and is widely used in traditional industries, high-tech, military industries, aerospace and other fields. [0003] The traditional purification methods of osmium powder mainly include zinc-aluminum fragmentation + oxidative distillation, alkali fusion + oxidative distillation. The former crushing process has high requirements on equipment, and the distillation is not thorough, requiri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B11/00C22B9/02B22F9/22
CPCB22F9/22C22B9/02C22B11/00Y02P10/20
Inventor 姚志刚王健李忠飞
Owner 南京东锐铂业有限公司
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