Catalytic oxidation method for preparing sodium pyroantimonate from antimony ore

A technology of sodium pyroantimonate and catalytic oxidation, which is applied in the direction of antimonate/antimonite and improvement of process efficiency, etc., can solve the problems of increased production cost, long reaction time, high manufacturing cost, etc., and achieve low production cost, The effect of short oxidation reaction time and low quality requirements

Inactive Publication Date: 2003-12-24
GUANGXI UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

Its shortcoming is that special reaction equipment is required, and the height of the equipment is required to be about 25 meters, resulting in high manufacturing costs; on the other hand, its reaction time is too long, about 40 hours, and the pressure is too high, resulting in increased energy consumption. increased production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In 450g of high-lead antimony ore containing 27.5% antimony and 28.5% lead, add 120g / L sodium sulfide and 1.2L solution of 12g / L sodium hydroxide, stir and react at 100°C for 1.5 hours, filter, and Add 0.4 g of 2.6-dianthraquinone sodium xanthate to the filtrate, then move the solution into a steel pipe with a length of 2 meters and a diameter of 50 mm, blow in air or oxygen, control the temperature at about 95°C, and react for 6.5 hours. reach 99.5%, filtered, washed, and dried to obtain 205 grams of sodium pyroantimonate product. The product quality analysis results are: antimony 49.15%, sodium oxide 12.80%, lead 0.0011%, arsenic 0.005%, iron 0.0056%, copper 0.001%.

Embodiment 2

[0024] In 220g of antimony sulfide concentrate containing 55% antimony, add 1.2L of a solution containing 120g / L sodium sulfide and 12g / L sodium hydroxide, stir and react at 100°C for 50 minutes, filter, and add 2.6- Dianthraquinone Sodium Xanthate 0.4g, then move it into a steel pipe with a length of 2 meters and a diameter of 50mm, blow in air or oxygen, control the temperature at about 95°C, and react for 7 hours, the antimony precipitation rate of the solution reaches 99.5%, filter and wash , and dried to obtain 210 grams of sodium pyroantimonate product. The product quality analysis results are: antimony 49.10%, sodium oxide 12.70%, lead 0.0014%, arsenic 0.003%, iron 0.0047%, copper 0.001%.

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Abstract

A process for preparing sodium pyroantimonate from antimony ore by catalytic oxidizing method includes extracting the liquid extract from antimony ore, adding efficient catalyst (anthraquinone or itsderivative), and introducing air or oxygen gas to it for oxidizing the soluble antimony compound to become sodium pyroantimonate. Its advantages are low requirement to grade of antimony ore, and highoxidizing efficiency.

Description

technical field [0001] The invention belongs to the method field of preparing sodium pyroantimonate from antimony ore by adopting a catalytic oxidation method. Background technique [0002] So far, there are many ways to prepare sodium pyroantimonate. According to the starting materials used, these methods can be divided into two categories: [0003] The first type uses antimony trioxide (including antimony white and antimony oxide powder) as raw materials to prepare sodium pyroantimonate. The technology related to this has: Chinese patent application <chlorine (salt) oxide produces sodium pyroantimonate> (application number 90105558) discloses a kind of with coarse antimony powder as raw material, through hydrochloric acid dissolution, chlorine gas or chlorate oxidation, The process of producing sodium pyroantimonate by hydrolysis, neutralization and other chlorine (salt) oxidation methods. Chinese patent (patent No. 85102490) and Chin...

Claims

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Application Information

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IPC IPC(8): C01G30/02C22B3/04
CPCY02P10/20
Inventor尹作栋龙翔云
OwnerGUANGXI UNIV