Catalytic oxidation method for preparing sodium pyroantimonate from antimony ore

A technology of sodium pyroantimonate and antimony ore, which is applied in the direction of antimonate/antimonite and improvement of process efficiency, 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: 2005-11-23
GUANGXI UNIV
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • 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

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

Embodiment 1

[0022] To 450g of high-lead antimony ore containing 27.5% antimony and 28.5% lead, add 1.2L of a solution containing 120g / L of sodium sulfide and 12g / L of sodium hydroxide. Add 0.4g of sodium 2.6-dianthraquinone sulfonate to the filtrate, then transfer the solution into a steel pipe with a length of 2 meters and a diameter of 50 mm, blow air or oxygen into it, and control the temperature at about 95°C. After 6.5 hours of reaction, the rate of antimony precipitation Up to 99.5%, filtered, washed, and dried to obtain 205 grams of sodium pyroantimonate product. 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] To 220g antimony sulfide concentrate containing 55% antimony, add 1.2L of a solution containing 120g / L of sodium sulfide and 12g / L of sodium hydroxide, stir and react at 100°C for 50 minutes, filter, and add 2.6- to the filtrate 0.4g of sodium dianthraquinone sulfonate, then transfer it into a steel pipe with a length of 2 meters and a diameter of 50 mm, blow in air or oxygen, and control the temperature at about 95°C. After 7 hours of reaction, the antimony precipitation rate of the solution will reach 99.5%. Filter and wash , Dry 210 grams of sodium pyroantimonate product. Product quality analysis results are: 49.10% antimony, 12.70% sodium oxide, 0.0014% lead, 0.003% arsenic, 0.0047% iron, and 0.001% copper.

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

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 its derivative), 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 high oxidizing efficiency.

Description

Technical field [0001] The invention belongs to the field of methods for preparing sodium pyroantimonate from antimony ore by adopting a catalytic oxidation method. Background technique [0002] So far, there are many methods for preparing 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. Related technologies include: Chinese patent application <Production of sodium pyroantimonate from chlorine (salt) oxide>(Application No. 90105558) discloses a process for producing sodium pyroantimonate by using crude antimony powder as raw material, dissolving in hydrochloric acid, oxidizing chlorine or chlorate, hydrolyzing, and neutralizing sodium pyroantimonate. Chinese patent (patent number 85102490) and Chinese patent application (applica...

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