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

Method for preparing barium nitrate, calcium nitrate, calcium sulfate and sodium nitrate by utilizing middle and low grade barium carbonate ore

A low-grade, barium nitrate technology, applied in the preparation of calcium/strontium/barium nitrate, calcium/strontium/barium sulfate, alkali metal nitrate, etc., can solve the problems of environmental pollution, high production cost, and high cost of method 1

Inactive Publication Date: 2009-10-21
SICHUAN UNIV
View PDF0 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The disadvantages of the above three methods are: the purity is relatively poor, generally up to 99.0% (international first-class), and rarely reaches 99.3% (international excellent grade), this purity can no longer meet the requirements of other industries; the production cost is higher; while the method 3 There are also waste residue and poisonous gas (H 2 S) discharge, pollute the environment
[0012] Its disadvantages are: poor product purity, limited resources, and environmental pollution
[0016] Its disadvantages are: the cost of method 1 is high; the waste residue of method 2 has not been utilized

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 preparing barium nitrate, calcium nitrate, calcium sulfate and sodium nitrate by utilizing middle and low grade barium carbonate ore
  • Method for preparing barium nitrate, calcium nitrate, calcium sulfate and sodium nitrate by utilizing middle and low grade barium carbonate ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 1. Preparation of barium nitrate

[0043] 140g of circulating mother liquor with a concentration of 20.5wt% was added to a reaction kettle with a stirrer and a thermometer, and the mixture containing 35.5wt% BaCO was added under stirring. 3 and 58.3 wt% CaCO 3 50g parts by weight of medium and low-grade barium carbonate mineral powder, and 88g parts by weight of nitric acid with a concentration of 51.0wt%, were dissolved at room temperature for 15 minutes, heated to 60°C, stirred and reacted for 10 minutes, cooled to room temperature, and when pH=5.0, filtered to remove fine particles slag, and the crude product Ba(NO 3 ) 2 Crystal and filtrate 201g, crude product Ba(NO 3 ) 2 The crystal is redissolved, filtered to remove the coarse slag, the filtrate is cooled, crystallized, and separated: the solid is dried to obtain 30g of barium nitrate product, with a yield of 97% and a purity of 99.70wt%; the separated liquid is returned to the reconverted solution for use as ...

Embodiment 2

[0047] 1. Preparation of barium nitrate

[0048] 174.5g of circulating mother liquor with a concentration of 40wt% was added to a reaction kettle with a stirrer and a thermometer, and the mixture containing 66.5wt% BaCO was added under stirring. 3 and 18.4 wt% CaCO 3 50g of medium and low-grade barium carbonate ore powder, and 60g of nitric acid with a concentration of 51.0wt%, were dissolved at room temperature for 25 minutes, heated to 39°C, stirred and reacted for 110 minutes, cooled to room temperature, when pH=5.5, filtered to remove fine slag, and simultaneously obtained Crude Ba(NO 3 ) 2 Crystal and filtrate 202g, crude product Ba(NO 3 ) 2 The crystal is redissolved, filtered to remove the coarse slag, the filtrate is cooled, crystallized, and separated: the solid is dried to obtain 43.2g of barium nitrate product, the yield is 98%, and the purity reaches 99.8wt%; the separated liquid is returned to the reconverted solution use.

[0049] 2. Preparation of Calcium ...

Embodiment 3

[0052] 1. Preparation of barium nitrate

[0053] 160g of circulating mother liquor with a concentration of 38wt% was added to a reaction kettle with a stirrer and a thermometer, and the mixture containing 45.1wt% BaCO 3 and 39.8 wt% CaCO 3 50g of crushed ore powder of middle and low grade barium ore, and 86.5g of nitric acid with a concentration of 46.1wt%, were dissolved at room temperature for 25 minutes, heated to 50°C, stirred for 10 minutes, cooled to room temperature, and when pH = 6.0, filtered to remove fines slag, and the crude product Ba(NO 3 ) 2 Crystal and filtrate 199.8g, crude product Ba(NO 3 ) 2 The crystal is redissolved, filtered to remove the coarse slag, the filtrate is cooled, crystallized, and separated: the solid is dried to obtain 29.0 g of barium nitrate product by weight, with a yield of 98% and a purity of 99.78 wt%. Solvent used.

[0054] 2. Preparation of Calcium Sulfate

[0055] A part of 160g of the filtrate in step (1) is used as the next ...

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 for preparing barium nitrate, calcium nitrate, calcium sulfate and sodium nitrate by utilizing a middle and low grade barium carbonate ore, which is characterized in that the middle and low grade ore of BaCo3 with the content of between 30 and 72 weight percent and CaCO3 with the content of between 15 and 45 weight percent and nitric acid react to prepare the barium nitrate and the calcium nitrate; or the middle and low grade ore and the nitric acid react to prepare the barium nitrate, the double decomposition reaction of a residual mother solution (a calcium nitrate solution) and sodium sulfate are performed to prepare the calcium sulfate and the sodium nitrate, and a small amount of acid undissolved substance is used for cement additive. The method achieves the comprehensive utilization of raw materials, has no discharge of three wastes, and has the advantages of cleanliness, environmental protection, high product quality, and low cost.

Description

technical field [0001] The invention relates to a method for preparing barium nitrate, calcium nitrate, calcium sulfate and sodium nitrate by utilizing medium and low-grade barium carbonate ore, belonging to the field of inorganic fine chemicals. Background technique [0002] Barium carbonate ore, commonly known as "toxic stone", is a rare mineral in the world. Only Mexico and the United Kingdom have discovered this mine in the world, and the mining has now come to an end. The only extra-large barium ore discovered in my country, the industrial reserves (BaCO 3 ≥68%) about 38 million tons. Has now formed an annual mining capacity of 300,000 tons, and BaCO 3 % = 30-60% is about 400-600 million tons, which has not been exploited so far. [0003] At present, the production methods of industrial-grade barium nitrate at home and abroad include: [0004] 1. Industrial grade barium carbonate (98%) reacts with industrial grade nitric acid (98%) to produce; [0005] 2. Industri...

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): C01F11/38C01F11/46C01D9/12
Inventor 刘明理冯方波王安东
Owner SICHUAN UNIV
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