Preparation method of high-purity magnesium oxide from sea salt brine

A magnesium oxide and brine technology, applied in the direction of magnesium oxide, calcium/strontium/barium sulfate, electrolysis process, etc., can solve the problems of poor economic benefit, low product added value, utilization rate less than 20%, and achieve product yield High, enhance value, improve the effect of utilization

Inactive Publication Date: 2018-09-28
闫平科
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Seawater desalination, salt lake potassium extraction and other industries will also produce tens of millions of tons of concentrated seawater or brine rich in magnesium ions every year, but its utilization rate is less than 20%. The comprehensive utilization of resources and environmental protection are of great significance
Although my country is a big producer of magnesium salts, the industry is mainly in the production stage of primary products, the added value of products is low, and the economic benefits are poor. Therefore, vigorously developing and researching magnesium series fine products has broad market prospects.

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
  • Preparation method of high-purity magnesium oxide from sea salt brine
  • Preparation method of high-purity magnesium oxide from sea salt brine
  • Preparation method of high-purity magnesium oxide from sea salt brine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] A method for preparing high-purity magnesium oxide using sea salt brine as raw material, the technical scheme is carried out according to the following steps:

[0058] step 1:

[0059] Pump the sea salt brine to the reaction kettle, preheat the sea salt brine, set the reaction temperature to 50°C, and the reaction time to 60 minutes;

[0060] Step 2:

[0061] Add calcium hypochlorite to sea salt brine for decolorization reaction and stir, the weight ratio of calcium hypochlorite to sea salt brine is 1:2%, the reaction temperature is set at 50°C, and the stirring rate during the reaction is 480r / min. The reaction time is 1.5h. After the reaction is over, filter the slurry in the reactor to obtain filtrate A and filter cake A. The filter cake A is the decolorization residue, and the main component of the decolorization residue is CaSO 4 0.5H 2 O, can be sold directly as a by-product;

[0062] Step 3:

[0063] Pump the filtrate A to the reactor, add sodium bicarbonate...

Embodiment 2

[0073] A method for preparing high-purity magnesium oxide using sea salt brine as raw material, the technical scheme is carried out according to the following steps:

[0074] step 1:

[0075] Pump the sea salt brine to the reaction kettle, preheat the sea salt brine, set the reaction temperature to 60°C, and the reaction time to 50 minutes;

[0076] Step 2:

[0077] Add calcium hypochlorite to sea salt brine for decolorization reaction and stir. The weight ratio of calcium hypochlorite to sea salt brine is 1:1%, the reaction temperature is set at 70°C, and the stirring rate during the reaction is 360r / min. The reaction time is 1h. After the reaction, the slurry in the reactor is filtered to obtain the filtrate A and the filter cake A. The filter cake A is the decolorization residue, and the main component of the decolorization residue is CaSO 4 0.5H 2 O, can be sold directly as a by-product;

[0078] Step 3:

[0079] Pump the filtrate A to the reactor, add sodium bicarbon...

Embodiment 3

[0089] A method for preparing high-purity magnesium oxide using sea salt brine as raw material, the technical scheme is carried out according to the following steps:

[0090] step 1:

[0091] Pump the sea salt brine to the reaction kettle, preheat the sea salt brine, set the reaction temperature to 70°C, and the reaction time to 35 minutes;

[0092] Add calcium hypochlorite to sea salt brine for decolorization reaction and stir. The weight ratio of calcium hypochlorite to sea salt brine is 1:1%, the reaction temperature is set at 70°C, and the stirring rate during the reaction is 360r / min. The reaction time is 1h. After the reaction, the slurry in the reactor is filtered to obtain the filtrate A and the filter cake A. The filter cake A is the decolorization residue, and the main component of the decolorization residue is CaSO 4 0.5H 2 O, can be sold directly as a by-product;

[0093] Step 3:

[0094] Pump the filtrate A to the reaction kettle, add sodium bicarbonate to the...

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

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a preparation method of high-purity magnesium oxide from sea salt brine and belongs to the mineral processing field. The preparation method comprises (1), preheating the sea salt brine; (2), adding calcium hypochlorite to the sea salt brine to perform decolorization reaction so as to obtain filtrate A; (3), adding sodium bicarbonate to the filtrate A to perform calcium removing reaction so as to obtain filtrate B; (4) adding sodium hydroxide solution which is produced by electrolytic aqueous saturated sodium chloride to the filtrate B to obtain a filter cake C; (5), filtering the filter cake C by water, washing and drying to obtain magnesium hydroxide, (6) performing calcination and decomposition of the magnesium hydroxide to obtain high-purity magnesium oxide. Themethod has the advantages of simple production process, simple device, high yielding rate, low cost, no pollution to environments, and easy manufacturing. The material recycling is realized via electrolysis of sodium chloride, and the utilization of valuable elements in the sea salt brine and the quality of magnesium oxide are improved.

Description

technical field [0001] The invention belongs to the field of mineral processing, and in particular relates to a method for preparing high-purity magnesium oxide by using sea salt brine as a raw material. Background technique [0002] my country is a big sea salt producing country, with an annual output of more than 30 million tons of sea salt, and nearly 20 million tons of bittern as a by-product each year, of which the content of magnesium chloride is more than 10%. Seawater desalination, salt lake potassium extraction and other industries will also produce tens of millions of tons of concentrated seawater or brine rich in magnesium ions every year, but its utilization rate is less than 20%. The comprehensive utilization of resources and environmental protection are of great significance. [0003] In recent years, the development and manufacturing technology of foreign magnesium-based products has developed rapidly, especially the research on magnesium-based products with ...

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): C01F5/08C01F5/02C01F11/46C25B1/34
CPCC01F5/02C01F5/08C01F11/46C01P2002/72C01P2004/03C01P2006/80C25B1/34
Inventor 闫平科
Owner 闫平科
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap