A comprehensive utilization method for producing potassium sulfate and magnesium resources by a magnesium sulfate conversion method

A technology of potassium sulfate and magnesium sulfate, which is applied in the field of salt chemical industry, can solve problems such as environmental pollution, loss of magnesium resources, and loss of potassium elements, and achieve the effects of improving system economic benefits, increasing potassium yield, and eliminating pollution

Active Publication Date: 2017-07-04
NANYANG ORIENTAL APPL CHEM RES INST
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The above-mentioned research and the proposed process method fail to solve the control problems of wastewater discharge and potassium element loss in the process, the potassium yield is still at a low level, and the production cost is high. At the same time, no comprehensive utilization method of magnesium element in the production process has been proposed. It not only leads to the discharge of a large amount of magnesium-containing wastewater, which pollutes the environment, but also causes the loss of magnesium resources and limits the improvement of potassium yield.

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
  • A comprehensive utilization method for producing potassium sulfate and magnesium resources by a magnesium sulfate conversion method
  • A comprehensive utilization method for producing potassium sulfate and magnesium resources by a magnesium sulfate conversion method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A comprehensive utilization method for producing potassium sulfate and magnesium resources by a magnesium sulfate conversion method, such as figure 1 shown, including the following steps:

[0042] Step 1: Add 20kg of crude potassium and 25.45kg of potassium chloride with a content of 83.59% to 298kg of potassium sulfate mother liquor and washing water, heat up to 60°C and dissolve completely, then filter to remove water insolubles to obtain potassium chloride solution.

[0043] Then the potassium chloride solution is sent into a one-step reaction process, 222kg of magnesium sulfate heptahydrate and 83kg of coarse langinite are added under stirring conditions, separated after reacting at 60°C for 120min, washed with an appropriate amount of water, and 225kg of langbeinite and zoleinite are obtained. Magneite mother liquor 425kg.

[0044] Step 2: send 425kg langbeinite mother liquor and 139kg coarse langbeinite mother liquor to the evaporating salt field, use natural con...

Embodiment 2

[0053] A comprehensive utilization method for producing potassium sulfate and magnesium resources by a magnesium sulfate conversion method, such as figure 2 shown, including the following steps:

[0054] Step 1: Add 210kg of crude potassium and 170Kg of potassium chloride (containing 90% KCl) to 2160kg of potassium sulfate mother liquor and washing water, heat up to 80°C and dissolve completely, then filter to remove water-insoluble matter to obtain potassium chloride solution.

[0055] Then the potassium chloride solution is sent into a one-step reaction process, 1540kg of magnesium sulfate heptahydrate and 470kg of coarse langinite are added under stirring conditions, separated after reacting at 80°C for 120min, washed with an appropriate amount of water, and 1560kg of langinite and leninite are obtained. Magnesite mother liquor 2990kg.

[0056] Step 2: Send 2990kg of langbeinite mother liquor and 1070kg of coarse langbeinite mother liquor to the evaporation salt field, us...

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 magnesium sulfate conversion method to produce potassium sulfate and a comprehensive utilization method for magnesium resources. In the process of the invention, the technical measure to control the potassium yield in the production process of potassium sulfate is to carry out the mother liquor and washing water at all levels produced in the production process. Fully closed recycling. The fully closed recycling of all levels of mother liquor (wastewater) and potassium elements has been realized, thereby increasing the potassium yield and making the potassium yield reach more than 92%. At the same time, by using old brine as raw material to prepare basic magnesium carbonate or magnesium hydroxide, the comprehensive utilization of magnesium element in the production process is realized and industrial salt is collected, which improves the economic benefits of the system and eliminates the pollution caused by waste water discharge to the environment .

Description

technical field [0001] The application belongs to the technical field of salt chemical industry, and specifically relates to a magnesium sulfate conversion method to produce potassium sulfate and a comprehensive utilization method of magnesium resources. Background technique [0002] The magnesium sulfate conversion method is one of the important preparation methods of potassium sulfate abroad, but due to the limitation of resource conditions, this method is rarely used in my country. Taking magnesium sulfate and potassium chloride as raw materials to prepare potassium sulfate is realized by two processes, and its process principle is: [0003] According to K + , Mg +2 / / Cl - , SO 4 、-H 2 The phase diagram of the O quaternary interaction system at 25°C was used as the basis for the calculation of ingredients, and then a two-step conversion process was used to prepare potassium sulfate. In the first step, potassium chloride and magnesium sulfate are reacted to prepare l...

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 Patents(China)
IPC IPC(8): C01D5/10C01D3/04C01F5/24C01F5/22
CPCC01D3/04C01D5/10C01F5/22C01F5/24C01P2006/80
Inventor 肖景波陈居玲夏娇彬
Owner NANYANG ORIENTAL APPL CHEM RES INST
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