Combination preparation method for anhydrous magnesium chloride and potassium sulphate

A combined preparation technology of anhydrous magnesium chloride, applied in the direction of chemical instruments and methods, magnesium chloride, magnesium halide, etc., can solve the problems of cumbersome process operation, high production cost, environmental pollution, etc., achieve reasonable process, convenient operation, and reduce production cost Effect

Active Publication Date: 2011-06-29
HANGZHOU HI TECH FINE CHEM
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention mainly solves the technical problems of high production cost, cumbersome process operation and serious environmental pollution in the prior art.

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

[0022] Example: Dry the hydrogen chloride tail gas after producing anhydrous magnesium chloride, with a moisture content of 5% (V / V), and pass through a two-stage sulfuric acid drying tower (the first stage is 8% SO3 fuming sulfuric acid, the second The grade is 98% concentrated sulfuric acid), and the moisture content in the hydrogen chloride gas after drying is less than 0.1% (V / V). The dried hydrogen chloride gas is used to enter the fluidized bed to dry magnesium chloride dihydrate, the drying temperature is gradually increased from 200°C to 290°C within 30 minutes, and heating is continued at this temperature for 10 minutes to obtain anhydrous magnesium chloride product. The obtained anhydrous magnesium chloride product. The content of magnesium chloride is 96.20%, the water content is 0.21%, the magnesium oxide is 0.27%, and the rest are other salt impurities. The above products fully meet the requirements of electrolytic magnesium;

[0023] The dehydrated hydrogen chlorid...

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 present invention provides a combined preparation method of a waterless magnesium chloride and a potassium sulfate and meanwhile produces a hydrochloride. The technic proposal is that a hexahydrated magnesium chloride (MgCl2 question mark 6H2O) is dehydrated to a dihydrated magnesium chloride. A hydrogen chloride dry gas is dried and dehydrated to a waterless magnesium chloride in a fluidizedbed. The second step is that after a heat transfer, a dehydrated hydrogen chloride tail gas enters into a drying tower of a concentrated sulfuric acid and an oleum and the tail gas is dehydrated. Thedried hydrogen chloride is recycled. After absorbing the water, a dilute sulfuric acid enters into a sulfate production device to absorb a sulfur trioxide again and becomes the concentrated sulfuric acid. The redundant dilute sulfuric acid enters into a Mannheim device to produce a potassium sulfate and the produced hydrogen chloride produces the hydrochloride after being cleansed. The technologyproducing the waterless magnesium chloride, provided by the present invention, has the advantages of low cost, good quality, high purity quotient, low energy consumption and little environmental pollution.

Description

Technical field [0001] The invention relates to a method for preparing chemicals, in particular to a method that uses magnesium chloride hexahydrate (MgCl 2 ·6H 2 O) The process of preparing anhydrous magnesium chloride and simultaneously producing potassium sulfate and hydrochloric acid. Background technique [0002] my country is a country with large sea-lake salt resources, and magnesium in sea-lake salt is the resource second only to sodium in reserves. Take Qaidam Salt Lake as an example, the reserves of magnesium salt are as high as 4.81 billion tons. For a long time, the utilization of sea-lake salt resources has mainly focused on salt production or potassium extraction. During the process of potassium extraction, the average by-product is about 10 tons of magnesium chloride for every 1 ton of potassium chloride produced. Due to insufficient attention in production technology and deep processing, the production process The large amount of high-magnesium brine (magnesium c...

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): C01F5/30C01D5/00
Inventor 陈海贤于家波王雅琼
Owner HANGZHOU HI TECH FINE CHEM
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