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

Method for preparing flame retardant grade magnesium hydroxide

A technology of magnesium hydroxide and flame-retardant grade, which is applied in the field of preparation of flame-retardant magnesium hydroxide, which can solve the problems of pollution, a large amount of magnesium oxide, waste environment, etc., and achieve the effects of simple equipment, environmental protection and waste avoidance

Active Publication Date: 2015-07-01
上海永青环保新材料有限公司
View PDF5 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a method for preparing flame-retardant magnesium hydroxide, and the method for preparing flame-retardant magnesium hydroxide solves the problems that may occur in the process of silicon steel in the prior art. A large amount of magnesia wastes cause technical problems of environmental pollution

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 flame retardant grade magnesium hydroxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] like figure 1 As shown, the present invention discloses a method for preparing flame-retardant magnesium hydroxide. The specific process is as follows: calcining the magnesia waste for oriented silicon steel in a muffle furnace 1 at 650°C for 5 hours to remove the carbon inside; then cooling, Under the condition of heating to 60°C and constant stirring, dissolve with hydrochloric acid in the dissolution tank 2, and the excess of hydrochloric acid is 1.25 times; then precipitate in the first sedimentation tank 3, the settling time is 5h, and remove the insoluble matter, including B, C, TiO 2 etc.; then add ammoniacal liquor in the above-mentioned solution in the first reaction tank 4, the proportioning of ammoniacal liquor is strong ammoniacal liquor: water=1:50, and the ammoniacal liquor amount is 1 / 25 of solution amount, and constantly feeds compressed air (makes Fe 2+ converted to Fe 3+ ), by controlling PH=9 to make Fe 3+ completely precipitated while Mg 2+ No pre...

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 provides a method for preparing flame retardant grade magnesium hydroxide. The method comprises the following steps: calcining the oriented silicon steel in a muffle furnace by use of magnesium oxide wastes, next, cooling, adding the calcined silicon steel magnesium oxide to a dissolving tank by use of the magnesium oxide wastes, dissolving by use of an acid, adding the dissolved magnesium oxide wastes to a settling tank for settling, removing the undissolved substances, guiding the solution into a reaction tank, adding ammonia water, and continuously introducing compressed air so that Fe<2+> can be transformed into Fe<3+>, controlling the pH so that the Fe<3+> is completely settled and Mg<2+> is not settled, removing Fe(OH)3 precipitate, next, adding ammonia water, ethanol and a surfactant to the solution obtained after settlement in the reaction tank, controlling the pH so that the Mg<2+> can be completely settled, and drying Mg(OH)2 to obtain the retardant grade magnesium hydroxide. The method is used for solving the problems of the technical flow of recycling the magnesium oxide waste for the silicon steel; and the waste of resources is avoided.

Description

technical field [0001] The invention belongs to chemical technology, and in particular relates to a magnesium hydroxide, in particular to a method for preparing flame-retardant magnesium hydroxide. Background technique [0002] At present, silicon steel is widely used in our daily life, but a lot of magnesium oxide waste will be produced in the process of preparing silicon steel. It will pollute our environment and waste our resources. Flame-retardant grade magnesium hydroxide was prepared from magnesia waste for oriented silicon steel to realize resource reuse and protect the environment. Contents of the invention [0003] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a method for preparing flame-retardant magnesium hydroxide, and the method for preparing flame-retardant magnesium hydroxide solves the problems that may occur in the process of silicon steel in the prior art. A large amount of magnesia wastes cause techn...

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): C01F5/14B09B3/00
Inventor 张娜孙玉见黄成杰付斌邱凡王娴婕李蓉
Owner 上海永青环保新材料有限公司
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