Method for producing fibrous basic magnesium chloride Mg2(OH)3Cl.4H2O3monocrystal

A 3cl·4h2o, magnesium chloride technology, applied in magnesium chloride, chemical instruments and methods, magnesium halide and other directions, can solve the problems of increasing the complexity and cycle of process control, increasing the complexity of the process process, long reaction time, etc., and achieving a short preparation cycle , avoid requirements, the effect of simple process

Inactive Publication Date: 2009-03-11
XIDIAN UNIV
View PDF1 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the brine-ammonia method is that ammonia water is used under heating and stirring, because ammonia water is a volatile, corrosive and irritating liquid, which increases the danger of the preparation process or industrial production
[0013] (1) The use of ordinary light magnesium oxide, due to its activity, makes the reaction time too long (up to 72 hours, and it must be stirred and heated at the same time), which increases the complexity and cycle of process control
[0014] (2) The product needs to be washed multiple times, and the precipitate is washed with different

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 producing fibrous basic magnesium chloride Mg2(OH)3Cl.4H2O3monocrystal
  • Method for producing fibrous basic magnesium chloride Mg2(OH)3Cl.4H2O3monocrystal
  • Method for producing fibrous basic magnesium chloride Mg2(OH)3Cl.4H2O3monocrystal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] By weight percentage of the composition

[0057] Take 81% of crystalline magnesium chloride, 13.43% of calcium chloride, and 5.57% of calcium hydroxide. The three are directly heated to 50°C at the same time, and stirred for 2 hours at the same time, and the pH value is controlled at 8-9. At a temperature of 50°C, The proficiency time is 3 days. Obtain basic magnesium chloride whiskers with a length of about 15 microns to 25 microns, a diameter of about 1 micron to 1.5 microns, and an aspect ratio greater than 10, see Figure 4 .

Embodiment 2

[0059] By weight percentage of the composition

[0060] Take 85% of crystalline magnesium chloride, 9.7% of calcium chloride, and 5.3% of calcium hydroxide. The three are directly heated to 60°C at the same time, and stirred for 2 hours at the same time, the pH value is controlled at 8-9, and the subsequent skilled temperature is 60°C. The proficiency time is 4 days. Obtain basic magnesium chloride whiskers with a length greater than 50 microns, a diameter of about 1.5 microns, and an aspect ratio greater than 10, see Figure 5(a)-Figure 5(b) ; The electron diffraction results of the transmission electron microscope show that it is a single crystal, as shown in Figure 5(c).

Embodiment 3

[0062] By weight percentage of the composition

[0063] Take 83% of crystalline magnesium chloride, 11.5% of calcium chloride, and 5.5% of calcium hydroxide. The three are directly heated to 90°C at the same time, and stirred for 2 hours at the same time, the pH value is controlled at 8-9, and the subsequent skilled temperature is 60°C. The time is 2 days. Obtain basic magnesium chloride whiskers with a length greater than 10 microns, a diameter of about 0.2 microns, and an aspect ratio greater than 10, see Image 6 .

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
Lengthaaaaaaaaaa
Lengthaaaaaaaaaa
Login to view more

Abstract

The invention relates to a method for preparing fibrous alkali magnesium chloride Mg2(OH)3Cl.4H2O single crystal. The single crystal is prepared by the following compounds in weight percentage: 80.53 to 85.13 percent of crystal magnesium chloride, 9.3 to 13.87 percent of calcium chloride, and 5.29 to 5.58 percent of calcium hydroxide. The method for preparing the fibrous alkali magnesium chloride Mg2(OH)3Cl.4H2O single crystal by the compounds comprises the following steps: preparing the magnesium chloride and the calcium chloride into aqueous solution; adding calcium hydroxide powder to the aqueous solution; heating the mixed solution to the temperature of between 50 and 90 DEG C under the condition of continuously stirring, and controlling the pH value of the solution to between 8 and 9; stopping heating the solution and keeping the solution stand after the reacting solution is completely changed into white suspension; placing the suspension in an oven for boiling for 2 to 4 days at a temperature of between 50 and 90 DEG , after the suspension is deposited; and washing and filtering the deposition to obtain the fibrous alkaline magnesium chloride which has the diameter of between 0.2 and 3 microns and the length of between 10 and 100 microns, and has the advantages of high purity, good uniformity of crystal shape and stable composition.

Description

technical field [0001] The invention belongs to the technical field of chemical materials, and relates to fibrous basic magnesium chloride Mg under normal pressure 2 (OH) 3 Cl 4H 2 The invention discloses a preparation method of O single crystal, which is used to manufacture a flame retardant as an important precursor of magnesium aluminum hydrotalcite, fire protection or decoration materials. Background technique [0002] Basic magnesium chloride whiskers have the characteristics of good whiteness, strong activity and ultra-fineness, and have broad application prospects in the fields of flame retardancy, papermaking, fire protection and thermal sol fillers. Moreover, it is also an important precursor of flame retardants magnesium hydroxide whisker, magnesium oxide whisker and magnesium aluminum hydrotalcite. [0003] Fire prevention is a theme of modern social security. The development and application of applied materials with flame retardant function, so that the mater...

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): C30B29/12C30B29/62C30B7/14C01F5/30
Inventor 任庆利曾晓东罗强何彬
Owner XIDIAN UNIV
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