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

A method for controlling the grain growth process of nano-layered mgFe hydrotalcite

A grain growth, nano-layered technology, applied in nanotechnology, chemical instruments and methods, iron compounds, etc., can solve the problems of large crystal size of hydrotalcite and the inability to control the crystal size effectively, and achieves inhibition of aggregate growth, control The effect of preparation cost

Inactive Publication Date: 2019-10-25
NORTHEAST GASOLINEEUM UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] An object of the present invention is to provide a method for regulating and controlling the growth process of nano-layered MgFe hydrotalcite grains, and the method for regulating and controlling the growth process of nano-layered MgFe hydrotalcite grains is used to solve the problem that the current hydrotalcite crystal particle size is relatively large. Problems such as crystal size cannot be effectively controlled

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 method for controlling the grain growth process of nano-layered mgFe hydrotalcite
  • A method for controlling the grain growth process of nano-layered mgFe hydrotalcite
  • A method for controlling the grain growth process of nano-layered mgFe hydrotalcite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The control method of the growth process of MgFe hydrotalcite synthesized only by segmental crystallization method:

[0027] Prepare 0.4mol / L of Mg(NO 3 ) 2 and 0.1mol / L Fe(NO 3 ) 3 25mL each and mix well, where M 2 + :M 3+ (Mg:Fe)=4:1 (molar ratio), stir the above mixed metal nitrate solution evenly. Adopt the NaOH solution of deionized water preparation 3mol / L as precipitating agent, and add the NaOH solution of 3mol / L dropwise to above-mentioned mixed metal nitrate solution, precipitation occurs in the mixed solution, stop dripping when the pH value of the solution=10, Stir and mix evenly, transfer the mixed solution to a polytetrafluoroethylene-lined stainless steel reactor, crystallize at 180°C for 1 hour, and then continue to crystallize at 100°C for 24 hours. After crystallization, the product in the reactor was taken out, centrifuged and washed until the filtrate pH=7, and dried at 80°C for 24 hours to obtain a hydrotalcite product.

[0028] from figure...

Embodiment 2

[0030] The regulation method of the growth process of synthetic MgFe hydrotalcite only by adding organic steric hindrance agent:

[0031] A 3 mol / L NaOH solution was prepared with deionized water as a precipitant. At the same time, 0.4mol / L of Mg(NO 3 ) 2 and 0.1mol / L Fe(NO 3 ) 3 25mL each and mix well, where M 2+ :M 3+ (Mg:Fe)=4:1 (molar ratio). Stir the above mixed metal nitrate solution evenly, and add 3mol / L NaOH solution dropwise to it, precipitation appears in the mixed solution, stop the dropwise addition when the pH value of the solution=10, and then add triethanolamine with 5% of the total mass of the solution , stirred and mixed evenly, the mixed solution was transferred to a polytetrafluoroethylene-lined stainless steel reactor, and crystallized at 180° C. for 24 hours. After crystallization, the product in the reactor was taken out, centrifuged and washed until the filtrate pH=7, and dried at 80°C for 24 hours to obtain a hydrotalcite product.

[0032] from...

Embodiment 3

[0034] The control method of the nano-layered MgFe hydrotalcite grain growth process of the present invention:

[0035] Prepare 0.4mol / L of Mg(NO 3 ) 2 and 0.1mol / L Fe(NO 3 ) 3 25mL each and mix well, where M 2 + :M 3+ (Mg:Fe)=4:1 (molar ratio), stir the above mixed metal nitrate solution evenly. Adopt the NaOH solution of deionized water preparation 3mol / L as precipitating agent, dropwise add the NaOH solution of 3mol / L in the above-mentioned mixed metal nitrate solution, precipitation occurs in the mixed solution, stop dripping when the pH value of the solution=10, Then add triethanolamine with 5% of the total mass of the solution, stir and mix evenly, transfer the mixed solution to a polytetrafluoroethylene-lined stainless steel reactor, react at 180°C for 2h, and continue crystallization at 100°C for 24h . After the crystallization, the solid product in the reactor was taken out, centrifuged and washed until the filtrate pH=7, and dried at 80°C for 24 hours to obta...

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
sizeaaaaaaaaaa
sizeaaaaaaaaaa
sizeaaaaaaaaaa
Login to View More

Abstract

The present invention relates to a method for controlling the growth process of nano-layered MgFe hydrotalcite grains. The method for controlling the growth process of nano-layered MgFe hydrotalcite grains: (1) preparing Mg(NO 3 ) 2 solution, Fe(NO 3 ) 3 Solution, mix evenly, so that the Mg / Fe molar ratio in the solution is 1:10‑10:1; (2) Add NaOH precipitant dropwise to the solution prepared in step (1), and stir continuously, so that the pH of the solution is 8 -12; (3) Crystallize at 140°C-220°C for 0.5h-6h, then continue to crystallize at 70°C-120°C for 12h-36h, the amount of organic steric hindrance added in the hydrothermal synthesis system is the total mass of the solution 0.1%-20.0%, after the reaction, the solid product is isolated, washed and separated, and the obtained solid product is dried to obtain nano-sized layered MgFe hydrotalcite. The invention can prepare MgFe hydrotalcite with nanometer size and narrow crystal size distribution range.

Description

technical field [0001] The invention relates to a method for regulating the grain growth process of hydrotalcite, in particular to a method for regulating the grain growth process of nano-layered MgFe hydrotalcite. Background technique [0002] Hydrotalcite and hydrotalcite-like compounds, also known as layered double hydroxides (LDHs), are anionic compounds with a layered structure. Hydrotalcite crystals are hexagonal, and its structure is similar to brucite Mg(OH) 2 , the structural unit of brucite is MgO 6 octahedral, where the oxygen is OH - form exists. Hydrotalcite can be seen as the 2+ Al similar 3+ Substituting it into the derivatives of brucite formed in the octahedral structure, due to Al 3+ In order to balance the excess charge on the laminate, the anion enters the hydrotalcite layer, making the hydrotalcite system electrically neutral. Hydrotalcite is a class of tunable inorganic functional materials, and laminate cations can be combined with Mg 2+ Ions w...

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): C01G49/00B82Y40/00
CPCB82Y40/00C01G49/0036C01P2004/03C01P2004/62C01P2004/64
Inventor 陈彦广薛峰韩洪晶宋华张娇静张志秋张永军苑慧敏
Owner NORTHEAST GASOLINEEUM UNIV
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