Novel quaternary layered double hydroxide (LDHs), its preparation method and application thereof

A new type of hydrotalcite technology, applied in the field of material science, can solve the problems of synthetic quaternary LDHs that have not been reported, and achieve the effects of ensuring environmental protection, avoiding waste of raw materials, and efficient conversion

Inactive Publication Date: 2012-12-12
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to the information we have checked, there is no report on the synthesis of quaternary LDHs

Method used

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  • Novel quaternary layered double hydroxide (LDHs), its preparation method and application thereof
  • Novel quaternary layered double hydroxide (LDHs), its preparation method and application thereof
  • Novel quaternary layered double hydroxide (LDHs), its preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take 0.065mol MgCl 2 ·6H 2 O, 0.535mol ZnCl 2 , 0.15mol AlCl 3 ·6H 2 O, 0.05mol FeCl 3 ·6H 2 O and 8.895g PEG were dissolved in deionized water to form mixed liquid A; another 1.28mol NaOH, 0.4mol NaOH 2 CO 3 Dissolved in deionized water to configure precipitant B.

[0019] Preparation: A and B solutions were magnetically stirred for 30 minutes and then ultrasonically treated for 15 minutes. Add the two mixtures into a self-made reactor and react quickly after high-pressure atomization; adjust the pH range of the system to keep it between 9-10, and finally place the obtained mixed slurry at a reflux temperature of 90°C Crystallize for 6h, filter, wash, and dry to obtain MgAlZnFe-CO 3 LDHs products.

Embodiment 2

[0021] Take 0.065mol MgCl 2 ·6H 2 O, 0.335mol ZnCl 2 , 0.15mol AlCl 3 ·6H 2 O, 0.05mol FeCl 3 ·6H 2 O and 7.051g PEG were dissolved in deionized water to configure mixed solution A; another 0.96mol NaOH, 0.4mol NaOH 2 CO 3 Dissolved in deionized water to configure precipitant B.

[0022]Preparation: A and B solutions were magnetically stirred for 30 minutes and then ultrasonically treated for 15 minutes. Add the two mixtures into a self-made reactor and react quickly after high-pressure atomization; adjust the pH range of the system to keep it between 9-10, and finally place the obtained mixed slurry at a reflux temperature of 90°C Crystallize for 6h, filter, wash, and dry to obtain MgAlZnFe-CO 3 LDHs products.

Embodiment 3

[0024] Take 0.32mol MgCl 2 ·6H 2 O, 0.08mol ZnCl 2 , 0.15mol AlCl 3 ·6H 2 O, 0.05mol FeCl 3 ·6H 2 O and 6.005g PEG were dissolved in deionized water to form mixed liquid A; another 0.96mol NaOH, 0.4mol NaOH 2 CO 3 Dissolved in deionized water to configure precipitant B.

[0025] Preparation: A and B solutions were magnetically stirred for 30 minutes and then ultrasonically treated for 15 minutes. Add the two mixtures into a self-made reactor and react quickly after high-pressure atomization; adjust the pH range of the system to keep it between 9-10, and finally place the obtained mixed slurry at a reflux temperature of 90°C Crystallize for 6h, filter, wash, and dry to obtain MgAlZnFe-CO 3 LDHs products.

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Abstract

The invention discloses a novel quaternary layered double hydroxide (LDHs), its preparation method and an application thereof. The novel quaternary layered double hydroxide is characterized by comprising raw materials of two divalent compounds (M<2+>), two trivalent metallic compounds (M<3+>), a precipitating agent and a modifier. The preparation method comprises the following specific steps of: (1) weighing a certain amount of the precipitating agent, M<2+>, M<3+> and the modifier, respectively dissolving them in deionized water, stirring for dissolution, and carrying out ultrasonic processing; (2) adding the mixed solution which has undergone ultrasonic processing into a self-made fog-type tapered reactor for nucleation with pH value maintained at 9-10; and (3) transferring into a crystallization kettle after nucleation and crystallizing at the temperature of 70-100 DEG C for 4-8 h, centrifuging, washing, and finally placing into a vacuum drying oven for drying so as to obtain the product. The reaction devices provided by the invention have simple structures and require little investment. The technology is simple and easy to operate and can be used to realize large-batch production. The LDHs nanoparticles have small particle size, are uniformly distributed, and can be widely applied in the fields of catalyst, acid adsorbent, molecular container, flame retardant material, medical and biological material, photoelectric material and the like.

Description

technical field [0001] The invention relates to the field of material science, in particular to a novel quaternary hydrotalcite (LDHs) and its preparation method and application. Background technique [0002] The Directive on Waste Electrical and Electronic Equipment and the Directive on the Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment promulgated by the European Union in 2003 made my country's annual export of electrical products directly affected by them reach 31.7 billion US dollars. At present, most of the flame retardants, heat stabilizers, infrared absorbing materials and other products in our society are still mainly harmful organic chemical products. Therefore, people pay more and more attention to clean and efficient functional inorganic chemical products, but the current market The inorganic products that only account for a small proportion in the world are far from meeting the huge needs of the society. Therefore, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/00
Inventor 刘跃军高鑫刘亦武
Owner HUNAN UNIV OF TECH
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