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Magnesium, aluminum and rare earth three-element hydrotalcite, preparation and use thereof

A technology of hydrotalcite and rare earth elements, applied in rare earth metal compounds, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of poor crystallinity and difficult synthesis of products, and achieve the effect of high crystallinity and regular morphology

Inactive Publication Date: 2008-11-12
广东炜林纳新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, some diffraction peaks of the product are broadened and some diffraction peaks are missing, which indicates that the crystallinity of the product is not good
Zn-Al-Ce ternary hydrotalcites are not easily synthesized by co-precipitation

Method used

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  • Magnesium, aluminum and rare earth three-element hydrotalcite, preparation and use thereof
  • Magnesium, aluminum and rare earth three-element hydrotalcite, preparation and use thereof
  • Magnesium, aluminum and rare earth three-element hydrotalcite, preparation and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Step A: Mix 0.308g (1.2×10 -3 mol) of solid Mg(NO 3 ) 2 ·6H 2 O, 0.107g (2.85×10 -4 mol) of solid Al(NO 3 ) 3 9H 2 O, 0.008g (1.5×10 -5 mol) of solid Ce(NH 4 ) 2 (NO 3 ) 6 and 0.180g (4.0×10 -3 mol) of solid CO(NH 2 ) 2 Dissolve in 60ml deionized water. Stir the solution for 30 minutes to homogenize.

[0031] Step B: Transfer the above homogeneous solution to a hydrothermal reaction kettle with an inner substrate volume of 80ml, and tighten the lid of the kettle. The hydrothermal reaction kettle was placed in a blast drying oven at 120°C, and reacted for 24 hours.

[0032] Step C: After the reaction is complete, take out the reaction kettle and cool it to room temperature in air. The solid product was filtered, washed with deionized water, and dried in an oven at 50°C for 12 hours.

[0033] figure 1 It is the X-ray diffraction analysis (XRD) spectrogram of the magnesium aluminum cerium ternary hydrotalcite sample in embodiment 1, wherein the Mg / Al / Ce ...

Embodiment 2

[0037] Step A: Mix 0.308g (1.2×10 -3 mol) of solid Mg(NO 3 ) 2 ·6H 2 O, 0.090g (2.4×10 -4 mol) of solid Al(NO 3 ) 3 9H 2 O, 0.016g (3.0×10 -5 mol) of solid Ce(NH 4 ) 2 (NO 3 ) 6 and 0.180g (4.0×10 -3 mol) of solid CO(NH 2 ) 2 Dissolve in 60ml deionized water. Stir the solution for 30 minutes to homogenize.

[0038] Step B: Transfer the above homogeneous solution to a hydrothermal reaction kettle with an inner substrate volume of 80ml, and tighten the lid of the kettle. The hydrothermal reaction kettle was placed in a blast drying oven at 120°C, and reacted for 24 hours.

[0039] Step C: After the reaction is complete, take out the reaction kettle and cool it to room temperature in air. The solid product was filtered, washed with deionized water, and dried in an oven at 50°C for 12 hours.

[0040] image 3 It is the X-ray diffraction analysis (XRD) spectrogram of magnesium aluminum cerium ternary hydrotalcite sample in embodiment 2, wherein the Mg / Al / Ce molar...

Embodiment 3

[0042] Step A: Mix 0.308g (1.2×10 -3 mol) of solid Mg(NO 3 ) 2 ·6H 2 O, 0.107g (2.85×10 -4 mol) of solid Al(NO 3 ) 3 9H 2 O, 0.008g (1.5×10 -5 mol) of solid Ce(NH 4 ) 2 (NO 3 ) 6 and 0.180g (4.0×10 -3 mol) of solid CO(NH 2 ) 2 Dissolve in 60ml deionized water. Stir the solution for 30 minutes to homogenize.

[0043] Step B: Transfer the above homogeneous solution to a hydrothermal reaction kettle with an inner substrate volume of 80ml, and tighten the lid of the kettle. The hydrothermal reaction kettle was placed in a blast drying oven at 120°C, and reacted for 24 hours.

[0044] Step C: After the reaction is complete, take out the reaction kettle and cool it to room temperature in air. The solid product was filtered, washed with deionized water, and dried in an oven at 50°C for 12 hours.

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PUM

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Abstract

The invention discloses a magnalium rare-earth three-metaclass hydrotalcite which is synthesized by a hydro-thermal method, comprising the following structure formula of [Mg8 Al 2-X Rex (OH)20 CO3. gamma H2O, wherein the x is more than or equal to 0.1 and less than or equal to 0.33, the gamma is the number of crystallization water, and the Re is a rare-earth element. The rare-earth elements comprise La, Ce, Pr, Nd, Pm, Sm, Eu, etc. The magnalium rare-earth three-metaclass hydrotalcite is synthesized by taking nitrate, sulphate, chloride of rare-earth metal and salts of other soluble rare-earth metal as a rare-earth metal source, and the doped amount of the rare-earth metal in the magnalium rare-earth three-metaclass hydrotalcite is adjusted and controlled to a certain degree according to the adjustable and synthesized condition. The product has the characteristics of high crystallinity and regular shape. Compared with the prior layered double hydrotalcite, a layer plate of the magnalium rare-earth three-metaclass hydrotalcite consists of hydroxide formed by a bivalent and trivalent main group or transition metallic cations and hydroxide containing the rare-earth metal elements.

Description

technical field [0001] The present invention relates to a hydrotalcite, its preparation method and application, more specifically, the present invention relates to a magnesium aluminum rare earth ternary hydrotalcite, its preparation method and application. Background technique [0002] Hydrotalcites, also known as layered double hydroxides (LDHs for short), are a class of compounds with a layered structure, and their composition and structure can be adjusted in a wide range. By changing the type of metal cations on the hydrotalcite-like layer, or inserting different anions between its layers, its properties, especially its catalytic performance, can be tuned. Hydrotalcite-like compounds and their intercalation compounds can be widely used in various fields, such as catalysts and their carriers, ion exchangers or adsorbents, multifunctional infrared absorbing materials, PVC heat stabilizers, new flame-retardant materials, etc. [0003] Qin Kemin and others disclosed in "Gua...

Claims

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Application Information

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IPC IPC(8): C01G1/00C01F17/00
Inventor 郑德王丹
Owner 广东炜林纳新材料科技股份有限公司
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