Hydrotalcite preparation method

A kind of technology of hydrotalcite and species, applied in the field of preparation of hydrotalcite-like, to achieve the effects of less investment in equipment, high yield and high output

Active Publication Date: 2010-06-23
INST OF PROCESS ENG CHINESE ACAD OF SCI +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to basically overcome the defects of these existing preparation methods, thereby providing a kind of preparation method of hydrotalcites with simple process steps and equipment, low cost, large-scale operation and low energy consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 28.99g Cu(NO 3 ) 2 ·3H 2 O, 15.01g Al(NO 3 ) 3 9H 2 O, 2.4g NaOH and 6.46g Na 2 CO 3 Stir evenly first, then put it into a 300mL ball mill jar, in a high-energy ball mill (model SM230, Wuxi Xinguang Powder Processing Technology Co., Ltd.), with a speed of 200rpm, ball mill for 5 hours, wash three times, and dry at 80°C to obtain the required Hydrotalcite-like.

Embodiment 2

[0032] 34.5g ZnSO 4 ·7H 2 O, 90.01g Fe(NO 3 ) 3 9H 2 O, 4.8g NaOH and 4.24g Na 2 CO 3 Stir evenly first, then put it into a 300mL ball mill jar, in a high-energy ball mill (model SM230, Wuxi Xinguang Powder Processing Technology Co., Ltd.), with a speed of 50rpm, ball mill for 4 hours, wash three times, and dry at 80°C to obtain the required of hydrotalcites.

Embodiment 3

[0034] 34.5g ZnSO 4 ·7H 2 O, 15.01g Al(NO 3 ) 3 9H 2 O, 2.4g NaOH and 5.35g Na 2 CO 3 Stir evenly first, then put it into a 300mL ball mill jar, and in a high-energy ball mill (model SM230, Wuxi Xinguang Powder Processing Technology Co., Ltd.) at a speed of 300rpm, ball mill for 3 hours, wash three times, and dry at 80°C to obtain the required of hydrotalcites.

[0035] The XRD, infrared spectrogram and SEM figure of this product are respectively as follows Figure 1-3 shown by figure 1 It can be seen that there are three diffraction peaks (d 003 ) 0.812nm and two advanced reflective 0.437nm (d 006 ), 0.259nm (d 009), indicating that the crystallinity is very good and the crystal phase is single. Layer spacing 0.812nm, d 110 =0.153nm, which is the unit cell parameter a. Depend on figure 2 It can be seen from the infrared spectrum that 3435.77cm -1 It is the OH (laminate) vibration absorption front, 1384.40cm -1 for CO 3 -2 The (interlayer) vibration absorpti...

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Abstract

The invention relates to a hydrotalcite preparation method. Hydrotalcite is prepared in one step by adopting mechano-chemical process, the method includes uniformly mixing trivalent metal compound, divalent metal compound, solid base and carbonate, ball milling by a ball miller for 1-5 minutes, washing, and drying to obtain the required hydrotalcite. The invention has simple technological flow, less equipment investment, available main raw materials and low cost. The hydrotalcite obtained by the method has wide application for example, the hydrotalcite may be used as catalyst, catalyst precursor, ion exchanger or absorbent, medicine carrier, fire retardant and PVC heat stabilizer.

Description

technical field [0001] The invention relates to a preparation method of hydrotalcite-like. Background technique [0002] Hydrotalcite-like (HT for short) is a kind of synthetic anionic clay material developed rapidly in recent years, also known as layered double hydroxides (LDHs for short), its basic structure is: M x 2+ M' y 3+ (OH) 2x+3y-nz (A n- )·mH 2 O, M 2+ and M' 3+ represent divalent and trivalent cations, respectively, A n- Represents n-valent anions. For example, the most common is MgAl(OH) p ·qH 2 O. Hydrotalcite-like materials can be developed into a variety of functional materials, and are widely used as selective infrared absorption, ultraviolet blocking, non-toxic flame retardants with high smoke suppression and heat stabilizers for organic products, environmentally friendly catalysts, new adsorption materials, multifunctional carriers, ion Exchange materials, new medical materials, antibacterial and antifungal materials, and precursors for the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B13/14
Inventor 陈江超张冬海柴林玉陈运法李向阳张翀苗文华王国刚岳映雷张晖张忠
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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