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Method for preparing hydrotalcite material

A technology for hydrotalcite and raw materials, which is applied in the field of room temperature solid-phase synthesis of hydrotalcite materials, achieving the effects of high yield, simple operation, and low energy consumption

Inactive Publication Date: 2010-06-23
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention adopts room temperature solid-phase method to prepare hydrotalcite material, which has not been reported before

Method used

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  • Method for preparing hydrotalcite material
  • Method for preparing hydrotalcite material

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Experimental program
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Embodiment 1

[0023] Mix 8.0 g (27.5 mmol) of cobalt nitrate hexahydrate and 3.4 g (9.2 mmol) of aluminum nitrate nonahydrate, and grind them thoroughly to obtain a metal salt mixture. In addition, 2.8g (26.4mmol) of sodium carbonate and 3.2g (80.3mmol) of sodium hydroxide were mixed and thoroughly ground to obtain a strong alkali mixture. Slowly add the strong base mixture into the metal salt mixture while grinding, and continue grinding for more than 50 minutes when the strong base mixture is completely added to the metal salt mixture; heat the obtained solid in a 50°C water bath for 12 hours, and then wash it with deionized water Wash and dry in an oven at 85°C for 12 hours to obtain the hydrotalcite material CoAl-HT-RTSSR-NO 3 . Such as Figure 1 It is shown that it has a phase-pure hydrotalcite structure identified by X-ray diffraction.

Embodiment 2

[0025] Mix 8.0g (27.5mmol) of nickel nitrate hexahydrate and 3.4g (9.2mmol) of aluminum nitrate nonahydrate, and grind them thoroughly to obtain a metal salt mixture. In addition, 2.8g (26.4mmol) of sodium carbonate and 3.2g (80.3mmol) of sodium hydroxide were mixed and thoroughly ground to obtain a strong alkali mixture. Slowly add the strong base mixture into the metal salt mixture while grinding, and continue grinding for more than 60 minutes when the strong base mixture is completely added to the metal salt mixture; heat the obtained solid in a water bath at 85°C for 10 hours, and then wash it with deionized water Wash and dry in an oven at 85°C for 12 hours to obtain the hydrotalcite material NiAl-HT-RTSSR-NO 3 . Such as Figure 1 It is shown that it has a phase-pure hydrotalcite structure identified by X-ray diffraction.

Embodiment 3

[0027] Mix 7.7g (27.5mmol) of cobalt sulfate heptahydrate and 3.1g (9.2mmol) of aluminum sulfate octadecahydrate, and grind them thoroughly to obtain a metal salt mixture. Another 3.7g (26.4mmol) of potassium carbonate and 4.5g (80.3mmol) of potassium hydroxide were mixed and thoroughly ground to obtain a strong base mixture. Slowly add the strong base mixture into the metal salt mixture while grinding, and continue grinding for more than 45 minutes when the strong base mixture is completely added to the metal salt mixture; heat the obtained solid in a 65°C water bath for 20 hours, and then wash it with deionized water Wash and dry in an oven at 85°C for 12 hours to obtain the hydrotalcite material CoAl-HT-RTSSR-SO 4 . Such as Figure 1 It is shown that it has a phase-pure hydrotalcite structure identified by X-ray diffraction.

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Abstract

The invention provides a method for preparing a hydrotalcite material, comprising the following steps: (1) mixing a solid divalent metal salt raw material and a trivalent metal salt raw material in a ratio of 2 to 1-4 to 1 of molar ratio of materials, and fully grinding; (2) mixing carbonate of 1-4 times of the quantity of trivalent metal salt matters and alkali of 2-3 times of the quantity of all metal ion matters, and fully grinding; (3) adding the mixture of the carbonate and the alkali in a metal salt mixture in multiple times, grinding following adding, and then fully grinding for more than 40 minutes; (4) putting a ground sample in a water bath of 65 DEG C for constant temperature for 12 hours, then washing the obtained solid product with deionized water, and drying to obtain a hydrotalcite material. The hydrotalcite material prepared by the method has the advantages of good quality, no dephasing measure, simple process, practicality, high yield, low cost, and the like.

Description

technical field [0001] The invention relates to a process for synthesizing a hydrotalcite material by a solid-phase method at room temperature, in particular to a method for preparing a hydrotalcite material. Background technique [0002] Hydrotalcite material is a layered compound composed of positively charged metal hydroxide layers and negatively charged anions filled between the layers, also known as anionic clay. Due to the unique structural characteristics, adjustable composition and pore structure, and excellent catalytic performance, it has shown broad application prospects in catalysis, industry, medicine, etc., and has attracted widespread attention. [0003] The preparation methods of hydrotalcite materials include co-precipitation method, ion exchange method, roasting reduction method, salt and oxide synthesis method, induced hydrolysis method, urea decomposition method, sol-gel method, and microemulsion method. There are many influencing factors in the preparat...

Claims

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Application Information

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IPC IPC(8): C01B13/14
Inventor 程鸿魁王爱琴张涛王晓东赵向云
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI