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Environment-friendly hydrotalcite synthesis process

A synthesis process, a technology of hydrotalcite, applied in the directions of aluminum compounds, inorganic chemistry, chemical instruments and methods, etc., can solve the problems of a large amount of waste water and environmental pollution, and achieve the effects of avoiding waste water, saving water resources, and avoiding the production of ammonia

Active Publication Date: 2021-12-21
双辽市康瑞生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem of producing a large amount of waste water and ammonia in the current hydrotalcite preparation process and causing high environmental pollution, the invention provides an environmentally friendly hydrotalcite synthesis process, and the adopted technical scheme is as follows:

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The present embodiment provides an environment-friendly hydrotalcite synthesis process, the specific steps are as follows:

[0025] (1) basic magnesium carbonate, the pumice stone soaked through ferrocene trichloromethane saturated solution are added in the reactor, after adding the water of 10 times of pumice stone quality, stir 1 hour;

[0026] (2) Weigh aluminum hydroxide according to the molar ratio of basic magnesium carbonate and aluminum hydroxide: 1:1, and add aluminum hydroxide into the reaction kettle, heat to 200°C, react for 2.5h, and cool after the reaction to room temperature;

[0027] (3) Obtain filtrate and filter cake after filtering the reaction solution obtained in step (2), reclaim the filtrate as the water reuse in step (1); dry and remove the filter cake of pumice until the moisture content is lower than 0.5% to obtain hydrotalcite finished product.

Embodiment 2

[0029] The present embodiment provides an environment-friendly hydrotalcite synthesis process, the specific steps are as follows:

[0030] 1) Add basic magnesium carbonate and pumice soaked in ferrocenetrichloromethane saturated solution into the reaction kettle, add water with 10 times the quality of pumice, and stir for 1 hour;

[0031] 2) Weigh aluminum hydroxide according to the molar ratio of basic magnesium carbonate and aluminum hydroxide: 3:1, and add aluminum hydroxide into the reaction kettle, heat to 180°C, react for 5 hours, and cool to room temperature after the reaction ;

[0032] 3) Filtrate the reaction solution obtained in step (2) to obtain filtrate and filter cake, reclaim the filtrate as the water in step (1) for reuse; dry and remove the filter cake of pumice until the moisture content is lower than 0.5% to obtain the finished product of hydrotalcite .

Embodiment 3

[0034] The present embodiment provides an environment-friendly hydrotalcite synthesis process, the specific steps are as follows:

[0035] 1) Add basic magnesium carbonate and pumice soaked in ferrocenetrichloromethane saturated solution into the reaction kettle, add water with 10 times the quality of pumice, and stir for 1 hour;

[0036] 2) Weigh aluminum hydroxide according to the molar ratio of basic magnesium carbonate and aluminum hydroxide: 1:1, and add aluminum hydroxide into the reaction kettle, heat to 220°C, react for 2.0h, and cool to room temperature;

[0037] 3) Filtrate the reaction solution obtained in step (2) to obtain filtrate and filter cake, reclaim the filtrate as the water in step (1) for reuse; dry and remove the filter cake of pumice until the moisture content is lower than 0.5% to obtain the finished product of hydrotalcite .

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Abstract

The invention discloses an environment-friendly hydrotalcite synthesis process, and belongs to the technical field of inorganic chemical industry. The process comprises the following steps: adding basic magnesium carbonate and a catalyst into a reaction kettle, adding water, stirring, adding aluminum hydroxide into the reaction kettle, heating for reacting, cooling to room temperature after the reaction is finished, and filtering and separating to obtain a filtrate and a filter cake; and recovering the filtrate as reaction water, and drying the filter cake to obtain the finished product. A mother liquor can be recycled, so that generation of a large amount of wastewater is avoided, and a large amount of water resources can be saved. Meanwhile, basic magnesium carbonate is used for replacing urea as a reaction raw material, so that ammonia is avoided, and the environmental protection pressure of enterprises is further reduced.

Description

technical field [0001] The invention belongs to the technical field of inorganic chemical industry, and in particular relates to an environment-friendly hydrotalcite synthesis process. Background technique [0002] Hydrotalcite (LDH) is a mineral with a layered structure, and part or all of the trivalent metals in its components can be replaced by tetravalent metals. Hydrotalcite can be used as alkaline catalyst, redox agent, catalyst carrier and ABS processing aid, etc. At the same time, hydrotalcite compounds can also be used as a medicament for treating gastric diseases, for example, in the preparation of gastritis, gastric ulcer, duodenal ulcer Wait for machine pump to use. LDH can also be widely used as an ion exchanger or adsorbent in printing and dyeing, papermaking, electroplating, and even nuclear wastewater treatment. [0003] The existing hydrotalcite production methods mainly consist of two types, namely liquid-phase method and liquid-solid method. The liquid-...

Claims

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Application Information

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IPC IPC(8): C01F7/00
CPCC01P2006/60Y02P20/584
Inventor 陶永玉
Owner 双辽市康瑞生物科技有限公司
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