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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0023] Example 1

[0024] The present embodiment provides an environment-friendly synthetic hydrotalcite process, the following steps:

[0025] (1) The basic magnesium carbonate, ferrocene after soaking pumice chloroform saturated solution was added to the reaction vessel, was added 10 times the mass of pumice water, stirred for 1 hour;

[0026] (2) The basic magnesium carbonate and aluminum hydroxide molar ratio: 1: 1 ratio weighed aluminum hydroxide, and aluminum hydroxide is added to the kettle and heated to 200 ℃, the reaction 2.5h, after the reaction was cooled to room temperature;

[0027] (3) Step (2) obtained after the reaction solution obtained was filtered and the filtrate cake was recovered as the filtrate in step (1) in the reuse water; removing the filter cake was dried to a moisture content of less than pumice 0.5% or less obtained hydrotalcite finished.

Example Embodiment

[0028] Example 2

[0029] The present embodiment provides an environment-friendly synthetic hydrotalcite process, the following steps:

[0030] 1) The basic magnesium carbonate, ferrocene after soaking pumice chloroform saturated solution was added to the reactor, after addition of water 10 times the mass of pumice, stirred for 1 hour;

[0031] 2) The basic magnesium carbonate and aluminum hydroxide molar ratio: 3: 1 ratio of the weighed aluminum hydroxide, and aluminum hydroxide added to the kettle and heated to 180 ℃, the reaction 5h, cooled to room temperature after the reaction ;

[0032] 3) Step (2) obtained after the reaction solution obtained was filtered and the filtrate cake to recover the filtrate as a step (water 1) is reused; removing the filter cake was dried to a moisture content of less than pumice 0.5% or less finished product obtained hydrotalcite .

Example Embodiment

[0033] Example 3

[0034] The present embodiment provides an environment-friendly synthetic hydrotalcite process, the following steps:

[0035] 1) The basic magnesium carbonate, ferrocene after soaking pumice chloroform saturated solution was added to the reactor, after addition of water 10 times the mass of pumice, stirred for 1 hour;

[0036] 2) The basic magnesium carbonate and aluminum hydroxide molar ratio: 1: 1 ratio weighed aluminum hydroxide, and aluminum hydroxide added to the kettle and heated to 220 deg.] C, the reaction 2.0H, after the reaction was cooled to rt;

[0037] 3) Step (2) obtained after the reaction solution obtained was filtered and the filtrate cake to recover the filtrate as a step (water 1) is reused; removing the filter cake was dried to a moisture content of less than pumice 0.5% or less finished product obtained 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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