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Preparation method of hydrotalcite-like compound with uniform particle size and high stability

A high stability, hydrotalcite technology, applied in hydrotalcite, chemical instruments and methods, inorganic chemistry, etc., can solve problems such as uneven particle size distribution, uneven temperature distribution, and poor microscopic mixing efficiency of hydrotalcite-like products

Pending Publication Date: 2019-11-01
王志胜
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention: In view of the poor microscopic mixing efficiency and uneven temperature distribution in the reactor in the current hydrotalcite-like preparation process, the large difference between the nucleation rate and the growth rate at different positions in the kettle leads to the prepared hydrotalcite-like Due to the defects of uneven particle size distribution, poor repeatability between batches and poor durability of hydrotalcite-like, a preparation method for hydrotalcite-like with uniform particle size and high stability is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Preparation of mixed slurry:

[0033] Put bean dregs and starch in a vacuum drying oven at a mass ratio of 5:1, dry for 3 hours at a temperature of 50°C and a vacuum of 100Pa to obtain dry materials, and put the dry materials and distilled water at a high temperature at a mass ratio of 1:10 In a high-pressure reactor, raise the pressure in the reactor to 0.5MPa, raise the temperature to 115°C, and react at constant temperature and pressure for 40 minutes to prepare a reaction mixture;

[0034] Put the above reaction mixture and hydrochloric acid with a mass fraction of 10% into a beaker at a mass ratio of 5:1, place the beaker in a water bath with a water bath temperature of 40°C, and mix and stir with a stirrer at a speed of 300r / min for 40min Prepare the acidic mixed solution, add aluminum chloride powder with 6% of the acidic mixed solution quality in the beaker, and continue to stir for 30 minutes to prepare the mixed slurry;

[0035] Preparation of modified disper...

Embodiment 2

[0042] Preparation of mixed slurry:

[0043] Put bean dregs and starch in a vacuum drying oven at a mass ratio of 5:1, dry for 3.5 hours at a temperature of 55°C and a vacuum of 150Pa to obtain dry materials, and put dry materials and distilled water at a mass ratio of 1:10 In a high-temperature and high-pressure reactor, raise the pressure in the reactor to 0.6MPa, raise the temperature to 120°C, and react at constant temperature and pressure for 45 minutes to prepare a reaction mixture;

[0044] Put the above reaction mixture and hydrochloric acid with a mass fraction of 12% into a beaker at a mass ratio of 5:1, place the beaker in a water bath with a water bath temperature of 45°C, and mix and stir with a stirrer at a speed of 350r / min for 45min Prepare the acidic mixed solution, add aluminum chloride powder with 7% of the acidic mixed solution quality in the beaker, and continue to stir for 35min to prepare the mixed slurry;

[0045] Preparation of modified dispersant:

...

Embodiment 3

[0052] Preparation of mixed slurry:

[0053] Put bean dregs and starch in a vacuum drying oven at a mass ratio of 5:1, dry for 4 hours at a temperature of 60°C and a vacuum of 200Pa to obtain dry materials, and put the dry materials and distilled water at a high temperature at a mass ratio of 1:10 In a high-pressure reactor, raise the pressure in the reactor to 0.7MPa, raise the temperature to 125°C, and react at constant temperature and pressure for 50 minutes to prepare a reaction mixture;

[0054] Put the above reaction mixture and hydrochloric acid with a mass fraction of 15% into a beaker at a mass ratio of 5:1, place the beaker in a water bath with a water bath temperature of 50°C, and mix and stir with a stirrer at a speed of 400r / min for 50min Prepare the acidic mixed solution, add aluminum chloride powder with 8% of the acidic mixed solution quality in the beaker, and continue to stir for 40min to prepare the mixed slurry;

[0055] Preparation of modified dispersant:...

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Abstract

The invention discloses a preparation method of a hydrotalcite-like compound with a uniform particle size and high stability, and belongs to the technical field of metal oxide preparation. According to the method provided by the invention, bean dregs and starch are mixed, proteins and plant fibers in the bean dregs are hydrolyzed to produce amino acid, cellulose and the like respectively through ahigh-temperature high-pressure reaction, hydroxyl groups in the cellulose and the plant fibers are oxidized to form carboxyl groups by using sulfuric acid and potassium permanganate, the carboxyl groups and ethylene glycol are subjected to an esterification reaction, so that a part of ester compounds are coagulated at the surfaces of the fibers, the plant fibers are used to bind components of thehydrotalcite-like compound to avoid non-uniform distribution of particle sizes of the hydrotalcite-like compound product, and the compatibility of the hydrotalcite-like compound with other materialsis improved; and organic components such as the cellulose and saccharide compounds are extracted from the bean dregs and the starch, the organic matter and other components in the hydrotalcite-like compound form a binder adsorption effect, mixing and crystallizing nucleation are performed at a high temperature, so that the structural strength of the hydrotalcite-like compound is improved, and thedurability and stability of the hydrotalcite-like compound are enhanced.

Description

technical field [0001] The invention discloses a method for preparing a hydrotalcite-like substance with uniform particle size and high stability, and belongs to the technical field of metal oxide preparation. Background technique [0002] Hydrotalcite-like (HTlc), also known as layered double hydroxyl complex metal oxide, is an anionic clay. The structure is similar to brucite. LDHs have a layered structure, tunability of layer elements and exchangeability of anions between layers. This special property in chemical and structural endows it with a variety of special properties, such as thermal stability, alkalinity and memory effect, etc., and has application prospects in many aspects such as thermal stabilizers, flame retardants, and new catalysts. [0003] HTlc has aroused widespread interest in recent years, because the structure and properties of HTlc determine its many potential applications in industrial production technologies, such as anion exchangers, sensors, opt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/00B82Y40/00
CPCB82Y40/00C01P2004/64C01F7/785
Inventor 王志胜
Owner 王志胜
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