A kind of preparation method of nanoscale superfine sodium chloride

A sodium chloride and nano-level technology is applied in the field of preparation of nano-level ultrafine sodium chloride, which can solve the problems of good dispersibility, inability to obtain a particle size range, low yield and the like, and achieves a reduction in specific gravity and a uniform molding process. and continuous, the effect of inhibiting crystal growth

Active Publication Date: 2020-12-01
CHINASALT JINTAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are reports abroad that adopt this method to prepare sodium chloride particles, but only micron-sized sodium chloride can be produced
[0004] Although the liquid phase method, anti-solvent method, and layered crystallization method studied in the current technology can all produce nano-scale sodium chloride, the yield is low, the particle size distribution range is extremely wide, and it is impossible to obtain uniform and dispersed particle size ranges. Sodium chloride crystals with good properties and perfect crystallization

Method used

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  • A kind of preparation method of nanoscale superfine sodium chloride
  • A kind of preparation method of nanoscale superfine sodium chloride
  • A kind of preparation method of nanoscale superfine sodium chloride

Examples

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Effect test

Embodiment 1

[0033] At room temperature, dissolve 50g of sodium hydroxide and 5g of sodium stearate in 1Kg of absolute ethanol solution; dissolve 200g of fatty alcohol polyoxyethylene ether in 800g of hexadecane solution; mix the two evenly, and mix them thoroughly for 20 minutes Afterwards, HCl gas was fed into the mixture while stirring, the gas flow rate was 1 L / min, and the mixture was ventilated for 5 hours and then allowed to stand for 12 hours.

[0034] After standing still, acetone is added to destroy the state of the microemulsion by ultrasonication, centrifuged, and the collected precipitate is washed with acetone three times to collect crystals, and finally dried in a vacuum oven to obtain nano-scale sodium chloride. For its particle size distribution, see figure 1 , electron microscope see figure 2 .

Embodiment 2

[0036] At room temperature, dissolve 5g of sodium acetate and 0.5g of sodium stearate in 800g of absolute ethanol solution; dissolve 200g of lauryl ether phosphate in 1.5Kg of hexadecane solution; mix the two evenly and thoroughly After 20 min, HCl gas was fed into the mixture while stirring, the gas flow rate was 0.5 L / min, the mixture was ventilated for 5 h and then allowed to stand for 10 hours.

[0037] After standing still, acetone is added to destroy the state of the microemulsion by ultrasonication, centrifuged, and the collected precipitate is washed with acetone three times to collect crystals, and finally dried in a vacuum oven to obtain nano-scale sodium chloride. For its particle size distribution, see image 3 , electron microscope see Figure 4 .

Embodiment 3

[0039] At room temperature, dissolve 2 g of sodium bicarbonate and 0.1 g of sodium stearate in 400 g of absolute ethanol solution; dissolve 40 g of disodium sulfosuccinate monoester in 160 g of hexadecane solution; mix the two evenly, After thorough mixing for 20 minutes, HCl gas was fed in the stirred state, the gas flow rate was 0.5 L / min, the mixture was ventilated for 2 hours and then allowed to stand for 8 hours.

[0040] After standing still, acetone is added to destroy the state of the microemulsion by ultrasonication, centrifuged, and the collected precipitate is washed with acetone three times to collect crystals, and finally dried in a vacuum oven to obtain nano-scale sodium chloride. For its particle size distribution, see Figure 5 , electron microscope see Image 6 .

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Abstract

The invention belongs to the field of living salts and medical salts and particularly relates to a preparation method of nanoscale superfine sodium chloride, namely, a method for preparing nanoscale sodium chloride from nonaqueous microemulsion as a medium. Firstly, sodium-containing nonaqueous reverse microemulsion is prepared, then HCl gas is introduced into the sodium-containing nonaqueous reverse microemulsion and stirred fully, and sodium chloride crystals grow slowly by continuous reaction between HCl gas and sodium-containing components in the microemulsion. As proceeding of the reaction, byproducts permeate out of the microemulsion and are blended into an external environment. Inside of the microemulsion is an independent nano-environment, so that the crystals grow in the environment while forming size of the crystals is limited, and forming of the sodium chloride crystals can be well controlled by a crystal growth control agent for assistance. The particle size of the preparedsodium chloride crystals can reach nanoscale and is narrow and relatively uniform in distribution.

Description

technical field [0001] The invention belongs to the field of domestic salt and medical salt, and in particular relates to a preparation method of nanoscale ultrafine sodium chloride. Background technique [0002] Reducing the particle size of sodium chloride crystal materials to the nanometer level has a wide range of applications in the domestic salt industry and the pharmaceutical industry. The two most important applications are tooth powder and salt aerosol therapy. Tooth powder made of sodium chloride crystals not only has cleaning effect, but also can effectively inhibit bacteria, prevent caries, whiten teeth, stop bleeding, reduce inflammation, deodorize, desensitize, etc., and can comprehensively protect oral health. The particle size of the tooth powder is too large, it is easy to wear the surface of the teeth, and it is difficult to enter the deeper and finer tooth pits, so it cannot achieve deep whitening and antibacterial. Salt aerosol therapy has a wide range o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01D3/24B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01D3/24
Inventor 王卫东武奕李悦
Owner CHINASALT JINTAN
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