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Environment-friendly production process for high-purity montmorillonite

A production process, montmorillonite technology, applied in inorganic chemistry, non-metallic elements, silicon compounds, etc., can solve the problems of complex production operation, energy consumption, unsuitable application of montmorillonite, etc., to achieve high purity and wide application range Effect

Active Publication Date: 2013-05-01
乔敏 +2
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  • Description
  • Claims
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Problems solved by technology

Chinese patent document CN1803607A (200510120588.5) discloses a method for preparing high-purity montmorillonite, but this method uses the addition of chemical reagents to achieve the effect of separating montmorillonite, resulting in a large amount of harmful chemical substances in montmorillonite, and the purified montmorillonite Not suitable for use in the pharmaceutical and food industries
Chinese patent document CN101049940A (200710067840.X) discloses a method for ultrafine purification of montmorillonite. In the process of producing montmorillonite, the method does not express the control of process parameters and intermediates of materials in each link during the process of producing montmorillonite. indicators, so that the production process cannot be controlled, resulting in unstable quality of the output montmorillonite, especially the sterilization method of undescribed materials, which cannot be used in the pharmaceutical and food industries
Chinese patent document CN101844772A (201010185479.2) discloses a montmorillonite purification process, which overcomes the defects of the above-mentioned purification method to a certain extent, but has the following disadvantages: 1. The invention uses direct Crushing, causing a large amount of minerals such as cristobalite, quartzite, calcite, feldspar, and illite to be pulverized into fine powder in the whole extraction process, which increases the difficulty of post-processing and affects product quality; Bacteria adopt Co 60 Radiation methods, according to the National Ministry of Health on Co 60 Radiation sterilization dose standard "Healthy Medicine 1997 No. 38" notice, Co 60 The maximum dose of irradiation sterilization is 6KGY, and the Co 60 The radiation sterilization dose is 15KGY, which far exceeds the maximum dose of 6KGY stipulated by the Ministry of Health, and is not suitable for use in the pharmaceutical and food industries; 3. The invention uses a spray drying method, which does not indicate the concentration of the material entering the spray dryer, so that the concentration of the material Production capacity and moisture cannot be controlled; moreover, the temperature at the air inlet of the spray dryer is relatively high, and a large amount of energy is consumed at a temperature of 400-430°C. Fine pulverization makes the whole production operation complicated, and high temperature can cause fundamental changes in the chemical structure of montmorillonite

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Examples

Experimental program
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Effect test

Embodiment 1

[0046] Embodiment 1, a kind of high-purity montmorillonite environmental protection production process, the steps are as follows:

[0047] (1) Dry the bentonite raw material with a heating-type rotary drum dryer. The cylinder speed is controlled at 20r / min. The air temperature is 130°C, the outlet air temperature is 90°C, and dried in a dryer for 120 minutes until the moisture content is 1wt%;

[0048] Refer to "Chinese Pharmacopoeia 2010 Edition IX O" for the determination of swelling degree, take 5.0g of the dried sample, put it in a 100ml stoppered measuring cylinder, add 90ml of water, shake and mix, place for 10 minutes, shake 5 times in between , add water to dilute to 100ml, then shake it upside down 20 times, let it stand for 30 minutes, and measure the swelling degree to be 3.0;

[0049] Soak in purified water for 3 hours after drying, the mass ratio of dried bentonite raw material to purified water is 1:10; then disperse in a disperser, the dispersing shaft speed of...

Embodiment 2

[0062] Embodiment 2, a kind of high-purity montmorillonite environmental protection production process, the steps are as follows:

[0063] (1) Dry the bentonite raw material at 90°C until the water content is 10wt%, soak it in purified water for 1 hour, disperse evenly, let it stand for 30 minutes, and pass through a 200-mesh sieve to obtain a crude material liquid; the bentonite raw material: purified water is 1: 5. Mass ratio;

[0064] (2) Ultrasonic disperse the crude material liquid at 20°C for 10 minutes, and the ultrasonic frequency is 15KHz to obtain a suspoemulsion;

[0065] (3) Separate the suspoemulsion and hydrocyclone to remove the relative density > 2.5g / cm 3 After removing the material, pass through a 325-mesh sieve, and let it settle for 2 hours to obtain the settled material liquid; remove the moisture in the upper layer of the settled material liquid, and obtain the lower layer material with a dynamic viscosity of 20-40 Pa·s at 25°C;

[0066] (4) Sterilize t...

Embodiment 3

[0068] Embodiment 3, a kind of high-purity montmorillonite environmental protection production process, the steps are as follows:

[0069] (1) Dry the bentonite raw material at 160°C until the water content is 0.5wt%, soak it in purified water for 3 hours, disperse evenly, let it stand for 50 minutes, and pass through a 300-mesh sieve to obtain a crude material liquid; the bentonite raw material: purified water is 1 :10, mass ratio;

[0070] (2) Ultrasonic disperse the crude material liquid at 60°C for 50 minutes, and the ultrasonic frequency is 40KHz to obtain a suspoemulsion;

[0071] (3) Separate the suspoemulsion and hydrocyclone to remove the relative density > 2.5g / cm 3After the material is passed through a 400-mesh sieve, it is left to settle for 10 hours to obtain a settled material liquid; the upper layer of the settled material liquid is removed to obtain a lower layer material with a dynamic viscosity of 20-40 Pa·s at 25°C;

[0072] (4) Sterilize the lower layer m...

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Abstract

The invention relates to an environment-friendly production process for high-purity montmorillonite. The production process comprises the following steps: (1) drying, soaking, dispersing and sieving a bentonite raw material to obtain a crude solution of montmorillonite; (2) performing ultrasonic dispersion on the crude solution to obtain suspended emulsion; (3) performing cyclone separation on the suspended emulsion to remove a material with the relative density of more than 2.5g / cm<3>, sieving, standing, and removing water on the upper layer to obtain a material on the lower layer; (4) performing high temperature and high pressure cooperative ultrasonic sterilization on the material on the lower layer to obtain a sterilized material; and (5) performing centrifugal separation on the sterilized material, collecting a material with the relative density of less than or equal to 2.5g / cm<3>, drying, grinding until the average grain diameter of less than or equal to 45mu m, and sieving by using a 325-400-mesh sieve to obtain the montmorillonite. The environment-friendly production process ensures medication safety, clinical effectiveness and controlled quality, the process is simple and environment-friendly, the production efficiency is high, the production cost is low, the product quality is high, and industrial montmorillonite production is easily realized; and high temperature, high pressure and ultrasonic waves are combined for sterilization to ensure safety, reliability and a good sterilization effect.

Description

technical field [0001] The invention relates to an environment-friendly production process for high-purity montmorillonite, in particular to an environment-friendly production process for extracting high-purity montmorillonite from bentonite. It belongs to the technical field of pharmaceutical and chemical production. Background technique [0002] Montmorillonite is a layered mineral composed of extremely fine-grained hydrous aluminosilicate. Its name comes from the place where it was first discovered - Montmorillon in France. The smectite subgroup belongs to one of the smectite group minerals (the other subgroup is saponite), and is an important clay mineral, generally massive or earthy. The molecular formula of montmorillonite is (Al, Mg) 2 [Si 4 o 10 ](OH) 2 ·nH 2 O, in the middle is alumina octahedron, and the upper and lower sides are clay minerals with a three-layer sheet structure composed of silicon-oxygen tetrahedrons. Montmorillonite crystals are monoclinic h...

Claims

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Application Information

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IPC IPC(8): C01B33/40
Inventor 乔敏
Owner 乔敏
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