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Artificial hectorite and preparation method thereof

A hectorite, artificial technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of high consumption and high energy consumption, and achieve the effect of energy saving and emission reduction products and product optimization.

Inactive Publication Date: 2018-03-30
南京工业大学连云港工业技术研究院
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This will not only consume a lot of water, but also consume a lot of energy

Method used

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  • Artificial hectorite and preparation method thereof
  • Artificial hectorite and preparation method thereof
  • Artificial hectorite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Accurately weigh 31.00 g of deionized water and add it to a 50 mL beaker, then accurately weigh 0.27 g of LiF and add it to the above beaker, and stir for 10 min to obtain slurry A. Accurately weigh 2.33g Mg(OH)2, add it into slurry A, stir for 1h, and obtain slurry B. Accurately weigh 3.60g of SiO2, and add it into slurry B with slow stirring within 1.5h to obtain slurry C. The slurry C was transferred to a crystallization kettle lined with polytetrafluoroethylene, reacted at 180°C for 12 hours, and samples were taken for analysis at 0.5h, 1h, 2h, 4h, 6h, and 12h. After cooling, the reaction product was taken out and dried for 2 days to obtain hectorite.

[0027] Carry out XRD analysis to gained product respectively, as figure 2 , after crystallization for 0.5h, a large number of unreacted products remained in the product, including magnesium hydroxide and lithium fluoride. After 1 hour of reaction, the diffraction peaks of magnesium hydroxide and lithium fluoride ...

Embodiment 2

[0031] Place the hectorite samples prepared in Example 1 in a graduated cylinder filled with a certain amount of deionized water, mix well, add magnesium oxide, let it settle for 24 hours, and test the samples according to the "Non-metal Mineralization Performance Test Procedure DZG93-96" The colloidal value of the test. The result is as Figure 5 shown.

[0032] Place the hectorite samples prepared in Example 1 in a graduated cylinder filled with hydrochloric acid of a certain concentration, mix them evenly, and place them to settle for 24 hours. Test the expansion capacity of the samples according to the "Non-metal Mineralization Performance Test Procedure DZG93-96" . The result is as Figure 5 shown.

[0033] The colloidal value of the product increases with the increase of reaction time. However, the expansion capacity of the product reached the maximum at 6 h, and then decreased slightly with the increase of reaction time. Since the properties of the 6h product are ...

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Abstract

The invention discloses artificial hectorite and a preparation method thereof. The preparation method comprises the steps of: stirring deionized water and LiF evenly to obtain thick fluid A, putting Mg(OH)2 in the thick fluid A, performing even stirring to obtain thick fluid B, adding SiO2 into the thick fluid B, and performing even stirring to obtain thick fluid C; performing crystallization on the thick fluid C at 180+ / -10 DEG C, and performing drying to obtain the hectorite. According to the artificial hectorite and the preparation method thereof, an artificial hydrothermal method is adopted, and Mg(OH)2, SiO2 and LiF are used as the raw materials, so that the novel artificial hectorite is obtained; the problems of harsh reaction conditions, high raw material cost and the like in a traditional process are solved, energy saving and emission reduction can be achieved, and the product can be optimized.

Description

technical field [0001] The invention relates to a preparation method of laponite, in particular to a preparation method for synthesizing laponite by artificial hydrothermal method. Background technique [0002] Hectorite is a rare special clay, a layered silicate mineral containing magnesium and lithium, which has excellent dispersibility, thickening and adsorption. However, natural hectorite minerals are extremely scarce, and the impurity particle size distribution is wide, making it difficult to purify. Artificial hectorite is not only similar in structure and properties to natural hectorite, but also has high purity and excellent water swelling properties, so it has broad development prospects. The hydrothermal synthesis method has the characteristics of simple steps and mild reaction conditions. Under the appropriate raw material ratio and reaction conditions, hectorite products with small particle size distribution range and good thermal stability can be obtained. (Se...

Claims

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Application Information

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IPC IPC(8): C01B33/40
CPCC01B33/405C01P2002/72C01P2002/82C01P2002/88
Inventor 刘小祥王倩孙海超
Owner 南京工业大学连云港工业技术研究院
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