A kind of highly adsorbed and highly dispersed silicon dioxide and its preparation method

Abstract

Disclosed are a preparation method for a high-adsorption and high-dispersion silicon dioxide and the silicon dioxide prepared thereby. The method comprises: I. adding Carbopol resin to a sodium sulfate solution and stirring same to obtain a mixed solution; II. adding the mixed solution to a reaction kettle, adding a sodium silicate solution under stirring, heating same to 80ºC-90ºC, adding sulphuric acid, stopping the addition of the sulphuric acid when the pH value is 8.0-9.0, and curing same; III. adding the sodium silicate solution and sulphuric acid simultaneously, and controlling the pH value at 8.0-9.0, continuing to add the sulphuric acid when the addition of the sodium silicate solution is completed, stopping the addition of the sulphuric acid when the pH value is 3.5-4.0, and stirring same to obtain a silicon dioxide slurry; and IV. filter pressing and washing the silicon dioxide slurry, and subjecting same to spray drying so as to obtain the high-adsorption and high-dispersion silicon dioxide with a particle diameter of 18-25 µm. The silicon dioxide particles are small and uniform, have high adsorption and high dispersion properties, and can be used as a detergent auxiliary which can be directly added to detergent and can bring about good anticaking and flow-aiding effects.

Description

technical field [0001] The invention belongs to the technical field of precipitated silica, and in particular relates to a highly adsorbed and highly dispersed silica and a preparation method thereof. Background technique [0002] Sodium tripolyphosphate was once recognized as an excellent laundry detergent builder in the world, but it was restricted because it would aggravate the problem of phosphorus-enriched nutrition in the water body, and was gradually replaced by 4A zeolite for washing. With the acceleration of the pace of life and the continuous improvement of the quality of family life, people's requirements for washing products are also getting higher and higher. Concentrated laundry detergent with high efficiency, decontamination, energy saving and environmental protection has become the mainstream trend of laundry detergent industry. Concentrated laundry detergent, with the characteristics of high density and high content of surfactant. The high content of surfa...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the technical problems of poor dispersion and large particle size existing in the existing high-adsorption silica, the present invention provides a preparation method of highly-adsorption and high-dispersion silica. By changing the preparation process, carbomer resin is used as the Additives, effectively expand the pore size, reduce the particle size, improve the dispersibility of the silica particles on the premise of maintaining high adsorption, and meet the good application in washing powder

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