Preparation system and process of silica sol

Abstract

The silica sol preparation system comprises a first dispersion barrel and an ultrasonic disperser which are circularly connected through a pipeline, the first dispersion barrel is connected with a precise ultrafine screening device, the precise ultrafine screening device is provided with an oversize product reflux inlet and a finished product outlet, the oversize product reflux inlet is connected with a second dispersion barrel, and the finished product outlet is connected with the ultrasonic disperser through a pipeline. The second dispersion barrel is connected with by-product drying treatment equipment, the finished product outlet is connected with a post-treatment tank group, the post-treatment tank group is connected with finished product packaging equipment, the first dispersion barrel and the precise ultrafine screening device, and the post-treatment tank group is connected with reverse osmosis water treatment equipment through a pipeline. According to the method, the principle of suspension filtration is utilized, the nano spherical silicon dioxide sol finished product is accurately extracted from the molten superfine spherical silicon dioxide suspension by adopting the high-strength inorganic composite material with the nano pore diameter; therefore, the process is simple, the operation energy consumption is low, the cost is low, and pollutants such as wastewater and waste gas are not generated.

Description

Technical field: [0001] The invention relates to the technical field of silica sol preparation, in particular to a preparation process of silica sol. Background technique: [0002] Silica sol is a dispersion of nano-sized silica particles in water or a solvent. At present, the large-scale production of silica sol is mainly water glass ion exchange process and elemental silicon dissolution process, and other processes (mainly silane hydrolysis synthesis process) are mostly in the laboratory research stage. These processes all introduce chemical agents for production, which seriously pollutes the environment and poses certain hazards to the health of operators; due to the introduction of chemical agents, the produced silica sol contains a large amount of ion pollution, and high-purity silica sol cannot be produced. , high-quality silica sol; these processes are complicated, the reaction cycle is long, and there are many control factors, so the investment and operation costs a...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a preparation process of silica sol, which solves the problems of complex process, serious pollution to the environment and high operating cost in the prior art

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