Colloidal Silica production process characteristics and industrial applications
Wash the Colloidal Silica rubber is essential for the production process. Is to be formed by granular gel wash NazSO}, 7 {be the yin and yang from r (mainly H +, N expansion, SO was one, Si0 wear iY} r, etc.) to control the process within the requirements. At the same time it is an adjustment to the internal structure of particles (ie, aging) process. Exchange adsorption (ie, Na ten and H + exchange) phenomenon is the process of washing the wood glue one of the characteristics. Exchange adsorption of acid bubble process is the main process .1} 'a' and H + exchange and more in this process is complete. Far from the exchange to stop the washing process is just getting smaller and smaller exchange capacity. The concentration of acid bulbs, washing medium, washing temperature wash gel process is the main process parameters affecting the exchange rate and quantity. Characteristics of silicone finished hole is a big part of the aging process of mountain wash gel determined, and this process depends on the degree of aging, "a few wash gel medium, temperature. Wash the gel medium, the temperature control of a particle is the growth rate "of the main factors, namely, the increase by adjusting a particle" to adjust the pore structure of the goal. Inhibition of pore aging plastic washing requirements, therefore, necessary after the Colloidal Silica formation of granulation and the acid after short aging foam, plastic wash acidic media must start to finish, because the acidic medium (ie, H +) can be effectively inhibition of a particle 'grow up', the size of the head _ the amount of acid that determines the size of inhibition of aging while washing Colloidal Silica temperature should be lower, because aging is a process of energy absorption, low temperature, can be less for the aging of naturally small, ie pore Colloidal Silica washing the particles by inhibiting a 'grown up', to adjust the pore structure of the goal.
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