Functional and Performance Characteristics of Soluble Silicates in Deinking. Part I: Alkaline Deinking of Newsprint/Magazine
نویسندگان
چکیده
The function(s) of soluble silicates in repulpinghashing and flotation deinking of waste newsprint/magazine were investigated extensively, under optimized conditions. During repulping/washing, silicate ’s response was characteristic of a buffer and a detergent. It was responsible for a 3.0% increase in I S 0 brightness. In repulping/flotation, silicate accounted for a 6.1% increase in I S 0 brightness. Part of this enhancement was likely caused by silicate’s ability to create larger ink particles which were more easily removed. Silicate also demonstrated detergency functions. In the presence of hydrogen peroxide, approximately half of silicate 5 function was the deactivation of metal ions, resulting in stabilization of peroxide.
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