123rd General Meeting of the KCS

Type Poster Presentation
Area Inorganic Chemistry
Room No. Exhibition Hall 2
Time 4월 18일 (목요일) 11:00~12:30
Code INOR.P-25
Subject Effect of magnesium silicate composition and hardness on the purification ability of polyol
Authors Jhong Ryul Yoo, HongBeom Shin, Sungho Park*
Department of Chemistry, Daejin University, Korea
Abstract The magnesium silicate, which is a porous material, purifies the polyol contained impurities (eg, KOH, H2O) using adsorption, and this purification ability is evaluated in relation to the particle size and surface area of the magnesium silicate. The synthesized magnesium silicate is prepared as a powder for purification through a drying and grinding process and the particle size was changed according to hardness of dried magnesium silicate. The magnesium silicate synthesized by reacting sodium silicate solution with magnesium ion was synthesized by changing the reaction conditions such as magnesium source (MgSO4, MgCl2, Mg(NO3)2) and sodium silicate solution(No.2–Na2O:SiO2=1:2.7, No.3-Na2O:SiO2= 1:3.2). The changes of hardness and Mg / Si composition ratio according to the reaction conditions were analyzed. After drying, the hardness of magnesium silicate increased in the order of MgCl2, MgSO4 and Mg(NO3)2, and the composition ratio of magnesium silicate increased from 3.8 to 4.8 in the order of MgCl2, MgSO4 and Mg(NO3)2. That is, the higher the Si content is, the more the strength of the silicate is increased. As the physical strength increased, the average particle size increased from 17 ㎛ to 30 ㎛ and the number of nanoparticles below 1 ㎛ decreased. The changes of hardness and composition of magnesium silicate were not observed depending on the type of sodium silicate solution. The purification ability of magnesium silicate according to the reaction conditions was evaluated by comparing the purification ability and the purification filtration time by measuring pH change and filtration time after polyol purification.
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