废旧硅橡胶裂解残余物制备纳米白炭黑试验
Chemical Production and Technology(2012)
Abstract
试验采用高温煅烧、酸浸、碱溶等提纯手段脱出残余物中的油分及Fe等显色金属氧化物,得较纯净的硅酸钠水溶液,采用溶胶-凝胶法制备白炭黑。结果表明,残余物在900℃煅烧2 h后用质量分数20%的HCl溶液在80~90℃酸浸3 h,盐酸用量为6 mL/g固体原料,二氧化硅获得率为50%;在碱溶除杂后的硅酸钠溶液中加入表面活性剂,在50℃下,控制体系pH=7~9,反应时间0.5 h,制得的溶胶白炭黑,经共沸干燥及在400℃煅烧2 h,获平均粒径为3.5μm的球形白炭黑。
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Key words
white carbon black,waste silicon rubber,cracking residue
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