高活性度活性白土的制备工艺研析.pdfVIP

5th Chinese National Chemical and Biochemical Engineering Annual Meeting 高活性度活性白土的制备工艺研究 1 1 1 卢国庆 ，韦藤幼 ，童张法 1 （广西大学化学化工学院，广西南宁 530004 ） 摘要：本研究是以钙基膨润土为原料，盐酸为改性剂，采用制浆干燥技术制备高活性度活性白土，这种白土是一种与膨润 土结构相同的氢型膨润土，可作为膨润土改性的基础。制浆干燥技术用于膨润土的改性方法是将适量的改性剂溶液与原料 膨润土混合成浆状，放入恒温干燥器中干燥，让反应在干燥过程中完成。单因素研究结果表明，在盐酸浓度为 5％，皂土 与盐酸溶液的质量比为1：2，改性温度为50℃干燥反应10 h 时，可得到活性度达到320 的活性白土，在酸用量为传统法 28％的情况下，其活性度比传统方法高 100。XRD 测定表明，在制浆干燥酸改性过程中，膨润土的结构没有被破坏，而传 统湿法酸改性过程中膨润土结构受到破坏，性能降低。 关键词：制浆干燥技术，盐酸，活性白土 中图法分类号：TD425 文献标示码：A 文章编号： Study of preparation technology of clay with high activation degree 1 1 1 Lu Guoqing , Wei Tengyou , Tong Zhangfa (School of Chemistry and Chemical Engineering of Guangxi University, Nanning Guangxi, 530004) Abstract: bentonite, as the raw material, was modified by hydrochloric acid by a new slurry-making-and-drying technology. It is a kind of H- bentonite with a similar structure of bentonite, which can be used as a basic material. The process was put bentonite with certain quality and hydrochloric acid with certain volume into the reactor and mixed uniformly firstly, then put the reactor into constant temperature drying oven. The result of single-factor experiments showed, activated clay with activation degree up to 320 was gained under the optimum conditions: the concentration of hydrochloric acid was 5%, the weight ratio of bentonite and hydrochloric acid solution was 1:2, the reaction temperature was 50 ℃ and time was 10 h. The activation degree of activated clay was 100 higher than traditional activated white clay, while the volume