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膨润土常压低温焙烧法制备活性白土及其性能
作者:杨梦娜1 2 孙红娟1 2 彭同江1 2 解颜岩1 2 
单位:(1. 西南科技大学 固体废物资源化教育部重点实验室 四川 绵阳 621010  2. 西南科技大学矿物材料及应用研究所 四川 绵阳 621010) 
关键词:膨润土 低温焙烧法 常压 浓硫酸 活性白土 
分类号:TD985
出版年,卷(期):页码:2019,47(4):0-0
DOI:
摘要:

 以江西某地钙基膨润土为原料,浓硫酸为活化助剂,常压下低温焙烧活化制备高效活性白土,通过X射线衍射、紫外-可见吸收光谱等分析手段考察了不同浓硫酸/膨润土质量比、焙烧温度及焙烧时间对活化产物物相结构、脱色率及活性度的影响。结果表明:常压低温焙烧法中焙烧温度是影响活性白土性能的首要因素;在优化条件为浓硫酸/膨润土质量比25%、焙烧温度200 ℃,焙烧时间40 min时,制备得到的活性白土脱色率为99.22%,活性度为232 mmol/kg,游离酸含量为0.19%,其他性能也均满足我国行业标准各类型活性白土一等品要求。

 Activated clay was prepared via low-temperature calcination at atmospheric pressure with Ca-bentonite as a raw material and sulfuric acid as an activator. The influences of mass ratio of sulfuric acid/bentonite, calcination temperature and calcination time on the phase structure, decolorization rate and activity of the activated products were investigated by X-ray diffraction, ultraviolet-visible adsorption spectroscopy and other analytical methods. The results show that the calcination temperature is a dominant factor affecting the performance of activated clay in this method. An activated clay with the decolorization rate of 99.22%, the activity degree of 232 mmol/kg and the free acid content of 0.19% can be obtained under the optimized conditions (i.e., mass ratio of sulfuric acid/bentonite of 25%, calcination temperature of 200 ℃, and calcination time of 40 min). Besides, this activated clay can be used as a first-class activated clay to meet the industrial requirements.

基金项目:
西南科技大学龙山创新团队支持项目(17LZXT11);西南科技大学研究生创新基金资助项目(18ycx038)。
作者简介:
参考文献:

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