煤系高岭土酸浸脱铝水热合成NaX分子筛  

Hydrothermal Synthesis of NaX Molecular Sieves from Coal-series Kaolin by Leaching Dealuminization

作　　者：孔德顺[1] 连明磊[1] 范佳鑫[1] 李琳[1] 

机构地区：[1]六盘水师范学院化学与化工系,贵州六盘水553004

出　　处：《非金属矿》2013年第5期14-16,共3页Non-Metallic Mines

基　　金：六盘水市煤系固体废弃物资源化利用创新团队资助(52020-2012-04-01-02);贵州省煤炭资源清洁高效利用科研实验平台资助(黔科平台[2011]4003);煤系固体废弃物资源化利用实验室资助(黔教高发2011-278)

摘　　要：将煤系高岭土在750℃下煅烧2 h,使其转变为偏高岭土,加入过量10%质量分数为20%的盐酸在90℃下酸浸2 h,氧化铝溶出率达到72.6%;合成NaX分子筛的体系组成是:n(SiO2)/n(Al2O3)为3.0、n(Na2O)/n(SiO2)为1.9、n(H2O)/n(Na2O)为40,室温老化24 h后,加入理论产量10%的NaX分子筛原粉作为晶种,在95℃水热条件下晶化9 h,得到晶化产物,产物为较纯净的NaX分子筛。The coal series kaolin was turned into metakaolin by calcination at 750 ℃ for 2 h, then the hydrochloric acid whose concentration was 20% was added into the metakaolin overdose in 10% and leached at 90 ℃ for 2 h, the alumina leaching ratio was 72.6%; then the synthesis system of NaX molecular sieves was that n（SiO2）/n（Al203） being 3.0, n（Na20）/n（Si02） being 1.9 and n（H20）/n（Na20） being 40, aging at room temperature for 24 h, adding 10% NaX molecular sieve raw powder of theoretical output as seeds, crystallization by hydrothermal method at 95℃for 9 h, the products were purer NaX molecular sieves.

关 键 词：煤系高岭土 酸浸 水热合成 NaX分子筛 

分 类 号：TQ424.25[化学工程] TD985[矿业工程—选矿]