以煤矸石为铝源制备镁铝层状双金属氢氧化物

硅酸盐通报 ›› 2017, Vol. 36 ›› Issue (3): 833-838.

以煤矸石为铝源制备镁铝层状双金属氢氧化物

秦华;马晓燕;徐岩;付佳琳

黑龙江科技大学环境与化工学院,哈尔滨,150022

出版日期:2017-03-15 发布日期:2021-01-18
基金资助:
黑龙江省教育厅科学技术研究项目(12521463)

Preparation of Mgnesia-Alumina Double-layered Metal Hydroxides with Coal Gangue as Aluminum Source

QIN Hua;MA Xiao-yan;XU Yan;FU Jia-lin

Online:2017-03-15 Published:2021-01-18

摘要/Abstract

摘要： 以煤矸石为铝源,经机械活化、热活化、酸浸提、制备了一水软铝石,再通过共沉淀法合成Mg-Al层状双金属氢氧化物.采用XRD、FT-IR和SEM等手段对合成样品进行分析和表征.结果表明:煤矸石在热活化温度为700 ℃、浸取温度为100 ℃、浸取时间为150 min、助溶剂/样品质量比为2∶10、硫酸浓度为4 mol/L、液固比为15∶1时,Al2O3浸取率为0.937.共沉淀法制备Mg-Al层状双金属氢氧化物在Mg与Al物质的量比为2∶1,pH值为10,反应温度为60 ℃时,得到层间距d(003)为0.798 nm的镁铝层状双金属氢氧化物.

关键词: 煤矸石;一水软铝石;层状双金属氢氧化物;共沉淀法

Abstract: Obtained from coal gangue as raw matcrials of boehmite was through mechanical activation, thermal activation and acid extraction.Mg-Al layered double metal hydroxides(LDHs) was produced by co-precipitation method.The products were characterized by XRD,IR and scanning electron microscopy (SEM) measurements.Experimental results show that: Coal gangue is activated at the calcination temperature of 700 ℃, leaching temperature is 100 ℃, extraction time is 150 min,the quality ratio between solvent and sample is 2∶10,the concentration of sulfuric acid is 4 mol/L,the ratio between liquid and solid is 15∶1,the extraction rate of Al2O3 is 0.937.When the molar ratio of Mg and Al is 2∶1,pH is 10 and the reaction temperature is 60 ℃,Mg-Al layered double hydroxides with interlamellar spacing d(003) of 0.798 nm are prepared by co-precipitation method.

Key words: coal gangue;boehmite;layered double metal hydroxides(LDHs);co-precipitation

中图分类号:

秦华;马晓燕;徐岩;付佳琳. 以煤矸石为铝源制备镁铝层状双金属氢氧化物[J]. 硅酸盐通报, 2017, 36(3): 833-838.

QIN Hua;MA Xiao-yan;XU Yan;FU Jia-lin. Preparation of Mgnesia-Alumina Double-layered Metal Hydroxides with Coal Gangue as Aluminum Source[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2017, 36(3): 833-838.