硅酸盐通报2017，Vol.36Issue(1)：43-50,56,9.
CO2碳化法制备微米级球霰石型食品碳酸钙的研究
Preparation of Micro-size Food-grade Vaterite CaCO3 by CO2 Carbonization Method
摘要
Abstract
Micron-size food-grade vaterite CaCO3 were prepared by CO2 carbonization method. The effects of temperature, Ca2+ concentration and CO2 proportion in gas mixture on the morphology and polymorph of the CaCO3 crystals and influences of ammonia amount and carbonization time on the yield of CaCO3 were investigated. The microstructures and morphology of the prepared samples were systematically investigated by FT-IR, XRD and SEM. The crystal of prepared CaCO3 changed from vaterite to calcite with increasing carbonization temperature and decreasing the proportion of CO2 in gas mixture. The particle size of CaCO3 increased with increasing the concentration of Ca2+. The yield of the prepared CaCO3 increased and then decreased with prolonging the carbonization time. The average size of the prepared CaCO3 particles was 3. 79 μm with uniform particle distribution and the yield was higher than 99% at the carbonization temperature of 20 ℃, Ca2+ concentration of 0. 3 mol/L, CO2 proportion in gas mixture of 30%, [ammonia]/2[Ca2+] of 1. 1, the carbonization time of 24 min. Heavy metal content was lower than the limits of national standard "Food additive GB1898-2007 light calcium carbonate additive".关键词
CO2 碳化法/食品碳酸钙/微米级/球霰石型Key words
CO2 carbonization method/food-grade CaCO3/micron-size/vaterite分类
化学化工引用本文复制引用
王芬,余军霞,肖春桥,张锦,余丽霞,周芳,池汝安..CO2碳化法制备微米级球霰石型食品碳酸钙的研究[J].硅酸盐通报,2017,36(1):43-50,56,9.基金项目
教育部长江学者和创新团队发展计划(IRT0974) （IRT0974）
