石灰-苏打法生产商品级碳酸钙的实验室规模研究

Islam, A. Quader
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引用次数: 4

摘要

优质沉淀碳酸钙在各种化工及相关行业中作为填料、表面涂层、增白剂、粘合剂等用途有很大的需求。对经典石灰-苏打法进行了改进,得到了高质量的碳酸钙沉淀。实验分两个阶段进行,使用商业级和分析级碳酸钠和石灰作为反应物。苛化后,用碳酸钙洗涤滤液制备下一阶段反应的所有溶液。对该工艺生产的沉淀碳酸钙进行了分析,并与市售的碳化法生产的沉淀碳酸钙进行了比较。烧化法生产的碳酸钙优于国内用碳酸化法生产的碳酸钙。碳酸盐的晶体结构为方解石。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Laboratory Scale Production of Commercial Grade Calcium Carbonate from Lime-Soda Process
Quality precipitated calcium carbonate has much demand in various chemical and allied industries as filler, surface coating, whitening, adhesive etc. A study was carried out by modifying classical lime-soda process to obtain high quality precipitated calcium carbonate. The experiments were carried out in two stages using commercial and analytical grades of sodium carbonate and lime as reactants. After causticization, the filtrates from the washing of calcium carbonate were used to prepare all solutions for reactions in next stage. The precipitated calcium carbonate obtained from the process was analyzed and comparisons were made with the commercially available precipitated calcium carbonate produced from carbonation method. The calcium carbonate produced from causticization was superior to those produced by carbonation method in the country. The crystal structure of carbonate was calcite.
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