高碱度烷基水杨酸钙碳酸化反应过程研究

利用常规分析、FE-EM(冷冻蚀刻电镜 )、FT-IR等分析手段研究了高碱度烷基水杨酸钙碳酸化反应过程。结果表明 ,随着碳酸化反应的进行 ,产品总碱值 (Total basic number,TBN)增加 ,胶体粒子尺寸也相应增大 ;当碱值降低时 ,胶体粒子尺寸也相应减小 ,产品粘度也不断下降。当反应进行到 74min时 ,产品的 TBN达到最高。同时 ,随着碳酸化反应的进行 ,产品中碳酸钙含量与产品 TBN表现出相同的变化趋势。当碳酸化反应过量进行到一定程度时 ,产品中出现方解石型碳酸钙。

STUDY OF CARBONATION PROCESS OF OVERBASED CALCIUM ALKYL SALICYLATE REACTION

The carbonation process of overbased calcium alkyl salicylate was investigated by using FE EM and FT IR methods.Results showed that the size of colloidal particles increased along with the increase of product TBN during the carbonation process,while the size of colloidal particles decreased when TBN began dropping.The product TBN showed its maximum at 74 min reaction time.It was also observed that calcium carbonate contents in the product showed the same tendecy of changes as the product TBN did,the calcite appeared at certain reaction extent.A deep realization on the carbonation is presented based on the above researches.