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采用山梨酸和碳酸钠固相反应生产山梨酸钠过程中,会出现反应体系温度突然升高,反应物粘接,反应不易进行彻底,碱的加入量超过化学反应比例等问题,从而影响反应的进行和产品质量。为解决这些问题,利用X-射线衍射、扫描电镜、差热及热重分析方法,对其固相反应过程的微观变化特征进行研究,结果表明:山梨酸与碳酸钠固相反应产生的热、水及研磨力是固相反应进行的内在动力,山梨酸晶体崩解是反应体系温度快速升高最重要的原因;中和反应生成的水会使物料之间产生粘接,在其后有一部分成为山梨酸钠的结晶水;碳酸钠在反应过程生成碳酸氢钠是影响碱超标、反应不易进行彻底等问题的最直接原因。
The use of sorbic acid and sodium carbonate solid-phase reaction of sodium sorbate production process, there will be a sudden rise in temperature of the reaction system, reactants bonding, the reaction is not easy to complete, the amount of alkali than the chemical reaction ratio and other issues, which affect the reaction Conduct and product quality. In order to solve these problems, the microscopic characteristics of the solid phase reaction process were investigated by X-ray diffraction, scanning electron microscopy, differential thermal analysis and thermogravimetric analysis. The results showed that the heat generated by the solid phase reaction of sorbic acid and sodium carbonate, Water and grinding power is the internal driving force of the solid-phase reaction. The disintegration of the crystals of sorbic acid is the most important reason for the rapid temperature rise of the reaction system. The water produced by the neutralization reaction will cause the materials to stick together, Become sodium sorbate crystal water; Sodium carbonate in the reaction process to produce sodium bicarbonate is the impact of excessive alkali, the reaction is not easy to carry out the most direct and other issues.