【摘要】 确定十三碳二元酸 (DCAB)在有机溶剂重结晶过程中最佳操作条件和设计工业结晶器。测定其溶解度和介稳区宽度等参数。利用 Tyndall效应测定了 DCAB在乙酸丁酯中的溶解度相图 ,并研究了烷烃和正丁醇对 DCAB在乙酸丁酯中溶解度的影响。实验结果表明 ,烷烃使 DCAB在乙酸丁酯中的溶解度下降 ,正丁醇使 DCAB的溶解度增加。在给定溶剂体系中 ,DCAB的溶解度 s与温度 T之间存在关系 :ln s=0 .0 889T/ K- 2 7.90 3。DCAB在乙酸丁酯中冷却速率Δ Tmax与介稳区宽度 b之间呈关系 :ln [b/ (K .h- 1 ) ]=0 .5 6 4ln(ΔΤmax/ K) - 0 .0 6 6。介稳区宽度随冷却速率的增加而增加。更多还原

【Abstract】 The solubility and the metastable zone widths of 1,13 tridecanedioic acid in organic solvent are the basis for the design of a crystallizer and its optimal operating conditions. The solubility curve of l,13 tridecanedioic acid was measured experimentally and the influence of paraffin and butanol on the solubility was studied using the Tyndall effect. The results showed that paraffin reduced the acid solubility, but butanol increased it. The solubility ( s ) was linearly related to the system temperature, ln s = 0.0889 T /K -27.903. The metastable zone width was exponentially related to the cooling rate, ln[ b /(K·h -1 )]= 0.564 ln(Δ Τ max /K) - 0.066 , which shows that the metastable zone width increased with increasing cooling rate.更多还原