分散红54在超临界CO_2/乙醇中溶解度的测定与关联

Measurement and correlation of solubilities of C.I. Disperse Red 54 in supercritical carbon dioxide/ethanol

在超临界CO2染色体系中添加共溶剂可提高染料在超临界CO2中的溶解度,对提高超临界CO2染色速度或降低染色压力有重要意义.在343.2-383.2 K,10-26 MPa范围内,乙醇添加量为0%,1%,2%,3%的条件下,采用静态循环法测定了分散红54在超临界CO2及超临界CO2/乙醇中的溶解度.结果表明,在二元体系（分散红54＋CO2）和三元体系（分散红54＋乙醇＋CO2）中,分散红54的溶解度均随压力、温度的升高而增大,共溶剂乙醇的加入对分散红54在超临界CO2中的溶解度影响明显,增强因子为0.05-2.89.染料在二元和三元体系中的溶解度数据分别采用Chrastil和改进的Chrastil模型进行关联,结果较好.

The dye solubility is enhanced by adding a co-solvent into supercritical CO2 dyeing system,in which the dyeing speed is significantly improved or/and the pressure of supercritical CO2 dyeing is reduced.The solubilities of C.I.Disperse Red 54（DR54） in supercritical CO2 and supercritical CO2/ethanol were measured at temperatures from 343.2 to 383.2 K,pressures from 10 to 26 MPa,and at different content of ethanol（0%,1%,2%,3%）,respectively,using a static recirculation method.Under the entire experimental conditions in the binary system（DR 54＋CO2） and ternary system（DR 54＋ethanol＋CO2）,solubilities increased with rising temperature and pressure.Ethanol manifests its co-solvent effect on the dye solubility in supercritical CO2.The solubility enhancement was 0.05-2.89.The experimental solubilities of C.I.Disperse Red 54 in binary and ternary system were well correlated with the Chrastil model and modified Chrastil model,respectively.