溶剂气浮法分离机理的基础研究

研究了待分离物呈表面活性物系（甲基橙－十六烷基氯化吡啶、十六烷基氯化吡啶）和呈疏水性物系（铜－二乙基二硫代氨基甲酸钠、镍－丁二酮肟）的溶剂气浮变化规律．红外光谱分析表明，分离效率的高低与有机相和气浮分离物相互作用的强弱不相关．在所研究的溶剂气浮体系中，气泡吸附单元是决定分离效率的关键．总的溶剂气浮过程满足一级动力学方程，其过程的表观活化能可作为衡量溶剂气浮过程分离效率的特征参数．表观活化能取决于待分离物质的表面活性，可借用疏水平衡值ＨＬＰ来反映．表观活化能愈小，其待分离物质的表面活性愈高（ＨＬＰ值愈小），而气泡吸附量和分离效率则增加

A Study on Separation Mechanism of Solvent Sublation

Twe types of sublates, surface active substance(MO HPC,HPC)and hydrophobic substances(Cu DDTC,Ni BDODO) as the objects of the solvent sublation (SS) were studied. The IR data showed that the separation efficiency of the SS was independent of the interreaction between sublate and organic solvent. The bubble absorption of the SS was the key to the separation efficiency. The SS processes of the sublates was obedience to first order kinetics. A new characteristic parameter, apparent activation energy of attachment of the sublate to bubble, had been proposed to describe the separation efficiency of the solvent sublation. The value of E f depended on the surface activity of the sublate so that the HLB value of the sublate was used for the indication of E f. Lower HLB value corresponded to higher surface activity and lower E f, as well as larger bubble adsorption capacity and higher separation efficiency.