Extraction kinetics of phenol with N,N-di(1-methyl-heptyl) acetamide-kerosene using hollow fiber membrane extractor has been studied. The rate regularities and kinetic types of forward and backward extraction were obt...Extraction kinetics of phenol with N,N-di(1-methyl-heptyl) acetamide-kerosene using hollow fiber membrane extractor has been studied. The rate regularities and kinetic types of forward and backward extraction were obtained respectively by determining the forward and backward extraction rate under various experimental conditions. The mass transfer mechanism was discussed. Both the forward and backward extraction of phenol might be controlled by diffusion processes, and the diffusion resistance for both forward and backward extraction mainly exists in aqueous phase. In addition, ways to optimize the extraction process of phenol were discussed as well.展开更多
生产实践表明,短绒率对羊绒纱线强力和成纱质量影响很大,而复精梳隔距大小会严重影响纤维短绒率的含量。选取28、30、32 mm 3种复精梳拔取隔距,分别纺制出11.11、10.00 tex 2种线密度单纱,并对不同复精梳拔取隔距下羊绒条的短绒率、平...生产实践表明,短绒率对羊绒纱线强力和成纱质量影响很大,而复精梳隔距大小会严重影响纤维短绒率的含量。选取28、30、32 mm 3种复精梳拔取隔距,分别纺制出11.11、10.00 tex 2种线密度单纱,并对不同复精梳拔取隔距下羊绒条的短绒率、平均手排长度以及纱线力学性能进行测试。对测试结果进行分析后得出复精梳拔取隔距与羊绒绒条短绒率、羊绒纤维平均手排长度、精纺羊绒纱线断裂强力、断裂伸长之间的影响规律,为实际生产中提高复精梳羊绒纱线及其织物质量提供了参考。展开更多
The aim of this study was to compare two different instrumental methods for determination of fat content in washed cashmere. The fat content in washed cashmere was determined using Soxhlet fat extraction unit and fibe...The aim of this study was to compare two different instrumental methods for determination of fat content in washed cashmere. The fat content in washed cashmere was determined using Soxhlet fat extraction unit and fiber grease extractor quickly, respectively. The results show that no significant difference was found between these two instrumental methods, and reliability of fiber grease extractor quickly was confirmed for deter- mination of fat content in washed cashmere. Therefore, the fiber grease extractor quickly can meet current standard for determination of fat content in washed cashmere.展开更多
文摘Extraction kinetics of phenol with N,N-di(1-methyl-heptyl) acetamide-kerosene using hollow fiber membrane extractor has been studied. The rate regularities and kinetic types of forward and backward extraction were obtained respectively by determining the forward and backward extraction rate under various experimental conditions. The mass transfer mechanism was discussed. Both the forward and backward extraction of phenol might be controlled by diffusion processes, and the diffusion resistance for both forward and backward extraction mainly exists in aqueous phase. In addition, ways to optimize the extraction process of phenol were discussed as well.
文摘生产实践表明,短绒率对羊绒纱线强力和成纱质量影响很大,而复精梳隔距大小会严重影响纤维短绒率的含量。选取28、30、32 mm 3种复精梳拔取隔距,分别纺制出11.11、10.00 tex 2种线密度单纱,并对不同复精梳拔取隔距下羊绒条的短绒率、平均手排长度以及纱线力学性能进行测试。对测试结果进行分析后得出复精梳拔取隔距与羊绒绒条短绒率、羊绒纤维平均手排长度、精纺羊绒纱线断裂强力、断裂伸长之间的影响规律,为实际生产中提高复精梳羊绒纱线及其织物质量提供了参考。
基金supported by grants from the Gansu Agricul-tural Bio-technology Research & Development Project
文摘The aim of this study was to compare two different instrumental methods for determination of fat content in washed cashmere. The fat content in washed cashmere was determined using Soxhlet fat extraction unit and fiber grease extractor quickly, respectively. The results show that no significant difference was found between these two instrumental methods, and reliability of fiber grease extractor quickly was confirmed for deter- mination of fat content in washed cashmere. Therefore, the fiber grease extractor quickly can meet current standard for determination of fat content in washed cashmere.
