The largest solvent-extraction plant in the world at the time, the Nchanga Copper Operation, was in Zambia. The first commercial process using solvent extraction for the refining of the platinum-group metals was in So...The largest solvent-extraction plant in the world at the time, the Nchanga Copper Operation, was in Zambia. The first commercial process using solvent extraction for the refining of the platinum-group metals was in South Africa. More recently, the Southern African region has seen the implementation of solvent extraction for other base metals, precious metals, and specialty metals. These include the world firsts of primary production of zinc at Skorpion Zinc in Namibia and the large-scale refining of gold by Harmony Gold in South Africa. Several other flowsheets that use solvent-extraction technology are currently under commissioning, development, or feasibility study for implementation in this part of the world, including those for the recovery of copper, cobalt, nickel, tantalum, and niobium.展开更多
通过选用7种不同的的阴离子、非离子以及两性表面活性剂分别对羽绒进行水洗,检测水洗烘干后羽绒的油脂含量、清洁度和蓬松度。试验结果表明,两性表面活性剂十二烷基甜菜碱(B S-12)脱脂效果最好,羽绒油脂去除率可达32.84%,阴离子型表面...通过选用7种不同的的阴离子、非离子以及两性表面活性剂分别对羽绒进行水洗,检测水洗烘干后羽绒的油脂含量、清洁度和蓬松度。试验结果表明,两性表面活性剂十二烷基甜菜碱(B S-12)脱脂效果最好,羽绒油脂去除率可达32.84%,阴离子型表面活性剂十二烷基苯磺酸(L A S H)脱脂效果最差,羽绒油脂去除率只有15.03%,阴离子表面活性剂脂肪酸甲酯磺酸钠(M E S)油脂去除率为23.56%,但脱脂后的清洁度与蓬松度都较高,气味等级可以从最差的3级提高到最好的0级,综合蓬松度、清洁度、气味等级以及经济效益考虑,阴离子型表面活性剂M E S各项指标均较好。展开更多
文摘The largest solvent-extraction plant in the world at the time, the Nchanga Copper Operation, was in Zambia. The first commercial process using solvent extraction for the refining of the platinum-group metals was in South Africa. More recently, the Southern African region has seen the implementation of solvent extraction for other base metals, precious metals, and specialty metals. These include the world firsts of primary production of zinc at Skorpion Zinc in Namibia and the large-scale refining of gold by Harmony Gold in South Africa. Several other flowsheets that use solvent-extraction technology are currently under commissioning, development, or feasibility study for implementation in this part of the world, including those for the recovery of copper, cobalt, nickel, tantalum, and niobium.
文摘通过选用7种不同的的阴离子、非离子以及两性表面活性剂分别对羽绒进行水洗,检测水洗烘干后羽绒的油脂含量、清洁度和蓬松度。试验结果表明,两性表面活性剂十二烷基甜菜碱(B S-12)脱脂效果最好,羽绒油脂去除率可达32.84%,阴离子型表面活性剂十二烷基苯磺酸(L A S H)脱脂效果最差,羽绒油脂去除率只有15.03%,阴离子表面活性剂脂肪酸甲酯磺酸钠(M E S)油脂去除率为23.56%,但脱脂后的清洁度与蓬松度都较高,气味等级可以从最差的3级提高到最好的0级,综合蓬松度、清洁度、气味等级以及经济效益考虑,阴离子型表面活性剂M E S各项指标均较好。
