In this paper the research results on the preparation of ferri-magnetofluids through colloid chemical methods developed in China are in-troduced , and the applications of the resulted fluids in mineral separations are...In this paper the research results on the preparation of ferri-magnetofluids through colloid chemical methods developed in China are in-troduced , and the applications of the resulted fluids in mineral separations are described. The colloid chemical method includes the procedure of oxi-dation-hydrolysis-collection-dispersion. It is shown that by adding NaOH to an FeSO4 ?7H2O aqueous solution, followed by aeration, an oxidation-hydrolysis reaction occurs which produces ultrafine Fe3O4 particles. The particles may then be collected by sodium oleate into kerosene phase and thus forming stable oil-base ferrimagnetofluid, or, alternately, the parti-cles may be coated with sodium oleate first, then flocculated by adding HC1, follmved by redispersion in water by adding sodium dodecyl benzen-sulphonate, to form a water-base ferrimagnetofluid. The above ferrimag-netofluids have been used as separation media in the separation of arsenopy-rite from galena, and in the separation of gold from hard- rock gold ores. The results show that the ferrimagnetofluids are better than paramag-netofluids.展开更多
介绍了中国石油化工股份有限公司金陵分公司0.6 M t/a对二甲苯装置的设计情况。歧化单元采用国产HAT-096型甲苯歧化与烷基化催化剂,吸附分离单元采用PAREX工艺,异构化单元采用SK I-400异构化催化剂;主要设备采用国外引进内件,国内生产...介绍了中国石油化工股份有限公司金陵分公司0.6 M t/a对二甲苯装置的设计情况。歧化单元采用国产HAT-096型甲苯歧化与烷基化催化剂,吸附分离单元采用PAREX工艺,异构化单元采用SK I-400异构化催化剂;主要设备采用国外引进内件,国内生产壳体的方案;采用加热炉对流段的热联合、单元内设备间的热联合、重沸炉集中供热、高温位热充分利用等节能措施。装置运行表明,达到了设计目标。展开更多
文摘In this paper the research results on the preparation of ferri-magnetofluids through colloid chemical methods developed in China are in-troduced , and the applications of the resulted fluids in mineral separations are described. The colloid chemical method includes the procedure of oxi-dation-hydrolysis-collection-dispersion. It is shown that by adding NaOH to an FeSO4 ?7H2O aqueous solution, followed by aeration, an oxidation-hydrolysis reaction occurs which produces ultrafine Fe3O4 particles. The particles may then be collected by sodium oleate into kerosene phase and thus forming stable oil-base ferrimagnetofluid, or, alternately, the parti-cles may be coated with sodium oleate first, then flocculated by adding HC1, follmved by redispersion in water by adding sodium dodecyl benzen-sulphonate, to form a water-base ferrimagnetofluid. The above ferrimag-netofluids have been used as separation media in the separation of arsenopy-rite from galena, and in the separation of gold from hard- rock gold ores. The results show that the ferrimagnetofluids are better than paramag-netofluids.
文摘介绍了中国石油化工股份有限公司金陵分公司0.6 M t/a对二甲苯装置的设计情况。歧化单元采用国产HAT-096型甲苯歧化与烷基化催化剂,吸附分离单元采用PAREX工艺,异构化单元采用SK I-400异构化催化剂;主要设备采用国外引进内件,国内生产壳体的方案;采用加热炉对流段的热联合、单元内设备间的热联合、重沸炉集中供热、高温位热充分利用等节能措施。装置运行表明,达到了设计目标。