专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US4301125A Extraction of pre-reduced lateritic ores with aqueous sulphuric acid in the presence of peroxidant 失效
标题翻译：在过氧化物存在下用硫酸水溶液萃取预还原的红土矿石
公开(公告)号：US4301125A
公开(公告)日：1981-11-17
申请号：US60762
申请日：1979-07-26
申请人： Alfred R. Burkin , Andrew J. Monhemius
发明人： Alfred R. Burkin , Andrew J. Monhemius
IPC分类号： B01D11/02 , C22B3/00 , C22B23/00 , E21C20060101 , C22B23/04
CPC分类号： C22B23/043 , C22B23/0461
摘要： In a process according to the present invention pre-reduced lateritic ores containing iron and nickel are leached with an aqueous sulphuric acid leach liquor containing or into which is introduced in the presence of the ore a peroxidant selected from hydrogen peroxide and peroxymonosulphuric acid. By so doing, the liquor is obtained with a lower concentration of iron than if the peroxidant had not been employed.In preferred embodiments the leaching is carried out at from 40.degree. to 70.degree. C. for a period of 1 to 5 hours; when hydrogen peroxide is used, it is preferably introduced continuously or progressively throughout the reaction period and when peroxymonosulphuric acid is used it is preferably introduced initially. The acidity of the liquor can be reduced at the end of the reaction to pH3 to 4 to further lower the content of iron in solution.
摘要翻译：在根据本发明的方法中，含有铁和镍的预还原红土矿用含有硫酸浸出液浸出，所述硫酸浸出液在矿石存在下引入选自过氧化氢和过氧单硫酸的过氧化物。通过这样做，与未使用过氧化物相比，获得的铁浓度较低。在优选的实施方案中，浸出在40℃至70℃下进行1至5小时; 当使用过氧化氢时，优选在整个反应期间连续地或逐渐引入，并且当使用过氧单硫酸时，优选最初引入。在反应结束时，液体的酸度可以降低至pH3至4，以进一步降低溶液中铁的含量。

2. 发明授权

US4282189A Precipitation of metal values from organic media 失效
标题翻译：从有机介质中降低金属价值
公开(公告)号：US4282189A
公开(公告)日：1981-08-04
申请号：US119112
申请日：1980-02-06
申请人： Gunnar Thorsen , Andrew J. Monhemius
发明人： Gunnar Thorsen , Andrew J. Monhemius
IPC分类号： C22B3/00 , C01B13/32 , C01B13/36 , C01F7/34 , C01G1/02 , C01G3/00 , C01G3/02 , C01G9/00 , C01G23/00 , C01G49/00 , C01G49/02 , C01G51/00 , C01G53/00 , C22B3/20 , C22B3/26 , C22B3/32 , C22B3/44 , C01B13/18
CPC分类号： C22B3/44 , C22B3/0005 , C22B3/0024 , Y02P10/234 , Y10S423/14
摘要： Metal values, such as iron, may be stripped from an organic liquid medium loaded with metal ions by a process which comprises contacting the organic medium with an aqueous phase at a contact temperature which is sufficiently high to cause the metal values to precipitate as metal oxide, hydroxide or hydrate (or a mixture thereof) in the presence of the organic medium.
摘要翻译：可以通过包括使有机介质与水相接触的方法从负载有金属离子的有机液体介质中除去金属值，所述接触温度足够高以使金属值作为金属氧化物沉淀，氢氧化物或水合物（或其混合物）在有机介质的存在下进行。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式