公开(公告)号：US20100154593A1

公开(公告)日：2010-06-24

申请号：US12438418

申请日：2007-08-22

申请人： Ivan Ratchev ,  Houyuan Liu ,  Alexey Duarte ,  Harald Theowald Muller

发明人： Ivan Ratchev ,  Houyuan Liu ,  Alexey Duarte ,  Harald Theowald Muller

IPC分类号： C22B23/00 ,  C22B9/16 ,  C22B1/00

CPC分类号： C22B23/043 ,  C22B3/42 ,  C22B23/0461 ,  C22B23/0484 ,  Y02P10/234

摘要： A process for producing a metallic nickel product with a low iron content, including the steps of: (i) providing an acidic product liquor containing at least nickel and iron; (ii) subjecting said acidic product liquor to an ion exchange process wherein an ion exchange resin selectively absorbs said nickel and part of the iron from said product liquor; (iii) eluting the nickel and iron from said resin with an acidic solution to produce an eluate containing said nickel and iron. (iv) neutralising said eluate to a pH value in the range from 2.5 to 3.5 to cause precipitation of a substantial amount of said iron, leaving an iron depleted eluate; (v) neutralising the iron depleted eluate to a pH value in the range from 7 to 8 to cause precipitation of nickel hydroxide containing low iron; (vi) calcining said nickel hydroxide to convert it to nickel oxide; (vii) subjecting said nickel oxide to direct smelting in the presence of a reductant to produced a molten nickel phase; and (viii) refining said molten nickel phase by oxidation to produce a metallic nickel product with low iron content.

摘要翻译： 一种制备铁含量低的金属镍产品的方法，包括以下步骤：（i）提供至少含有镍和铁的酸性产物液; （ii）使所述酸性产物液体进行离子交换过程，其中离子交换树脂从所述产物液体中选择性地吸收所述镍和部分铁; （iii）用酸性溶液从所述树脂中洗脱镍和铁，以产生含有所述镍和铁的洗脱液。 （iv）将所述洗脱液中和到2.5至3.5的pH值以引起大量所述铁沉淀，留下铁耗尽的洗脱液; （v）将贫铁洗脱液中和至pH7至8，使含有低铁的氢氧化镍沉淀; （vi）煅烧所述氢氧化镍以将其转化为氧化镍; （vii）使所述镍氧化物在还原剂存在下直接熔炼以产生熔融镍相; 和（viii）通过氧化来精炼所述熔融镍相以产生具有低铁含量的金属镍产品。

公开(公告)号：US20080110764A1

公开(公告)日：2008-05-15

申请号：US11924808

申请日：2007-10-26

申请人： Lazar Strezov ,  Ivan Ratchev ,  Steve Osborn

发明人： Lazar Strezov ,  Ivan Ratchev ,  Steve Osborn

IPC分类号： C25C3/00

CPC分类号： C25C3/06 ,  C25C3/00 ,  C25C3/04

摘要： A method of electrolytically reducing a metal oxide (such as aluminium and magnesium oxides) to produce a metal in an electrolytic call is disclosed. The method includes electrolytically reducing the metal oxide in an electrolytic cell that includes a pool of molten metal, the metal being the metal of the metal oxide to be reduced, and the molten metal pool forming a cathode of the cell. The electrolytic cell also includes a pool of molten electrolyte in contact with the molten metal, the electrolyte containing alkali and/or alkaline earth halides. The electrolytic cell also includes an anode extending into the electrolyte and a body of metal oxide to reduced in contact with the molten metal and the electrolyte.

摘要翻译： 公开了一种电解还原金属氧化物（例如铝和氧化镁）以产生电解质中的金属的方法。 该方法包括电解还原电解池中的金属氧化物，其包括熔融金属池，该金属是要还原的金属氧化物的金属，以及形成电池阴极的熔融金属池。 电解池还包括与熔融金属接触的熔融电解液池，电解液含有碱金属和/或碱土金属卤化物。 电解池还包括延伸到电解质中的阳极和金属氧化物体，以减少与熔融金属和电解质的接触。

公开(公告)号：US20080016986A1

公开(公告)日：2008-01-24

申请号：US11687256

申请日：2007-03-16

申请人： Houyuan Liu ,  Alexey Duarte ,  Wolf Meihack ,  Ivan Ratchev

发明人： Houyuan Liu ,  Alexey Duarte ,  Wolf Meihack ,  Ivan Ratchev

IPC分类号： C22B3/42 ,  C22B23/00 ,  C22B9/02 ,  C22B3/00

CPC分类号： C22B23/021 ,  C22B3/42 ,  C22B3/44 ,  C22B5/10 ,  C22B23/043 ,  C22B23/0453 ,  C22B23/0461 ,  C22B23/0476 ,  C22B23/06 ,  Y02P10/216 ,  Y02P10/234

摘要： A process for the production of ferro-nickel or nickel matte from a product liquor solution containing at least nickel, cobalt, iron and acid soluble impurities, said process including the steps of: (a) contacting the product liquor solution (7) containing the nickel, cobalt, iron and acid soluble impurities with an ion exchange resin (8), wherein the resin selectively absorbs nickel and iron from the solution leaving the cobalt and the acid soluble impurities in the raffinate (9); (b) stripping the nickel and iron from the resin with a sulfuric acid solution to produce an eluate (11) containing nickel and iron; (c) neutralising the eluate to precipitate a mixed nickel iron hydroxide product (13); and (d) reducing and smelting the mixed nickel iron hydroxide product to produce ferro-nickel (29) or nickel matte (24).

摘要翻译： 从含有至少镍，钴，铁和酸可溶性杂质的产品液体溶液中生产铁镍或镍锍的方法，所述方法包括以下步骤：（a）使含有 镍，钴，铁和酸可溶性杂质与离子交换树脂（8）反应，其中树脂选择性地从溶液中吸收镍和铁，留下残留钴中的酸和可溶性杂质（9）; （b）用硫酸溶液从树脂中剥离镍和铁以制备含有镍和铁的洗脱液（11）; （c）中和洗脱液以沉淀混合的氢氧化镍氢氧化物产物（13）; 和（d）还原和熔炼混合的氢氧化镍氢氧化物产物以产生铁镍（29）或镍锍（24）。

公开(公告)号：US20070181436A1

公开(公告)日：2007-08-09

申请号：US11616419

申请日：2006-12-27

申请人： Kannapar Mukunthan ,  Ivan Ratchev ,  Andrew Shook

发明人： Kannapar Mukunthan ,  Ivan Ratchev ,  Andrew Shook

IPC分类号： C25C3/28

CPC分类号： C25C3/28 ,  B22F2998/00 ,  C22B1/2406 ,  C22B34/129 ,  C25C5/04 ,  B22F3/02 ,  B22F3/10 ,  B22F3/18

摘要： A method of producing titanium semi-finished or ready-to-use products from titanium oxide powders and/or pellets is disclosed. The method produces products that are not affected adversely by levels of chlorine that have an impact on performance, particularly weldability, of products made by other methods.

摘要翻译： 公开了一种从氧化钛粉末和/或丸粒生产钛半成品或即用型产品的方法。 该方法生产的产品不会受到其他方法制成的产品对性能，特别是可焊性影响的氯含量的不利影响。

公开(公告)号：US07208075B2

公开(公告)日：2007-04-24

申请号：US10637548

申请日：2003-08-11

申请人： Lazar Strezov ,  Ivan Ratchev ,  Steve Osborn

发明人： Lazar Strezov ,  Ivan Ratchev ,  Steve Osborn

IPC分类号： C25C3/28

CPC分类号： C25C7/005 ,  C22B5/02 ,  C22B34/129 ,  C25C3/00 ,  C25C3/28

摘要： A method of reducing a metal oxide in a solid state, in an electrolytic cell, is provided, as is an electrolytic cell suitable for performing the method. The cathode of the electrolytic cell is formed at least in part from the metal oxide to be reduced, and the electrolyte includes cations of a metal that is capable of chemically reducing the cathode metal oxide. The method includes operating the cell at a potential that is above the potential at which cations of the reducing metal will deposit as metal on the cathode.

摘要翻译： 提供了一种在电解槽中还原固态的金属氧化物的方法，适用于执行该方法的电解槽也是如此。 电解槽的阴极至少部分地从要还原的金属氧化物形成，并且电解质包括能够化学还原阴极金属氧化物的金属的阳离子。 该方法包括以高于还原金属的阳离子在阴极上作为金属沉积的电位的电位操作电池。

公开(公告)号：US20060226027A1

公开(公告)日：2006-10-12

申请号：US10561597

申请日：2004-06-21

申请人： Andrew Shook ,  Gregory Ridby ,  Ivan Ratchev

发明人： Andrew Shook ,  Gregory Ridby ,  Ivan Ratchev

IPC分类号： C25F1/00 ,  C25C3/08

CPC分类号： C25C7/007 ,  C22B1/2406 ,  C22B5/02 ,  C22B34/129 ,  C25C3/28 ,  C25C5/04 ,  C25C7/025

摘要： An electrolytic cell for electrochemically reducing metal oxide powders and/or pellets is disclosed. The cell includes a cathode (25) in the form of a plate that has an upper surface for supporting metal oxide powders and/or pellets. The plate is horizontally disposed or slightly inclined and has a forward end and a rearward end and is immersed in an electrolyte bath. The plate is supported for movement so as to cause metal oxide powders and/or pellets on the upper surface of the plate to move toward a forward end of the plate. The cell also includes a means for causing metal oxide powders and/or pellets to move over the upper surface of the plate toward the forward end of the cathode while in contact with molten electrolyte whereby electrochemical reduction of the metal oxide to metal can occur. A method of continuously or semi-continuously reducing metal oxide powders and/or pellets in the cell is also disclosed.

摘要翻译： 公开了用于电化学还原金属氧化物粉末和/或丸粒的电解池。 电池包括板形式的阴极（25），其具有用于支撑金属氧化物粉末和/或颗粒的上表面。 该板水平放置或稍微倾斜，并具有前端和后端，并浸入电解液浴中。 支撑板移动，以使板的上表面上的金属氧化物粉末和/或颗粒向板的前端移动。 电池还包括使金属氧化物粉末和/或丸粒在与熔融电解液接触的同时朝向阴极的前端移动到板的上表面上的装置，由此可以发生金属氧化物到金属的电化学还原。 还公开了在电池中连续或半连续还原金属氧化物粉末和/或丸粒的方法。

公开(公告)号：US20050092129A1

公开(公告)日：2005-05-05

申请号：US10939001

申请日：2004-09-10

申请人： Les Strezov ,  Ivan Ratchev ,  Steve Osborn ,  Sergey Bliznyukov

发明人： Les Strezov ,  Ivan Ratchev ,  Steve Osborn ,  Sergey Bliznyukov

IPC分类号： C25C1/22 ,  C22B9/14 ,  C22B34/12 ,  C25C5/00 ,  C25C7/00 ,  C25C7/02 ,  C25C7/04 ,  C25C3/28

CPC分类号： C25C7/005 ,  C22B34/129

摘要： An electrolytic cell for reducing a metal oxide, such as titania, in a solid state is disclosed. The electrolytic cell includes an anode formed from carbon and a cathode formed at least in part from the metal oxide. The electrolytic cell also includes a membrane that is permeable to oxygen anions and is impermeable to carbon in ionic and non-ionic forms positioned between the cathode and the anode to thereby prevent migration of carbon to the cathode.

摘要翻译： 公开了一种用于还原金属氧化物如二氧化钛的固体电解池。 所述电解槽包括由至少部分由所述金属氧化物形成的碳和阴极形成的阳极。 该电解池还包括一氧化硅阴离子渗透的膜，并且位于阴极和阳极之间的离子和非离子形式的碳是不渗透的，从而防止碳向阴极迁移。

公开(公告)号：US20110120881A1

公开(公告)日：2011-05-26

申请号：US12961068

申请日：2010-12-06

申请人： LES STREZOV ,  Ivan Ratchev ,  Steve Osborn

发明人： LES STREZOV ,  Ivan Ratchev ,  Steve Osborn

IPC分类号： C25C1/00

CPC分类号： C22B5/00 ,  C22B34/129

摘要： A method of reducing a titanium oxide in a solid state in an electrolytic cell which includes an anode, a cathode formed at least in part from the titanium oxide, and a molten electrolyte which includes cations of a metal that is capable of chemically reducing the cathode titanium oxide, which method includes operating the cell at a potential that is above a potential at which cations of the metal that is capable of chemically reducing the cathode titanium oxide deposit as the metal on the cathode, whereby the metal chemically reduces the cathode titanium oxide, and which method is characterised by refreshing the electrolyte and/or changing the cell potential in later stages of the operation of the cell as required having regard to the reactions occurring in the cell and the concentration of oxygen in the titanium oxide in the cell in order to produce high purity titanium.

摘要翻译： 一种在电解槽中还原固体状态的氧化钛的方法，该方法包括阳极，至少部分由氧化钛形成的阴极，以及包含能够化学还原阴极的金属阳离子的熔融电解质 氧化钛，该方法包括以高于能够化学还原阴极氧化钛的金属的阳离子作为阴极上的金属沉积的电位的电位操作电池，由此金属化学还原阴极氧化钛 并且该方法的特征在于，考虑到细胞中发生的反应和细胞中的氧化钛中的氧浓度，根据需要刷新电解质的后期阶段和/或改变细胞电位 以生产高纯钛。

公开(公告)号：US07918985B2

公开(公告)日：2011-04-05

申请号：US10482055

申请日：2002-06-28

申请人： Les Strezov ,  Ivan Ratchev ,  Steve Osborn

发明人： Les Strezov ,  Ivan Ratchev ,  Steve Osborn

IPC分类号： C25C3/28

CPC分类号： C22B5/00 ,  C22B34/129

摘要： A method of reducing a titanium oxide in a solid state in an electrolytic cell which includes an anode, a cathode formed at least in part from the titanium oxide, and a molten electrolyte which includes cations of a metal that is capable of chemically reducing the cathode titanium oxide, which method includes operating the cell at a potential that is above a potential at which cations of the metal that is capable of chemically reducing the cathode titanium oxide deposit as the metal on the cathode, whereby the metal chemically reduces the cathode titanium oxide, and which method is characterized by refreshing the electrolyte and/or changing the cell potential in later stages of the operation of the cell as required having regard to the reactions occurring in the cell and the concentration of oxygen in the titanium oxide in the cell in order to produce high purity titanium.

摘要翻译： 一种在电解槽中还原固体状态的氧化钛的方法，该方法包括阳极，至少部分由氧化钛形成的阴极，以及包含能够化学还原阴极的金属阳离子的熔融电解质 氧化钛，该方法包括以高于能够化学还原阴极氧化钛的金属的阳离子作为阴极上的金属沉积的电位的电位操作电池，由此金属化学还原阴极氧化钛 并且该方法的特征在于，考虑到细胞中发生的反应和细胞中的氧化钛中的氧浓度，根据需要刷新电解质的后期阶段和/或改变细胞电位 以生产高纯钛。

公开(公告)号：US20070251833A1

公开(公告)日：2007-11-01

申请号：US11668507

申请日：2007-01-30

申请人： Ivan Ratchev ,  Rene Olivares ,  Gregory Rigby ,  Sergey Bliznyukov

发明人： Ivan Ratchev ,  Rene Olivares ,  Gregory Rigby ,  Sergey Bliznyukov

IPC分类号： C02F1/461

CPC分类号： C22B34/1263 ,  C22B5/00 ,  C22B9/14 ,  C22B34/129 ,  C22B34/1295 ,  C25C3/00 ,  C25C7/06

摘要： A process for minimising reoxidation of reduced material is disclosed. The process applies to reduced material that has been formed by a process of electrochemically reducing a metal oxide feed material, such as titania, in a solid state in an electrolytic cell containing a molten electrolyte. The process for minimising reoxidation includes applying an electrical potential to reduced material at least while the reduced material remains immersed in the molten electrolyte.

摘要翻译： 公开了一种使还原材料的再氧化最小化的方法。 该方法适用于通过在含有熔融电解质的电解槽中以固态电化学还原金属氧化物进料如二氧化钛的方法形成的还原材料。 最小化再氧化的方法包括至少在还原材料保持浸入熔融电解质中时将电势施加到还原材料上。