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11. 发明授权

US4954322A Process for the recovery of metal values contained in a gangue 失效
标题翻译：恢复g石中所含金属价值的过程
公开(公告)号：US4954322A
公开(公告)日：1990-09-04
申请号：US385456
申请日：1989-07-27
申请人： Jean-Michel DeMarthe
发明人： Jean-Michel DeMarthe
IPC分类号： C01B17/90 , C22B3/08 , C22B3/22
CPC分类号： C01B17/901 , C01B17/903 , C22B3/08 , C22B3/22 , Y02P10/234
摘要： The invention relates to a process for the recovery of metal values contained in a ferric gangue.The process comprises the following stages:(a) dissolution of the metal values from the ferric gangue with sulphuric acid;(b) recovery of the metal value or values by a method which is known per se,(c) evaporation of the acid ferric solution resulting from stage (b) so as to increase the acidity to a value of between about 50 and 100%,(d) crystallization from this solution, at a temperature of between -10 and 50.degree. C., of a hydrated iron sulphate of formula Fe.sub.2 (SO.sub.4).sub.3.9H.sub.2 O.Application to the recovery of strategic metals.
摘要翻译：本发明涉及一种回收铁ang石中所含金属价值的方法。该过程包括以下阶段：（a）用硫酸从铁g石中溶出金属值; （b）通过本身已知的方法回收金属值或值，（c）从阶段（b）产生的酸性三价铁溶液的蒸发，以将酸度增加至约50％和100％之间的值，，（d）在-10至50℃的温度下从该溶液中结晶出式Fe2（SO4）3·4H2O的水合硫酸铁。适用于战略金属的回收。

12. 发明授权

US4177119A Process for recovery of waste H.sub.2 SO.sub.4 and HCl 失效
标题翻译：回收废H2SO4和HCl的方法
公开(公告)号：US4177119A
公开(公告)日：1979-12-04
申请号：US936595
申请日：1978-08-24
申请人： Morio Watanabe , Sanji Nishimura
发明人： Morio Watanabe , Sanji Nishimura
IPC分类号： C01B7/00 , C01B7/01 , C01B17/90 , C01G49/00 , C23G1/36 , C25C1/06 , C25B1/22
CPC分类号： C25C1/06 , C01B17/902 , C01B17/903 , C01B7/01 , C01G49/0009 , C23G1/36 , Y10S423/14
摘要： This invention relates to a process for recovery of waste H.sub.2 SO.sub.4 and HCl which are used for pickling metallic materials and articles and contain a large quantities of Fe ions. Furthermore, it offers a process for the recovery of H.sub.2 SO.sub.4 and HCl from waste H.sub.2 SO.sub.4 which contains large amounts of Fe ions after removal of Ti ions by a hydrolysis process in the production of TiO.sub.2 and also for the recovery of high-purity electrolytic iron or iron hydroxide.
摘要翻译：本发明涉及回收用于酸洗金属材料和制品并含有大量Fe离子的废H2SO4和HCl的方法。此外，它提供了一种从废物H2SO4中回收H2SO4和HCl的方法，其中通过在制备TiO 2中的水解过程除去Ti离子之后含有大量的Fe离子，并且还用于回收高纯度电解铁或铁氢氧化物。

13. 发明授权

US08052953B2 Method for recovering sulfuric acid from concentrated acid hydrolysate of plant cellulose material 有权
标题翻译：从植物纤维素材料的浓酸水解产物中回收硫酸的方法
公开(公告)号：US08052953B2
公开(公告)日：2011-11-08
申请号：US12678634
申请日：2008-07-29
申请人： Peihao Chen
发明人： Peihao Chen
IPC分类号： C01B17/74 , C07H1/06 , C07H1/08 , C13K1/02
CPC分类号： C13K1/02 , C01B17/90 , C01B17/903
摘要： A method for recovering sulfuric acid from concentrated acid hydrolysate of plant cellulose material is disclosed. In some of the examples, the concentrated acid hydrolysate is mixed with a liquid organic precipitant, with the sugars in the hydrolysate being precipitated and separated out. The remainder is sulfuric acid and an organic solvent solution. The organic solvent is then separated by distillation or extraction, thereby obtaining the pure sulfuric acid solution. This precipitation method can recover above 90% sugars and acids with a small amount of organic precipitant, which greatly reduces the recovery cost.
摘要翻译：公开了从植物纤维素材料的浓酸水解产物中回收硫酸的方法。在一些实施例中，将浓缩的酸水解产物与液体有机沉淀剂混合，水解产物中的糖被沉淀并分离出来。其余为硫酸和有机溶剂溶液。然后通过蒸馏或萃取分离有机溶剂，由此得到纯硫酸溶液。该沉淀法可以回收90％以上的糖和酸，少量的有机沉淀剂，大大降低了回收成本。

14. 发明申请

US20100284900A1 METHOD FOR RECOVERING SULFURIC ACID FROM CONCENTRATED ACID HYDROLYSATE OF PLANT CELLULOSE MATERIAL 有权
标题翻译：用于从植物纤维素材料的浓缩酸水解产物中回收硫酸的方法
公开(公告)号：US20100284900A1
公开(公告)日：2010-11-11
申请号：US12678634
申请日：2008-07-29
申请人： Peihao Chen
发明人： Peihao Chen
IPC分类号： C01B17/90
CPC分类号： C13K1/02 , C01B17/90 , C01B17/903
摘要： A method for recovering sulfuric acid from concentrated acid hydrolysate of plant cellulose material is disclosed. In some of the examples, the concentrated acid hydrolysate is mixed with a liquid organic precipitant, thereby the sugars in the hydrolysate is precipitated and separated out, and the remained is sulfuric acid and an organic solvent solution. Then the organic solvent is separated by distillation or extraction, thereby obtaining the pure sulfuric acid solution. This precipitation method can recover above 90% sugars and acids with a small amount of organic precipitant, which greatly reduces the recover cost. In the other examples, the method includes: mixing the concentrated acid hydrolysate with a water-immiscible alcohol, thereby separating the sugars with a remainder of acid-alcohol solution containing sulfuric acid; contacting the acid-alcohol solution with water, thereby the sulfuric acid enters into the water phase from the organic phase; then separating the organic phase and the water phase, thereby obtaining the sulfuric acid solution. This method avoids the use of poisonous, inflammable and explosive organic solvents and also avoids the energy consumption for recovering these organic solvents, thereby greatly reducing the cost of acid recovery.
摘要翻译：公开了从植物纤维素材料的浓酸水解产物中回收硫酸的方法。在一些实施例中，将浓缩的酸水解产物与液体有机沉淀剂混合，从而使水解产物中的糖沉淀并分离出来，剩下的是硫酸和有机溶剂溶液。然后通过蒸馏或萃取分离有机溶剂，从而得到纯硫酸溶液。该沉淀法可以回收90％以上的糖和酸，少量的有机沉淀剂，大大降低了回收成本。在其他实施例中，该方法包括：将浓酸水解物与水不混溶的醇混合，从而将糖与剩余的含有硫酸的酸 - 醇溶液分离; 使酸 - 醇溶液与水接触，从而使硫酸从有机相进入水相; 然后分离有机相和水相，从而得到硫酸溶液。该方法避免使用有毒，易燃易爆的有机溶剂，并避免回收这些有机溶剂的能量消耗，从而大大降低酸回收成本。

15. 发明授权

US06337061B1 Method for reclaiming metal sulfate-containing waste sulfuric acid 失效
标题翻译：回收金属硫酸盐废硫酸的方法
公开(公告)号：US06337061B1
公开(公告)日：2002-01-08
申请号：US08406946
申请日：1995-03-28
申请人： Nobuyoshi Iyatomi , Yasuie Mikami
发明人： Nobuyoshi Iyatomi , Yasuie Mikami
IPC分类号： C01B1790
CPC分类号： C22B34/1259 , C01B17/902 , C01B17/903 , C01G23/001 , C22B34/125 , Y10S423/02
摘要： For the purpose of efficiently and easily regenerating a sulfuric acid solution having a high concentration and a low impurity content from a metal sulfate-containing waste sulfuric acid solution and waste liquor formed during acid cleaning which are discharged from titanium (IV) oxide-production process carried out according to the sulfuric acid method, titanium present in the metal sulfate-containing waste sulfuric acid solution is removed through a solvent-extraction treatment and then the solution obtained after the solvent-extraction is subjected to a diffusive dialysis treatment.
摘要翻译：为了从含有金属硫酸盐的废硫酸溶液和在酸清洗期间形成的从钛（IV）氧化物生产过程中排出的废液高效且容易地再生具有高浓度和低杂质含量的硫酸溶液根据硫酸法进行，通过溶剂萃取处理除去存在于含金属硫酸盐的废硫酸溶液中的钛，然后对溶剂萃取后得到的溶液进行扩散透析处理。

16. 发明授权

US5489423A Process for recovering sulfuric acid from metallic sulfate-containing exhaust sulfuric acid 失效
标题翻译：从含金属硫酸盐的废硫酸中回收硫酸的方法
公开(公告)号：US5489423A
公开(公告)日：1996-02-06
申请号：US968099
申请日：1992-10-29
申请人： Yasuie Mikami , Nobuyoshi Iyatomi
发明人： Yasuie Mikami , Nobuyoshi Iyatomi
IPC分类号： C01B17/90 , C01G23/00 , C01G23/04 , C22B34/12 , C01B17/69
CPC分类号： C01G23/001 , C01B17/90 , C01B17/903 , C22B34/125 , Y10S423/02
摘要： In order to efficiently and easily recover a spent sulfuric acid exhasuted, for example, in an acid washing liquid or in producing titanium dioxide by a sulfate method in a large amount, as highly concentrated sulfuric acid, bivalent iron ions in the spent sulfuric acid containing metal sulfate are first oxidized into trivalent iron ions, hydrochloric acid is added to such a liquid and then solvent extraction is carried out.
摘要翻译：为了有效且容易地回收例如在酸性洗涤液中或通过硫酸盐法大量生成二氧化钛的废硫酸作为高浓度硫酸回收，所述废硫酸中含有二价铁离子金属硫酸盐首先被氧化成三价铁离子，向这种液体中加入盐酸，然后进行溶剂萃取。

17. 发明授权

US5051187A Process for recovering sulfuric acid 失效
标题翻译：回收硫酸的方法
公开(公告)号：US5051187A
公开(公告)日：1991-09-24
申请号：US570488
申请日：1990-08-21
申请人： Yukiei Matsumoto , Takanobu Hayashi
发明人： Yukiei Matsumoto , Takanobu Hayashi
IPC分类号： C02F1/26 , C01B17/90 , C02F1/461 , C02F9/00
CPC分类号： C01B17/903 , Y10S210/912
摘要： A process for recovering sulfuric acid from an aqueous sulfuric acid solution containing ferrous sulfate is disclosed, which comprises electrolyzing the aqueous sulfuric acid solution containing ferrous sulfate to thereby oxidize ferrous ion dissolved in the solution to ferric ion, and then removing the ferric ion by solvent extraction using a solvent and an extractant.
摘要翻译：公开了从含硫酸亚铁的硫酸水溶液中回收硫酸的方法，包括电解含硫酸亚铁的硫酸水溶液，从而将溶解在该溶液中的亚铁离子氧化成铁离子，然后用溶剂除去三价铁离子使用溶剂和萃取剂萃取。

18. 发明授权

US5009868A Process for the extended use of strip acid employed in the reclamation of battery acid fluid from expanded lead-acid batteries 失效
标题翻译：用于延长使用膨胀铅酸电池电池酸性液体回收利用的带状酸的方法
公开(公告)号：US5009868A
公开(公告)日：1991-04-23
申请号：US454770
申请日：1989-12-21
申请人： Robert A. Spitz , Mark Bricker
发明人： Robert A. Spitz , Mark Bricker
IPC分类号： B01D11/04 , C01B17/90 , H01M10/54
CPC分类号： H01M10/54 , C01B17/903 , Y02W30/84 , Y10S423/02
摘要： The present invention discloses a process for rejuvenation of strip acid employed in the reclamation of expended lead-acid battery acid through extraction and filtration for removing metallic impurities from the battery acid. In the process of removing impurities from battery acid through extraction, the extractant becomes loaded with impurities and loses its effectiveness. Extractant may be regenerated by contacting it with an strip acid. In the present invention, a reduction process is employed to regenerate the strip acid so that it may be used repeatedly. By recycling the extractant and the strip acid in the present invention, the present process further increases the effectiveness of battery acid regeneration--producing a reclaimed battery acid fluid which performs very well in new batteries and substantially reducing by-product waste in the regeneration of the battery acid.
摘要翻译：本发明公开了一种通过萃取和过滤从废电池酸中除去金属杂质而在废弃铅酸蓄电池酸中回收利用的带状酸的再生方法。在通过萃取从电池酸中除去杂质的过程中，萃取剂变成负载杂质，失去效力。萃取剂可以通过与带状酸接触来再生。在本发明中，采用还原方法来再生带状酸，以便可以重复使用。通过在本发明中再循环萃取剂和带状酸，本方法进一步提高了电池酸再生的效果，产生了在新电池中表现得非常好的再生电池酸性流体，并且在再生中大大减少了副产物浪费电池酸。

19. 发明授权

US4971780A Process for the reclamation of battery acid and fluid from expended lead-acid batteries 失效
标题翻译：消耗铅酸电池回收酸性电池和液体的工艺
公开(公告)号：US4971780A
公开(公告)日：1990-11-20
申请号：US312429
申请日：1989-02-17
申请人： Robert A. Spitz
发明人： Robert A. Spitz
IPC分类号： C01B17/90 , H01M10/54
CPC分类号： C01B17/903 , H01M10/54 , Y02W30/84 , Y10S423/02
摘要： The present invention discloses a process of extraction and filtration for removing metallic impurities from the acid in used lead-acid batteries. Produced is a reclaimed battery acid fluid which performs very well in new batteries and which avoids the severe costs and environmental risks entailed in present methods of battery acid fluid disposal.
摘要翻译：本发明公开了一种用于从使用过的铅酸电池中的酸中除去金属杂质的提取和过滤方法。生产的再生电池酸性液体在新电池中表现非常好，避免了电池酸性流体处理的现有方法所带来的严重成本和环境风险。

20. 发明授权

US4440734A Process for the recovery of sulfuric acid 失效
标题翻译：回收硫酸的方法
公开(公告)号：US4440734A
公开(公告)日：1984-04-03
申请号：US347785
申请日：1982-02-11
申请人： Demetre Kougioumoutzakis
发明人： Demetre Kougioumoutzakis
IPC分类号： C01B17/90 , C01B17/92 , C01C1/242 , C22B3/26 , C22B3/28 , C22B3/40
CPC分类号： C22B3/0012 , C01B17/903 , C01B17/925 , C01C1/242 , C22B3/0009 , C22B3/0095 , Y02P10/234 , Y10S423/02
摘要： The disclosure describes the recovery of sulfuric acid from industrial liquors containing the same. A selective liquid-liquid extraction of said liquors is carried out under conditions producing an organic phase containing the sulfuric acid and an aqueous phase eventually containing impurities. The organic phase is treated with a base, such as gaseous NH.sub.3, in order to separate the sulfuric acid. This process is simple, non-polluting, and requires little energy.
摘要翻译：本公开描述了从含有该硫酸的工业液中回收硫酸。所述液体的选择性液 - 液萃取在产生含有硫酸的有机相和最终含有杂质的水相的条件下进行。有机相用碱（如气态NH 3）处理，以分离硫酸。这个过程简单，无污染，需要的能量很少。

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