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1. 发明授权

US10233551B2 Apparatus for making and concentrating an aqueous caustic alkali 有权
公开(公告)号：US10233551B2
公开(公告)日：2019-03-19
申请号：US14666082
申请日：2015-03-23
申请人： Westlake Vinyl Corporation
发明人： Anthony B. Davis , Thomas H. Yohe , Russell F. Dunn
IPC分类号： B01D1/26 , C01D1/42 , C25B15/08 , C01D1/40 , C25B1/16 , C02F1/04 , C25B1/46
摘要： A method for concentrating an aqueous caustic alkali produced by a membrane cell process by using a single or multiple effect evaporator system in which the vapor flows in a counter direction to the aqueous caustic alkali flow and the heat recovered from the catholyte circulation line is used as part of the concentration process. In one embodiment, a catholyte heat recovery heat exchanger and flash evaporation chamber are located after the last effect of a multiple effect evaporator system. In another embodiment, the catholyte heat recovery heat exchanger and flash evaporation chamber are located prior to the single or multiple effect evaporator system. In yet another embodiment, the catholyte heat recovery process is used in conjunction with additional heat exchanger processes to further concentrate the final product as desired.

2. 发明授权

US5976349A Process for the removal of metal impurities by an electrochemical route 失效
标题翻译：通过电化学途径去除金属杂质的方法
公开(公告)号：US5976349A
公开(公告)日：1999-11-02
申请号：US836794
申请日：1997-07-28
申请人： Frederic Kuntzburger , Jean-Claude Magne
发明人： Frederic Kuntzburger , Jean-Claude Magne
IPC分类号： C01D1/40 , C25B1/16 , C25C7/02
CPC分类号： C25C7/02 , C01D1/40
摘要： A method for electrochemically purifying solutions with a pH higher than 14 to reduce metal impurities to the level of traces. The method comprises processing the solutions in an electrolytic cell in which the cathode has a fibrous web produced from a mixture of fibres including at least one fraction consisting of electrically conductive fibres and a binder selected from fluoropolymers, said fibrous web being deposited on an electrically conductive porous support. Said cathode may also be combined with a diaphragm or a membrane. A cathode having a fibrous web produced from a mixture of carbon fibres, cellulose compounds, and a cationic polymer such as cationic starch is also disclosed.
摘要翻译： PCT No.PCT / FR95 / 01530 Sec。 371日期1997年7月28日第 102（e）日期1997年7月28日PCT 1995年11月21日PCT PCT。公开号WO96 / 15984 日期1996年5月30日一种电化学纯化pH高于14的溶液的方法，以将金属杂质降低到痕量水平。该方法包括在电解池中处理溶液，其中阴极具有由包含至少一部分由导电纤维组成的纤维和选自含氟聚合物的粘合剂的纤维混合物产生的纤维网，所述纤维网被沉积在导电多孔支撑。所述阴极还可以与膜片或膜组合。还公开了具有由碳纤维，纤维素化合物和阳离子聚合物如阳离子淀粉的混合物制成的纤维网的阴极。

3. 发明授权

US5753097A Process for purifying hydroxide compounds 失效
标题翻译：氢化物化合物的纯化方法
公开(公告)号：US5753097A
公开(公告)日：1998-05-19
申请号：US725626
申请日：1996-10-03
申请人： Hossein Sharifian , John E. Mooney
发明人： Hossein Sharifian , John E. Mooney
IPC分类号： B01D61/44 , C01B13/16 , C01D1/40 , C07C209/84 , C25B7/00 , C25B9/00
CPC分类号： C07C209/84 , B01D61/445 , C01B13/16 , C01D1/40
摘要： In one embodiment, the invention relates to a process for purifying solutions containing a hydroxide compound, including the steps of: (A) providing an electrochemical cell containing an anode, a cathode, a cation selective membrane and a bipolar membrane, the bipolar membrane having an anion selective side facing the anode and a cation selective side facing the cathode, wherein the cation selective membrane is positioned between the anode and the bipolar membrane, and the bipolar membrane is positioned between the cation selective membrane and the cathode, thereby defining a feed compartment between the cation selective membrane and the anode, a recovery compartment between the bipolar membrane and the cation selective membrane, and a water compartment between the bipolar membrane and the cathode; (B) charging a solution of an ionic compound at a first concentration to the water compartment, and water to the recovery compartment; (C) charging a solution containing the hydroxide compound at a second concentration to the feed compartment; (D) passing a current through the electrochemical cell to produce the hydroxide compound at a third concentration in the recovery compartment; and (E) recovering the hydroxide compound from the recovery compartment.
摘要翻译：在一个实施方案中，本发明涉及一种用于纯化含有氢氧化物化合物的溶液的方法，包括以下步骤：（A）提供含有阳极，阴极，阳离子选择性膜和双极性膜的电化学电池，所述双极性膜具有面向阳极的阴离子选择侧和面向阴极的阳离子选择侧，其中阳离子选择性膜位于阳极和双极膜之间，并且双极膜位于阳离子选择性膜和阴极之间，从而限定进料阳离子选择性膜和阳极之间的隔间，双极性膜和阳离子选择性膜之间的回收室，以及双极性膜与阴极之间的水隔室; （B）将第一浓度的离子化合物的溶液装入水室，并将水加到回收室; （C）将含有第二浓度的氢氧化物的溶液装入进料室; （D）使电流通过电化学电池以在回收室中产生第三浓度的氢氧化物; 和（E）从回收室回收氢氧化物。

4. 发明授权

US4189362A Method of purifying aqueous solutions of alkali metal hydroxides 失效
标题翻译：净化碱金属氢氧化物水溶液的方法
公开(公告)号：US4189362A
公开(公告)日：1980-02-19
申请号：US3151
申请日：1979-01-15
申请人： Ronald L. Dotson
发明人： Ronald L. Dotson
IPC分类号： C01D1/40 , C02F1/461 , C02F1/467 , C02C5/12 , C25B1/16
CPC分类号： C01D1/40 , C02F1/46104 , C02F1/467 , C02F1/4678 , C02F2001/46123 , C02F2001/46157 , C02F2101/20
摘要： An electrolytic process is described for purifying an aqueous solution of an alkali metal hydroxide containing an impurity of a soluble heavy metal complex comprised of a heavy metal cation and a plurality of anions.For example, an aqueous solution of sodium hydroxide containing a soluble heavy metal complex, such as mercuric polysulfide, [HgS].sup.+ S.sup.-, is charged to the electrolytic chamber of an electrolytic cell. An electric current is employed to reduce heavy metal cations to a separate phase in elemental form, and simultaneously to oxidize anions to a separate phase in elemental form, and to form a slurry of the separate phases in elemental forms in the aqueous solution.The slurry is removed from the electrolytic chamber and the phases of elemental forms are separated from the purified aqueous solution. The purified alkali metal hydroxide solution is sold commercially or otherwise utilized.
摘要翻译：描述了用于纯化含有由重金属阳离子和多个阴离子组成的可溶性重金属络合物的杂质的碱金属氢氧化物的水溶液的电解方法。例如，将含有可溶性重金属络合物如汞硫化物[HgS] + S-的氢氧化钠水溶液加入到电解槽的电解室中。使用电流将重金属阳离子还原为单质相的单质相，同时将阴离子氧化成单质相的单质相，并在水溶液中形成元素分离相的浆液。将浆料从电解槽中取出，并将元素相与纯化的水溶液分离。纯化的碱金属氢氧化物溶液以商业或其他方式销售。

5. 发明授权

US3784456A Apparatus and method for purifying alkali metal hydroxide solutions 失效
标题翻译：用于净化碱金属氢氧化物溶液的装置和方法
公开(公告)号：US3784456A
公开(公告)日：1974-01-08
申请号：US3784456D
申请日：1972-03-02
申请人： PPG INDUSTRIES INC
发明人： OTTO J
IPC分类号： C01D1/40 , C25B9/06 , B01K3/00 , B01K3/04
CPC分类号： C01D1/40 , C25B9/06
摘要： Aqueous alkali metal hydroxide solutions are purified by passage through a porous cathode of an electrolytic cell having an anode located downstream of the cathode. An electrolytic cell of special construction particularly useful is described.
摘要翻译：通过通过具有位于阴极下游的阳极的电解池的多孔阴极来纯化碱金属氢氧化物水溶液。描述特别有用的特殊结构的电解池。

6. 发明授权

US1415186A Process of eliminating color from caustic alkali 失效
标题翻译：从苛性碱中除去颜色的工艺
公开(公告)号：US1415186A
公开(公告)日：1922-05-09
申请号：US27312919
申请日：1919-01-25
申请人： EASTERN POTASH CORP
发明人： MEADOWS THOMAS C , RUHM HERMAN D
IPC分类号： C01D1/40
CPC分类号： C01D1/40

7. 发明公开

US20240051838A1 METHOD FOR PRODUCING LITHIUM HYDROXIDE 审中-公开
公开(公告)号：US20240051838A1
公开(公告)日：2024-02-15
申请号：US18551635
申请日：2022-03-25
申请人： IDEMITSU KOSAN CO.,LTD.
发明人： Shota HOSHI , Daisuke MORI , Futoshi UTSUNO , Atsushi SATO , Satoshi KATSUMATA
IPC分类号： C01D15/02 , B01D61/46 , B01D15/20 , C22B26/12 , C22B3/24 , C01D1/40 , C01D1/42 , B01J20/06
CPC分类号： C01D15/02 , B01D61/46 , B01D15/203 , C22B26/12 , C22B3/24 , C01D1/40 , C01D1/42 , B01J20/06
摘要： A method of producing lithium hydroxide using a variety of aqueous solutions as a source liquid. The method includes: providing a lithium ion extraction liquid, including a first mixing of an aqueous solution containing lithium and at least one kind of an element other than lithium and a base in a reaction tank, with a pH regulated to 6 or more and 10 or less, a second mixing of the aqueous solution and the base, with a pH regulated to 12 or more, and removal of a hydroxide of the element other than lithium formed through the first and second mixing; recovering only lithium ion from the lithium ion extraction liquid to a recovery liquid with an electrochemical device including a Li-selectively permeable membrane; and performing the regulation of pH by returning the lithium ion extraction liquid after recovering lithium ion with the electrochemical device to the reaction tank.

8. 发明授权

US08986517B2 Method and apparatus for making and concentrating an aqueous caustic alkali 有权
标题翻译：用于制造和浓缩苛性碱水溶液的方法和设备
公开(公告)号：US08986517B2
公开(公告)日：2015-03-24
申请号：US13650932
申请日：2012-10-12
申请人： Westlake Vinyl Corporation
发明人： Anthony B. Davis , Thomas H. Yohe , Russell F. Dunn
IPC分类号： C25B9/00 , C25B1/16 , C01D1/40 , C01D1/42 , C25B15/08 , B01D1/26 , C02F1/04
CPC分类号： C25B15/08 , B01D1/26 , C01D1/40 , C01D1/42 , C02F1/048 , C25B1/16 , C25B1/46 , Y02P20/124 , Y02P20/57 , Y02P70/34
摘要： A method for concentrating an aqueous caustic alkali produced by a membrane cell process by using a single or multiple effect evaporator system in which the vapor flows in a counter direction to the aqueous caustic alkali flow and the heat recovered from the catholyte circulation line is used as part of the concentration process. In one embodiment, a catholyte heat recovery heat exchanger and flash evaporation chamber are located after the last effect of a multiple effect evaporator system. In another embodiment, the catholyte heat recovery heat exchanger and flash evaporation chamber are located prior to the single or multiple effect evaporator system. In yet another embodiment, the catholyte heat recovery process is used in conjunction with additional heat exchanger processes to further concentrate the final product as desired.
摘要翻译：通过使用单一或多重效应蒸发器系统浓缩通过膜电池工艺产生的苛性碱水溶液的方法，其中蒸汽沿碱性碱水流向逆向流动并且从阴极电解液循环管线回收的热量被用作部分浓缩过程。在一个实施方案中，阴极电解液热回收热交换器和闪蒸蒸发室位于多效蒸发器系统的最后效果之后。在另一个实施方案中，阴极电解液热回收热交换器和闪蒸蒸发室位于单效或多效蒸发器系统之前。在另一个实施方案中，阴极电解液热回收方法与另外的热交换器方法结合使用，以根据需要进一步浓缩最终产物。

9. 发明授权

US5282935A Electrodialytic process for producing an alkali solution 失效
标题翻译：用于生产碱溶液的电渗析方法
公开(公告)号：US5282935A
公开(公告)日：1994-02-01
申请号：US867557
申请日：1992-04-13
申请人： David W. Cawlfield , Jerry J. Kaczur
发明人： David W. Cawlfield , Jerry J. Kaczur
IPC分类号： B01D61/46 , B01D61/44 , B01D61/52 , C01D1/40
CPC分类号： B01D61/445 , B01D61/52 , C01D1/40
摘要： A bipolar water ionizing electrode and a process employing such an electrode in an electrodialytic cell are disclosed. The cell has a plurality of ion exchange compartments separated by cation permselective membranes and the bipolar water ionizing electrode. The bipolar electrode is permeable to gas and electric current and impervious to liquid.
摘要翻译：公开了双极水电离电极和在电渗析池中使用这种电极的方法。电池具有多个由阳离子选择选择膜和双极水离子电极隔开的离子交换室。双极电极对气体和电流是可渗透的，不透液体。

10. 发明授权

US4976838A Method for purification of bases from materials comprising base and salt 失效
标题翻译：从包含碱和盐的材料中纯化碱的方法
公开(公告)号：US4976838A
公开(公告)日：1990-12-11
申请号：US278626
申请日：1988-12-01
申请人： Krishnamurthy N. Mani , Frederick P. Chlanda , Yu-Chih Chiao
发明人： Krishnamurthy N. Mani , Frederick P. Chlanda , Yu-Chih Chiao
IPC分类号： B01D61/44 , C01D1/38 , C01D1/40 , H01M10/54
CPC分类号： B01D61/445 , C01D1/38 , H01M10/54 , Y02W30/84
摘要： The present invention is a method of recovery of base from material comprising base or acid and salts. The method is conducted in an apparatus comprising a cation membrane between two bipolar membranes.
摘要翻译：本发明是从包含碱或酸和盐的材料中回收碱的方法。该方法在包括两个双极膜之间的阳离子膜的装置中进行。

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