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1. 发明申请

WO2023021347A1 NICKEL AND COBALT SEPARATION IN A PTA PROCESS 审中-公开
公开(公告)号：WO2023021347A1
公开(公告)日：2023-02-23
申请号：PCT/IB2022/056897
申请日：2022-07-26
申请人： KOCH TECHNOLOGY SOLUTIONS UK LIMITED , KOCH TECHNOLOGY SOLUTIONS, LLC , ECO-TEC INC.
发明人： COLLIAS, Constantine , WHISTON, Keith , GANNON, Peter Anthony
IPC分类号： C07C51/47 , C07C63/26 , C07C51/265
摘要： A process for preparing an aromatic polycarboxylic acid is provided. The process includes the steps of: (a) providing a first liquid stream derived from an oxidation process of an aromatic starting material having two or more C1-C6 alkyl substituents, the first liquid stream comprising nickel cations and cobalt and/or manganese cations; (b) contacting the first liquid stream with a solid-phase chelating agent, wherein the solid-phase chelating agent has a higher binding affinity for nickel cations than cobalt and/or manganese cations; (c) allowing the nickel cations to bind to the solid-phase chelating agent; (d) removing from the solid-phase chelating agent a second liquid stream comprising a higher ratio of cobalt and/or manganese cations to nickel cations than the ratio of cobalt and/or manganese cations to nickel cations contained in the first liquid stream; and (e) recycling the second liquid stream into the oxidation process of aromatic starting material.

2. 发明申请

WO2006012728A1 METHOD AND APPARATUS FOR INCREASING FILTER CONTAMINANT LOADING CAPACITY 审中-公开
标题翻译：用于增加过滤器污染物装载能力的方法和装置
公开(公告)号：WO2006012728A1
公开(公告)日：2006-02-09
申请号：PCT/CA2005/001042
申请日：2005-07-04
申请人： ECO-TEC LIMITED , BROWN, Craig, J. , SHEEDY, Michael, A.
发明人： BROWN, Craig, J. , SHEEDY, Michael, A.
IPC分类号： B01D24/46
CPC分类号： B01D24/007 , B01D24/4631
摘要： The filter contaminant loading capacity of a depth granular media filter is increased by imposing a so-called "back-slip" on the filter bed. At intervals between normal backwashing, a volume of liquid is passed upwardly through the media bed under flow conditions selected to displace at least some of the contaminants upwardly in the bed while essentially removing none of the contaminants from the filter vessel. Preferably, the filter bed comprises at least two media types of different but uniform particle sizes and densities, the media types each forming a distinct layer in which the effective particle size of the media in each successive layer decreases in a downward direction in the vessel.
摘要翻译：通过在过滤床上施加所谓的“反滑”来增加深度颗粒状介质过滤器的过滤器污染物负载能力。在正常回洗之间的间隔，一定体积的液体在流动条件下向上通过介质床，所述流动条件被选择为在床中向上移动至少一些污染物，同时基本上从过滤器容器中除去任何污染物。优选地，过滤床包括不同但均匀的粒度和密度的至少两种介质类型，所述介质类型各自形成不同的层，其中每个连续层中的介质的有效粒度在容器中沿向下的方向减小。

3. 发明申请

WO2017027953A1 PROCESS FOR STRIPPING CARBAMATE FROM ION EXCHANGE RESIN 审中-公开
标题翻译：离子交换树脂剥离碳酸钙的工艺
公开(公告)号：WO2017027953A1
公开(公告)日：2017-02-23
申请号：PCT/CA2015/000471
申请日：2015-08-20
申请人： ECO-TEC LTD.
发明人： SHEEDY, Michael, A.
IPC分类号： B01J47/00
CPC分类号： B01J49/57 , B01J41/05 , B01J49/07
摘要： In a preferred embodiment, there is provided a process for separating an amine compound or a conjugate acid thereof and a carbamate compound or a conjugate acid thereof from a mixture having the amine compound, the carbamate compound, carbon dioxide and at least one anionic contaminant salt using an anionic exchange column, the process including passing the mixture through the column to obtain a first effluent and passing through the column an extraction fluid to obtain a second effluent, where the extraction fluid most preferably includes carbonic acid.
摘要翻译：在优选的实施方案中，提供了一种从具有胺化合物，氨基甲酸酯化合物，二氧化碳和至少一种阴离子污染物盐的混合物中分离胺化合物或其共轭酸和氨基甲酸酯化合物或其共轭酸的方法使用阴离子交换柱，该方法包括使混合物通过柱以获得第一流出物并通过塔提取提取流体以获得第二流出物，其中萃取流体最优选包括碳酸。

4. 发明申请

WO2003035934A1 PROCESS AND APPARATUS FOR RECOVERY OF PEROXIDE CONTAINING PICKLING SOLUTIONS 审中-公开
标题翻译：用于回收含过氧化物的方法和装置
公开(公告)号：WO2003035934A1
公开(公告)日：2003-05-01
申请号：PCT/CA2002/001598
申请日：2002-10-24
申请人： ECO-TEC LIMITED , BROWN, Craig, J.
发明人： BROWN, Craig, J.
IPC分类号： C23G1/36
CPC分类号： B01D69/02 , B01D61/027 , B01D61/04 , B01D2311/04 , C23G1/36
摘要： A process and apparatus for recovery of spent liquor containing acid and hydrogen peroxide from a metal pickling process. The temperature of the spent pickle liquor is reduced below the pickling process temperature and then treated by a nanofiltration process to produce a permeate solution with reduced metal concentration which is collected from the nanofiltration process and recycled to the metal pickling process.
摘要翻译：一种从金属酸洗工艺回收含有酸和过氧化氢的废液的方法和装置。废酸洗液的温度降低到酸洗过程温度以下，然后通过纳滤过程进行处理，以产生从纳滤过程中收集的金属浓度降低的渗透液，并再循环至金属酸洗工艺。

5. 发明申请

WO2020191484A1 PROCESSES FOR TREATING ELECTROLYTE FROM AN ELECTROREFINING PROCESS 审中-公开
公开(公告)号：WO2020191484A1
公开(公告)日：2020-10-01
申请号：PCT/CA2020/050370
申请日：2020-03-20
申请人： ECO-TEC LIMITED
发明人： KRYST, Katerina , SHEEDY, Michael
IPC分类号： C02F9/04 , C02F1/28 , C02F1/42 , C02F1/70 , C25C1/12 , C25C7/06 , C02F1/461 , C01G3/00
摘要： Process of treating an aqueous solution comprising arsenic impurities, such as an electrolyte from electrorefining of copper, the process comprising reducing As(V) to As(III) using SO 2 ; and removing As(III) via cation exchange using a chelating resin, such as a polymeric resin with a polyhydroxy amine functional group. The process can further comprise membrane contact between electrolyte feed stream and reduction reaction product stream to selectively transfer residual SO 2 in the product stream to the electrolyte feed steam.

6. 发明申请

WO1996022153A1 PROCESS AND APPARATUS FOR PURIFICATION OF CONTAMINATED ACIDS 审中-公开
标题翻译：用于净化污染酸的方法和装置
公开(公告)号：WO1996022153A1
公开(公告)日：1996-07-25
申请号：PCT/CA1996000022
申请日：1996-01-15
申请人： ECO-TEC LIMITED
发明人： ECO-TEC LIMITED , BROWN, Craig, J.
IPC分类号： B01D61/04
CPC分类号： B01D61/027 , B01D61/04 , B01D61/243 , B01D61/58 , B01D2311/04 , B01J41/05 , C01B17/902 , C02F1/442 , C23G1/36 , B01D2311/18 , B01D2311/25
摘要： Acids contaminated with multi-valent metal salts are purified by a process which involves treatment in an acid sorption unit (ASU) and a nanofiltration unit (NFU). The feed solution can first be delivered to the ASU, which produces two solutions, one high in acid concentration and the other high in metal salt concentration. The high acid concentration solution can be treated in the NFU to produce an acid end product and a reject metal salt solution which can be recirculated to the feed of the NFU. Alternatively, the high metal salt solution can be treated in the NFU, and its permeate recirculated to the ASU as eluate. In an alternative configuration, the feed is delivered first to the NFU. In all cases, the membrane reject solution from the NFU is recirculated to increase the metal salt concentration. A second NFU can be used to process the solution from the ASU which contains a high metal salt concentration.
摘要翻译：被多价金属盐污染的酸通过涉及在酸吸附单元（ASU）和纳滤单元（NFU）中处理的方法进行纯化。饲料溶液可以先送到ASU，产生两种溶液，酸浓度高，金属盐浓度高。可以在NFU中处理高酸浓度溶液，以产生可以再循环到NFU进料的酸终产物和废弃金属盐溶液。或者，高金属盐溶液可以在NFU中处理，并且其渗透物作为洗脱液再循环到ASU中。在另一种配置中，饲料首先送到NFU。在所有情况下，来自NFU的膜拒绝溶液被再循环以增加金属盐浓度。第二个NFU可用于处理含有高金属盐浓度的ASU溶液。

7. 发明申请

WO1990015171A1 PROCESS FOR ELECTROPLATING METALS 审中-公开
标题翻译：电镀金属的工艺
公开(公告)号：WO1990015171A1
公开(公告)日：1990-12-13
申请号：PCT/CA1990000137
申请日：1990-04-27
申请人： ECO-TEC LIMITED
发明人： ECO-TEC LIMITED , BROWN, Craig, J.
IPC分类号： C25D21/18
CPC分类号： C25D7/0621 , C25C1/00 , C25C7/00 , C25C7/02 , C25D7/0642
摘要： A process for electroplating metals in an electroplating cell (20) in which the anode current efficiency of the cell is greater than the cathode current efficiency. Buildup of excess metal in the cell is counteracted by circulating the plating solution through an electrowinning cell (40) and plating out the excess metal onto cathodes in the electrowinning cell. The amount of current flowing through the electrowinning cell is controlled so that the amount of the said current which results in the deposition of metal is at least substantially equal to the amount of current flowing through the electroplating cell which results in the evolution of hydrogen gas.

8. 发明申请

WO1998016462A1 TREATMENT OF CHLORINE DIOXIDE GENERATOR EFFLUENT AND FEED STREAMS WITH FIXED-RESIN BED 审中-公开
标题翻译：二氧化氯发生器液体和固定树脂进料流的处理
公开(公告)号：WO1998016462A1
公开(公告)日：1998-04-23
申请号：PCT/CA1997000750
申请日：1997-10-09
申请人： PULP AND PAPER RESEARCH INSTITUTE OF CANADA , ECO-TEC LIMITED , PALEOLOGOU, Michael , THOMPSON, Rokhsareh , BROWN, Craig, J. , SHEEDY, Michael
发明人： PULP AND PAPER RESEARCH INSTITUTE OF CANADA , ECO-TEC LIMITED
IPC分类号： C01B11/02
CPC分类号： C01B17/904 , C01B11/023 , C01D5/16 , Y10S423/14
摘要： A process employing a fixed-resin bed Acid Retardation Unit (ARU) to separate spent acid from chlorine dioxide generators into a de-acidified sodium sulfate component and a purified sulfuric acid component. The de-acidified sodium sulfate produced is returned to the chemical recovery cycle of the kraft mill in place of acidic chlorine dioxide generator effluent thereby avoiding the destruction of alkalinity in pulp mill liquors. In addition, sulfuric acid is purified providing an opportunity for reuse in various mill applications, and/or concentrated and recycled to the generator. Alternatively, to avoid high evaporation costs, the purified acid can be used to regenerate a cation-exchange unit (CEU) used in the conversion of sodium chlorate to a sodium chlorate/chloric acid mixture which is fed to the generator in place of sodium chlorate and sulfuric acid. Using this approach, the sulfuric acid requirement of chlorine dioxide generators and, in turn, the amount of acidic generator effluent can be reduced. The process is applicable to both atmospheric and subatmospheric chlorine dioxide generators. In the latter case, the concentration of the purified sulfuric acid from the ARU or any other acid separation system can be increased by using a portion of it to dissolve the sodium sesquisulfate by-product from such generators.
摘要翻译：一种使用固定树脂床酸延迟单元（ARU）将废酸从二氧化氯发生器分离成脱酸的硫酸钠组分和纯化的硫酸组分的方法。所产生的脱酸硫酸钠返回到牛皮纸磨机的化学回收循环，代替酸性二氧化氯发生器流出物，从而避免纸浆厂液中碱度的破坏。此外，纯化硫酸提供了在各种研磨应用中再利用的机会，和/或浓缩并再循环到发生器中。或者，为了避免高的蒸发成本，可以使用纯化的酸来再生用于将氯酸钠转化成氯酸钠/氯酸混合物的阳离子交换单元（CEU），该氯酸钠/氯酸混合物被供给发生器代替氯酸钠和硫酸。使用这种方法，可以减少二氧化氯发生器的硫酸需求，进而降低酸性发生器流出物的量。该方法适用于大气和低气压的二氧化氯发生器。在后一种情况下，来自ARU或任何其它酸分离系统的纯化硫酸的浓度可以通过使用其一部分来从这种发生器中溶解倍半硫酸钠副产物而增加。

9. 发明申请

WO1995004844A1 PROCESS AND APPARATUS FOR REGENERATION OF VOLATILE ACIDS 审中-公开
标题翻译：用于再生挥发性酸的方法和装置
公开(公告)号：WO1995004844A1
公开(公告)日：1995-02-16
申请号：PCT/CA1994000417
申请日：1994-08-02
申请人： ECO-TEC LIMITED
发明人： ECO-TEC LIMITED , BROWN, Craig, J. , SHEEDY, Michael, A.
IPC分类号： C23G01/36
CPC分类号： C23G1/36 , Y10S159/19 , Y10S203/08 , Y10S203/11 , Y10S423/01
摘要： Volatile acids containing metal salt impurities, such as metal pickling solutions are regenerated by a process in which the acid is subjected to sulfuric acid distillation. Resulting volatile acid vapor is condensed and recycled to the pickle tank, while the residual acid mixture is treated in an acid sorption unit, preferably of the acid retardation type. Acid sorbed in the acid sorption unit is periodically eluted with water and recycled, while metal impurities are rejected in a deacidified by-product solution.
摘要翻译：含有金属盐杂质的挥发性酸如金属酸洗溶液通过酸进行硫酸蒸馏的方法再生。所得到的挥发性酸性蒸汽被冷凝并再循环到酸洗池中，而残留的酸性混合物在酸性吸附单元中处理，优选为酸延迟型。在酸吸附单元中吸附的酸定期用水洗脱并再循环，而金属杂质在脱酸副产物溶液中被排除。

10. 发明申请

WO1992012276A1 ALKALINE ETCHING OF ALUMINUM WITH MATTE FINISH AND LOW WASTE CAPABILITY 审中-公开
标题翻译：铝的碱性蚀刻具有良好的细度和低的废物能力
公开(公告)号：WO1992012276A1
公开(公告)日：1992-07-23
申请号：PCT/CA1991000455
申请日：1991-12-20
申请人： ECO-TEC LIMITED
发明人： ECO-TEC LIMITED , HUNTER, Robert, F. , HOHN, Phillip
IPC分类号： C23F01/46
CPC分类号： B44C1/227 , C23F1/36 , C23F1/46
摘要： A process for etching aluminum in caustic solution capable of providing a consistently uniform matte finish like that of the never dump process, but with little waste like the regeneration process. Etching is performed in a solution containing free sodium hydroxide and dissolved aluminum in a ratio between about 0.6 and 2.1 g/l and also containing an etch equalizing agent at a temperature above about 70 °C. Preferably, the etch solution is regenerated through a crystallization loop.

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