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1.发明授权
公开(公告)号：EP0954632B1
公开(公告)日：2002-09-25
申请号：EP98900833.9
申请日：1998-01-23
发明人： PALEOLOGOU, Michael , THOMPSON, Rokhsareh , BERRY, Richard, McKinnon , BROWN, Craig, J. , SHEEDY, Michael
IPC分类号： D21C11/00
CPC分类号： D21C11/005 , B01J43/00 , D21C11/04 , Y10S210/928
摘要： A process using an amphoteric ion-exchange resin, also known as a "snake-cage polyelectrolyte" resin, contained in an ion retardation unit (9) separates kraft white liquor (8) into sulphide-rich (12) and caustic-rich (10) components. The sulphide-rich component (12) can be used in the initial stage of pulping (1), pretreatment of wood chips prior to pulping, or it can be used to make polysulphide-rich liquor. The caustic-rich component (10) can be used in the final delignification phase, in place of sodium hydroxide or white liquor in oxygen delignification, pH adjustment and flue gas scrubbing. The same system can be used to separate green (6) and polysulphide liquors (8a) into sulphide-rich and sulphide-poor components, and to remove sulphide from other mill caustic streams contaminated with sulphide.
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2.发明公开PROCESS AND APPARATUS FOR PURIFICATION OF CONTAMINATED ACIDS 失效VERFAHREN UND VORRICHTUNG ZUR REINIGUNG VON VERUNREINIGTENSÄUREN
公开(公告)号：EP0805713A1
公开(公告)日：1997-11-12
申请号：EP96900223.0
申请日：1996-01-15
申请人： ECO-TEC LIMITED
发明人： BROWN, Craig, J.
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。 原料溶液可以先送到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进料的酸终产物和剔除金属盐溶液。 或者，可以在NFU中处理高金属盐溶液，并将其渗透物作为洗脱液再循环至ASU。 在替代配置中，进料首先输送到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的溶液。
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公开(公告)号：EP0565544B1
公开(公告)日：1994-09-21
申请号：EP92901288.8
申请日：1991-12-20
申请人： ECO-TEC LIMITED
发明人： HUNTER, Robert F. , HOHN, Phillip
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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公开(公告)号：EP0307161A2
公开(公告)日：1989-03-15
申请号：EP88308221.6
申请日：1988-09-06
申请人： ECO-TEC LIMITED
发明人： Brown, Craig J.
摘要： A process for electroplating metals in an electroplating bath having an anode and a cathode. The cathode is formed by a workpiece to be plated and the anode includes soluble material in the form of the metal to be plated and insoluble material in a proportion selected so that the anode efficiency equals the cathode efficiency. This avoids metal salt build-up in the bath. Metal salt solution carried out of the bath with the workpiece is recovered and recycled to the bath, avoiding loss of metal to the system and waste disposal problems.
摘要翻译： 在具有阳极和阴极的电镀浴中电镀金属的方法。 阴极由要被电镀的工件形成，并且阳极包括待镀金属形式的可溶性材料和选定的比例的阳离子效率等于阴极效率的不溶性材料。 这样可以避免金属盐积聚在浴缸中。 金属盐溶液与工件一起回收并回收到浴中，避免了金属对系统的损失和废物处理问题。
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公开(公告)号：EP0805713B1
公开(公告)日：2000-04-05
申请号：EP96900223.7
申请日：1996-01-15
申请人： ECO-TEC LIMITED
发明人： BROWN, Craig, J.
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.
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6.发明公开A PROCESS FOR THE SEPARATION OF SULPHIDES FROM PULPING LIQUORS USING AMPHOTERIC RESINS 失效进行分离的方法从KOCH碱硫化物使用两性RESINS
公开(公告)号：EP0954632A1
公开(公告)日：1999-11-10
申请号：EP98900833.0
申请日：1998-01-23
发明人： PALEOLOGOU, Michael , THOMPSON, Rokhsareh , BERRY, Richard, McKinnon , BROWN, Craig, J. , SHEEDY, Michael
CPC分类号： D21C11/005 , B01J43/00 , D21C11/04 , Y10S210/928
摘要： A process using an amphoteric ion-exchange resin, also known as a 'snake-cage polyelectrolyte' resin, contained in an ion retardation unit (9) separates kraft white liquor (8) into sulphide-rich (12) and caustic-rich (10) components. The sulphide-rich component (12) can be used in the initial stage of pulping (1), pretreatment of wood chips prior to pulping, or it can be used to make polysulphide-rich liquor. The caustic-rich component (10) can be used in the final delignification phase, in place of sodium hydroxide or white liquor in oxygen delignification, pH adjustment and flue gas scrubbing. The same system can be used to separate green (6) and polysulphide liquors (8a) into sulphide-rich and sulphide-poor components, and to remove sulphide from other mill caustic streams contaminated with sulphide.
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公开(公告)号：EP0714458B1
公开(公告)日：1997-06-25
申请号：EP94923611.1
申请日：1994-08-02
申请人： ECO-TEC LIMITED
IPC分类号： C23G1/36
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.
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公开(公告)号：EP0714458A1
公开(公告)日：1996-06-05
申请号：EP94923611.0
申请日：1994-08-02
申请人： ECO-TEC LIMITED
IPC分类号： C23G1
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.
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公开(公告)号：EP0201640A1
公开(公告)日：1986-11-20
申请号：EP85304056.6
申请日：1985-06-07
申请人： ECO-TEC LIMITED
IPC分类号： B01D15/08
CPC分类号： B01J47/02 , B01D15/14 , C02F2303/16
摘要： An apparatus and process for treating a fluid by passing the fluid through a bed of particulate material such as an ion exchange resin capable of taking up from the fluid a component to be removed therefrom. Substantially uniform fluid flow distribution across the cross-sectional area of the bed is achieved by employing resins of fine particle size which are maintained in an overpacked condition.
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10.发明公开TREATMENT OF CHLORINE DIOXIDE GENERATOR EFFLUENT AND FEED STREAMS WITH FIXED-RESIN BED 失效CHLORDIORIDGENERATOR外流，入口用硬床树脂处理
公开(公告)号：EP0946408A1
公开(公告)日：1999-10-06
申请号：EP97943702.0
申请日：1997-10-09
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.
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