公开(公告)号：US5641530A

公开(公告)日：1997-06-24

申请号：US565303

申请日：1995-11-27

申请人： T. C. Chen

发明人： T. C. Chen

IPC分类号： A23B4/12 ,  A23B4/24 ,  A23L3/3508 ,  A23L3/358 ,  A23L3/34

CPC分类号： A23B4/24 ,  A23B4/12 ,  A23L3/3508 ,  A23L3/358

摘要： A method of disinfection of foodstuff involving the use of hydrogen peroxide in combination with anti-microbial agents selected from the group consisting of benzoic acid, and phosphoric acid, at low concentration, to substantially reduce the microbial count in food-related application.

摘要翻译： 一种消毒涉及使用过氧化氢的食品与选自苯甲酸和磷酸的低分子量抗微生物剂相结合的食品的消毒方法，以显着降低食品相关应用中的微生物数量。

公开(公告)号：US5486344A

公开(公告)日：1996-01-23

申请号：US895634

申请日：1992-06-09

申请人： John R. Winters ,  John M. Gray ,  Joel D. Tenney

发明人： John R. Winters ,  John M. Gray ,  Joel D. Tenney

IPC分类号： C01B11/02 ,  C25B1/26

CPC分类号： C01B11/026

摘要： The invention relates to a method of producing chlorine dioxide, which method comprises reacting chloric acid with hydrogen peroxide as a reducing agent in such proportions that chlorine dioxide is produced.

摘要翻译： 本发明涉及一种生产二氧化氯的方法，该方法包括以生产二氧化氯的比例使氯酸与过氧化氢作为还原剂反应。

公开(公告)号：US5470480A

公开(公告)日：1995-11-28

申请号：US261707

申请日：1994-06-17

申请人： John M. Gray ,  David C. Lovetro

发明人： John M. Gray ,  David C. Lovetro

IPC分类号： C02F1/30 ,  C02F1/32 ,  C02F1/72 ,  C02F9/00 ,  D21C11/00 ,  C02F1/48

CPC分类号： C02F9/00 ,  D21C11/0021 ,  C02F1/32 ,  C02F1/722 ,  C02F1/725 ,  C02F2103/28 ,  C02F2305/10 ,  Y02P40/44 ,  Y10S210/928

摘要： Waste water effluent streams are treated with hydrogen peroxide and ultraviolet radiation. Hydroxyl ions formed by action of UV on H.sub.2 O.sub.2 reduces BOD, COD, AOX and color in effluent. In the case of pulp mill effluent, some or all of the effluent can then be recycled to the pulp mill.

摘要翻译： 废水流出物用过氧化氢和紫外线照射处理。 通过UV对H2O2的作用形成的羟基离子降低了流出物中的BOD，COD，AOX和颜色。 在纸浆厂流出物的情况下，可以将一些或全部流出物再循环到纸浆厂。

公开(公告)号：US5380517A

公开(公告)日：1995-01-10

申请号：US023561

申请日：1993-02-26

申请人： John C. Sokol

发明人： John C. Sokol

IPC分类号： C01B11/02 ,  C01B11/12

CPC分类号： C01B11/026

摘要： A process for continuously producing chlorine dioxide by reacting an alkali metal chlorate, sulfuric acid or another chlorine free mineral acid and hydrogen peroxide as reducing agent to produce chlorine dioxide in an aqueous reaction medium. In the process chlorine dioxide is generated in at least one reaction step comprising at least one reaction vessel, by feeding alkali metal chlorate, acid, hydrogen peroxide and inert gas to said reaction vessel, in substantial absence of added chloride ions. The aqueous reaction medium in said reaction vessel is maintained at a pressure of from about 400 mm Hg to about 900 mm Hg and at a temperature of from about 35.degree. C. to about 100.degree. C. and at an acidity within a range from about 4 to about 14 N and the chlorate concentration of between about 0.05 moles/1 to saturation. Chlorine dioxide, oxygen and inert gas and the depleted aqueous reaction medium is withdrawn from said reaction zone without substantial crystallization of alkali metal sulfate.

摘要翻译： 一种通过使碱金属氯酸盐，硫酸或其它不含氯的无机酸与过氧化氢作为还原剂反应来连续生产二氧化氯的方法，以在水性反应介质中产生二氧化氯。 在该方法中，在至少一个包含至少一个反应容器的反应步骤中，通过在基本上没有加入的氯离子的情况下，通过将碱金属氯酸盐，酸，过氧化氢和惰性气体加入到所述反应容器中来产生二氧化氯。 所述反应容器中的水性反应介质保持在约400mmHg至约900mm Hg的压力和约35℃至约100℃的温度下，并且在约 4至约14N，氯酸盐浓度为约0.05摩尔/ 1至饱和。 二氧化氯，氧气和惰性气体以及耗尽的水性反应介质从所述反应区域排出而碱金属硫酸盐基本不结晶。

公开(公告)号：US5273733A

公开(公告)日：1993-12-28

申请号：US895720

申请日：1992-06-09

申请人： John R. Winters ,  John M. Gray ,  Joel D. Tenney

发明人： John R. Winters ,  John M. Gray ,  Joel D. Tenney

IPC分类号： C01B11/02 ,  C25B1/26

CPC分类号： C01B11/026

摘要： A process for the production of chlorine dioxide by reacting at least one of chloric acid and an alkali metal chlorate, and hydrogen peroxide as the reducing agent in such proportions that chlorine dioxide is produced in a reaction medium. A mixture comprising chlorine dioxide and oxygen is withdrawn from the reaction medium. Urea and/or one or more phosphonic acid based complexing agents are added to the reaction medium. The stabilizer is added in an amount of 0.01-5 weight % and serves to increase the reaction rate.

摘要翻译： 通过使氯酸和碱金属氯酸盐中的至少一种和作为还原剂的过氧化氢中的至少一种与在反应介质中产生二氧化氯的比例反应来生产二氧化氯的方法。 将包含二氧化氯和氧气的混合物从反应介质中排出。 将尿素和/或一种或多种基于膦酸的络合剂加入到反应介质中。 稳定剂的添加量为0.01-5重量％，用于提高反应速率。

公开(公告)号：US5858322A

公开(公告)日：1999-01-12

申请号：US808753

申请日：1997-02-28

申请人： John M. Gray

发明人： John M. Gray

IPC分类号： C01B11/02

CPC分类号： C01B11/023 ,  C01B11/025

摘要： The invention relates to a process of producing chlorine dioxide comprising the steps: Providing a reactor with an aqueous acidic reaction medium containing alkali metal chlorate and sulfate; reducing chlorate ions in said reaction medium to form chlorine dioxide; maintaining the reaction medium at subatmospheric pressure sufficient to evaporate water and precipitate alkali metal sulfate; withdrawing chlorine dioxide and evaporated water from the reactor; withdrawing reaction medium containing solid alkali metal sulfate from the reactor and separating the solid material from said reaction medium; transferring reaction medium substantially free from solid alkali metal sulfate to an electrochemical cell in which the acidity of said reaction medium is increased and the content of alkali metal ions is decreased; recycling electrochemically acidified reaction medium to the reactor for producing chlorine dioxide; and adding make up alkali metal chlorate and sulfuric acid.

摘要翻译： 本发明涉及一种生产二氧化氯的方法，包括以下步骤：向反应器提供含有碱金属氯酸盐和硫酸盐的酸性反应介质水溶液; 还原所述反应介质中的氯酸根离子形成二氧化氯; 将反应介质保持在低于大气压的压力下，足以蒸发水并沉淀碱金属硫酸盐; 从反应器中取出二氧化氯和蒸发的水; 从反应器中取出含有固体碱金属硫酸盐的反应介质，并将固体物质与所述反应介质分离; 将基本上不含固体碱金属硫酸盐的反应介质转移到其中所述反应介质的酸度增加并且碱金属离子含量降低的电化学电池; 将电化学酸化的反应介质循环到用于生产二氧化氯的反应器中; 并加入碱金属氯酸盐和硫酸。

公开(公告)号：US5523072A

公开(公告)日：1996-06-04

申请号：US329099

申请日：1994-10-25

申请人： Helena Falgen ,  Goran Sundstrom ,  Johan Landfors ,  Maria Norell ,  Roy Hammer-Olsen

发明人： Helena Falgen ,  Goran Sundstrom ,  Johan Landfors ,  Maria Norell ,  Roy Hammer-Olsen

IPC分类号： C01B11/02

CPC分类号： C01B11/025

摘要： Disclosed is a process of producing chlorine dioxide having the steps of providing a reactor with an aqueous acidic reaction medium containing alkali metal chlorate and phosphate; reducing chlorate ions in the reaction medium to form chlorine dioxide; withdrawing chlorine dioxide gas from the reaction medium; withdrawing reaction medium from the reactor and transferring it to an electrochemical cell; treating the reaction medium electrochemically to increase the acidity and decrease the content of alkali metal ions; recycling the acidified reaction medium to the reactor; and adding make up alkali metal chlorate to the reaction medium before or after the electrochemical cell.

摘要翻译： 公开了一种生产二氧化氯的方法，其具有以下步骤：向反应器提供含有碱金属氯酸盐和磷酸盐的酸性反应介质; 减少反应介质中的氯酸根离子形成二氧化氯; 从反应介质中取出二氧化氯气体; 从反应器中取出反应介质并将其转移到电化学电池; 电化学处理反应介质以增加酸度并降低碱金属离子的含量; 将酸化的反应介质再循环到反应器中; 并在电化学电池之前或之后向反应介质中加入碱金属氯酸盐。

公开(公告)号：US5478446A

公开(公告)日：1995-12-26

申请号：US269098

申请日：1994-06-30

申请人： Helena Falgen ,  Goran Sundstrom ,  Johan Landfors

发明人： Helena Falgen ,  Goran Sundstrom ,  Johan Landfors

IPC分类号： C01B11/02 ,  C25B1/26 ,  B01D61/44

CPC分类号： C01B11/026

摘要： The invention relates to a method of producing an acidified aqueous solution containing alkali metal sulfate and chlorate comprising the steps of introducing an aqueous solution containing alkali metal sulfate and chlorate into an electrochemical cell and electrochemically increasing the acidity of said aqueous solution, wherein the current efficiency of the cell is maintained below 70%. The invention also relates to a method of producing chlorine dioxide comprising the steps: Providing a reactor with an aqueous acidic reaction medium containing alkali metal chlorate and sulfate; reducing chlorate ions in said reaction medium to form chlorine dioxide; withdrawing chlorine dioxide gas from the reaction medium; withdrawing reaction medium from the reactor and transferring it to an electrochemical cell substantially without crystallization of sulfate or chlorate; electrochemically acidifying said reaction medium to increase the acidity and to decrease the content of alkali metal ions; recycling acidified reaction medium to the reactor; adding make up alkali metal chlorate to the reaction medium before or after the electrochemical cell; wherein the current efficiency of the electrochemical cell is maintained below about 80%.

摘要翻译： 本发明涉及一种生产含有碱金属硫酸盐和氯酸盐的酸化水溶液的方法，包括以下步骤：将含有碱金属硫酸盐和氯酸盐的水溶液引入电化学电池中，并电化学提高所述水溶液的酸度，其中电流效率 的细胞维持在70％以下。 本发明还涉及一种生产二氧化氯的方法，包括以下步骤：向反应器提供含碱金属氯酸盐和硫酸盐的酸性反应介质水溶液; 还原所述反应介质中的氯酸根离子形成二氧化氯; 从反应介质中取出二氧化氯气体; 从反应器中取出反应介质并将其转移到基本上不结晶硫酸盐或氯酸盐的电化学电池; 电化学酸化所述反应介质以增加酸度并降低碱金属离子的含量; 将酸化反应介质回收到反应器中; 在电化学电池前后，向反应介质中加入碱金属氯酸盐; 其中电化学电池的电流效率保持低于约80％。

公开(公告)号：US5770171A

公开(公告)日：1998-06-23

申请号：US486122

申请日：1990-03-05

申请人： Birgitta Sundblad ,  Anders Oscar Johan Dahl ,  John R. Winters

发明人： Birgitta Sundblad ,  Anders Oscar Johan Dahl ,  John R. Winters

IPC分类号： C01B11/02

CPC分类号： C01B11/023

摘要： A process for production of chlorine dioxide which is substantially free of by product chlorine. Chlorine-dioxide is produced from an alkali metal chlorate, a mineral acid and a reducing agent such as methanol in a reaction medium maintained at an acid normality of less than 9 and with a high chlorate molarity. The process is carried out in the substantial absence of additional chloride ion being fed to the process. It has been found that increasing the chlorate concentration at a given acid normality reduces the amount of chloride in the reaction medium thus reducing the amount of chlorine by-product. The process is carried out in a vessel operated under subatmospheric pressure, whereby water is evaporated and withdrawn together with chlorine dioxide and the alkali metal salt of the mineral acid is crystallized within the reaction vessel and withdrawn therefrom. According to the invention, high production rates with high efficiency of chlorine dioxide can be achieved while producing essentially no chlorine by-product.

摘要翻译： 生产基本上不含氯的二氧化氯的方法。 二氧化氯由碱金属氯酸盐，无机酸和还原剂如甲醇在反应介质中产生，反应介质维持在酸值正常值小于9且氯酸盐摩尔浓度高。 该方法在基本上没有额外的氯离子进料到该方法中进行。 已经发现，以给定的酸正常值提高氯酸盐浓度降低了反应介质中的氯化物的量，从而减少了副产物的量。 该方法在低于大气压下操作的容器中进行，由此与二氧化氯一起蒸发和抽出水，无机酸的碱金属盐在反应容器内结晶并从其中取出。 根据本发明，可以在基本上不产生氯副产物的同时实现二氧化氯效率高的高生产率。

公开(公告)号：US5624545A

公开(公告)日：1997-04-29

申请号：US564183

申请日：1995-12-18

申请人： Johan Landfors ,  Bo H.ang.kansson ,  Maria Norell

发明人： Johan Landfors ,  Bo H.ang.kansson ,  Maria Norell

IPC分类号： C02F1/467 ,  D21C11/00 ,  D21C11/04 ,  C02F1/461

CPC分类号： D21C11/0042 ,  D21C11/0078 ,  D21C11/04 ,  C02F1/4672

摘要： Sulphide-containing white liquor is treated in a continuously operating electrolytic cell having separate anode and cathode compartments separated by a partially permeable barrier. White liquor is introduced into the anode compartment of the cell, and an aqueous solution of alkali metal hydroxide is introduced into the cathode compartment of the cell so that sulphide is oxidized in the anode compartment, while at the same time alkali metal cations are transported through the barrier into the cathode compartment, where water reacts to form hydroxide ions. An electrolytic cell suited for implementing the method is also disclosed.

摘要翻译： PCT No.PCT / SE94 / 00526 Sec。 371 1995年12月18日第 102（e）1995年12月18日，PCT PCT 1994年6月1日PCT公布。 公开号WO95 / 00701 日期1995年1月5日含有硫化物的白液在连续操作的电解池中处理，该电解池具有由部分可渗透屏障隔开的单独的阳极和阴极室。 将白液引入电池的阳极室，将碱金属氢氧化物的水溶液引入电池的阴极室，使得硫化物在阳极室中被氧化，同时碱金属阳离子被输送通过 进入阴极室的障碍物，其中水反应形成氢氧根离子。 还公开了适用于实施该方法的电解池。