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1.发明授权METATHESIS OF ACIDIC BY-PRODUCT OF CHLORINE DIOXIDE GENERATING PROCESS 失效复分解ACID-PRODUCT产生二氧化氯的PROCEDURE学报
公开(公告)号：EP0646094B1
公开(公告)日：1998-09-02
申请号：EP92908337.6
申请日：1992-04-21
CPC分类号： C01D5/00 , C01B11/023
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公开(公告)号：EP0535113A1
公开(公告)日：1993-04-07
申请号：EP91911994.0
申请日：1991-06-20
CPC分类号： C01B11/023
摘要： On produit le dioxyde de chlore de manière très économique en réduisant du chlorate de sodium à l'aide de méthanol dans un milieu réactionnel acide et aqueux et à une normalité d'acidité totale inférieure à 7, le milieu réactionnel étant à son point d'ébullition pendant qu'on lui applique une pression subatmosphérique, et présentant une concentration de chlore d'au moins environ 2,0 molaire. Sous ces conditions, la susceptibilité de la réaction aux arrêts épisodiques de la production de chlore sans apport d'ions de chlorure est éliminée. On peut ainsi éliminer la teneur en chlore de la solution aqueuse de dioxyde de chlore provenant de cette source.
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公开(公告)号：EP0357198B1
公开(公告)日：1992-12-09
申请号：EP89307033.4
申请日：1989-07-11
IPC分类号： C01B11/02
CPC分类号： C01B11/023
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公开(公告)号：EP0365113A1
公开(公告)日：1990-04-25
申请号：EP89307032.6
申请日：1989-07-11
IPC分类号： C25B1/26
CPC分类号： B01D61/44 , B01D61/445 , C25B1/26
摘要： Chloric acid is produced in an electrolytic-electrodialytic process in which chlorate ions from a sodium chlorate solution are transferred through an anion-exchange membrane to combine with electrolytically-produced hydrogen ions in a compartment of a cell, from which the resulting chloric acid is recovered. The sodium ions are transferred through a cation-exchange membrane to combine with electrolytically-produced hydroxyl ions in another compartment of the cell, from which the resulting sodium hydroxide is recovered.
摘要翻译： 在电解 - 电渗析方法中产生氯酸，其中氯酸钠溶液的氯酸根离子通过阴离子交换膜转移到电池室中的电解产生的氢离子，从中回收得到的氯酸 。 将钠离子转移通过阳离子交换膜与在电池的另一个隔室中的电解产生的羟基离子结合，从中回收所得的氢氧化钠。
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公开(公告)号：EP0357198A1
公开(公告)日：1990-03-07
申请号：EP89307033.4
申请日：1989-07-11
IPC分类号： C01B11/02
CPC分类号： C01B11/023
摘要： Chlorine dioxide is produced from sodium chlorate, sulphuric acid and methanol at the boiling point of the reaction medium under a subatmospheric pressure applied to a reaction zone. High purity of chlorine dioxide production is retained while the proportion of acid sodium sulphate in the product is decreased by effecting the reaction at high acidity in a physically-separate reaction zone from which the reaction products discharge into a mass of recycling sodium chlorate solution.
摘要翻译： 二氧化氯由氯酸钠，硫酸和甲醇在反应介质的沸点下，在施加到反应区的低于大气压下产生。 保留高纯度的二氧化氯生产，同时通过在物理上分离的反应区中进行高酸度的反应来降低产品中酸性硫酸钠的比例，反应产物从该反应区中排出到大量的回收氯酸钠溶液中。
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6.发明公开Combined process for production of chlorine dioxide and sodium hydroxide 失效Kombiniertes Verfahren zur Erzeugung von Chlordioxid und Natriumhydroxid。
公开(公告)号：EP0353367A1
公开(公告)日：1990-02-07
申请号：EP88311307.8
申请日：1988-11-29
发明人： Twardowski, Zbigniew
CPC分类号： C01B11/025 , C25B1/46
摘要： A hydrochloric acid-based chlorine dioxide generating process is' integrated with an electrolytic process for sodium hydroxide production. Generator liquor in the form of a sodium chloride-enriched solution from the chlorine dioxide generator is passed to the central compartment of a three-compartment cell. Hydrogen ions formed in the anode compartment of the three-compartment cell migrate through a cation-exchange membrane to the central compartment to form hydrochloric acid with the sodium chloride solution while sodium ions migrate through a further cation-exchange membrane to form sodium hydroxide with hydroxyl ions produced in the cathode compartment of the three-compartment cell. The acidified generator liquor containing the hydrochloric acid formed in the central compartment is forwarded to the chlorine dioxide generator to provide half the acid requirement therefor.
摘要翻译： 盐酸二氧化氯生成方法与氢氧化钠生产的电解方法相结合。 来自二氧化氯发生器的富含氯化钠的溶液形式的发生剂液体被传送到三室电池的中央室。 在三室细胞的阳极室中形成的氢离子通过阳离子交换膜迁移到中央室以与氯化钠溶液形成盐酸，而钠离子通过另外的阳离子交换膜迁移以形成氢氧化钠与羟基 在三室电池的阴极室中产生的离子。 含有在中央室中形成的盐酸的酸化发生剂液体被送往二氧化氯发生器以提供一半的酸需求量。
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公开(公告)号：EP0644852B1
公开(公告)日：1996-07-03
申请号：EP93912503.5
申请日：1993-06-02
IPC分类号： C01B11/02
CPC分类号： C01B11/026
摘要： Chlorine dioxide is continuously produced at high efficiency in a single vessel process by reduction of chlorate ions with hydrogen peroxide in an aqueous acidic medium maintained at its boiling point under a subatmospheric pressure. The hydrogen peroxide is pre-mixed with at least a portion of the aqueous chlorate solution feed or the sulfuric acid feed or a mixture thereof. By pre-mixing the hydrogen peroxide feed, the occasional decomposition of hydrogen peroxide and the resulting foaming of the generator liquor is eliminated.
摘要翻译： 通过在酸性介质中在低于大气压下保持沸点的酸性介质中用过氧化氢还原氯酸根离子，在单容器过程中以高效率连续生产二氧化氯。 过氧化氢与至少一部分氯酸盐水溶液进料或硫酸进料或其混合物预先混合。 通过预先混合过氧化氢进料，消除了过氧化氢的偶然分解和所产生的发生剂液体的发泡。
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公开(公告)号：EP0532535B1
公开(公告)日：1996-02-14
申请号：EP91909631.3
申请日：1991-05-23
发明人： COWLEY, Gerald , LIPSZTAJN, Marek , TWARDOWSKI, Zbigniew , SWINDELLS, Richard , BECHBERGER, Edward, J.
CPC分类号： C25B1/14 , B01D61/44 , B01D61/445 , C01B11/023 , C25B1/16 , C25B1/26 , H01M8/00 , Y02E60/366 , Y02P70/56
摘要： The formation of sodium sulfate by-product in sulfuric acid-based chlorine dioxide generating processes is decreased and preferably eliminated entirely, by effecting electrochemical treatment of sodium ion-containing feed materials for the generator to remove sodium ions and to add hydrogen ions. Sodium hydroxide may be produced as a by-product. The process is generally applicable to the electrochemical treatment of alkali metal chlorates, alkali metal sulfates and mixtures thereof to produce acidified solutions useful in providing chlorate ion-containing feeds to such chlorine dioxide generating processes or for other purposes.
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公开(公告)号：EP0535113B1
公开(公告)日：1995-09-27
申请号：EP91911994.1
申请日：1991-06-20
IPC分类号： C01B11/02
CPC分类号： C01B11/023
摘要： Chlorine dioxide is produced at high efficiency by reduction of sodium chlorate with methanol in an aqueous acid reaction medium at a total acid normality below 7 with the reaction medium being at its boiling point while a subatmospheric pressure is applied thereto and having a chlorate concentration of at least about 2.0 molar. By employing such conditions, the tendency is eliminated for the reaction to be subject to white-outs in the absence of added chloride ion. In this way, the chlorine content of product aqueous chlorine dioxide solution arising from this source is eliminated.
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公开(公告)号：EP0644852A1
公开(公告)日：1995-03-29
申请号：EP93912503.0
申请日：1993-06-02
IPC分类号： C01B11
CPC分类号： C01B11/026
摘要： Chlorine dioxide is continuously produced at high efficiency in a single vessel process by reduction of chlorate ions with hydrogen peroxide in an aqueous acidic medium maintained at its boiling point under a subatmospheric pressure. The hydrogen peroxide is pre-mixed with at least a portion of the aqueous chlorate solution feed or the sulfuric acid feed or a mixture thereof. By pre-mixing the hydrogen peroxide feed, the occasional decomposition of hydrogen peroxide and the resulting foaming of the generator liquor is eliminated.
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