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公开(公告)号：JP2003105570A
公开(公告)日：2003-04-09
申请号：JP2001299126
申请日：2001-09-28
发明人： HIRATA SUEHIDE
摘要： PROBLEM TO BE SOLVED: To provide a method of recovering noble metal ions in noble metal ion-containing water in which iodine, etc., coexist. SOLUTION: The noble metal ions are reduced and captured by using a carrier formed by selectively reducing iodine, etc., then carrying and supporting an anthrahydroquinone compound as a redox reaction reagent on a porous carrier.
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公开(公告)号：JP2002326821A
公开(公告)日：2002-11-12
申请号：JP2001133580
申请日：2001-04-27
发明人： SAKURAI TATSUYA , HIRATA SUEHIDE , HONDO HATSUO
摘要： PROBLEM TO BE SOLVED: To recover palladium from a solution acidified by hydrochloric acid which contains a palladium ion stabilized by a divalent tin ion. SOLUTION: Tin and palladium are recovered as a coprecipitate by mixing the solution acidified by hydrochloric acid which contains palladium and the divalent tin ion together with water. Furthermore, palladium is seized by a metallic ion treating agent after the coprecipitate is dissolved in the solution acidified by hydrochloric acid again and treated by oxidation.
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公开(公告)号：JP2002080917A
公开(公告)日：2002-03-22
申请号：JP2000278693
申请日：2000-09-08
发明人： KUSABE KOJI , AKABOSHI SHINJI , ISHIGURO HITOSHI
IPC分类号： C02F1/28 , B01J20/26 , C02F1/42 , C02F1/70 , C22B3/24 , C22B3/42 , C22B3/44 , C22B7/00 , C22B11/00
摘要： PROBLEM TO BE SOLVED: To efficiently recover valuable metals without requiring equipment and labor for recovering valuable metals in factories being the sources of discharging valuable metal-containing water by reducing the cost for transporting the valuable metal-containing water and to increase the economical value of dilute valuable metal-containing water. SOLUTION: The volume of vessels for storing valuable metal-containing water arranged at a plurality of factories discharging valuable metal-containing water is controlled to a level in accordance with the quantity to be discharged, valuable metal-containing water is collected using the vessels, and valuable metals are recovered in a centralized way.
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公开(公告)号：JP2000247612A
公开(公告)日：2000-09-12
申请号：JP5103399
申请日：1999-02-26
发明人： SHIMODAIRA TETSUJI , ANDO TATSUYA , TANAKA JUNJI , WATABE KEIGO , NANRI YASUTOKU
摘要： PROBLEM TO BE SOLVED: To remarkably reduce the by-production of the sulfuric acid ions and to make production with low electric power consumption by introducing a solution containing sulfide ions into the anode chamber of an electrolytic cell arranged to have a gap in at least part between a porous anode having a specific apparent volume and a diaphragm and obtaining polysulfide ions by electrolytic oxidation. SOLUTION: This process for producing the polysulfide consists in introducing the solution containing the sulfide ions into the anode chamber of the electrolytic cell having the anode chamber where the porous anode is disposed, a cathode chamber where a cathode is disposed and the diaphragm which delineates the anode chamber and the cathode chamber and obtaining the polysulfide ions by electrolytic oxidation. The porous anode is disposed to have the gap in at least part between itself and the diaphragm and the apparent volume of the porous anode is specified to 60 to 99% of the volume of the anode chamber. The porous anode is a physically continuous three-dimensional anastomosis and its surface consists of nickel or nickel alloy contg. >=50 wt.% nickel.
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公开(公告)号：JP2000167594A
公开(公告)日：2000-06-20
申请号：JP34619398
申请日：1998-12-04
摘要： PROBLEM TO BE SOLVED: To efficiently suppress the formation of sulfide in a process for removing sulfide in sludge separated as the withdrawn sludge of a primary sedimentation tank and a post-treatment process of sludge by adding a nitrate to the withdrawn sludge of the primary sedimentation tank in a sewage treatment equipment. SOLUTION: Sulfide is formed by the action of sulfate reducing bacteria under an anaerobic atmosphere like the bottom part of a primary sedimentation tank or a treatment process for the withdrawn sludge of the primary sedimentation tank in a sewage treatment equipment and, when hydrogen sulfide is volatilized into the atmosphere, a malodor problem or a corrosion problem of the equipment is generated. Then, by adding an alkali metal nitrate or an alkaline earth metal nitrate to the withdrawn sludge of the primary sedimentation tank, the formation of sulfide is rapidly suppressed without increasing nitrogen load in the sewage treatment equipment. By adding an anthraquinone compd. along with a nitrate, the suppressing effect on the formation of sulfide can be continued and, as this anthraquinone compd., anthraquinone, anthrahydroquinone and an alkyl substituted compd. or hidride thereof are designated.
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公开(公告)号：JP2000034202A
公开(公告)日：2000-02-02
申请号：JP20067698
申请日：1998-07-15
摘要： PROBLEM TO BE SOLVED: To inhibit the sulfide formation caused by sulfate-reducing bacteria by adding an anthraquinone compound into a river system containing sulfate- reducing bacteria and restricting the pH value of the above river system within a specific range. SOLUTION: The inhibition of sulfide formation is carried out by adding an anthraquinone compound as an aqueous slurry containing a surfactant into a river system containing sulfate-reducing bacteria (e.g. Desulfobacter postgatei or the like) and adjusting the above river system to the range of pH 7-9 by the use of an aqueous solution or the like of sodium hydroxide or the like. By adjusting the pH value, an anthraquinone compound of comparatively big particle diameter (e.g. 0.1-27 μm or the like) can be used. Further, it is favorable that the concentration of anthraquinone in the above aqueous slurry is usually 50 wt.% or less. In addition, the anthraquinone compound is preferably added in amounts of 0.1 mg/l or more in the case of drain or the like containing a few microbial cell body number of the objective sulfate-reducing bacteria and 1 mg/l or more in the case of the river system, e.g. sludge or the like, containing a lot of microbial cell body number of the sulfate-reducing bacteria.
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公开(公告)号：JP2000033383A
公开(公告)日：2000-02-02
申请号：JP20067598
申请日：1998-07-15
摘要： PROBLEM TO BE SOLVED: To quickly inhibit the formation of sulfides by adding a proteolytic component together with an anthraquinone compd. to a water system. SOLUTION: An anthraquinone compd. is added to a water system in which sulfate reduction bacteria are present and which is sewage, sludge, waste water or the like. The anthraquinone compd. is added as aq. slurry of the compd. contg. an added surfactant. A proteolytic component is added in order to accelerate the lowering the oxidation-reduction potential(ORP) of the water system up to the ORP of the added anthraquinone compd. Thereby, the formation of sulfides can be inhibited.
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公开(公告)号：JPH1157746A
公开(公告)日：1999-03-02
申请号：JP24019497
申请日：1997-08-22
发明人： WATANABE JIYUNYA , YANO KATSUHIKO , KUSABE KOJI , SAKURAI TATSUYA
摘要： PROBLEM TO BE SOLVED: To reduce the addition of chemicals, to easily regulate the pH and temp. and to decrease the amt. of sludge generated by adding a Cu(II) salt to a liq. contg. selenium compds. or their salts, then adding an alkali to form a floc and separating the floc. SOLUTION: When a selenium-contg. waste water such as the service water and waste water related to the environmental protection field of chemical industry, etc., is treated, a copper (II) salt and then an alkali are added to form a floc, and the floc is separated. Inorg. acid salts such as copper (II) sulfate and nitrate and org. acid salts such as acetates are selected as the copper (II) salt, however a soluble salt such as copper (II) sulfate and copper (II) chloride is preferably used. One or more equimolar amt. of the copper (II) salt is preferably added to the selenium compd. in the treated liq. The hydroxides of alkali metal and alkaline-earth metal, the weak acid salt of alkali metal, etc., are used as the alkali to be added.
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公开(公告)号：JPH1157464A
公开(公告)日：1999-03-02
申请号：JP24019597
申请日：1997-08-22
发明人： WATANABE JIYUNYA , YANO KATSUHIKO , KUSABE KOJI , SAKURAI TATSUYA
摘要： PROBLEM TO BE SOLVED: To provide a method for removing a selenium compound by using a metal ion treatment agent which can adsorb and remove a selenium compound through a simple process as a method for removing selenium from an aqueous solution such as wastewater containing a selenium compound. SOLUTION: To remove selenium from a solution containing selenium compounds or their salts, the solution containing selenium compounds or their salts is brought into contact with a metal ion treatment agent obtained by bringing a polymer adsorbent bearing an anthrahydroquinone type compound and copper(II) ion into contact with each other. The metal ion treatment agent is obtained by bringing a polymer adsorbent bearing an anthrahydroquinone type compound and copper(II) ion into contact with each other. Anthrahydroquinone, 1,4-dihydro-9,10-dihydroxanthraquinone, 1,2,3,4- tetrahydroquinone; alkylanthrahydroquinone or the like, e.g. methylanthrahydroquinone, ethylanthrahydroquinone or the like are examples of the anthrahydroquinone type compound.
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公开(公告)号：JPH10121158A
公开(公告)日：1998-05-12
申请号：JP6782697
申请日：1997-03-21
发明人： HIRATA SUEHIDE , KUSABE KOJI , NAKAMURA HIROSHI , FUJIWARA KIKUO
摘要： PROBLEM TO BE SOLVED: To selectively and efficiently recover a noble metal from an aq. soln. contg. noble metallic cyano-complex ions by treating the aq. soln. with a metallic ion treating agent contg. an anthrahydroquinone compd. in the presence of a compd. reactive with cyanide ions. SOLUTION: An aq. soln. contg. noble metallic cyano-complex ions is treated with a metallic ion treating agent obtd. by carrying an anthrahydroquinone compd. on a carbonaceous porous carrier in the presence of a compd. having reactivity with cyanide ions and capable of suppressing the action of the ions, e.g. a water-soluble metallic compd. of Zn, Ni or Co capable of forming a cyano- complex or water-soluble aldehyde such as formaldehyde. The noble metallic cyano-complex ions are, e.g. dicyanoaurous complex ions, tetracyanoauric complex ions or dicyanoargentous complex ions. The anthrahydroquinone compd. is, e.g. 9,10-dihydroxyanthracene, 1,4-dihydro-9,10-dihydroxyanthracene or one of their substitution products.
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