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1. WO2006123489 - METHOD OF EXTRACTING HEXAVALENT CHROMIUM

Publication Number WO/2006/123489
Publication Date 23.11.2006
International Application No. PCT/JP2006/307708
International Filing Date 12.04.2006
IPC
B09B 3/00 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
BDISPOSAL OF SOLID WASTE
3Destroying solid waste or transforming solid waste into something useful or harmless
A62D 3/00 2007.1
AHUMAN NECESSITIES
62LIFE-SAVING; FIRE-FIGHTING
DCHEMICAL MEANS FOR EXTINGUISHING FIRES; PROCESSES FOR MAKING HARMFUL CHEMICAL SUBSTANCES HARMLESS, OR LESS HARMFUL, BY EFFECTING A CHEMICAL CHANGE; COMPOSITION OF MATERIALS FOR COVERINGS OR CLOTHING FOR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; COMPOSITION OF MATERIALS FOR TRANSPARENT PARTS OF GAS-MASKS, RESPIRATORS, BREATHING BAGS OR HELMETS; COMPOSITION OF CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
3Processes for making harmful chemical substances harmless, or less harmful, by effecting a chemical change in the substances
CPC
A62D 3/00
AHUMAN NECESSITIES
62LIFE-SAVING; FIRE-FIGHTING
DCHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
3Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
B09B 3/00
BPERFORMING OPERATIONS; TRANSPORTING
09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
BDISPOSAL OF SOLID WASTE
3Destroying solid waste or transforming solid waste ; or contaminated solids; into something useful or harmless
C01G 37/00
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
GCOMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
37Compounds of chromium
C01G 37/003
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
GCOMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
37Compounds of chromium
003Preparation involving a liquid-liquid extraction, an adsorption or an ion-exchange
C22B 34/32
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION AND REFINING OF METALS
34Obtaining refractory metals
30Obtaining chromium, molybdenum or tungsten
32Obtaining chromium
C22B 5/00
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION AND REFINING OF METALS
5General methods of reducing to metals
Applicants
  • 吉田 英夫 YOSHIDA, Hideo [JP]/[JP]
  • 新藤 守久 SHINDO, Morihisa [JP]/[JP] (UsOnly)
Inventors
  • 吉田 英夫 YOSHIDA, Hideo
  • 新藤 守久 SHINDO, Morihisa
Agents
  • 千明 武 CHIGIRA, Takeshi
Priority Data
2005-14485818.05.2005JP
Publication Language Japanese (ja)
Filing Language Japanese (JA)
Designated States
Title
(EN) METHOD OF EXTRACTING HEXAVALENT CHROMIUM
(FR) PROCEDE D'EXTRACTION DU CHROME HEXAVALENT
(JA) 六価クロムの抽出方法
Abstract
(EN) [PROBLEMS] To provide a method of hexavalent-chromium extraction by which hexavalent chromium, which is harmful, remaining on or in a chromium deposit or chromate coating film can be extracted without fail at low cost without the need of a special expensive apparatus to thereby prevent hexavalent chromium from dissolving away from the material treated. Thus, parts having residual hexavalent chromium can be made to be safely used or discarded and can be prevented from causing environmental pollution or influencing the human body. [MEANS FOR SOLVING PROBLEMS] The method, which is for extracting hexavalent chromium remaining in a material (3) to be treated, comprises bringing the material (3) having a coating film containing residual hexavalent chromium into contact with a reducing agent (2) in a liquid or finely particulate form to thereby extract hexavalent chromium from the coating film.
(FR) L'invention a pour objet un procédé d'extraction du chrome hexavalent par lequel on peut extraire le chrome hexavalent, lequel est nocif, restant sur ou dans un film de revêtement en dépôt de chrome ou en chromate, de façon fiable et à faible coût, sans avoir besoin d'un appareil spécial onéreux, pour de cette manière empêcher le chrome hexavalent de partir du matériau traité par dissolution. Ainsi, il est possible d'utiliser ou de jeter en toute sécurité des éléments ayant du chrome hexavalent résiduel et on peut éviter qu'ils provoquent une pollution de l'environnement ou qu'ils aient une incidence sur le corps humain. Le procédé, lequel sert à extraire le chrome hexavalent restant sur un matériau (3) à traiter, consiste à mettre le matériau (3) ayant un film de revêtement contenant du chrome hexavalent résiduel en contact avec un agent réducteur (2) sous forme liquide ou sous forme de fines particules pour de cette manière extraire le chrome hexavalent du film de revêtement.
(JA) 【課題】特殊かつ高価な設備を要することなく、クロムめっきまたはクロメ-ト皮膜の表面または内部に残存する有害な六価クロムを確実かつ安価に抽出し、被処理素材からの六価クロムの溶出を阻止して、六価クロム残存部品の安全な使用や廃棄を図れ、環境汚染や人体への影響を防止できる、六価クロムの抽出方法を提供すること。 【解決手段】被処理素材3に残存する六価クロムの抽出方法であること。  前記六価クロムが残存する皮膜を有する被処理素材3を液状または微粒子状の還元剤2に接触させる。  前記皮膜から六価クロムを抽出させる。
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