Processing

Please wait...

Settings

Settings

Goto Application

1. KR1020070061793 - METHOD OF EXTRACTING HEXAVALENT CHROMIUM

Office
Republic of Korea
Application Number 1020077003173
Application Date 09.02.2007
Publication Number 1020070061793
Publication Date 14.06.2007
Grant Number 1008758230000
Grant Date 26.12.2008
Publication Kind B1
IPC
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 into something useful or harmless
A62D 3/00
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
Applicants YOSHIDA HIDEO
요시다 히데오
Inventors YOSHIDA HIDEO
요시다 히데오
SHINDO MORIHISA
신도 모리히사
Agents 서종완
Priority Data 2005144858 18.05.2005 JP
Title
(EN) METHOD OF EXTRACTING HEXAVALENT CHROMIUM
(KO) 6가크롬의 추출방법
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.

© KIPO & WIPO 2007


(KO) [과제]