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1. WO1996009902 - WASTE TREATMENT CHEMICAL AND WASTE DISPOSAL METHOD

Publication Number WO/1996/009902
Publication Date 04.04.1996
International Application No. PCT/JP1995/001966
International Filing Date 28.09.1995
Chapter 2 Demand Filed 10.04.1996
IPC
A62D 3/00 2007.01
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 2101/08
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
2101Harmful chemical substances made harmless, or less harmful, by effecting chemical change
08Toxic combustion residues, e.g. toxic substances contained in fly ash from waste incineration
A62D 2101/43
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
2101Harmful chemical substances made harmless, or less harmful, by effecting chemical change
40Inorganic substances
43containing heavy metals, in the bonded or free state
A62D 3/33
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
30by reacting with chemical agents
33by chemical fixing the harmful substance, e.g. by chelation or complexation
Applicants
  • KANEGAFUCHI KAGAKU KOGYO KABUSHIKI KAISHA [JP]/[JP] (AllExceptUS)
  • KUROMATSU, Hidekazu [JP]/[JP] (UsOnly)
  • YOSHIDA, Toru [JP]/[JP] (UsOnly)
  • NOMURA, Takuji [JP]/[JP] (UsOnly)
  • UEKITA, Masakazu [JP]/[JP] (UsOnly)
Inventors
  • KUROMATSU, Hidekazu
  • YOSHIDA, Toru
  • NOMURA, Takuji
  • UEKITA, Masakazu
Agents
  • YANAGINO, Takao
Priority Data
6/23495929.09.1994JP
6/26867401.11.1994JP
6/27132404.11.1994JP
7/14282809.06.1995JP
7/14575313.06.1995JP
7/14591213.06.1995JP
7/14932116.06.1995JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) WASTE TREATMENT CHEMICAL AND WASTE DISPOSAL METHOD
(FR) PRODUIT CHEMIQUE DE TRAITEMENT DE DECHETS ET PROCEDE DE MISE AU REBUT DESDITS DECHETS
Abstract
(EN)
A waste treatment chemical comprising an aqueous solution of water glass and improved in the effect of preventing leaching of hazardous metals, particularly lead contained in the fly ash discharged from garbage incineration facilities. The above improvement is attained by adding to the water glass an additive A (e.g., acid, alcohol, polyvalent metal salt, polyhydric alcohol ester, carbonate, intramolecular ester, dibasic acid ester or dialdehyde), an additive B (e.g., phosphate, carbonate, sulfate, carboxylate or hydroxide of potassium, sodium or ammonium; phosphonate of potassium or sodium; or organic chelating agent having a carboxyl group -COOX (wherein X represents hydrogen, potassium or sodium) or a dithiocarbamate group >NCSSY (wherein Y represents hydrogen, potassium or sodium)), an additive C (coagulant), and/or an additive D (e.g., a monovalent metallic or ammonium salt which does not yield water-insoluble or difficulty soluble compounds upon reaction with calcium ion). It is possible to improve the stability of the chemical as a one-pack solution and the handleability thereof by further adding thereto an additive (E) (e.g., gluconate salt, tartrate salt, benzoate salt, ligninsulfonate salt, polysaccharide, or base composed of monovalent cation and hydroxide ion).
(FR)
Produit chimique de traitement de déchets qui comprend une solution aqueuse de verre soluble et dont l'effet destiné à empêcher le lessivage de métaux dangereux est amélioré, en particulier de plomb contenu dans le suies produites par les installations d'incinération de déchets. On parvient à l'amélioration susmentionnée en ajoutant au verre soluble un additif A (par ex., acide, alcool, sel de métal polyvalent, ester d'alcool polyvalent, carbonate, ester intramoléculaire, ester d'acide bivalent ou dialdéhyde), un additif B (par ex., phosphate, carbonate, sulfate, carboxylate ou hydroxyde de potassium, sodium ou ammonium; phosphonate de potassium ou sodium; ou agent chélateur organique doté d'un groupe carboxyle -COOX (où X représente hydrogène, potassium ou sodium) ou un groupe dithiocarbamate >NCSSY ( où Y représente hydrogène, potassium ou sodium), un additif C (coagulant et/ou un additif D (par ex., un sel métallique monovalent ou d'ammonium qui ne produit pas de composés insolubles dans l'eau ou difficilement solubles dans l'eau lors de la réaction avec des ions de calcium). Il est possible d'améliorer la stabilité du produit chimique en tant que solution unique et la maniabilité dudit produit en ajoutant encore un additif E (par ex., sel de gluconate, sel de tartrate, sel de benzoate, sel de ligninesulfonate, polysaccharide ou base composée de cations monovalents et d'ions hydroxyde).
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