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1. (WO1991006343) A METHOD OF REMOVING HEAVY METALS FORM SOIL, SLUDGE, COMPOST AND SIMILAR MATERIALS
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/006343 International Application No.: PCT/DK1990/000283
Publication Date: 16.05.1991 International Filing Date: 07.11.1990
Chapter 2 Demand Filed: 06.06.1991
IPC:
A62D 3/00 (2007.01) ,B09C 1/02 (2006.01) ,C02F 1/68 (2006.01) ,C02F 11/00 (2006.01)
A HUMAN NECESSITIES
62
LIFE-SAVING; FIRE-FIGHTING
D
CHEMICAL 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
3
Processes for making harmful chemical substances harmless, or less harmful, by effecting a chemical change in the substances
B PERFORMING OPERATIONS; TRANSPORTING
09
DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
C
RECLAMATION OF CONTAMINATED SOIL
1
Reclamation of contaminated soil
02
Extraction using liquids, e.g. washing, leaching
C CHEMISTRY; METALLURGY
02
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
F
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
1
Treatment of water, waste water, or sewage
68
by addition of specified substances, e.g. trace elements, for ameliorating potable water
C CHEMISTRY; METALLURGY
02
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
F
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
11
Treatment of sludge; Devices therefor
Applicants:
WRL APS [DK/DK]; Langkær Vænge 9 DK-3500 Værløse, DK (AllExceptUS)
JØRGENSEN, Sven, Erik [DK/DK]; DK (UsOnly)
Inventors:
JØRGENSEN, Sven, Erik; DK
Agent:
LEHMANN & REE; Frederiksberg Alle 26 DK-1820 Frederiksberg C, DK
Priority Data:
5538/8907.11.1989DK
Title (EN) A METHOD OF REMOVING HEAVY METALS FORM SOIL, SLUDGE, COMPOST AND SIMILAR MATERIALS
(FR) PROCEDE D'EXTRACTION DES METAUX LOURDS D'UN SOL, D'UNE BOUE, D'UN COMPOST ET DE MATERIAUX SIMILAIRES
Abstract:
(EN) A method of removing heavy metals from soil, sludge, compost and similar materials comprising treating the heavy metal containing material with an agent forming a complex with heavy metal ions so as to form a product consisting of a solid phase and a liquid phase containing a heavy metal complex, separating off the obtained liquid phase and treating the liquid separated off with an ion exchanger so as to bond heavy metals onto the ion exchanger.
(FR) Le procédé décrit, qui sert à extraire les métaux lourds d'un sol, d'une boue, d'un compost, et de matériaux similaires, consiste à traiter le matériau contenant les métaux lourds avec un agent qui forme un complexe avec les ions de métaux lourds, en vue d'obtenir un produit composé d'une phase solide et d'une phase liquide contenant un complexe de métaux lourds, à séparer la phase liquide ainsi obtenue et à traiter le liquide ainsi séparé avec un échangeur d'ions en vue d'obtenir la liaison des métaux lourds sur l'échangeur d'ions.
Designated States: FI, NO, SU, US
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, NL, SE)
Publication Language: English (EN)
Filing Language: Danish (DA)
Also published as:
EP0500657