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1. (WO1992010263) METHOD AND APPARATUS TO DETOXIFY AQUEOUS BASED HAZARDOUS WASTE
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1992/010263 International Application No.: PCT/US1991/008612
Publication Date: 25.06.1992 International Filing Date: 18.11.1991
Chapter 2 Demand Filed: 22.06.1992
IPC:
B01D 11/04 (2006.01) ,B01D 61/16 (2006.01) ,C02F 1/26 (2006.01) ,C02F 1/28 (2006.01) ,C02F 1/38 (2006.01) ,C02F 1/44 (2006.01) ,C02F 1/68 (2006.01) ,C02F 9/00 (2006.01) ,C22B 3/20 (2006.01) ,C22B 3/26 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
11
Solvent extraction
04
of solutions which are liquid
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
61
Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
14
Ultrafiltration; Microfiltration
16
Feed pretreatment
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
26
by extraction
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
28
by sorption
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
38
by centrifugal separation
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
44
by dialysis, osmosis or reverse osmosis
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
9
Multistep treatment of water, waste water or sewage
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
B
PRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
3
Extraction of metal compounds from ores or concentrates by wet processes
20
Treatment or purification of solutions, e.g. obtained by leaching
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
B
PRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
3
Extraction of metal compounds from ores or concentrates by wet processes
20
Treatment or purification of solutions, e.g. obtained by leaching
26
by liquid-liquid extraction using organic compounds
Applicants:
CLEAN HARBORS, INC. [US/US]; 1200 Crown Colony Drive Quincy, MA 02269-9137, US
Inventors:
SCHULTHEIS, Alexander; US
LANDRIGAN, Mark; US
LAKHANI, Arun; US
Agent:
SCHURGIN, Stanley, M. ; Weingarten, Schurgin, Gagnebin & Hayes Ten Post Office Square Boston, MA 02109, US
Priority Data:
623,60407.12.1990US
Title (EN) METHOD AND APPARATUS TO DETOXIFY AQUEOUS BASED HAZARDOUS WASTE
(FR) PROCEDE ET APPAREIL POUR DETOXIQUER DES DECHETS DANGEREUX A BASE D'EAU
Abstract:
(EN) A process and apparatus is provided in which aqueous based wastes are processed (100, 200, 300) to remove solids (100, 102, 110, 112), decant phase separated product (200, 202), optimize chemically for solvent extraction (208, 304), remove toxic metals (309, 302) and organics via solvent extraction (208, 304) and remove residual metals and organics via flocculation/filtration (308) and adsorption with activated carbon (316). The system employs chemical optimization of the aqueous waste stream by the addition of reagents (114, 116) to optimize subsequent treatment and the addition of chelating agents (114, 116) which inhibit the precipitation of heavy metals so that they are maintained in the waste stream as an organometallic complex which can be extracted via carbon dioxide extraction (200, 202, 214) and concentrated for recovery (104), recycling (104, 206, 320) or final disposal (104, 206, 306).
(FR) L'invention se rapporte à un procédé et à un appareil dans lesquels on soumet des déchets à base d'eau à un traitement (100, 200, 300) pour les débarrasser des particules solides (100, 102, 110, 112), pour décanter le produit séparé en phases (200, 202), pour obtenir une optimisation chimique pour l'extraction par solvant (208, 304), pour les débarrasser des particules organiques et métalliques toxiques (309, 302) par extraction par solvant (208, 304) et pour les débarrasser des résidus métalliques et organiques par floculation/filtrage (308) et adsorption au moyen de charbon actif (316). Ce système utilise l'optimisation chimique du courant de déchets aqueux par l'addition de réactifs (114, 116) en vue d'optimiser le traitement ultérieur et par l'addition d'agents de chélation (114, 116) qui empêchent la précipitation des métaux lourds pour que ceux-ci soient maintenus dans le courant de déchets sous la forme d'un complexe organométallique, lequel peut être extrait par extraction au dioxyde de carbone (200, 202, 214) et concentré pour être ensuite récupéré (104), recyclé (104, 206, 320) ou définitivement mis au rebut (104, 206, 306).
Designated States: CA
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0560877CA2097520