NL1021307C2 - Removal of heavy metals from industrial effluent, by heating with elementary sulfur and filtering insoluble metal sulfides after cooling - Google Patents

Removal of heavy metals from industrial effluent, by heating with elementary sulfur and filtering insoluble metal sulfides after cooling Download PDF

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Publication number
NL1021307C2
NL1021307C2 NL1021307A NL1021307A NL1021307C2 NL 1021307 C2 NL1021307 C2 NL 1021307C2 NL 1021307 A NL1021307 A NL 1021307A NL 1021307 A NL1021307 A NL 1021307A NL 1021307 C2 NL1021307 C2 NL 1021307C2
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NL
Netherlands
Prior art keywords
sulfur
cooling
metal sulfides
insoluble metal
heating
Prior art date
Application number
NL1021307A
Other languages
Dutch (nl)
Inventor
Roelof Dirk Schuiling
Peter Van Der Gaag
Original Assignee
Geochem Res B V
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Geochem Res B V filed Critical Geochem Res B V
Priority to NL1021307A priority Critical patent/NL1021307C2/en
Application granted granted Critical
Publication of NL1021307C2 publication Critical patent/NL1021307C2/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
    • B01J20/0262—Compounds of O, S, Se, Te
    • B01J20/0266—Compounds of S
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D15/00—Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/02—Temperature

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Removal Of Specific Substances (AREA)

Abstract

A mixture of elementary sulfur and effluent is heated to a temperature above the melting point of sulfur and after cooling the insoluble metal sulfides and sulfur are separated by filtration. A method for removing heavy metal compounds from industrial effluent comprises mixing the effluent with finely distributed elementary sulfur, heating to a temperature above the melting point of sulfur over a period of at least 10 minutes and filtering the insoluble metal sulfides and sulfur after cooling.

Description

-1--1-

Werkwijze voor het verwijderen van verbindingen van zware metalen uit industriële effluentenMethod for removing heavy metal compounds from industrial effluents

Industriële effluenten bevatten in veel gevallen zware metalen, zoals bijvoorbeeld cobalt, 05 molybdeen en kwiK* in de vorm van in water opgeloste verbindingen. Deze verbindingen zijn vaak giftig of schadelijk voor het milieu. Daarbij zijn. de metalen op zichzelf waardevol bij industriële toepassingen.Industrial effluents in many cases contain heavy metals such as, for example, cobalt, molybdenum and mercury in the form of water-dissolved compounds. These compounds are often toxic or harmful to the environment. Be there. the metals themselves valuable in industrial applications.

De uitvinding betreft een methode waarbij de zware metaalverbindingen in contact met gesmolten elementaire zwavel gebracht worden waarbij de verbindingen omgezet worden in 10 vrijwel onoplosbare metaalsulfiden.The invention relates to a method in which the heavy metal compounds are brought into contact with molten elemental sulfur, the compounds being converted into practically insoluble metal sulfides.

In een uitvoering van de uitvinding wordt het effluent gemengd met fijn verdeeld zwavel en in een pijpreactor (plug flow reactor) verhit tot 150 graden Celsius met een verblijftijd van 30 minuten. Na afkoeling wordt het mengsel gefiltreerd. Een effluent bevatte 1507 microgram Cobalt per liter. Na behandeling volgens de uitvinding was het cobaltgehalte minder dan 1 15 microgram per liter.In an embodiment of the invention, the effluent is mixed with finely divided sulfur and heated in a pipe reactor (plug flow reactor) to 150 degrees Celsius with a residence time of 30 minutes. After cooling, the mixture is filtered. An effluent contained 1507 micrograms of Cobalt per liter. After treatment according to the invention, the cobalt content was less than 1 microgram per liter.

Een effluent van een hydrothermale metaalwinning in een autoclaaf bevatte ruim 500 microgram molybdeen per liter. Na toevoeging van fijn verdeeld elementair zwavel werd het molybdeengehalte verlaagd tot enkele tientallen microgrammen per liter. Hierdoor verbeterde de elektrolytische verwerking van de vloeistof.An hydrothermal metal effluent in an autoclave contained more than 500 micrograms of molybdenum per liter. After the addition of finely divided elemental sulfur, the molybdenum content was reduced to a few tens of micrograms per liter. This improved the electrolytic processing of the liquid.

20 Het reinigingsproces van effluent kan met succes in geroerde batchreactoren, autoclaven of pijpreactoren worden uitgevoerd.The effluent cleaning process can be successfully performed in stirred batch reactors, autoclaves or pipe reactors.

'1021307«"1021307"

Claims (5)

1. Werkwijze voor het verwijderen van verbindingen van zware metalen uit industriële effluenten met het kenmerk dat de effluenten vermengd worden met fijn verdeeld elementair zwavel en 05 vervolgens op een temperatuur gebracht worden boven het smeltpunt van zwavel met een reactie tijd van minimaal 10 minuten waarbij na afkoeling de onoplosbare metaalsulfiden en zwavel afgefiltreerd worden.Process for removing heavy metal compounds from industrial effluents, characterized in that the effluents are mixed with finely divided elemental sulfur and subsequently brought to a temperature above the melting point of sulfur with a reaction time of at least 10 minutes, after which After cooling, the insoluble metal sulfides and sulfur are filtered off. 2. Werkwijze volgens conclusie 1 met het kenmerk dat de reactie uitgevoerd wordt in een io autoclaaf bij een temperatuur van meer dan 113 graden Celsius.Method according to claim 1, characterized in that the reaction is carried out in an autoclave at a temperature of more than 113 degrees Celsius. 3. Werkwijze volgens conclusie 1 met het kenmerk dat de reactie wordt uitgevoerd in een pijpreactor (plug flow reactor)Method according to claim 1, characterized in that the reaction is carried out in a pipe reactor (plug flow reactor) 4. Werkwijze volgens conclusie 1 met het kenmerk dat de reactie wordt uitgevoerd in een geroerde batchreactor.Method according to claim 1, characterized in that the reaction is carried out in a stirred batch reactor. 5. Werkwijze volgens een der conclusies 1, 2, 3 en 4 met het kenmerk dat de met filtratie gewonnen metaalsulfiden gebruikt worden om de metalen terug te winnen * * * * 1021307·Method according to one of claims 1, 2, 3 and 4, characterized in that the metal sulfides recovered by filtration are used to recover the metals * * * * 1021307 ·
NL1021307A 2002-08-20 2002-08-20 Removal of heavy metals from industrial effluent, by heating with elementary sulfur and filtering insoluble metal sulfides after cooling NL1021307C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL1021307A NL1021307C2 (en) 2002-08-20 2002-08-20 Removal of heavy metals from industrial effluent, by heating with elementary sulfur and filtering insoluble metal sulfides after cooling

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1021307 2002-08-20
NL1021307A NL1021307C2 (en) 2002-08-20 2002-08-20 Removal of heavy metals from industrial effluent, by heating with elementary sulfur and filtering insoluble metal sulfides after cooling

Publications (1)

Publication Number Publication Date
NL1021307C2 true NL1021307C2 (en) 2004-02-24

Family

ID=32171666

Family Applications (1)

Application Number Title Priority Date Filing Date
NL1021307A NL1021307C2 (en) 2002-08-20 2002-08-20 Removal of heavy metals from industrial effluent, by heating with elementary sulfur and filtering insoluble metal sulfides after cooling

Country Status (1)

Country Link
NL (1) NL1021307C2 (en)

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Effective date: 20070301