DE3427550A1 - Process for activating and stabilising EDTA solutions - Google Patents

Process for activating and stabilising EDTA solutions

Info

Publication number
DE3427550A1
DE3427550A1 DE19843427550 DE3427550A DE3427550A1 DE 3427550 A1 DE3427550 A1 DE 3427550A1 DE 19843427550 DE19843427550 DE 19843427550 DE 3427550 A DE3427550 A DE 3427550A DE 3427550 A1 DE3427550 A1 DE 3427550A1
Authority
DE
Germany
Prior art keywords
reducing agent
edta solutions
activating
added
stabilising
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
DE19843427550
Other languages
German (de)
Other versions
DE3427550C2 (en
Inventor
Heribert Dipl.-Ing. 4390 Gladbeck Dewert
Heinrich Ing.(grad.) 4600 Dortmund Gresch
Heinz Dipl.-Ing. Hölter
Heinrich Dipl.-Ing. 4390 Gladbeck Igelbüscher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE3427550A priority Critical patent/DE3427550C2/en
Priority to AU38857/85A priority patent/AU569775B2/en
Priority to PCT/EP1985/000018 priority patent/WO1985003238A2/en
Priority to EP85900664A priority patent/EP0168453A1/en
Priority to US06/781,235 priority patent/US4670234A/en
Priority to IT19231/85A priority patent/IT1199650B/en
Priority to DD85272832A priority patent/DD233949A5/en
Publication of DE3427550A1 publication Critical patent/DE3427550A1/en
Application granted granted Critical
Publication of DE3427550C2 publication Critical patent/DE3427550C2/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Treating Waste Gases (AREA)

Abstract

It is known to absorb by a wet method SO2 and NOX downstream of fossil fuel power stations. The EDTA solutions used for this purpose are not stable so that the NOX absorption is greatly reduced during the scrubbing process. In order to activate the exhausted solution and to stabilise it, it is proposed according to the invention to add to it alkali metal bisulphide. In addition, a further reducing agent can be added. The reducing agent used can be ascorbic acid.

Description

Beschreibung und Erläuterung zur PatentanmeldungDescription and explanation of the patent application

Verfahren zur Aktivierung und Stabilisierung von EDTA Lösungen Es ist bekannt, SO, und NO naßtechnisch zu absorx bieren, vorzugsweise hinter fossilen Kraftwerken.Procedure for activating and stabilizing EDTA solutions Es it is known to absorb SO and NO using wet technology, preferably behind fossil fuels Power plants.

Es ist bekannt, daß EDTh-Lösungen zur NOx-Minderung, die Eisen Komplexe enthalten, nicht stabil sind.It is known that EDTh solutions for NOx reduction, the iron complexes are not stable.

Es ist nicht zu verhindern, daß Eisen-Il zu Eisen-Ill oxidiert und infolgedessen die NOx-Absorption beim Waschprozess stark gemindert wird.It cannot be prevented that iron-II is oxidized to iron-III and as a result, the NOx absorption during the washing process is greatly reduced.

Es wurde gefunden, daß die verbrauchte Lösung aktiviert und stabilisiert werden kann durch Zugabe von Alkalibisulfit und/oder einem weiteren Reduktionsmittel, vorzugsweise Ascorbinsäure.It has been found that the used solution activates and stabilizes can be achieved by adding alkali bisulfite and / or another reducing agent, preferably ascorbic acid.

PatentansprücheClaims

Claims (1)

Patentansprüche Anspruch 1 Verfahren zur Aktivierung von inaktiven EDTA -Lösungen, dadurch gekennzeichnet, daß der Lösung Alkalibisulfit zugesetzt wird.Claims Claim 1 method for activating inactive EDTA solutions, characterized in that alkali bisulfite is added to the solution will. Anspruch 2 Verfahren nach Anspruch 1 dadurch gekennzeichnet, daß dem Verfahren außer Alkalibisulfit zusätzlich ein weiteres Reduktionsmittel zugegeben wird.Claim 2 The method according to claim 1, characterized in that the Process in addition to alkali bisulfite, a further reducing agent is added will. Anspruch 3 Verfahren nach Anspruch 1 - 2 dadurch gekennzeichnet, daß als Reduktionsmittel Ascorbinsäure Anwendung findet.Claim 3 Method according to Claim 1 - 2, characterized in that ascorbic acid is used as a reducing agent. Anspruch 4 Verfahren nach Anspruch 1 - 3 dadurch gekennzeichnet, daß der Flüssigkeit entsprechend der Aufgabenstellung Alkalibisulfit plus einem Reduktionsmittel, vorzugsweise Ascorbinsäure und/ oder Natriumdithionit zur Stabilisierung und Reaktivierung zugesetzt wird.Claim 4, method according to claims 1-3, characterized in that the liquid according to the task alkali bisulfite plus a reducing agent, preferably ascorbic acid and / or sodium dithionite for stabilization and reactivation is added.
DE3427550A 1984-01-25 1984-07-26 Procedure for activating inactive EDTA solutions Expired DE3427550C2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
DE3427550A DE3427550C2 (en) 1984-07-26 1984-07-26 Procedure for activating inactive EDTA solutions
AU38857/85A AU569775B2 (en) 1984-01-25 1985-01-23 Stripping nox and sox from flue gases discharged from combustion plants
PCT/EP1985/000018 WO1985003238A2 (en) 1984-01-25 1985-01-23 Process for stripping nitrogen oxides and sulphur oxides as well as optionally other noxious elements of flue gas from combustion plants
EP85900664A EP0168453A1 (en) 1984-01-25 1985-01-23 Process for stripping nitrogen oxides and sulphur oxides as well as optionally other noxious elements of flue gas from combustion plants
US06/781,235 US4670234A (en) 1984-01-25 1985-01-23 Process for stripping nitrogen oxides and sulphur oxides as well as optionally other noxious elements of flue gas from combustion plants
IT19231/85A IT1199650B (en) 1984-01-25 1985-01-25 PROCEDURE FOR THE SEPARATION OF NITROGEN OXIDES AND SULFUR OXIDS AND EVENTUALLY OF OTHER HARMFUL SUBSTANCES FROM THE COMBUSTION GASES OF COMBUSTION PLANTS
DD85272832A DD233949A5 (en) 1984-03-15 1985-01-29 METHOD FOR THE SEPARATION OF NITROGEN OXIDES AND SULFUR OXIDES AND, WHERE APPROPRIATE, OTHER CONTAMINANTS FROM THE FLUE GASES OF COMBUSTION FACILITIES

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3427550A DE3427550C2 (en) 1984-07-26 1984-07-26 Procedure for activating inactive EDTA solutions

Publications (2)

Publication Number Publication Date
DE3427550A1 true DE3427550A1 (en) 1986-02-06
DE3427550C2 DE3427550C2 (en) 1986-07-03

Family

ID=6241619

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3427550A Expired DE3427550C2 (en) 1984-01-25 1984-07-26 Procedure for activating inactive EDTA solutions

Country Status (1)

Country Link
DE (1) DE3427550C2 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2460231A1 (en) * 1973-12-27 1975-07-03 Chisso Eng Co Ltd PROCESS FOR THE REMOVAL OF NITROGEN OXIDES FROM INDUSTRIAL EXHAUST GASES AND SUITABLE AQUATIC TREATMENT SOLUTIONS
DE2548346A1 (en) * 1974-11-06 1976-05-13 Kureha Chemical Ind Co Ltd Sulphur dioxide removal from combustion gases - by absorption in soln. contg. alkali salt or org. acid and manganous or cupric
DE2619145A1 (en) * 1975-05-06 1976-11-25 Fuji Kasui Eng Co Ltd PROCESS FOR SEPARATING NITROGEN OXYDES AND SIMULTANEOUSLY SEPARATING NITROGEN OXYDE AND SULFUR OXYDE FROM EXHAUST GASES

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2460231A1 (en) * 1973-12-27 1975-07-03 Chisso Eng Co Ltd PROCESS FOR THE REMOVAL OF NITROGEN OXIDES FROM INDUSTRIAL EXHAUST GASES AND SUITABLE AQUATIC TREATMENT SOLUTIONS
DE2548346A1 (en) * 1974-11-06 1976-05-13 Kureha Chemical Ind Co Ltd Sulphur dioxide removal from combustion gases - by absorption in soln. contg. alkali salt or org. acid and manganous or cupric
DE2619145A1 (en) * 1975-05-06 1976-11-25 Fuji Kasui Eng Co Ltd PROCESS FOR SEPARATING NITROGEN OXYDES AND SIMULTANEOUSLY SEPARATING NITROGEN OXYDE AND SULFUR OXYDE FROM EXHAUST GASES

Also Published As

Publication number Publication date
DE3427550C2 (en) 1986-07-03

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Legal Events

Date Code Title Description
OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
OP8 Request for examination as to paragraph 44 patent law
D2 Grant after examination
8363 Opposition against the patent
8330 Complete disclaimer