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JPS5544337A - Copper removing method in simultaneous desulfurization- denitration process of waste gas - Google Patents

Copper removing method in simultaneous desulfurization- denitration process of waste gas

Info

Publication number
JPS5544337A
JPS5544337A JP11745278A JP11745278A JPS5544337A JP S5544337 A JPS5544337 A JP S5544337A JP 11745278 A JP11745278 A JP 11745278A JP 11745278 A JP11745278 A JP 11745278A JP S5544337 A JPS5544337 A JP S5544337A
Authority
JP
Japan
Prior art keywords
copper
thiosulfate
waste gas
absorption liquid
heated
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.)
Pending
Application number
JP11745278A
Other languages
Japanese (ja)
Inventor
Jun Hasegawa
Ataru Wakabayashi
Kunihiko Yokota
Hiroshi Sato
Kazuyuki Shiga
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.)
Chiyoda Corp
Original Assignee
Chiyoda Chemical Engineering and Construction Co Ltd
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 Chiyoda Chemical Engineering and Construction Co Ltd filed Critical Chiyoda Chemical Engineering and Construction Co Ltd
Priority to JP11745278A priority Critical patent/JPS5544337A/en
Publication of JPS5544337A publication Critical patent/JPS5544337A/en
Pending legal-status Critical Current

Links

Classifications

    • 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

  • Treating Waste Gases (AREA)

Abstract

PURPOSE: To remove copper efficiently and prevent occurrence of trouble in wet oxidation process, ammonium sulfate production process, etc., by heating the absorption liquid when removing NOX and SOX contained in waste gas simultaneously, by using the absorption liquid containing copper compound in aqueous solution of thiosulfate.
CONSTITUTION: NOX and SOX are removed from the waste gas, by using aqueous solution of thiosulfate, such as coke oven gas desulfurization waste liquid, containing copper compound, e.g. cupric sulfate, cupric chloride, by usually 100W500ppm approximately as Cu. Afterwards, the absorption liquid is heated to 100W200°C, preferably 150W200°C to decompose thiosulfate, thereby producing H2S. As a result, the copper occurring in the form of copper-thiosulfate complex is transformed into sulfide, which is then settled and removed. The reaction time is, when heated to 150°C, 20W60 minutes. The separated copper sulfide may be, when oxidized with oxidizing agent such as hydrogen peroxide, may be recovered as copper sulfate to be re-used.
COPYRIGHT: (C)1980,JPO&Japio
JP11745278A 1978-09-26 1978-09-26 Copper removing method in simultaneous desulfurization- denitration process of waste gas Pending JPS5544337A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11745278A JPS5544337A (en) 1978-09-26 1978-09-26 Copper removing method in simultaneous desulfurization- denitration process of waste gas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11745278A JPS5544337A (en) 1978-09-26 1978-09-26 Copper removing method in simultaneous desulfurization- denitration process of waste gas

Publications (1)

Publication Number Publication Date
JPS5544337A true JPS5544337A (en) 1980-03-28

Family

ID=14711998

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11745278A Pending JPS5544337A (en) 1978-09-26 1978-09-26 Copper removing method in simultaneous desulfurization- denitration process of waste gas

Country Status (1)

Country Link
JP (1) JPS5544337A (en)

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