JPS5688828A - Treatment of catalyst composition - Google Patents

Treatment of catalyst composition

Info

Publication number
JPS5688828A
JPS5688828A JP16509379A JP16509379A JPS5688828A JP S5688828 A JPS5688828 A JP S5688828A JP 16509379 A JP16509379 A JP 16509379A JP 16509379 A JP16509379 A JP 16509379A JP S5688828 A JPS5688828 A JP S5688828A
Authority
JP
Japan
Prior art keywords
catalyst
divanadium pentoxide
vanadium
treated
carrier
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
JP16509379A
Other languages
Japanese (ja)
Other versions
JPS6041611B2 (en
Inventor
Masao Hino
Shigeaki Mitsuoka
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries 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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP54165093A priority Critical patent/JPS6041611B2/en
Publication of JPS5688828A publication Critical patent/JPS5688828A/en
Publication of JPS6041611B2 publication Critical patent/JPS6041611B2/en
Expired 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/584—Recycling of catalysts

Landscapes

  • Catalysts (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)

Abstract

PURPOSE: A used catalyst containing titanium dioxide and divanadium pentoxide is brought into contact with oxalic acid, sulfuric acid and a sodium hydroxide solution to remove and recover the vanadium and enable the reuse of the carrier.
CONSTITUTION: A catalyst containing titanium dioxide, divanadium pentoxide, preferably tungsten sesquioxide that is applied to the catalytic denitrification using ammonia as a reducing agent is treated, after used, with oxalic acid to remove the divanadium pentoxide by extraction according to equations I and II. The oxalic acid remaining in the catalyst is readily decomposed by heating. Or the catalyst is treated with sulfuric acid and the vanadium is extracted according to equation III. The extract is oxidized with sodium hypochlorite or the like and adjusted in pH to give the vanadium in the form of divanadium pentoxide. When the catalyst is treated with a sodium hydroxide solution, the divanadium pentoxide and tungsten sesquioxide shift into the liquid phase according equations IV and V. In any case, titanium dioxide is inert and removed from the carrier by a physical means, thus permitting the recovery of valuable components, treatment of catalyst into a pollution-free form and reuse of the carrier.
COPYRIGHT: (C)1981,JPO&Japio
JP54165093A 1979-12-19 1979-12-19 Method for treating catalyst composition Expired JPS6041611B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54165093A JPS6041611B2 (en) 1979-12-19 1979-12-19 Method for treating catalyst composition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54165093A JPS6041611B2 (en) 1979-12-19 1979-12-19 Method for treating catalyst composition

Publications (2)

Publication Number Publication Date
JPS5688828A true JPS5688828A (en) 1981-07-18
JPS6041611B2 JPS6041611B2 (en) 1985-09-18

Family

ID=15805746

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54165093A Expired JPS6041611B2 (en) 1979-12-19 1979-12-19 Method for treating catalyst composition

Country Status (1)

Country Link
JP (1) JPS6041611B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005028102A1 (en) * 2003-09-18 2005-03-31 Hitachi Zosen Corporation Method of regenerating thermally deteriorated catalyst

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0446084Y2 (en) * 1986-08-13 1992-10-29

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005028102A1 (en) * 2003-09-18 2005-03-31 Hitachi Zosen Corporation Method of regenerating thermally deteriorated catalyst

Also Published As

Publication number Publication date
JPS6041611B2 (en) 1985-09-18

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