JPS5688828A - Treatment of catalyst composition - Google Patents
Treatment of catalyst compositionInfo
- 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
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
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0446084Y2 (en) * | 1986-08-13 | 1992-10-29 |
-
1979
- 1979-12-19 JP JP54165093A patent/JPS6041611B2/en not_active Expired
Cited By (1)
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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