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Exhaust Gas Treatment Catalyst Method For Producing Exhaust Gas Treatment Catalyst And Method For Regenerating Exhaust Gas Treatment Catalyst
Abstract: 4Provided is an exhaust gas treatment catalyst provided with a coating layer which contains at least one compound selected from the group consisting of an alkali metal carbonate and an alkaline earth metal carbonate on the surface of a denitration catalyst. In this method for regenerating the exhaust gas treatment catalyst the coating layer of the denitration catalyst to which VOSO has accumulated is removed using an acid and after removing the coating layer the coating layer which contains at least one compound selected from the group consisting of an alkali metal carbonate and an alkaline earth metal carbonate is provided again.
Notices, Deadlines & Correspondence
Patent Information
Applicants
MITSUBISHI HEAVY INDUSTRIES LTD.
Inventors
1. YONEMURA Masanao
2. NOCHI Katsumi
3. KIYOSAWA Masashi
4. DEMOTO Masanori
5. TAKAKURA Kyohei
Claims
1. A method for regenerating an exhaust gas treatment catalyst, in which a coating layer containing at least one selected from the group consisting of alkali metal carbonates and alkaline earth metal carbonates is provided on a surface of a de-NOx catalyst, and VOSO4 is deposited on the coating layer, the method comprising removing only the coating layer of the de-NOx catalyst with an acid.
2. The method for regenerating an exhaust gas treatment catalyst as claimed in claim 1, further comprising, after the removal of the coating layer with the acid, providing again a coating layer containing at least one selected from the group consisting of alkali metal carbonates and alkaline earth metal carbonates.
3. The method for regenerating an exhaust gas treatment catalyst as claimed in claim 2, wherein the coating layer provided again contains calcium carbonate.
4. The method for regenerating an exhaust gas treatment catalyst as claimed in any one of claims 1 to 3, wherein hydrochloric acid is used as the acid.
Specification
I/We claim:
1. A method for regenerating an exhaust gas treatment catalyst, in which a coating layer containing at least one selected from the group consisting of alkali metal carbonates and alkaline earth metal carbonates is provided on a surface of a de-NOx catalyst, and VOSO4 is deposited on the coating layer, the method comprising removing only the coating layer of the de-NOx catalyst with an acid.
2. The method for regenerating an exhaust gas treatment catalyst as claimed in claim 1, further comprising, after the removal of the coating layer with the acid, providing again a coating layer containing at least one selected from the group consisting of alkali metal carbonates and alkaline earth metal carbonates.
3. The method for regenerating an exhaust gas treatment catalyst as claimed in claim 2, wherein the coating layer provided again contains calcium carbonate.
4. The method for regenerating an exhaust gas treatment catalyst as claimed in any one of claims 1 to 3, wherein hydrochloric acid is used as the acid.
Documents
Orders
| Section | Controller | Decision Date |
|---|---|---|
| section 15 | MANMEET KUMAR | 2019-04-05 |
| section 15 | MANMEET KUMAR | 2019-04-05 |
Application Documents
| # | Name | Date |
|---|---|---|
| 1 | 2243-CHENP-2014.pdf | 2014-03-25 |
| 2 | SPEC IN.pdf | 2014-04-02 |
| 3 | GPOA.pdf | 2014-04-02 |
| 4 | FORM 5.pdf | 2014-04-02 |
| 5 | FORM 3.pdf | 2014-04-02 |
| 6 | FIGURES.pdf | 2014-04-02 |
| 7 | PC012141IN-NP_Marked up copy.pdf | 2014-07-11 |
| 8 | PC012141IN-NP_Form 13.pdf | 2014-07-11 |
| 9 | PC012141IN-NP_Clean copy.pdf | 2014-07-11 |
| 10 | 2243-CHENP-2014 FORM-3 05-09-2014.pdf | 2014-09-05 |
| 11 | 2243-CHENP-2014 CORRESPONDENCE OTHERS 05-09-2014.pdf | 2014-09-05 |
| 12 | 2243-CHENP-2014 FORM-1 17-09-2014.pdf | 2014-09-17 |
| 13 | 2243-CHENP-2014 ENGLISH TRANSLATION 17-09-2014.pdf | 2014-09-17 |
| 14 | 2243-CHENP-2014 CORRESPONDENCE OTHERS 17-09-2014.pdf | 2014-09-17 |
| 15 | abstract2243-CHENP-2014.jpg | 2014-11-15 |
| 16 | 2243-CHENP-2014 FORM-13 8-7-2014.pdf | 2015-08-05 |
| 17 | Form 3 [17-06-2016(online)].pdf | 2016-06-17 |
| 18 | Form 3 [22-07-2016(online)].pdf | 2016-07-22 |
| 19 | Form 3 [23-08-2016(online)].pdf | 2016-08-23 |
| 20 | 2243-CHENP-2014-FER.pdf | 2017-10-27 |
| 21 | 2243-CHENP-2014-FER_SER_REPLY [26-03-2018(online)].pdf | 2018-03-26 |
| 22 | 2243-CHENP-2014-DRAWING [26-03-2018(online)].pdf | 2018-03-26 |
| 23 | 2243-CHENP-2014-COMPLETE SPECIFICATION [26-03-2018(online)].pdf | 2018-03-26 |
| 24 | 2243-CHENP-2014-CLAIMS [26-03-2018(online)].pdf | 2018-03-26 |
| 25 | 2243-CHENP-2014-FORM 3 [09-04-2018(online)].pdf | 2018-04-09 |
| 26 | 2243-CHENP-2014-HearingNoticeLetter.pdf | 2019-02-15 |
| 27 | 2243-CHENP-2014-Correspondence to notify the Controller (Mandatory) [18-03-2019(online)].pdf | 2019-03-18 |
| 28 | 2243-CHENP-2014-FORM-26 [20-03-2019(online)].pdf | 2019-03-20 |
| 29 | Correspondence by Agent_Power of Attorney_29-03-2019.pdf | 2019-03-29 |
| 30 | 2243-CHENP-2014-Written submissions and relevant documents (MANDATORY) [02-04-2019(online)].pdf | 2019-04-02 |
| 31 | Marked up Claims_Granted 310945_05-04-2019.pdf | 2019-04-05 |
| 32 | Drawings_Granted 310945_05-04-2019.pdf | 2019-04-05 |
| 33 | Description_Granted 310945_05-04-2019.pdf | 2019-04-05 |
| 34 | Claims_Granted 310945_05-04-2019.pdf | 2019-04-05 |
| 35 | Abstract_Granted 310945_05-04-2019.pdf | 2019-04-05 |
| 36 | 2243-CHENP-2014-PatentCertificate05-04-2019.pdf | 2019-04-05 |
| 37 | 2243-CHENP-2014-IntimationOfGrant05-04-2019.pdf | 2019-04-05 |
| 38 | Correspondence by Agent_Authorisation_10-04-2019.pdf | 2019-04-10 |
| 39 | 2243-CHENP-2014-RELEVANT DOCUMENTS [04-03-2020(online)].pdf | 2020-03-04 |
| 40 | 2243-CHENP-2014-PROOF OF ALTERATION [18-02-2021(online)].pdf | 2021-02-18 |
| 41 | 2243-CHENP-2014-Correspondence, POA And Proof of Alteration_01-03-2021.pdf | 2021-03-01 |
| 42 | 2243-CHENP-2014-RELEVANT DOCUMENTS [10-08-2021(online)].pdf | 2021-08-10 |
| 43 | 2243-CHENP-2014-RELEVANT DOCUMENTS [16-09-2022(online)].pdf | 2022-09-16 |
| 44 | 2243-CHENP-2014-RELEVANT DOCUMENTS [16-09-2023(online)].pdf | 2023-09-16 |
Search Strategy
| 1 | 2243chenp2014searchreport_20-10-2017.pdf |