GB784229A - Improvements in or relating to a method of regenerating a platinum-alumina catalyst - Google Patents
Improvements in or relating to a method of regenerating a platinum-alumina catalystInfo
- Publication number
- GB784229A GB784229A GB34509/54A GB3450954A GB784229A GB 784229 A GB784229 A GB 784229A GB 34509/54 A GB34509/54 A GB 34509/54A GB 3450954 A GB3450954 A GB 3450954A GB 784229 A GB784229 A GB 784229A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oxygen
- catalyst
- pressure
- gas
- per cent
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/90—Regeneration or reactivation
- B01J23/96—Regeneration or reactivation of catalysts comprising metals, oxides or hydroxides of the noble metals
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Catalysts (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
Non-fluoride-containing platinum-alumina reforming catalyst prepared according to Specification 735,390 is regenerated by burning off carbonaceous material with a mixture of inert gases and not more than 1.5 per cent by volume of free oxygen at 500-930 DEG F. and a pressure not exceeding 500 p.s.i.g. while keeping the water vapour partial pressure of the exit gases below 50 mm. of mercury, then oxidizing the platinum by maintaining the catalyst at 800-950 DEG F. in a dry atmosphere having a partial pressure of free oxygen of 0.2-3 atmospheres for at least 0.5 hour, and reducing the oxidized platinum to the metallic state. The catalyst may be in the form of a fixed, moving, or fluidized bed; with a plurality of reactors, one reactor may be regenerated at a time. After the reforming period the catalyst is cooled and purged of combustible gas, e.g. by reducing the heat to the process and stopping the hydrocarbon feed while continuing to recycle gas; the pressure may then be reduced to a partial vacuum and the catalyst purged with flue gas or other inert gas. The pressure is then increased, e.g. to 100-150 p.s.i.g., and air is added to the inert gas which is dried and recirculated. The temperature and oxygen content of the gas are controlled to give the desired burning temperature. The second oxidation stage may be carried out at 930-950 DEG F. for 5-30 hours; the required oxygen partial pressure is preferably attained by compressing dry air. After completing the oxidation, the catalyst is cooled and reduced with a hydrogen-containing gas, e.g. at 40 p.s.i.g. In examples, catalysts prepared according to Example V of Specification 735,390 are regenerated. The first burning stage is carried out (a) with nitrogen containing 1 or 1.5 per cent oxygen at atmospheric pressure; (b) with nitrogen containing 0.35 per cent oxygen at a total pressure of 400 p.s.i.g.; or (c) with nitrogen containing 0.7 per cent oxygen at 30 p.s.i.g. increasing to 130 p.s.i.g. The second oxidation stage is carried out (a) with undiluted air at atmospheric pressure; (b) with pure dry oxygen at 20 p.s.i.g.; or (c) with air at 130 or 150 p.s.i.g. Reference has been directed by the Comptroller to Specifications 735,145 and 748,777.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US784229XA | 1953-11-30 | 1953-11-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB784229A true GB784229A (en) | 1957-10-09 |
Family
ID=22143923
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB34509/54A Expired GB784229A (en) | 1953-11-30 | 1954-11-29 | Improvements in or relating to a method of regenerating a platinum-alumina catalyst |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE1006562B (en) |
FR (1) | FR1118440A (en) |
GB (1) | GB784229A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5084092A (en) * | 1987-08-21 | 1992-01-28 | The British Petroleum Company P.L.C. | Method of separating metals from catalyst material |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2320273A (en) * | 1940-05-16 | 1943-05-25 | Standard Oil Dev Co | Regeneration of solid contact material |
US2434602A (en) * | 1941-02-12 | 1948-01-13 | Standard Oil Dev Co | Regeneration of solid materials |
US2449622A (en) * | 1943-05-15 | 1948-09-21 | Standard Oil Dev Co | Multiple stage regeneration of spent catalysts |
FR941334A (en) * | 1946-01-30 | 1949-01-07 | Cie Francaise Procedes Houdry | Catalyst regeneration process |
-
1954
- 1954-11-29 FR FR1118440D patent/FR1118440A/en not_active Expired
- 1954-11-29 GB GB34509/54A patent/GB784229A/en not_active Expired
- 1954-11-30 DE DES41763A patent/DE1006562B/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5084092A (en) * | 1987-08-21 | 1992-01-28 | The British Petroleum Company P.L.C. | Method of separating metals from catalyst material |
Also Published As
Publication number | Publication date |
---|---|
DE1006562B (en) | 1957-04-18 |
FR1118440A (en) | 1956-06-06 |
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