GB827079A - Improvements in or relating to the production of alumina base catalysts - Google Patents
Improvements in or relating to the production of alumina base catalystsInfo
- Publication number
- GB827079A GB827079A GB9773/56A GB977356A GB827079A GB 827079 A GB827079 A GB 827079A GB 9773/56 A GB9773/56 A GB 9773/56A GB 977356 A GB977356 A GB 977356A GB 827079 A GB827079 A GB 827079A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alumina
- solution
- mixed
- washing
- aluminium
- 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
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
- B01J23/42—Platinum
-
- 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
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/02—Boron or aluminium; Oxides or hydroxides thereof
- B01J21/04—Alumina
-
- 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
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Catalysts (AREA)
Abstract
In the production of an alumina-base catalyst comprising platinum, rhodium, palladium or iridium according to the parent Specification, the alumina base is prepared by dehydrating an alumina hydrate composition comprising 65-95% of crystalline alumina trihydrates prepared by forming an amorphous alumina hydrogel (e.g. by precipitation with ammonia from aluminium sulphate, nitrate or chloride, or by hydrolysis of aluminium isopropylate at 50-85 DEG F.), washing the hydrogel at 70-120 DEG F. and pH 7-9 and ageing at 70-130 DEG F. and pH 7-9. The composition comprises the crystalline trihydrates Gibbsite, Randomite and Bayerite together with Boehmite and amorphous alumina: if the maximum trihydrate yield is desired washing is conducted at 80-90 DEG F., if the maximum Randomite yield is desired the washing temperature should be 110-120 DEG F. In the example, an aluminium chloride solution is mixed with ammonium hydroxide solution at 80 DEG F., filtered and samples washed at various temperatures. The washed filter cake is reslurried at a pH of 9, stirred for an hour to age, filtered and rewashed at the same temperature. This sequence of steps is repeated and the nature of the samples determined by X-ray analysis. Thereafter a slurry of the alumina is mixed with a solution of chlorplatinic acid solution and subsequently with a hydrogen sulphide solution. The slurry is dried in a forced air oven at 110 DEG C., ground, mixed with a hydrogenated vegetable oil as die lubricant, formed into tablets and the lubricant burnt out in an air/nitrogen atmosphere at 900 DEG F. Thereafter it is calcined in air at 900 DEG F. and treated with hydrogen at the same temperature.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US827079XA | 1955-03-29 | 1955-03-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB827079A true GB827079A (en) | 1960-02-03 |
Family
ID=22172910
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9773/56A Expired GB827079A (en) | 1955-03-29 | 1956-03-28 | Improvements in or relating to the production of alumina base catalysts |
Country Status (2)
Country | Link |
---|---|
GB (1) | GB827079A (en) |
NL (1) | NL101812C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4082699A (en) * | 1974-12-20 | 1978-04-04 | Prototech Company | Method of preparing catalytic structures from colloidal platinum compounds and such catalytic structures |
USRE33149E (en) * | 1971-06-16 | 1990-01-16 | Prototech Company | Finely particulated colloidal platinum compound and sol for producing the same and method of preparation of fuel cell electrodes and the like employing the same |
-
0
- NL NL101812D patent/NL101812C/xx active
-
1956
- 1956-03-28 GB GB9773/56A patent/GB827079A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE33149E (en) * | 1971-06-16 | 1990-01-16 | Prototech Company | Finely particulated colloidal platinum compound and sol for producing the same and method of preparation of fuel cell electrodes and the like employing the same |
US4082699A (en) * | 1974-12-20 | 1978-04-04 | Prototech Company | Method of preparing catalytic structures from colloidal platinum compounds and such catalytic structures |
Also Published As
Publication number | Publication date |
---|---|
NL101812C (en) |
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