Patent US3853786A successfully refreshed from Google Patents.
US3853786A
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Supported catalysts for the production of 4-methyl-pentene from propylene
Assignee: Societa Italiana Resine SpA SIR
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Filing: 1973-08-06
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Granted: 1974-12-10
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Expires: 1993-08-06
Abstract
Abstract Supported catalysts containing alkali metal for the production of 4-methyl-1-pentene from propylene and a process for their production by heating previously dried support particles in an inert gas atmosphere for at least about 30 minutes at a temperature of at least about 150*C, mixing the support particles obtained with a compound of a transition metal that is thermally decomposable at below about 400*C and an alkali metal and heating the mixture obtained for about 1 to 120 minutes in an inert gas stream to about 150* to 500*C.
Inventors
- 👤 L Forni
- 👤 R Invernizzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:46
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/78; B01J23/16; B01J23/24; B01J23/26; B01J23/30; B01J23/38; B01J23/54; C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/24; C07C2521/00; C07C2521/06; C07C2521/08; C07C2521/16; C07C2521/18; C07C2523/00; C07C2523/02; C07C2523/04; C07C2523/16; C07C2523/24; C07C2523/26; C07C2523/30; C07C2523/38; C07C2523/40; C07C2523/44; C07C2523/48; C07C2523/52; C07C2523/70; C07C2523/74; C07C2523/75; C07C2523/755; C07C2527/00; C07C2527/02; C07C2527/053; C07C2527/06; C07C2527/08; C07C2527/20; C07C2527/232; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
184 words
PROCESS FOR THE PRODUCTION OF A SUPPORTED CATALYST CONTAINING ALKALI METAL FOR DIMERIZATION OF PROPYLENE TO 4-METHYL1-PENETENE, CHARACTERIZED IN THAT A. PREVIOUSLY DRIED SUPPORT PARTICLES ARE HEATED IN AN INERT GAS ATOMOSPHERE FOR AT LEAST ABOUT 30 MINUTES TO A TEMPERATURE OF AT LEAST ABOUT 150*C, B. THE SUPPORT PARTICLES OBTAINED IN ACCORDANCE WITH A) ARE MIXED WITH A COMPOUND OF A TRANSISTION METAL THAT IS THER MALLY DECOMPOSABLE AT BELOS ABOUT 400*C, SAID COMPOUND BEING ONE OF GOLD, NICKEL, CHROMIUM, PALLADIUM. COBALT OR TUNGSTEN, AND AN ALKALI METAL IN A QUANTITY SUCH THAT THE TOTAL WEIGHT OF ALKALI METAL AND OF THE TRANSISTION METAL COMPOUND, BOTH CALCULATED AS THE WEIGHT OF METAL IS ABOUTT 1 TO 80 WT. PERCENT BASED ON THE WEIGHT OF THE SUPPORT, THE ATOMIC RATION OF ALKALI METAL TO TRANSITION METAL BEING IN THE RANGE BETWEEN ABOUT 50 : 1 AND 1 : 1, AND C. THE MIXTURE OBTAINED IN ACCORDANCE WITH B) IA HEATED FOR ABOUT 1 TO 120 MINUTES TO ABOUT 150 TO 500*C IN AN INERT GAS STREAM WITH STIRRING TO DECOMPOSE THE TRANSITION METAL COMPOUND.
Claim 2
Dependent Claim
184 words
PROCESS FOR THE PRODUCTION OF A SUPPORTED CATALYST CONTAINING ALKALI METAL FOR DIMERIZATION OF PROPYLENE TO 4-METHYL1-PENETENE, CHARACTERIZED IN THAT A. PREVIOUSLY DRIED SUPPORT PARTICLES ARE HEATED IN AN INERT GAS ATOMOSPHERE FOR AT LEAST ABOUT 30 MINUTES TO A TEMPERATURE OF AT LEAST ABOUT 150*C, B. THE SUPPORT PARTICLES OBTAINED IN ACCORDANCE WITH A) ARE MIXED WITH A COMPOUND OF A TRANSISTION METAL THAT IS THER MALLY DECOMPOSABLE AT BELOS ABOUT 400*C, SAID COMPOUND BEING ONE OF GOLD, NICKEL, CHROMIUM, PALLADIUM. COBALT OR TUNGSTEN, AND AN ALKALI METAL IN A QUANTITY SUCH THAT THE TOTAL WEIGHT OF ALKALI METAL AND OF THE TRANSISTION METAL COMPOUND, BOTH CALCULATED AS THE WEIGHT OF METAL IS ABOUTT 1 TO 80 WT. PERCENT BASED ON THE WEIGHT OF THE SUPPORT, THE ATOMIC RATION OF ALKALI METAL TO TRANSITION METAL BEING IN THE RANGE BETWEEN ABOUT 50 : 1 AND 1 : 1, AND C. THE MIXTURE OBTAINED IN ACCORDANCE WITH B) IA HEATED FOR ABOUT 1 TO 120 MINUTES TO ABOUT 150 TO 500*C IN AN INERT GAS STREAM WITH STIRRING TO DECOMPOSE THE TRANSITION METAL COMPOUND.
Claim 3
Dependent Claim
29 words
Process in accordance with claim 1, characterized in that graphite, potassium carbonate, an alkali metal silicate, an alkali metal halide, magnesium sulphate, or talc is used as the support.
Claim 4
Dependent Claim
18 words
Process in accordance with claim 1, characterized in that sodium or potassium is used as the alkali metal.
Claim 5
Dependent Claim
28 words
Process in accordance with claim 1, characterized in that the transition metal compound and the alkali metal are used in an atomic ratio of about 1:15 to 1:5.
Claim 6
Dependent Claim
39 words
Process in accordance with claim 1, characterized in that the mixture of the support, the alkali metal, and the thermally decomposable transition metal compound is heated for about 10 to 90 minutes to temperatures of about 220* to 350*C.
Claim 7
Dependent Claim
33 words
Process in accordance with claim 1, characterized in that in step a) support particles are used which have been dried for at least about 5 hours at temperatures of about 100* to 150*C.
Claim 8
Dependent Claim
32 words
Process in accordance with claim 1, characterized in that in step a) the heating of the dried support particles is carried out for about 2 hours at a temperature of about 250*C.
Claim 9
Dependent Claim
69 words
Process in accordance with claim 1, characterized in that the support is potassium carbonate which, after predrying and heat treatment, is mixed with the alkali metal and the transition metal compound in a quantity such that the total weight of the alkali metal and the transition metal compound, both calculated as the weight of metal, is about 1 to 30 wt. percent based on the weight of the support.
Claim 10
Dependent Claim
16 words
Process in accordance with claim 2, characterized in that potassium carbonate is used as the support.
Claim 11
Dependent Claim
29 words
Process in accordance with claim 6, characterized in that in step a) support particles are used which have been dried for at least about 12 hrs. at said temperatures.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |