US3764635A
Expired / Lapsed
US
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Process for disproportionating the olefins
Assignee: SnamProgetti SpA
•
Filing: 1971-04-14
•
Granted: 1973-10-09
•
Expires: 1991-04-14
Abstract
Abstract A process for disproportionating olefins is disclosed which employs a catalyst which includes tungsten and bismuth in the form of oxides or other forms.
Inventors
- 👤 V Fattore
- 👤 M Mazzei
- 👤 B Notari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:27
CPC Classifications
C; C07; C07C; C07C6/00; C07C6/02; C07C6/04; B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/31; C07C2521/00; C07C2521/02; C07C2521/04; C07C2521/06; C07C2521/08; C07C2521/12; C07C2523/00; C07C2523/16; C07C2523/24; C07C2523/31
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
8 words
a mixture of bismuth oxide and tungsten oxide,
Claim 2
Dependent Claim
13 words
A process as defined in claim 1 wherein said catalyst comprises bismuth tungstate.
Claim 3
Dependent Claim
22 words
A process as defined in claim 1 wherein the ratio of bismuth to tungsten is in the range of 1:3 to 5:1.
Claim 4
Dependent Claim
13 words
a mixture of bismuth tungstate and either tungsten oxide or bismuth oxide; and
Claim 5
Dependent Claim
35 words
a mixture of bismuth tungstate with tungsten oxide and bismuth oxide, at a pressure of from 1 to 50 atmospheres and a contact time of 0.1 to 60 seconds and thereafter recovering the reaction products.
Claim 6
Dependent Claim
17 words
A process as defined in claim 3 wherein the ratio of bismuth to tungsten is from 2:3.
Claim 7
Dependent Claim
22 words
A process as defined in claim 1 where said catalyst carrier is selected from the group consisting of silica, silica-alumina and kieselguhr.
Claim 8
Dependent Claim
13 words
A process as defined in claim 1 wherein said catalyst carrier is silica.
Claim 9
Dependent Claim
21 words
A process as defined in claim 1 wherein the disproportionation is carried out at a temperature ranging from 450* to 500*C.
Claim 10
Dependent Claim
16 words
A process as defined in claim 1 wherein the disproportionation is carried out at atmospheric pressure.
Claim 11
Dependent Claim
20 words
A process as defined in claim 1 wherein the olefin is a olefin having from three to 12 carbon atoms.
Claim 12
Dependent Claim
12 words
A process as defined in claim 1 wherein the olefin is propylene.
Claim 13
Dependent Claim
12 words
A process as defined in claim 1 wherein the olefin is 1-pentene.
References Cited (Backward Citations)
US2991322A
Cited
US3370103A
Cited
US3511890A
Cited
US3546311A
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US3579602A
Cited
US3488402A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |