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US4242529A
Expired / Lapsed
US
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Hydrogenolysis of 2,5-norbornadiene saturated endo-endo hexacyclic dimer
Assignee: Sunoco Inc R&M
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Filing: 1978-09-15
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Granted: 1980-12-30
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Expires: 1998-09-15
Abstract
Abstract Hydrogenolysis of a saturated endo-endo dihydronorbornadiene hexacyclic dimer involves the use of a catalytic amount of a Group VIII metal and the presence of hydrogen. The resulting pentacyclic isomers can be used as a diluent for depressing the freezing point of the saturated hexacyclic dimer which is a component of a high density missile fuel.
Inventors
- 👤 Abraham Schneider
- 👤 Harry K. Myers, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:59
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/02; C07C5/13; C07C2523/00; C07C2523/38; C07C2523/40; C07C2523/42; C07C2523/44; C07C2523/46; C07C2523/70; C07C2523/74; C07C2523/755; C07C2603/00; C07C2603/56; C07C2603/90
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
78 words
Process for the liquid phase hydrogenolysis of a saturated endo-endo dihydronorbornadiene hexacyclic dimer comprising: (a) contacting a dimer having the following structure, ##STR4## with a catalytic amount of a Group VIII metal and in the presence of hydrogen; (b) having the contacting occur, in the absence of a solvent, at a temperature in the range between from about 50° C. to about 350° C.; and (c) continuing the contacting until the cyclopropane ring of the dimer is opened.
Claim 2
Dependent Claim
78 words
Process for the liquid phase hydrogenolysis of a saturated endo-endo dihydronorbornadiene hexacyclic dimer comprising: (a) contacting a dimer having the following structure, ##STR4## with a catalytic amount of a Group VIII metal and in the presence of hydrogen; (b) having the contacting occur, in the absence of a solvent, at a temperature in the range between from about 50° C. to about 350° C.; and (c) continuing the contacting until the cyclopropane ring of the dimer is opened.
Claim 3
Dependent Claim
26 words
Process according to claim 1 wherein the amount of catalyst to the dimer is in the range between from about 0.5 wt.% to about 15 wt.%.
Claim 4
Dependent Claim
20 words
Process according to claim 1 wherein the metal is selected from the group consisting of palladium, nickel, rhodium and platinum.
Claim 5
Dependent Claim
21 words
Process according to claim 1 wherein the temperature is in the range between from about 75° C. to about 300° C.
Claim 6
Dependent Claim
23 words
Process according to claim 1 wherein the pressure of the hydrogen is in the range between from about atmospheric to about 1000 psig.
Claim 7
Dependent Claim
42 words
Process according to claim 5 wherein the amount of catalyst to the dimer is in the range between from about 0.5 wt.% to about 15 wt.% and the temperature is in the range beween from about 75° C. to about 300° C.
Claim 8
Dependent Claim
20 words
Process according to claim 6 wherein the metal is selected from the group consisting of palladium, nickel, rhodium and platinum.
Claim 9
Dependent Claim
24 words
Process according to claim 7 wherein the pressure of the hydrogen is in the range between from about 25 psig to about 1000 psig.
Claim 10
Dependent Claim
28 words
Process according to claim 8 wherein the concentration of the metal present on the catalyst is in the range between from about 0.1 wt.% to about 10 wt.%.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-30 | 1984-06-30 | 1984-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-30 | 1988-06-30 | 1988-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-30 | 1992-06-30 | 1992-12-30 | $7700.00 | Window Closed / Lapsed |