US3904385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyacrylates and waxy residual fuel compositions thereof
Assignee: Texaco Inc
•
Filing: 1972-05-08
•
Granted: 1975-09-09
•
Expires: 1992-05-08
Abstract
Abstract An interpolymeric poly(n-alkylacrylate) of a molecular weight between about 3000 and 100,000 wherein said alkyl is of at least 18 carbons and at least 70 wt. % of said alkyl is of between 20 and 24 carbons inclusively, the C20 to C24 alkyl group consisting of between about 2 and 65 wt. % of C20 alkyl, between about 18 and 65 wt. % C22 alkyl, and between about 8 and 35 wt. % C24 alkyl; and a residual petroleum fuel containing between 4 and 15 wt. % macrocrystalline paraffin wax having incorporated therein a pour depressing amount of said poly (n-alkylacrylate) wherein said poly(n-alkylacrylate) is initially introduced in said residual fuel at a temperature above the solution point of said wax.
Inventors
- 👤 William M Sweeney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:32
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/192; C10L1/195; C10L1/196; C10L1/1963; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/16; C08F220/18; C08F220/1812; C10M; C10M145/00; C10M145/02; C10M145/10; C10M145/12; C10M145/14; C08F220/1818; C10M2203/00; C10M2203/10; C10M2203/108; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10N; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
106 words
A COMPOSITION COMPRISING A WAX CONTAINING RESIDUAL PETROLEUM FUEL OIL CONTAINING BETWEEN 4 AND 15 WT. % MACROCRYSTALLINE PARAFFINE WAX CONTANING A POUR DEPRESSING AMOUNT OF AN INTERPOLYMERIC POLY(N-ALKYLACRYLATE) OF A MOLECULAR WEIGHT BETWEEN ABOUT 3000 AND 100,000 WHEREIN THE N-ALKYL IS OF AT LEAST 18 CARBON AND AT LEAST 70 WT % OF SAID N-ALKYL IS OF 20 TO 24 CARBON CONSISTING OF BETWEEN ABOUT 2 AND 65 WT % OF C20 AKYL BETWEEN ABOUT 18 AND 65WT% C22 ALKYL AND BETWEEN ABOUT 8 AND 25 WT % C24 ALKYL SAID POLY(N-ALKYLACRYLATE) INTRODUCED INTO SAID OIL AT A TEMPERATURE ABOVE THE SOLUTION OF SAID WAX.
Claim 2
Dependent Claim
106 words
A COMPOSITION COMPRISING A WAX CONTAINING RESIDUAL PETROLEUM FUEL OIL CONTAINING BETWEEN 4 AND 15 WT. % MACROCRYSTALLINE PARAFFINE WAX CONTANING A POUR DEPRESSING AMOUNT OF AN INTERPOLYMERIC POLY(N-ALKYLACRYLATE) OF A MOLECULAR WEIGHT BETWEEN ABOUT 3000 AND 100,000 WHEREIN THE N-ALKYL IS OF AT LEAST 18 CARBON AND AT LEAST 70 WT % OF SAID N-ALKYL IS OF 20 TO 24 CARBON CONSISTING OF BETWEEN ABOUT 2 AND 65 WT % OF C20 AKYL BETWEEN ABOUT 18 AND 65WT% C22 ALKYL AND BETWEEN ABOUT 8 AND 25 WT % C24 ALKYL SAID POLY(N-ALKYLACRYLATE) INTRODUCED INTO SAID OIL AT A TEMPERATURE ABOVE THE SOLUTION OF SAID WAX.
Claim 3
Dependent Claim
86 words
A composition in accordance with claim 1 wherein said residual fuel oil consists of between about 25 and 75 volume % of a petroleum residuum having a macrocrystalline paraffin wax content between about 15 and 35 wt. % and between about 25 and 75 volume % of a cutter stock selected from the group consisting of a petroleum residuum having a macrocrystalline paraffin wax content between about 1 and 10 wt. % and a non-wax containing petroleum distillate having a boiling point between 300* and 850*F.
Claim 4
Dependent Claim
20 words
A composition in accordance with claim 2 wherein said pour depressing amount is between about 0.05 and 0.5 wt. %.
Claim 5
Dependent Claim
21 words
A composition in accordance with claim 2 wherein said alkyl is about 39% C20, about 27% C22 and about 14% C24.
Claim 6
Dependent Claim
21 words
A composition in accordance with claim 2 wherein said alkyl is about 12% C20, about 47% C22 and about 21% C24.
Claim 7
Dependent Claim
24 words
A composition in accordance with claim 1 wherein the macrocrystalline paraffin wax content in said fuel is between about 5 and 10 wt. %.
References Cited (Backward Citations)
US2403267A
Cited
US2604453A
Cited
US3304260A
Cited
US3340193A
Cited
US3445205A
Cited
US3726653A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |