Patent US3615286A successfully refreshed from Google Patents.
US3615286A
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Solid fire lighting fuel and process of preparation
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1968-04-10
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Granted: 1971-10-26
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Expires: 1988-04-10
Abstract
Abstract A solid fuel briquet, useful for igniting wood in a fireplace or for igniting charcoal or charcoal briquets in outdoor barbecue apparatus and the like comprises a major proportion of a liquid hydrocarbon fuel such as a petroleum distillate fuel, and a minor solidifying proportion of a urea-formaldehyde resin. To prepare the fuel composition, a mixture of a urea-formaldehyde resin syrup and an aqueous emulsion of hydrocarbon fuel is first prepared, and the resin syrup is caused to gel with an acidic gelling agent. By causing gelation while the mixture is in a suitable mold a briquet of desired size and shape can be produced.
Inventors
- 👤 Ronald C Vander Linden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:43
CPC Classifications
C; C10; C10L; C10L7/00; C10L7/02; C10L11/00; C10L11/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
64 words
Process as defined by claim 1 wherein the proportions of components are within the range of about 75 to 88 wt. percent of liquid hydrocarbon, from about 5 to 12 wt. percent of urea-formaldehyde resin, from about 0.2 to 2 wt. percent of emulsifier, from about 5 to 14 wt. percent of water, and from about 0.1 to 1 wt. percent of said acid.
Claim 2
Dependent Claim
14 words
Process as defined by claim 1 wherein said acid of phosphorus is orthophosphoric acid.
Claim 3
Dependent Claim
14 words
Process as defined by claim 1 wherein said acid of phosphorus is phosphorous acid.
Claim 4
Dependent Claim
28 words
Process as defined by claim 1 wherein said urea-formaldehyde resin has a mole ration of from about 1.4 to about 2.8 moles of formaldehyde per mole of urea.
Claim 5
Dependent Claim
18 words
Process as defined by claim 1 wherein said anionic emulsifier is a dialkyl ester of sodium sulfosuccinic acid.
Claim 6
Dependent Claim
17 words
Process as defined by claim 1 wherein said emulsifier is the dioctyl ester of sodium sulfosuccinic acid.
Claim 7
Dependent Claim
110 words
A continuous process for the preparation of a shaped solid fuel which comprises the steps of emulsifying a liquid hydrocarbon boiling within the range of about 250* to 680* F. with an aqueous solution of an anionic emulsifier, adding to said emulsion from about 0.2 to about 1.5 wt. percent of oxy acid of phosphorus, continuously blending a flowing stream of the resulting acidified emulsion with a flowing steam of an aqueous solution of urea-formaldehyde syrup, and flowing said blended streams into a moving succession of molds, wherein said blended streams are rapidly converted into a solid material as a result of contact of said acid with said urea-formaldehyde syrup.
Claim 8
Dependent Claim
12 words
A solid fuel briquet made by the process defined by claim 1.
Claim 9
Dependent Claim
44 words
A solid fuel briquet made by the process defined by claim 1 wherein said hydrocarbon is a hydrocarbon fraction having an initial boiling point of at least about 300* F. and having not more than about 25 volume percent boiling above about 560* F.
Claim 10
Dependent Claim
22 words
A solid fuel briquet made by the process of claim 1 wherein said liquid hydrocarbon is at least 50 volume percent isoparaffinic.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |