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US4594251A
Expired / Lapsed
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Preparation of tar-depleted liquid smoke treated casings
Assignee: Viskase Corp
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Filing: 1984-04-04
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Granted: 1986-06-10
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Expires: 2004-04-04
Abstract
Abstract Tar-depleted liquid smoke solutions are made by generating a smoke vapor, selectively solvent extracting the tars from the smoke vapor, and absorbing the color, flavor and odor constituents of the smoke vapors into an aqueous medium. The aqueous tar-depleted liquid smoke has a high coloring ability, a high concentration of carbonyls, and a low phenol content and is used to treat a tubular casing.
Inventors
- 👤 Myron D. Nicholson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:09
CPC Classifications
A; A23; A23L; A23L27/00; A23L27/20; A23L27/27; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1324
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
73 words
A method for preparing a tar-depleted smoke colored and smoke flavored tubular casing which comprises (1) thermally decomposing wood in a oxygen-controlled atmosphere to generate smoke-vapors, (2) selectively solvent extracting the tars from the generated smoke vapors with a water immiscible organic solvent, (3) absorbing the tar-extracted smoke vapors into an aqueous medium to provide a tar-depleted liquid smoke solution, and (4) contacting a tubular casing wall with the tar-depleted liquid smoke solution.
Claim 2
Independent Claim
73 words
A method for preparing a tar-depleted smoke colored and smoke flavored tubular casing which comprises (1) thermally decomposing wood in a oxygen-controlled atmosphere to generate smoke-vapors, (2) selectively solvent extracting the tars from the generated smoke vapors with a water immiscible organic solvent, (3) absorbing the tar-extracted smoke vapors into an aqueous medium to provide a tar-depleted liquid smoke solution, and (4) contacting a tubular casing wall with the tar-depleted liquid smoke solution.
Claim 3
Dependent Claim
20 words
The method of claim 1 wherein the tar-depleted liquid smoke solution is neutralized to a pH greater than about 3.
Claim 4
Dependent Claim
23 words
The method of claim 1 wherein the tar-depleted liquid smoke solution is neutralized to a pH of between about 3 and about 3.5.
Claim 5
Dependent Claim
23 words
The method of claim 1 wherein the tar-depleted liquid smoke solution is neutralized to a pH of between about 3 and about 5.
Claim 6
Dependent Claim
20 words
The method of claim 1 wherein the tar-depleted liquid smoke solution has a light transmittance greater than about 50 percent.
Claim 7
Dependent Claim
19 words
The method of claim 1 wherein the tar-depleted liquid smoke solution has a light transmittance greater than about 80%.
Claim 8
Dependent Claim
19 words
The method of claim 1 wherein the tar-depleted liquid smoke solution has a light transmittance greater than about 90%.
Claim 9
Dependent Claim
18 words
The method of claim 1 wherein the tar-depleted liquid smoke solution has a light transmittance of about 96%.
Claim 10
Dependent Claim
24 words
The method of claim 1 wherein the tar-depleted liquid smoke solution has a phenol content less than about 10 percent of the carbonyl content.
Claim 11
Dependent Claim
24 words
The method of claim 1 wherein the tar-depleted liquid smoke solution has a phenol content of less than 2 percent of the carbonyl content.
Claim 12
Dependent Claim
23 words
The method of claim 1 wherein the tar-depleted liquid smoke solution has a phenol content of about 1.5 percent of the carbonyl content.
Claim 13
Dependent Claim
14 words
The method of claim 1 wherein the tar-depleted liquid smoke solution is further concentrated.
Claim 14
Dependent Claim
19 words
The method of claim 12 wherein the tar-depleted liquid smoke is neutralized to a pH greater than about 3.
Claim 15
Independent Claim
92 words
A method for preparing a tar-depleted smoke colored and smoke flavored tubular casing which comprises (1) thermally decomposing wood in an oxygen-controlled atmosphere to generate smoke-vapors, (2) contacting the smoke vapors, water, and an organic solvent immiscible in water and having a solubility parameter greater than about 2.7, to form a tar-containing liquid solvent phase and an aqueous liquid smoke phase, (3) separating the liquid smoke phase from the liquid solvent phase to provide a tar-depleted liquid smoke solution, and (4) contacting a tubular casing wall with the tar-depleted liquid smoke solution.
Claim 16
Independent Claim
92 words
A method for preparing a tar-depleted smoke colored and smoke flavored tubular casing which comprises (1) thermally decomposing wood in an oxygen-controlled atmosphere to generate smoke-vapors, (2) contacting the smoke vapors, water, and an organic solvent immiscible in water and having a solubility parameter greater than about 2.7, to form a tar-containing liquid solvent phase and an aqueous liquid smoke phase, (3) separating the liquid smoke phase from the liquid solvent phase to provide a tar-depleted liquid smoke solution, and (4) contacting a tubular casing wall with the tar-depleted liquid smoke solution.
Claim 17
Dependent Claim
21 words
The method of claim 14 wherein the smoke vapors are contacted with water and a solvent in a single contacting zone.
Claim 18
Dependent Claim
29 words
The method of claim 14 wherein the smoke vapors are contacted with a solvent in a first contacting zone and thereafter contacted with water in a second contacting zone.
Claim 19
Dependent Claim
20 words
The method of claim 14 wherein the temperature of the organic solvent phase in step (2) is about 40° C.
Claim 20
Dependent Claim
14 words
The method of claim 14 wherein the tar-depleted liquid smoke solution is further concentrated.
Claim 21
Dependent Claim
19 words
The method of claim 14 wherein the tar-depleted liquid smoke is neutralized to a pH greater than about 3.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1989-06-09 | 1989-12-09 | 1990-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-09 | 1993-12-09 | 1994-06-10 | $3760.00 | Window Closed / Lapsed |
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