US4079742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of synthetic smoking materials
Assignee: Philip Morris USA Inc
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Filing: 1976-10-20
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Granted: 1978-03-21
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Expires: 1996-10-20
Abstract
Abstract An improved process is provided for the manufacture of synthetic smoking materials. The process comprises the steps of: (1) Pyrolyzing a cellulosic material at a temperature of from about 150° C to about 400° C, and preferably from about 175° C to about 275° C, under conditions such that from about 8 to about 40% and preferably from about 10 to 25% by weight of the cellulosic material is removed, and (2) Thereafter subjecting the resulting pyrolyzed cellulosic material to extraction with a basic liquid, for example, liquid ammonia, amine or aqueous bases, preferably under conditions to swell the material, whereby from about 15 to about 40%, and preferably from about 20 to about 30%, of the weight of the pyrolyzed product is removed during the extraction. Both steps should preferably be conducted in such a manner that the overall weight loss of the original cellulosic material is in the range of from about 25 to about 65%, preferably from about 30 to about 50%, whereby the resultant product has a tobacco-like brown color, is not brittle, and has improved smoking characteristics.
Inventors
- 👤 Norman B. Rainer
- 👤 Theodore E. Majewski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:12
CPC Classifications
A; A24; A24B; A24B15/00; A24B15/10; A24B15/16; A24B15/165
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
133 words
An improved process for the manufacture of synthetic smoking materials comprising the steps of: (1) Pyrolyzing a cellulosic material at a temperature of from about 150° C to about 400° C under conditions such that the cellulosic material undergoes a weight loss from about 8 to about 40% by weight, and (2) Thereafter subjecting the resulting pyrolyzed cellulosic material to extraction with a basic liquid at a temperature of 0° to 150° C and a pressure of 1 to 100 psia for sufficient time so that from about 15 to about 40% of the weight of the pyrolyzed product is removed during the extraction and conducting both steps in such a manner that the overall weight loss of the original cellulosic material is in the range of from about 25 to about 65%.
Claim 2
Dependent Claim
133 words
An improved process for the manufacture of synthetic smoking materials comprising the steps of: (1) Pyrolyzing a cellulosic material at a temperature of from about 150° C to about 400° C under conditions such that the cellulosic material undergoes a weight loss from about 8 to about 40% by weight, and (2) Thereafter subjecting the resulting pyrolyzed cellulosic material to extraction with a basic liquid at a temperature of 0° to 150° C and a pressure of 1 to 100 psia for sufficient time so that from about 15 to about 40% of the weight of the pyrolyzed product is removed during the extraction and conducting both steps in such a manner that the overall weight loss of the original cellulosic material is in the range of from about 25 to about 65%.
Claim 3
Dependent Claim
155 words
An improved process for the manufacture of synthetic smoking materials comprising the steps of: (1) Pyrolyzing a cellulosic material at a temperature of from about 150° C to about 400° C under conditions such that from about 8 to about 40% by weight of the cellulosic material is removed, and (2) Thereafer subjecting the resulting pyrolyzed cellulosic material to extraction with a basic liquid selected from the group consisting of: water-soluble amines and quarternary ammonium bases, liquid ammonia, ammonium hydroxide, and aqueous solutions of basic inorganic compounds at a temperature of 0° to 150° C and a pressure of 1 to 100 psia for sufficient time so that from about 15 to about 40% of the weight of the pyrolyzed product is removed during the extraction and conducting both steps in such a manner that the overall weight loss of the original cellulosic material is in the range of from about 25 to about 65%.
Claim 4
Dependent Claim
155 words
An improved process for the manufacture of synthetic smoking materials comprising the steps of: (1) Pyrolyzing a cellulosic material at a temperature of from about 150° C to about 400° C under conditions such that from about 8 to about 40% by weight of the cellulosic material is removed, and (2) Thereafer subjecting the resulting pyrolyzed cellulosic material to extraction with a basic liquid selected from the group consisting of: water-soluble amines and quarternary ammonium bases, liquid ammonia, ammonium hydroxide, and aqueous solutions of basic inorganic compounds at a temperature of 0° to 150° C and a pressure of 1 to 100 psia for sufficient time so that from about 15 to about 40% of the weight of the pyrolyzed product is removed during the extraction and conducting both steps in such a manner that the overall weight loss of the original cellulosic material is in the range of from about 25 to about 65%.
Claim 5
Dependent Claim
144 words
An improved process for the manufacture of synthetic smoking materials comprising the steps of: (1) Pyrolyzing a cellulosic material at a temperature of from about 150° C to about 400° C under conditions such that from about 8 to about 40% by weight of the cellulosic material is removed, (2) Thereafter subjecting the resulting pyrolyzed cellulosic material to extraction with a basic liquid at a temperature of 0° to 150° C and a pressure of 1 to 100 psia for sufficient time so that from about 15 to about 40% of the weight of the pyrolyzed product is removed during the extraction, and (3) Thereafter neutralizing the resulting pyrolyzed and extracted cellulosic material, and conducting steps (1) and (2) in such a manner that the overall weight loss of the original cellulosic material is in the range of from about 25 to about 65%.
Claim 6
Dependent Claim
144 words
An improved process for the manufacture of synthetic smoking materials comprising the steps of: (1) Pyrolyzing a cellulosic material at a temperature of from about 150° C to about 400° C under conditions such that from about 8 to about 40% by weight of the cellulosic material is removed, (2) Thereafter subjecting the resulting pyrolyzed cellulosic material to extraction with a basic liquid at a temperature of 0° to 150° C and a pressure of 1 to 100 psia for sufficient time so that from about 15 to about 40% of the weight of the pyrolyzed product is removed during the extraction, and (3) Thereafter neutralizing the resulting pyrolyzed and extracted cellulosic material, and conducting steps (1) and (2) in such a manner that the overall weight loss of the original cellulosic material is in the range of from about 25 to about 65%.
Claim 7
Dependent Claim
15 words
The process of claim 3, wherein said cellulosic material is in the form of paper.
Claim 8
Dependent Claim
29 words
The process of claim 4, wherein said paper is in the form of shreds having a length greater than 1 cm and a cross-sectional diameter greater than 0.5 mm.
Claim 9
Dependent Claim
9 words
The product formed by the process of claim 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-20 | 1981-09-19 | 1982-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-20 | 1985-09-19 | 1986-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-20 | 1989-09-19 | 1990-03-21 | $7700.00 | Window Closed / Lapsed |