Process for the manufacture of synthetic smoking materials

• US 4,079,742 A
• Filed: 10/20/1976
• Issued: 03/21/1978
• Est. Priority Date: 10/20/1976
• Status: Expired due to Term

• Current Assignee: Philip Morris USA Incorporated (Altria Group, Inc.)
• Original Assignee: Philip Morris USA Incorporated (Altria Group, Inc.)
• Inventors: Rainer, Norman B., Majewski, Theodore E.
• Primary Examiner(s): Michell, Robert W.
• Assistant Examiner(s): Millin, V.
• Application Number:
  US05/734,033
• Time in Patent Office: 517 Days
• Field of Search: 131/2, 131/17, 131/140 R, 131/140 C, 131/15 C
• US Class Current: 131/359
• CPC Class Codes: A24B 15/165 comprising as heat source a carbon fuel or an oxidized or thermally degraded carbonaceous fuel, e.g. carbohydrates, cellulosic material

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.

Claims

1. 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%.

6. The product formed by the process of claim 1.

2. 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%.

3. 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%.

4. The process of claim 3, wherein said cellulosic material is in the form of paper.

5. 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.