IP Library › Granted Patent US 12,593,864
Granted Patent B2
US 12,593,864 · App. 16/614,111 · Granted Apr 7, 2026

Method of making a tobacco extract

Inventor: Marina Sintyureva (London, GB)
Assignee: NICOVENTURES TRADING LIMITED
A24B15/167A24B15/243A24B15/26A24B15/301
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Quick Facts
Patent No.
US 12,593,864
App. No.
16/614,111
Granted
Apr 7, 2026
Kind
B2
Abstract

Embodiments described herein provide a method of making a tobacco extract comprising; (a) contacting tobacco with an extraction solvent in a first chamber such that tobacco components are extracted from the tobacco into the extraction solvent, wherein the extraction solvent is a supercritical fluid in the first chamber; (b) passing the extraction solvent containing tobacco components along a line towards a second chamber, wherein a valve is present in the line and the conditions downstream of the valve are such that the extraction solvent is subcritical; and (c) pumping entrapment solvent into a flow downstream of the valve, wherein the tobacco components are released from the extraction solvent by transfer to subcritical conditions and are dissolved in the entrapment solvent, whereby the tobacco components dissolved in entrapment solvent are collected in the second chamber.

Claims (16)

1 . A method of making a tobacco extract, the method comprising:

(a) contacting tobacco with an extraction solvent in a first chamber such that tobacco components are extracted from the tobacco into the extraction solvent, wherein the extraction solvent is a supercritical fluid in the first chamber;

(b) passing the extraction solvent containing tobacco components along a line towards a second chamber, wherein a valve is present in the line and the conditions downstream of the valve are such that the extraction solvent is subcritical; and

(c) pumping entrapment solvent into a flow downstream of the valve and through the second chamber, wherein the tobacco components are released from the extraction solvent by transfer to subcritical conditions and are dissolved in the entrapment solvent, whereby the tobacco components dissolved in entrapment solvent are collected from the second chamber, and wherein entrapment solvent is pumped into the system at an approximately constant flow rate throughout the process, wherein the tobacco components include tobacco aromas and/or flavors.

2 . The method according to claim 1 , wherein the extraction solvent comprises carbon dioxide.

3 . The method according to claim 2 wherein at (a), the temperature is in the range of about 308-473K and the pressure is in the range of about 8-85 MPa.

4 . The method of claim 3 , wherein at (a), the temperature is in the range of about 328-350K.

5 . The method of claim 3 , wherein at (a), the pressure is in the range of about 20-30 MPa.

6 . The method according to claim 1 , wherein the entrapment solvent comprises an aerosol generating agent.

7 . The method according to claim 6 , wherein the entrapment solvent comprises a polyol.

8 . The method according to claim 7 , wherein the entrapment solvent comprises glycerol and/or propylene glycol.

9 . The method according to claim 1 , wherein the tobacco components include nicotine.

10 . The method of claim 1 , further comprising a step of providing the entrapment solvent containing dissolved tobacco components in a cartridge.

11 . The method of claim 10 , wherein the cartridge is configured for use in a smoking article.

12 . The method of claim 1 , wherein the tobacco extract has a viscosity of greater than 0.32 Pa s.

13 . The method of claim 1 , wherein the tobacco extract has a viscosity of at least 0.74 Pa s.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 24, 2021
From: BRITISH AMERICAN TOBACCO (INVESTMENTS) LIMITED
To: NICOVENTURES TRADING LIMITED
Reel/Frame 055405/0253 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 3, 2020
From: SINTYUREVA, MARINA
To: BRITISH AMERICAN TOBACCO (INVESTMENTS) LIMITED
Reel/Frame 051998/0269 →
Priority Claims (1)
GB 1707759 · May 15, 2017 · national
Continuity (1)
Related Publication 20210153542A1 · May 27, 2021
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