Abstract: A method of producing a liquid tobacco extract is provided, including: preparing a tobacco starting material including natural tobacco material; heating the tobacco starting material in a non-sealed extraction chamber at an extraction temperature of between 125° C. and 160° C. for between 90 minutes and 270 minutes to release gaseous volatile compounds from the tobacco starting material, the tobacco starting material not being in a liquid suspension during the heating step, a flow of inert gas being passed through the tobacco starting material during the heating in the extraction chamber, and the inert gas carrying the gaseous volatile compounds released from the tobacco starting material during heating away from the chamber; collecting the volatile compounds released and carried away from the tobacco starting material by the inert gas flow during the heating; and forming a liquid tobacco extract including the collected volatile compounds.

Abstract: A method of producing a liquid tobacco extract is provided, the method including the steps of: preparing a tobacco starting material including natural tobacco material such that during the step of preparing the tobacco starting material, the tobacco is not subjected to any treatment adapted to alter the pH of the tobacco; heating the tobacco starting material in a flow of inert gas at an extraction temperature of between 125 degrees Celsius and 160 degrees Celsius for between 90 minutes and 270 minutes; collecting volatile compounds released from the natural tobacco starting material during the heating step; and forming a liquid tobacco extract comprising the collected volatile compounds.

Abstract: An aerosol-forming substrate is provided for an aerosol generating system, the aerosol-forming substrate including: a first particulate material; and a second particulate material, the first particulate material being formed from particles having a D50 size of between 2 micrometres and 20 micrometres, and the second particulate material being formed from particles having a D50 size of between 50 micrometres and 80 micrometres, the aerosol-forming substrate being a solid unitary body. An aerosol generating article including the aerosol-forming substrate, and a process for manufacturing the aerosol-forming substrate, are also provided.

Abstract: A liquid nicotine formulation for an aerosol-generating system, the liquid nicotine formulation including: nicotine; a liquid carrier; and a plurality of carboxylic acids, the plurality of carboxylic acids including benzoic acid and one or more carboxylic acids selected from the group consisting of acetic acid, adipic acid, fumaric acid, lactic acid, levulinic acid, malic acid, and succinic acid, a molar ratio of total carboxylic acid to nicotine in the liquid nicotine formulation being greater than or equal to about 0.65:1, and a molar ratio of benzoic acid to nicotine in the liquid nicotine formulation being greater than or equal to about 0.2:1. A cartridge for an aerosol-generating system is also provided, the cartridge including a liquid storage portion including the liquid nicotine formulation; and a fluid-permeable heating element in fluid communication with the liquid storage portion.

Abstract: A nicotine composition is provided, including a non-aqueous solvent; at least 0.2 percent by weight of nicotine based on the weight of the nicotine composition; a first ratio by weight of (?-ionone+?-damascenone) to (phenol) of greater than 0.25; and a second ratio by weight of (furaneol+(2,3-diethyl-5-methylpyrazine)*100)) to (nicotine) of greater than 5×10?4. A cartridge including the nicotine composition, and a method of preparing the nicotine composition, are also provided.

Abstract: A method of producing a liquid tobacco extract is provided, the method including the steps of: preparing a tobacco starting material including natural tobacco material such that during the step of preparing the tobacco starting material, the tobacco is not subjected to any treatment adapted to alter the pH of the tobacco; heating the tobacco starting material in a flow of inert gas at an extraction temperature of between 125 degrees Celsius and 160 degrees Celsius for between 90 minutes and 270 minutes; collecting volatile compounds released from the natural tobacco starting material during the heating step; and forming a liquid tobacco extract comprising the collected volatile compounds.

Abstract: A method of manufacturing a concentrated tobacco extract for an aerosol-generating article is provided, including: providing a natural tobacco material; heating the material to a temperature and for a time such that volatile species including nicotine are released from the material, the heating includes heating the material in a flow of inert gas or in a flow of a combination of an inert gas with water or steam or heating the material under vacuum; collecting the released volatile species and forming a liquid, naturally derived tobacco extract including the collected species, a polyhydric alcohol, and at least about 40 percent by weight of water; and heating the liquid extract to evaporate at least some of the water and obtain concentrated tobacco extract, by heating to a temperature and for a time such that a water content in the naturally derived tobacco extract is reduced by at least about 60 percent.

Abstract: A liquid tobacco extract is provided, including: a non-aqueous solvent; at least 0.2 percent by weight of nicotine based on a weight of the liquid tobacco extract; and a ratio by weight of (?-ionone+?-damascenone) to (phenol) of greater than 0.25.