Immobilized diluents in a smoking article are provided, wherein diluents can be immobilized through absorption and/or adsorption of the diluents into immobilizing materials, such as sorbents like silica gels. By immobilizing diluents, the diluents can be available for vaporization, while still being protected from migration and/or loss of the diluents in a smoking article.

There is provided a tobacco product or a non-tobacco snuff product, including a magnesium carbonate, for conferring pH stability to the product and preventing growth of bacteria and fungi therein. The magnesium carbonate may contain hydroxide, oxide, and crystal water. The amount of magnesium carbonate ranges from 0.01 and 30% by weight of the dry bulk material. The product may be combined with additional pH regulators. The magnesium carbonate significantly increase the pH-stability in snus and non-tobacco snuff at the normal pH-range used in these products. The final product, which may be oral snuff or snus, or any tobacco-free snuff product, may be in particulate form, or shaped in a variety of forms. The product may be an oral product. The product may be packaged in a box, can or canister. Use of a magnesium carbonate for producing the products is also described.

Embodiments provides treated tobacco material having a pH of at least 9 and a moisture content of no more than 20% based on the dry weight of the tobacco. Embodiments also provide a process for treating tobacco material to increase its pH to at least 9, the process comprising applying a basic solution to the tobacco material to be treated, and drying the material to produce a treated tobacco material with a moisture content of no more than 20%. Embodiments also provide devices comprising the treated tobacco material, and uses of the treated tobacco material.

The present disclosure provides a method of preparing whitened tobacco composition including chemically pulping a tobacco material to form a tobacco pulp, extracting the tobacco pulp with an extraction solution, treating the tobacco pulp with a solution comprising an oxidizing agent for a time and at a temperature sufficient to lighten the color of the tobacco pulp to give a whitened tobacco pulp, and drying the whitened tobacco pulp to provide the whitened tobacco composition. Alternative bleaching processes and treatment methods effective for preparing whitened tobacco compositions are also provided herein.

A heated aerosol-generating article is provided, including an aerosol-generating substrate, the aerosol-generating substrate including a homogenised botanical material comprising particulate plant material, an aerosol former, and a basic pH modifier; and the homogenised botanical material has a particulate plant material content of greater than or equal to about 60% by weight on a dry weight basis and less than or equal to about 90% by weight on a dry weight basis; and the homogenised botanical material has a pH greater than or equal to about 6.0 and less than or equal to about 8.0.

Immobilized diluents in a smoking article are provided, wherein diluents can be immobilized through absorption and/or adsorption of the diluents into immobilizing materials, such as sorbents like silica gels. By immobilizing diluents, the diluents can be available for vaporization, while still being protected from migration and/or loss of the diluents in a smoking article.

The disclosure describes methods for providing nicotine isolates, including: receiving a solution containing nicotine derived from green tobacco biomass of a plant of the Nicotiana species; converting the nicotine to nicotine sulfate; concentrating the resulting nicotine sulfate-containing solution; adjusting the pH of the resulting nicotine sulfate concentrate to a pH of about 9.5 or greater to convert the nicotine sulfate to nicotine in free base form; extracting the resulting basic concentrate with an organic solvent to partition the nicotine into the organic solvent; and distilling the nicotine-containing organic solution to afford a nicotine isolate comprising about 90% or more nicotine by weight.

The present document generally relates to methods and materials involved in producing tobacco or smokeless tobacco product comprising chlorate. For example, chlorate can be used to reduce tobacco specific nitrosamine content in tobacco or smokeless tobacco products.

Methods of modifying the tobacco-specific nitrosamine content of a tobacco material are described herein. One exemplary method comprises contacting a tobacco material with a composition comprising salt, sugar, enzyme, lactic acid bacteria, yeast, or a combination thereof to reduce the total bacterial content; curing the tobacco material; and fermenting the tobacco material in the presence of one or more microorganisms. The method can provide a fermented tobacco material having a tobacco-specific nitrosamine content that is reduced relative to a fermented tobacco material that has not been subjected to the disclosed method steps. In certain embodiments, the tobacco-specific nitrosamine content of the fermented tobacco material is no more than that of the cured tobacco material. Tobacco-containing products including such treated tobacco materials are also provided.

Methods of making reconstituted tobacco include contacting a mixture including tobacco pulp with one or more fluid streams including one or more peroxides (e.g., hydrogen peroxide), recovering one or more fluids from the tobacco pulp mixture, and reusing the recovered fluids in at least one subsequent tobacco pulp contacting step. In some cases, methods provided herein can recover one or more fluids including one or more peroxides, such that the at least one subsequent tobacco pulp contacting step includes contacting tobacco pulp with a fluid including one or more peroxides.