Abstract: A method for recovering concentrated nicotine from tobacco curing includes collecting a first aqueous solution including moisture released from tobacco during curing tobacco and including nicotine. The first aqueous solution is passed through a strong cation resin to sorb the nicotine. A second aqueous solution comprising ammonium hydroxide is passed through the resin to elute the nicotine and form a third aqueous solution comprising nicotine and ammonium hydroxide. The ammonium hydroxide is removed from the third aqueous solution to generate a fourth aqueous solution comprising nicotine. The fourth aqueous solution is incubated under conditions to cause the fourth aqueous solution to separate into a fifth aqueous solution comprising a first concentration of nicotine and a sixth aqueous solution comprising a second concentration of nicotine. The first concentration of nicotine is greater than the second concentration of nicotine.

Abstract: The invention relates to a process for microencapsulation of phase change materials based on free radicals polymerization comprising: a) the preparation of i) a solution with, at least, a hydrophilic liquid and a stabilizer (continuous phase) and ii) a solution with, at least, a phase change material, a free radical initiator and a polymerizable material (discontinuous phase); b) the preparation of an emulsion by dispersing the discontinuous phase in the continuous phase under vigorous stirring; and c) the polymerization of monomers until the phase change material becomes microencapsulated. This process is simple and effective and avoids the use of hazardous compounds. The invention also relates to microcapsules obtainable by said process and to the use thereof in the thermal protection and storage of heat.