摘要:
A process for producing a regenerated tobacco material which comprises extracting a natural tobacco material with an aqueous extractant to obtain an extract containing components of the natural tobacco material and an extraction residue, subjecting the extract to adsorptive separation with an adsorbent to reduce the amount of nitrosamines, preparing a regenerated tobacco web from the extraction residue, and adding part or all of the extract reduced in nitrosamine content to the regenerated tobacco web. The adsorbent is a highly hydrophobic one. The adsorptive separation is accomplished in 60 minutes using a highly hydrophobic adsorbent in an amount corresponding to 10-110 wt.% of the amount of the soluble components contained in the extract.
摘要:
A method of manufacturing a regenerated tobacco material includes extracting a natural tobacco material with an aqueous extracting solvent to obtain an extract solution containing components of the natural tobacco material and an extraction residue, subjecting the extract solution to an adsorption separation operation using an adsorbent to reduce an amount of nitrosamines, preparing a regenerated tobacco web using the extraction residue, and adding at least a part of the extract solution in which the amount of nitrosamines is reduced, to the regenerated tobacco web. The adsorbent is a strongly hydrophobic adsorbent. The adsorption separation operation is carried out within 60 minutes using the strongly hydrophobic adsorbent in an amount corresponding to 10 to 110% of a weight of soluble components of the extract solution.