A - Human Necessities – 24 – B
Patent
A - Human Necessities
24
B
A24B 15/20 (2006.01) A24B 15/24 (2006.01) B01D 33/04 (2006.01)
Patent
CA 2726838
This invention provides a method for removing undesirable constituents from tobacco which includes extracting tobacco material in an aqueous or organic solvent and filtering the product of the extraction using a horizontal belt filter. The extract and insoluble tobacco residue may be further treated enzymically, chemically or otherwise to remove a complement of undesirable constituents. The extract and insoluble tobacco residue are recombined to form a regenerated tobacco material that is less harmful when combusted than the original material.
La présente invention concerne un procédé d'élimination de constituants indésirables du tabac, qui comprend l'extraction du tabac dans un solvant aqueux ou organique et la filtration du produit de l'extraction au moyen d'un filtre à bande horizontale. L'extrait et les résidus de tabac insolubles peuvent être ensuite traités par voie enzymatique, chimique ou autre afin d'éliminer d'autres constituants indésirables. L'extrait et les résidus de tabac insolubles sont recombinés afin de former un tabac régénéré qui est moins nocif lors de sa combustion que le matériau d'origine.
Harris Alan
Hemsley Steve
British American Tobacco (investments) Limited
Fetherstonhaugh & Co.
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