Tobacco Treatment

a technology for tobacco and tobacco products, applied in the field of tobacco treatment, can solve the problems of difficult to maintain turbulent mixing at the edges of the vessel, not without their disadvantages, and the throughput of such extraction and separation processes is clearly limited

Inactive Publication Date: 2011-06-30
BRITISH AMERICAN TOBACCO (INVESTMENTS) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0030]In another embodiment, the process comprises extracting tobacco with an aqueous or organic solvent, treating the tobacco with an enzyme, rinsing the enzyme-treated tobacco with a salt solution and

Problems solved by technology

However, they are not without their disadvantages.
The throughput of such extraction and separation processes is clearly limited by the maximum capacity of the chosen apparatus.
Furthermore, as the size of the mixing vessel used in the batch reactor increases, maintaining turbulent mixing at the edges of the vessel becomes difficult.
The scale of the extraction and treatment steps is

Method used

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Embodiment Construction

[0040]In one embodiment of this invention, the tobacco material to be extracted is strip, cut, shredded or ground tobacco. In a preferred embodiment, the tobacco is shredded tobacco. Other forms of tobacco may, however, be extracted using the methods described herein.

[0041]The tobacco material may be mixed with a solvent for extraction to form a slurry. The solvent may be added to the tobacco material in a ratio of between 10:1 and 50:1, preferably between 20:1 and 40:1 and most preferably between 25:1 and 30:1 by weight. In a particularly preferred embodiment, the solvent is added to the tobacco material in a ratio of 27:1 by weight.

[0042]The solvent may be an organic solution, but preferably is an aqueous solution or is water. At the very start of the extraction process, the solvent is usually water, but it can also contain alcohols such as ethanol or methanol, or it can contain a surfactant. Other solvents could be used, depending on the particular constituents to be extracted fr...

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PUM

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Abstract

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.

Description

[0001]The present invention relates to the treatment of tobacco and, in particular, to the extraction of selected constituents from tobacco, for example, in order to reduce certain smoke components.BACKGROUND OF THE INVENTION[0002]Tobacco material may be treated and processed to produce a modified blend which, when combusted, gives rise to smoke in which specific constituents of the smoke are selectively reduced or removed compared to untreated tobacco. The sugar and nicotine content of the tobacco, however, preferably remains substantially unaffected by this process, so that the taste and smoking properties of the tobacco are maintained.[0003]Methods for removing or at least reducing selected constituents from tobacco are known in the art. Such methods may comprise an extraction step in which tobacco material is extracted with an aqueous or organic solvent, a separation step in which the extracted solution is separated from the insoluble tobacco residue by filtration, centrifugatio...

Claims

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Application Information

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IPC IPC(8): A24B15/26A24B15/24
CPCA24B15/20A24B15/24B01D11/023B01D11/0288
Inventor HARRIS, ALANHEMSLEY, STEVE
Owner BRITISH AMERICAN TOBACCO (INVESTMENTS) LTD
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