US3316919A - Processing of smoking tobacco - Google Patents

Processing of smoking tobacco Download PDF

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Publication number
US3316919A
US3316919A US36157864A US3316919A US 3316919 A US3316919 A US 3316919A US 36157864 A US36157864 A US 36157864A US 3316919 A US3316919 A US 3316919A
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United States
Prior art keywords
tobacco
liquor
solvent
bed
frozen
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Expired - Lifetime
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Inventor
Green Sydney James
Fordyce William Brian
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Brown and Williamson Holdings Inc
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Brown and Williamson Holdings Inc
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Priority to GB1683263A priority Critical patent/GB989703A/en
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Publication of US3316919A publication Critical patent/US3316919A/en
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Classifications

    • AHUMAN NECESSITIES
    • A24TOBACCO; CIGARS; CIGARETTES; SMOKERS' REQUISITES
    • A24BMANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00Chemical features or treatment of tobacco; Tobacco substitutes
    • A24B15/18Treatment of tobacco products or tobacco substitutes
    • A24B15/24Treatment of tobacco products or tobacco substitutes by extraction; Tobacco extracts

Description

United States Patent 3,316,919 PROCESSING OF SMOKING TOBACCO Sydney James Green, Portswood, and William Brian Fordyce, Romsey, England, assignors to Brown and Williamson Tobacco Corporation, Louisville, Ky., a

corporation of Delaware No Drawing. Filed Apr. 21, 1964, Ser. No. 361,578 Claims priori application Great Britain, Apr. 29, 1963,

16,832/ 63 8 Claims. (Cl. 131--143) This invention concerns improvements relating to the treatment or processing of tobacco. An object of the invention is to provide a simple and practicable means by which the aroma and smoke flavour of a smoking tobacco can be improved or modified. Such improvement may be desirable because the tobacco is of a low grade or suflers losses of aroma or flavour constituents in the course of its preparation.

Some of the more volatile aroma or flavour constitucuts of tobacco are in fact lost during conventional processing of leaf-tobacco into a form suitable for smoking purposes. Attempts have been made to avoid these losses, for example by operating at low temperatures during conditioning, blending and cutting operations, but these have been only partially successful. Attempts to recover the aromatic substances from the atmosphere have also proved diflicult or impracticable. The present invention seeks, inter alia, to provide means by which volatile aromatic substances in tobacco can be extracted and used to make up losses from tobacco processed in the usual way.

According to the invention, tobacco, preferably in a ground state, is extracted with a chilled solvent such as ice-cold water and the liquid obtained by the extraction is solidified and freeze-dried. Preferably, a filter is employed to retain the tobacco during the extraction. Thus,

obviate substantially decomposition of the more unstable aroma and flavour constituents. For example, a rate of about 3-6 ml./minute may advantageously be used. The eflluent liquid may be collected in a receiver maintained at a temperature substantially below 0 C., so that it freezes almost immediately on contact with the walls. On completion of the extraction, the solidified liquid is freeze-dried, yielding a pale-brown product of high aromaticity.

This product, in the form of a fine powder, can be used to impart flavour and aroma to conventionally prepared smoking tobacco either by adding up to, say, 10%, but of the powder to the tobacco,

reconstituted tobacco products.

By such methods, which can be easily applied in practice, the impact aroma and smoke flavour of cigarettes can be appreciably changed by adding to the tobacco a freeze-dried extract from an aromatic or characterful tobocco. This may be done (a) to modify low grade flavour may be available from waste tobacco sources. In all cases, the flavouring tobacco may be a relatively cheap material.

Examples of ways of carrying the invention into etfect will now be more fully described:

Example 1 (a) parts of aromatic fire-cured tobacco were reduced to /8 inch diameter particles and extracted with chilled, preferably ice-cold, water using 6 parts by weight of water to each part of tobacco. The extraction was carried out at a rate of 5 mL/minu'te by percolation of the ice-cold water through a bed of supported by a filter screen.

In the extraction, it is important that the period of contact between the chilled water andthe tobacco should be substantially the same regardless of the quantity of tobacco. This involves co-relating the total flowrate to the area and porosity of the filter and the depth of the bed of tobacco. A flow-rate of .3-6 mL/min. may suitably be employed for a 2 inch depth of bed supported by a 4 inch diameter screenwith a range of maximum pore diameters of 15-40 microns (i.e. Grade No. 3 of British Standards Specification 1752 Laboratory Sintered or Fritted Filters). Variations of the three parameters to give the required contact period for different quantities of tobacco with diflerent sizes of equipment can be calculated.

The efiluent liquid from the extraction was immediately frozen by being cooled to about 50 C., at which tem perature substantially all the material extracted remains involatile and chemically inert. The water was then removed by freeze-drying carried out with the frozen efiluent at -50 C., .a drying chamber temperature of 28 to 40 C., preferably 35 C., and a pressure decrease until the temperature of the residue attained the temperature of the drying chamber. At this temperature, the dried residue was substantially stable chemically. 19 parts of a fine, pale-brown, powder were produced.

The two temperatures, 50 C. and +35 C., were chosen to ensure not only that the extracted material remained virtually constant in its chemical composition during processing, but also to give a reasonable value for the water-vapour pressure over the icy mixture during processing and to avoid an unduly long processing time.

Pulverisation of the product of the freeze-drying process under the conditions specified was unnecessary, but if the frozen effluent had a higher concentration of extracted material, a highly friable flake may be produced which would require pulverisation.

(b) The powder produced in the above-described manner was dusted evenly onto a blend of cut tobacco rag of high quality to give an addition of 5% by weight of the powder to the original weight of the cut tobacco. The material so obtained was made into cigarettes and was smoked by a panel of smokers in comparison with cigarettes made from untreated similar tobacco. A majority of the panel noticed a marked enhancement of the flavour characteristics of the smoke from the treated cigarettes.

Example 2 Powder produced as in Example 1(a) was dusted evenly onto a blend of cut tobacco rag of low quality to give an addition of 5% by weight of the powder to the original weight of the cut tobacco. Cigarettes made from this material were smoked by a panel of smokers in comparison with cigarettes made from untreated simi- A marked improvement and enhancement from the treated cigarettes r tobacco.

the flavour of the smoke as noticed.

Example 3 an aromatic Burley tobacco were (a) 100 part of 21 parts of a fine Example 4 Using the powder produced in accordance with Examle 3(a), the procedure described in Example 2 was caried out. A panel of smokers noticed a marked improveient of the flavour of the smoke from the cigarettes nade from the treated tobacco.

We claim:

1. A method of treating tobacco comprising preparng a bed of ground tobacco disposed on a filtering means laving a porosity such that a solvent passing through the 16d is controlled at a sufiicient rate so as to obviate subitantially decomposition of the more unstable tobacco iroma and flavor constituents contained in the liquor; :xtracting the ground tobacco with an ice-cold solvent 9y percolation of the solvent through the bed of tobacco; rapidly freezing the liquor by subjecting the liquor to a temperature substantially below the freezing point of the solvent so that all of the material extracted remains substantially involatile and chemically inert and then freeze drying the frozen liquor by subjecting the frozen liquor to reduced pressures while maintaining the liquor in a frozen state until the flavor and aroma constituents extracted from the tobacco are free of solvent.

2. A method as claimed in claim 1, wherein the solvent is ice-cold water.

3. A method as claimed in claim 1, wherein the tobacco is reduced to about Ms inch particle size and is extracted with ice-cold water, using 6 parts by weight of water to each part of tobacco, by percolating the water through the tobacco, supported as a bed on a filter screen, at a rate of about 5 ml./ per minute, the percolated liquor being rapidly frozen and the water removed by freeze drying.

4. A method of treating tobacco as set forth in claim 1 wherein the freeze dried flavor and aroma constituents are added to a smoking tobacco in a proportion up to 10% of the freeze dried material based on the weight of the smoking tobacco.

5. A method of preparing an improved flavor and aroma tobacco smoking product comprising preparing a bed of ground tobacco disposed on a filtering means having a porosity such that a solvent passing through the bed is controlled at a sufficient rate so as to obviate substantially decomposition of the more unstable tobacco aroma and flavor constituents contained in the liquor; extracting the ground tobacco with an ice-cold solvent by percolation of the solvent through the bed of tobacco; rapidly freezing the liquor by subjecting the liquor to a temperature substantially below the freezing point of the solvent so that all of the material extracted remains substantially involatile and chemically inert and then freeze drying the frozen liquor by subjecting the frozen liquor to reduce pressures while maintaining the liquor in a frozen state until the flavor and aroma constituents extracted from the tobacco are free of solvent, and then adding the freeze dried flavor and aroma constituents to smoking tobacco in a proportion up to 10% by weight of the aroma material based on the weight of smoking tobacco and then forming a smoking tobacco product.

6. A method as claimed in claim 5, wherein the said product, in the form of a fine powder, is dusted upon the said smoking tobacco.

7. A method as claimed in claim 5, wherein the said product is added in a proportion of about 5% of the said smoking tobacco.

8. A smoking tobacco product made by the method of claim 5.

References Cited by the Examiner UNITED STATES PATENTS 720,830 2/1903 Marsden 131143 1,016,844 2/ 1912 Moonelis 131143 X 2,783,149 2/ 1957 Epstein 99-7l FOREIGN PATENTS 832,991 4/ 1960 Great Britain.

910,451 11/1962 Great Britain.

SAMUEL KOREN, Primary Examiner.

MELVIN D. REIN, Examiner.

Claims (1)

1. A METHOD OF TREATING TOBACCO COMPRISING PREPARING A BED OF GROUND TOBACCO DISPOSED ON A FILTERING MEANS HAVING A POROSITY SUCH THAT A SOLVENT PASSING THROUGH THE BED IS CONTROLLED AT A SUFFICIENT RATE SO AS TO OBVIATE SUBSTANTIALLY DECOMPOSITION OF THE MORE UNSTABLE TOBACCO AROMA AND FLAVOR CONSTITUENTS CONTAINED IN THE LIQUOR; EXTRACTING THE GROUND TOBACCO WITH AN ICE-COLD SOLVENT BY PERCOLATION OF THE SOLVENT THROUGH THE BED OF TOBACCO; RAPIDLY FREEZING THE LIQUOR BY SUBJECTING THE LIQUOR TO A TEMPERATURE SUBSTANTIALLY BELOW THE FREEZING POINT OF THE SOLVENT SO THAT ALL THE MATERIAL EXTRACTED REMAINS SUBSTANTIALLY INVOLATILE AND CHEMICALLY INERT AND THEN FREEZE DRYING THE FROZEN LIQUOR BY SUBJECTING THE FROZEN LIQUOR TO REDUCED PRESSURES WHILE MAINTAINING THE LIQUOR IN A FROZEN STATE UNTIL THE FLAVOR AND AROMA CONSTITUENTS EXTRACTED FROM THE TOBACCO ARE FREE OF SOLVENT.
US36157864 1963-04-29 1964-04-21 Processing of smoking tobacco Expired - Lifetime US3316919A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1683263A GB989703A (en) 1963-04-29 1963-04-29 Improvements relating to the processing of smoking tobacco

Publications (1)

Publication Number Publication Date
US3316919A true US3316919A (en) 1967-05-02

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US36157864 Expired - Lifetime US3316919A (en) 1963-04-29 1964-04-21 Processing of smoking tobacco

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US (1) US3316919A (en)
CH (1) CH428535A (en)
DE (1) DE1517252A1 (en)
GB (1) GB989703A (en)
MY (1) MY6500172A (en)

Cited By (64)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3398754A (en) * 1966-06-27 1968-08-27 Gallaher Ltd Method for producing a reconstituted tobacco web
US3476118A (en) * 1966-03-05 1969-11-04 Werner Richard Gotthard Luttic Method of influencing tobacco smoke aroma
US3529607A (en) * 1968-09-05 1970-09-22 Werner Richard Gotthard Luttic Method of influencing the flavor of tobacco
US3730189A (en) * 1972-01-04 1973-05-01 Reynolds Tobacco Co R Tobacco product
US3847163A (en) * 1972-03-06 1974-11-12 Brown & Williamson Tobacco Method of making a tobacco extract
US3857403A (en) * 1972-06-16 1974-12-31 Firmenich & Cie Flavored tobacco product
US4819668A (en) * 1987-04-02 1989-04-11 R. J. Reynolds Tobacco Company Cigarette cut filler containing rare and specialty tobaccos
US4858630A (en) * 1986-12-08 1989-08-22 R. J. Reynolds Tobacco Company Smoking article with improved aerosol forming substrate
US4986286A (en) * 1989-05-02 1991-01-22 R. J. Reynolds Tobacco Company Tobacco treatment process
US4991599A (en) * 1989-12-20 1991-02-12 Tibbetts Hubert M Fiberless tobacco product for smoking and chewing
US5005593A (en) * 1988-01-27 1991-04-09 R. J. Reynolds Tobacco Company Process for providing tobacco extracts
US5016654A (en) * 1988-12-21 1991-05-21 R. J. Reynolds Tobacco Company Flavor substances for smoking articles
US5038802A (en) * 1988-12-21 1991-08-13 R. J. Reynolds Tobacco Company Flavor substances for smoking articles
US5060669A (en) * 1989-12-18 1991-10-29 R. J. Reynolds Tobacco Company Tobacco treatment process
US5074319A (en) * 1990-04-19 1991-12-24 R. J. Reynolds Tobacco Company Tobacco extraction process
US5099862A (en) * 1990-04-05 1992-03-31 R. J. Reynolds Tobacco Company Tobacco extraction process
US5131415A (en) * 1991-04-04 1992-07-21 R. J. Reynolds Tobacco Company Tobacco extraction process
US5235992A (en) * 1991-06-28 1993-08-17 R. J. Reynolds Tobacco Company Processes for producing flavor substances from tobacco and smoking articles made therewith
US5301694A (en) * 1991-11-12 1994-04-12 Philip Morris Incorporated Process for isolating plant extract fractions
US5318050A (en) * 1991-06-04 1994-06-07 R. J. Reynolds Tobacco Company Tobacco treatment process
US5413122A (en) * 1992-02-18 1995-05-09 R. J. Reynolds Tobacco Company Method of providing flavorful and aromatic compounds
US5435325A (en) * 1988-04-21 1995-07-25 R. J. Reynolds Tobacco Company Process for providing tobacco extracts using a solvent in a supercritical state
US5962662A (en) * 1990-12-20 1999-10-05 R.J. Reynolds Tobacco Company Method for producing a flavorful and aromatic composition for use in smoking articles
US6440223B1 (en) 2000-02-15 2002-08-27 R. J. Reynolds Tobacco Co. Smoking article containing heat activatable flavorant-generating material
US20020162563A1 (en) * 2001-05-01 2002-11-07 Williams Jonnie R. Smokeless tobacco product
US6499489B1 (en) 2000-05-12 2002-12-31 R. J. Reynolds Tobacco Company Tobacco-based cooked casing formulation
US6668839B2 (en) 2001-05-01 2003-12-30 Jonnie R. Williams Smokeless tobacco product
US20040020503A1 (en) * 2001-05-01 2004-02-05 Williams Jonnie R. Smokeless tobacco product
US6695924B1 (en) 2000-07-25 2004-02-24 Michael Francis Dube Method of improving flavor in smoking article
WO2005070239A1 (en) * 2004-01-27 2005-08-04 Ciuffo Gatto S.R.L. Process for reducing the level of harmful substances in tobacco leaves
US20120125354A1 (en) * 2010-11-18 2012-05-24 R.J. Reynolds Tobacco Company Fire-Cured Tobacco Extract and Tobacco Products Made Therefrom
US20130008457A1 (en) * 2011-07-04 2013-01-10 Junxiang Zheng Kind of preparation method of e-cigarette liquid
WO2013148810A1 (en) 2012-03-28 2013-10-03 R. J. Reynolds Tobacco Company Smoking article incorporating a conductive substrate
WO2014004648A1 (en) 2012-06-28 2014-01-03 R. J. Reynolds Tobacco Company Reservoir and heater system for controllable delivery of multiple aerosolizable materials in an electronic smoking article
WO2014037794A2 (en) 2012-09-04 2014-03-13 R. J. Reynolds Tobacco Company Electronic smoking article comprising one or more microheaters
WO2014058678A1 (en) 2012-10-08 2014-04-17 R. J. Reynolds Tobacco Company An electronic smoking article and associated method
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WO2014150247A1 (en) 2013-03-15 2014-09-25 R. J. Reynolds Tobacco Company Heating control arrangement for an electronic smoking article and associated system and method
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US8910639B2 (en) 2012-09-05 2014-12-16 R. J. Reynolds Tobacco Company Single-use connector and cartridge for a smoking article and related method
US20140373855A1 (en) * 2013-06-20 2014-12-25 Changning Dekang Biotechnology Co., Ltd Oral nicotine-substituted cytisine atomized liquid and its preparation method
US9078473B2 (en) 2011-08-09 2015-07-14 R.J. Reynolds Tobacco Company Smoking articles and use thereof for yielding inhalation materials
US9220302B2 (en) 2013-03-15 2015-12-29 R.J. Reynolds Tobacco Company Cartridge for an aerosol delivery device and method for assembling a cartridge for a smoking article
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CN103919264B (en) * 2014-04-10 2015-11-18 中国烟草总公司郑州烟草研究院 An energy-saving and efficient method of freeze-drying the fresh tobacco leaves

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US1016844A (en) * 1911-06-29 1912-02-06 Adolph Moonelis Artificial tobacco and process of making same.
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Cited By (82)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3476118A (en) * 1966-03-05 1969-11-04 Werner Richard Gotthard Luttic Method of influencing tobacco smoke aroma
US3398754A (en) * 1966-06-27 1968-08-27 Gallaher Ltd Method for producing a reconstituted tobacco web
US3529607A (en) * 1968-09-05 1970-09-22 Werner Richard Gotthard Luttic Method of influencing the flavor of tobacco
US3730189A (en) * 1972-01-04 1973-05-01 Reynolds Tobacco Co R Tobacco product
US3847163A (en) * 1972-03-06 1974-11-12 Brown & Williamson Tobacco Method of making a tobacco extract
US3857403A (en) * 1972-06-16 1974-12-31 Firmenich & Cie Flavored tobacco product
US4858630A (en) * 1986-12-08 1989-08-22 R. J. Reynolds Tobacco Company Smoking article with improved aerosol forming substrate
US4819668A (en) * 1987-04-02 1989-04-11 R. J. Reynolds Tobacco Company Cigarette cut filler containing rare and specialty tobaccos
US5005593A (en) * 1988-01-27 1991-04-09 R. J. Reynolds Tobacco Company Process for providing tobacco extracts
US5435325A (en) * 1988-04-21 1995-07-25 R. J. Reynolds Tobacco Company Process for providing tobacco extracts using a solvent in a supercritical state
US5016654A (en) * 1988-12-21 1991-05-21 R. J. Reynolds Tobacco Company Flavor substances for smoking articles
US5038802A (en) * 1988-12-21 1991-08-13 R. J. Reynolds Tobacco Company Flavor substances for smoking articles
US4986286A (en) * 1989-05-02 1991-01-22 R. J. Reynolds Tobacco Company Tobacco treatment process
US5060669A (en) * 1989-12-18 1991-10-29 R. J. Reynolds Tobacco Company Tobacco treatment process
US4991599A (en) * 1989-12-20 1991-02-12 Tibbetts Hubert M Fiberless tobacco product for smoking and chewing
US5099862A (en) * 1990-04-05 1992-03-31 R. J. Reynolds Tobacco Company Tobacco extraction process
US5074319A (en) * 1990-04-19 1991-12-24 R. J. Reynolds Tobacco Company Tobacco extraction process
US5962662A (en) * 1990-12-20 1999-10-05 R.J. Reynolds Tobacco Company Method for producing a flavorful and aromatic composition for use in smoking articles
US5131415A (en) * 1991-04-04 1992-07-21 R. J. Reynolds Tobacco Company Tobacco extraction process
US5318050A (en) * 1991-06-04 1994-06-07 R. J. Reynolds Tobacco Company Tobacco treatment process
US5235992A (en) * 1991-06-28 1993-08-17 R. J. Reynolds Tobacco Company Processes for producing flavor substances from tobacco and smoking articles made therewith
US5301694A (en) * 1991-11-12 1994-04-12 Philip Morris Incorporated Process for isolating plant extract fractions
US5413122A (en) * 1992-02-18 1995-05-09 R. J. Reynolds Tobacco Company Method of providing flavorful and aromatic compounds
US6440223B1 (en) 2000-02-15 2002-08-27 R. J. Reynolds Tobacco Co. Smoking article containing heat activatable flavorant-generating material
US6499489B1 (en) 2000-05-12 2002-12-31 R. J. Reynolds Tobacco Company Tobacco-based cooked casing formulation
US6695924B1 (en) 2000-07-25 2004-02-24 Michael Francis Dube Method of improving flavor in smoking article
US20020162563A1 (en) * 2001-05-01 2002-11-07 Williams Jonnie R. Smokeless tobacco product
US6668839B2 (en) 2001-05-01 2003-12-30 Jonnie R. Williams Smokeless tobacco product
US20040020503A1 (en) * 2001-05-01 2004-02-05 Williams Jonnie R. Smokeless tobacco product
US6834654B2 (en) 2001-05-01 2004-12-28 Regent Court Technologies, Llc Smokeless tobacco product
WO2005070239A1 (en) * 2004-01-27 2005-08-04 Ciuffo Gatto S.R.L. Process for reducing the level of harmful substances in tobacco leaves
US20070137664A1 (en) * 2004-01-27 2007-06-21 Franca Leo Process for reducing the level of harmful substances in tobacco leaves
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CN103369978B (en) * 2010-11-18 2018-08-28 R.J.雷诺兹烟草公司 Roasted tobacco extract and tobacco products made therefrom
CN103369978A (en) * 2010-11-18 2013-10-23 R.J.雷诺兹烟草公司 Fire-cured tobacco extract and tobacco products made therefrom
JP2013542744A (en) * 2010-11-18 2013-11-28 アール・ジエイ・レイノルズ・タバコ・カンパニー Fire InuiYo tobacco extracts and tobacco products to be manufactured from it
US20120125354A1 (en) * 2010-11-18 2012-05-24 R.J. Reynolds Tobacco Company Fire-Cured Tobacco Extract and Tobacco Products Made Therefrom
US20130008457A1 (en) * 2011-07-04 2013-01-10 Junxiang Zheng Kind of preparation method of e-cigarette liquid
US9930915B2 (en) 2011-08-09 2018-04-03 Rai Strategic Holdings, Inc. Smoking articles and use thereof for yielding inhalation materials
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GB989703A (en) 1965-04-22
DE1517252A1 (en) 1970-01-29
MY6500172A (en) 1965-12-31
CH428535A (en) 1967-01-15

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