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Publication numberUS802487 A
Publication typeGrant
Publication dateOct 24, 1905
Filing dateDec 28, 1903
Priority dateDec 28, 1903
Publication numberUS 802487 A, US 802487A, US-A-802487, US802487 A, US802487A
InventorsKarl Wimmer
Original AssigneeKarl Wimmer
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Treatment of tobacco for the removal of nicotin.
US 802487 A
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Description  (OCR text may contain errors)

TREATMENT OF TOBAGOO FOR THE REMOVAL OF NIGOTIN.

APPLICATION FILED DEO.28, 190s.

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I Jwsa/r PATENTED OCT. 24, 1905.

- outrun STATES PATENT oFFIoE.

KARL WIMMER, OF BREMEN'GERMANY.

Specification of Letters Patent.

Patented Oct. 24:, 1905.

Application filed December 28, 1903- Serial No. 186,387.

To (tZZ whom it may concern.-

Be it known that I, KARL VVIMMER, a subject of the German Emperor, residing at Bremen, Germany, (Whose post-office address is 24: Sogestrasse, Bremen, Germany,) have invented an Improvement in the Treatment of Tobacco for the Removal of Nicotin, of which the following is a specification.

The present invention has for its object to extract nicotin from 'tobacco without depriv-- ing the tobacco of its valuable constituents.

If tobacco is treated with water, alcohol, ether, or other known solvents of nicotin the substances which determine the perfume and combustibility of the tobacco enter into solution along with the nicotin. In order to avoid the loss of these constituents, I first remove the nicotin from the liquid extract and then add the residual constituents of the extract again to the tobacco. For this purpose the liquid coming from the extractor containing the tobacco may be caused to pass first through a series of receptacles containing the substances necessary for binding or precipitating the nicotin and then conducted to a still adapted to evaporate the solvent, which is then.

caused to again enter the extractor and utilized for the extraction of the tobacco. The solvent thus performs a continuous circuit by passing first through the extractor containing the tobacco, from which it extracts nicotin and other constituents, then through the absorption vessels, in which the nicotin is given otf, then through the still, and, finally, again to the extractor.

The accompanying diagram Figure 1 indicates an example of an extraction and recovery plant which may be used for carrying out my process. Fig. 2 indicates an alternative construction, as hereinafter described.

' A indicates the extractor, which is charged with the tobacco and the extracting liquid.

1, 2, 3, and 4: are a series of precipitating or absorption vessels serving to remove the nicotin from the liquid extract, and B indicates the still, which receives the extract from the vessel 4 and from which the vapor of the solvent ascends again into the extractor through a pipe d.

The liquid extract is allowed to flow from the extractor through a pipe (0 into the first absorption vessel 1, which is placed at a lower level and contains a substance adapted to absorb or precipitate nicotin. After having passed through this vessel in an upward direction the extract is allowed to flow from the top through a pipe Z) to the bottom of the sec- 1 0nd vessel 2, similar to the first and serving to absorb or precipitate a further quantity of nicotin, then to the third and to the fourth vessel, all of which contain a substance or substances adapted to absorb or precipitate nicotin from the extract. From the top of the fourth vessel a pipe 0 leads the extract to the still B, as mentioned above.

The process may be simplified by utilizing the still for the removal of the nicotin from the extract, the substances necessary for the purpose being added to the extract contained in the still. By another modification (indicated by Fig.

2) the extractor may be mounted above the still and separated from the latter only by a pair of sieves or strainers, the upper strainer carrying the tobacco and the lower one the precipitant or absorbent for nicotin. In that case the extracting liquid which has been in contact with the tobacco descends through the upper sieve to the lower sieve, where it leaves the nicotin, and then descends through thesieve into the still. In the modification represented by Fig. 2, A represents the extraction-chamber; B, the still, heated by a steam-coil 7). separated from the extraction-chamber by a sieve f, and from the still by a sieve g. The liquid passing through the sieve g descends into the still, and the vapors generated in the latter ascend into the extraction-chamber. When the extraction has continued long enough, the tobacco is impregnated with the liquid which has been relieved of nicotin, but retains the other substances extracted from the tobacco, preferably by pouring the said liquid over the tobacco, for which purpose the quantity of liquid should as arule be sufficient for completely submerging the tobacco.

After about an hour or more, during which time the extracted substances diifuse back into the cells of the tobacco, the liquid is drawn off and the tobacco is dried.

The substance for absorbing the nicotin must of course be chosen according to the solvent used for extraction. If water is used as a solvent, tannic acid, molybdic acid, salts or double salts of tungstic or phosphoric acid, compounds of the heavy metals, and other means for precipitating nicotin or other alkaloids may be employed. If volatile solvents or ethers, such as sulfuric ether or petroleum ether, are used for extraction, charcoal,(which absorbs nicotin,) alone or with other mechan- C is the absorption-chamber,

' hydrochloric acid, oxalic acid-which yield mately in the same salts of nicotin insoluble in ether may be used. Acidulated water and other liquids may also be used as absorbents.

The tobacco treated according to the present invention is practically free from nicotin, but contains the substances on which the per fume and combustibility depend approxitobacco.

What I claim is 1. The process for relieving tobacco of nicotin without losing its valuable constituents, which consists in treating the tobacco with a solvent adapted to extract the nicotin, subsequently relieving the liquid extract thus obtained of nicotin, then impregnating the tobacco treated as described with the extract remaining after the removal of the nicotin, and finally drying the tobacco, substantially as described.

2. The process for relieving tobacco of nicotin= without losing its valuable constituents,

which consists in treating the tobacco with a solvent adapted to extract the nicotin, subsequently relieving the liquid extract thus obtained of nicotin, recovering the solvent by distillation, reintroducing the solvent thus requantities as the original covered into the extractor for repeated treatment of the tobacco contained in the same, repeating this cycle of operations until the tobacco is sufiiciently free of nicotin, subsequently impregnating the tobacco with liquid tobacco extract which has been relieved of nicotin, and finally drying the tobacco, substantially as described.

3. The process for relieving tobacco of nicotin Without losing its valuable constituents, which consists'in subjecting the tobacco to a suitable solvent in an extracting vessel, then conducting the solvent or extract through a series of absorption vessels containing a substance suitable to absorb or precipitate the nicotin, then conducting the liquid thus treated to a still, distilling off the solvent, conduct- I ing the solvent vapors again to the extracting vessel, repeating this cycle of operations until the tobacco is sufiiciently free of nicotin, then impregnating the tobacco with the extracting liquid which has passed through the absorption vessels, and finally drying it, substantially as described.

In witness whereof I have hereunto set my hand in the presence of two subscribing witnesses. v

' KARL WIMMER Witnesses:

A. W. HOYERMANN F. REIoH.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2582075 *Sep 14, 1948Jan 8, 1952Mentore SeveriProcess for removing nicotine from tobacco
US2730148 *Oct 18, 1954Jan 10, 1956Carlo MatarreseMethod of treating vegetable material
US2805667 *Sep 9, 1954Sep 10, 1957Martin Brinkmann K GProcess for treating tobacco
US2805669 *Feb 7, 1955Sep 10, 1957Papel Para Cigarros S ARefluxed tobacco extract and method of making the same
US2822306 *Jul 1, 1955Feb 4, 1958Plate Gmbh DrAromatic and pleasant tasting de-nicotinized tobacco and method of producing same
US3046997 *Sep 27, 1960Jul 31, 1962Philip Morris IncSelective alkaloid extraction
US3110315 *Jul 27, 1960Nov 12, 1963Andrew LendvaiDenicotinization of tobacco
US3139435 *Mar 7, 1963Jun 30, 1964Philip Morris IncProcess for selective extraction of alkaloid
US3145717 *Oct 22, 1959Aug 25, 1964C H Dexter & Sons IncMethods of making tobacco web material
US3368567 *Mar 23, 1965Feb 13, 1968Morton Pharmaceuticals IncMethod of producing a tablet containing a tobacco concentrate
US3390685 *Mar 9, 1966Jul 2, 1968Eresta WarenhandelsgmbhProcess for extracting substances from plant particles
US3561451 *May 17, 1967Feb 9, 1971American Mach & FoundryProcess of manufacturing reconstituted tobacco of light color
US3580259 *Sep 6, 1968May 25, 1971Werner Richard Gotthard LutticTobacco flavoring
US3612066 *Feb 5, 1970Oct 12, 1971Reynolds Tobacco Co RDenicotinizing process
US3717155 *May 18, 1970Feb 20, 1973Amf CorpReconstituted tobacco product
US3880172 *Feb 13, 1973Apr 29, 1975Ici LtdSmoking mixtures
US3894543 *Jun 24, 1974Jul 15, 1975Ici LtdSmoking mixture
US4967771 *Dec 7, 1988Nov 6, 1990R. J. Reynolds Tobacco CompanyProcess for extracting tobacco
US5005593 *Oct 26, 1988Apr 9, 1991R. J. Reynolds Tobacco CompanyProcess for providing tobacco extracts
US5018540 *Nov 19, 1987May 28, 1991Philip Morris IncorporatedProcess for removal of basic materials
US5025812 *Aug 10, 1989Jun 25, 1991R. J. Reynolds Tobacco CompanyTobacco processing
US5065775 *Feb 23, 1990Nov 19, 1991R. J. Reynolds Tobacco CompanyTobacco processing
US5131414 *Jun 25, 1991Jul 21, 1992R. J. Reynolds Tobacco CompanyTobacco processing
US5234008 *Nov 14, 1991Aug 10, 1993R. J. Reynolds Tobacco CompanyTobacco processing
US5497792 *Nov 19, 1987Mar 12, 1996Philip Morris IncorporatedProcess and apparatus for the semicontinuous extraction of nicotine from tobacco
Classifications
Cooperative ClassificationA24B15/24