Classifications

• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
  • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
  • A24B15/18—Treatment of tobacco products or tobacco substitutes
  • A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
  • A24B15/30—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances
  • A24B15/36—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances containing a heterocyclic ring
  • A24B15/40—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances containing a heterocyclic ring having only oxygen or sulfur as hetero atoms
  • A24B15/403—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances containing a heterocyclic ring having only oxygen or sulfur as hetero atoms having only oxygen as hetero atoms
  • A24B15/406—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances containing a heterocyclic ring having only oxygen or sulfur as hetero atoms having only oxygen as hetero atoms in a five-membered ring
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
  • C07C51/54—Preparation of carboxylic acid anhydrides
  • C07C51/56—Preparation of carboxylic acid anhydrides from organic acids, their salts, their esters or their halides, e.g. by carboxylation

Definitions

• the invention is more particularly concerned with natural tobaccos, it can also be applied to synthetic or artificial tobacco foil.
• the invention can be applied to natural tobaccos lacking in aroma or tobaccos which are neutral in flavor.
• the invention may be applied to substances to be smoked which are not of a tobacco nature, for example medicinal cigarettes or to cigarettes or to cigarette filter materials.
• tobacco for example medicinal cigarettes or to cigarettes or to cigarette filter materials.
• the aim of this method was exclusively the production of a synthetic tobacco which was free of woody and cellulosic tobacco constituents. There was no intentionto bring about a systematic and predictable flavoring of a given natural tobacco or natural tobacco mixture.
• One object of the present invention is to overcome these difficulties occurring with prior art methods.
• a further aim of the invention is to enrich the smoke aroma of tobaccos which have a poor aroma.
• a further object of the invention is to provide a method of compounding a cigarette tobacco mixture in which, without any impairment of the smoke quality occurring, some expen' sive components are omitted and replaced by chemically prepared substances or by extracts.
• Substances in accordance with the above general formula can be added singly or in admixture in any convenientmanner to tobacco or part of a tobacco mixtureuFor instance the quantity added can be within the range of 0.00l to L0 percent by weight of the tobacco, the preferred range being 0.0l to 0.1 percent.
• Application can for example be by dipping the tobacco in solutions of the substituted pyrrols in suitable highly volatile solvents. Application can also be carried out by spraying on such solutions.
• the application can be at any suitable stage in the tobacco manufacturing process, for example in the case of cigarette production. it has been found convenient to spray on an 1-5 percent W/V- ethanolic solution of the substance or substances onto cut tobacco before it is passed into a cigarette making machine.
• the substances to be used in the method in accordance with the invention can be readily synthesized in accordance with the method of V. R. Skvarchenko (C. A. 45l8d l958)).
• a-ethylacetoacetic ester can be converted into methylethyl malomitrile as the bisulfite compound using sodium cyanide.
• methylethyl maleic anhydride can be obtained by saponification and dry distillation.
• the maleic anhydride can be converted readily into methylethyl maleimide by heating with urea.
• the steps in the reaction can be shown as follows:
• the tobacco mixture for cigarettes free of any aroma materials such as essential oils was sprayed with a 2.5 percent V/W solution of the substance in question in ethanol.
• the tobacco was then held fora week at 20 C. and 67 percent relative humidity and then made into cigarettes.
• the cigarettes so produced were then tested by a panel of experts so as to make a comparison with untreated tobacco mixture as regards flavor.
• the quantity of solution applied to the tobacco mixture was so chosen that the cigarettes of treated tobacco contained 0.001 percent by weight (or 0.0l percent in the tobacco smoke condensate) more Z-formylpyrrol (as regards the main smoke stream) than was the case with cigarettes of the same but untreated tobacco mixture for purposes of comparison.

Landscapes

• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Health & Medical Sciences (AREA)
• General Health & Medical Sciences (AREA)
• Toxicology (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Manufacture Of Tobacco Products (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=5687709

Family Applications (1)

Country Status (10)

Citations (1)

• 1969
  • 1969-02-13 CH CH214669A patent/CH519863A/de not_active IP Right Cessation
  • 1969-02-18 GB GB8633/69A patent/GB1248312A/en not_active Expired
  • 1969-02-20 NL NL6902702A patent/NL6902702A/xx unknown
  • 1969-02-20 US US801155A patent/US3610253A/en not_active Expired - Lifetime
  • 1969-02-21 BE BE728744D patent/BE728744A/xx unknown
  • 1969-02-21 SE SE02469/69A patent/SE354408B/xx unknown
  • 1969-02-21 NO NO0710/69A patent/NO119071B/no unknown
  • 1969-02-21 LU LU58061D patent/LU58061A1/xx unknown
  • 1969-02-21 FR FR6904586A patent/FR2002536A1/fr not_active Withdrawn
  • 1969-02-21 DK DK97469AA patent/DK125725B/da unknown

Patent Citations (1)

Non-Patent Citations (1)

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