The invention discloses an extraction method of cigar
tobacco leaf essential oil, which comprises the following steps: shredding cigar
tobacco leaf leftovers, adjusting the
water content, standing at
room temperature, freezing at -5 to -10 DEG C for 2-6 hours,
drying to constant weight, crushing and sieving, spraying an enzymolysis solution on the surface of the cigar
tobacco leaf leftovers, and then performing enzymolysis and high-temperature inactivation to obtain enzymolyzed tobacco leaves; adding the enzymolyzed tobacco leaves into a tubular furnace, heating to 120-160 DEG C under the protection of
nitrogen, keeping the temperature for 1-2 hours, slowly cooling to
room temperature, and
grinding to obtain pre-crushed cigar tobacco leaves; adding the pre-crushed cigar tobacco leaves into an ultrasonic extraction tank, adding an
organic solvent, soaking, carrying out ultrasonic extraction, and collecting an extracting solution a; adding an
organic solvent into the residual material residues, performing ultrasonic extraction, and collecting an extracting solution b; and combining the extracting solution a and the extracting solution b, concentrating under reduced pressure, keeping the
vacuum pressure of the
system at 1-1.5 kPa, and collecting fractions with the
boiling point lower than 175 DEG C to obtain the cigar tobacco leaf
essential oil. Waste in the cigar
processing process is turned into wealth, the extracted
essential oil is pure natural tobacco homologous perfume, and the defect that tobacco products are insufficient in fragrance is effectively overcome.