Tobacco essence containing reed leaf extract and preparation method thereof

Abstract

The invention relates to the technical field of tobacco flavors and fragrances, in particular to a reed leaf extract-containing tobacco flavor and a preparation method thereof. Comprising the following raw materials in parts by weight: 10-20 parts of a reed leaf extract, 7-10 parts of leaf alcohol, 3-5 parts of hexanal, 7-10 parts of linalool, 5-8 parts of leaf acetate, 2-5 parts of benzaldehyde, 4-8 parts of eucalyptus oil, 18-27 parts of propylene glycol and 16-35 parts of ethanol. The reed leaf extract is prepared by adopting an ultrasonic-assisted organic solvent extraction method; the reed leaf extract contains various natural aromatic components, so that natural and fresh reed leaf fragrance can be added to tobacco, the fragrance level of the tobacco is enriched, and the smell and smoking quality of the tobacco are improved; the antioxidant components such as flavonoids in the reed leaf extract can help to reduce free radicals generated by oxidation reaction in the storage and combustion processes of the tobacco, so that the deterioration and aging processes of the tobacco are delayed, and the quality stability of the tobacco is kept.

Description

Technical Field

[0001] The invention relates to the technical field of tobacco flavors and fragrances, and in particular to a tobacco flavor containing a rice dumpling leaf extract and a preparation method thereof. Background Art

[0002] The aroma of traditional tobacco products mainly comes from the tobacco leaves themselves and the additives used in their processing. However, as consumers' demands for the taste and aroma of tobacco products diversify, the development of tobacco flavors with unique aromas has become an important research direction in the industry. As a traditional food packaging material, the unique aroma components of zongzi leaves are widely used in the field of food flavoring. Zongzi leaves themselves contain a variety of volatile components and natural flavor substances, such as terpenes, alcohols, esters and other compounds. If they can be reasonably extracted and applied to tobacco flavors, they are expected to bring a unique and fresh natural aroma to cigarettes. At the same time, some of the natural components contained in zongzi leaves may also be able to coordinate with the flavor of tobacco itself to a certain extent, improve the smoking quality of cigarettes, reduce irritation, and increase smoking comfort. Therefore, the development of a tobacco flavor containing zongzi leaf extract is of great significance for enriching the variety of aromas of tobacco products and enhancing product competitiveness. Summary of the Invention

[0003] The purpose of the present invention is to provide a tobacco flavor containing a zongzi leaf extract. The flavor of the present invention effectively retains the aroma components of the zongzi leaf through a specific extraction and blending process, and makes the aroma components of the zongzi leaf harmoniously blended with the tobacco aroma, giving the cigarette a unique zongzi leaf aroma and excellent smoking quality.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a tobacco flavor containing zongzi leaf extract, comprising the following raw materials in the following weight proportions: 10-20 parts of zongzi leaf extract, 7-10 parts of leaf alcohol, 3-5 parts of hexanal, 7-10 parts of linalool, 5-8 parts of leaf acetate, 2-5 parts of benzaldehyde, 4-8 parts of eucalyptus oil, 18-27 parts of propylene glycol, and 16-35 parts of ethanol.

[0005] As a further limitation of the technical solution of the present invention, the preparation method of the rice dumpling leaf extract is as follows: (1) Pretreatment of raw materials: Select high-quality, pest-free zongzi leaves, wash them, and air-dry them or dry them in an oven to constant weight; (2) crushing the treated rice dumplings leaves and passing through a 20-40 mesh sieve, preferably a 40 mesh sieve; (3) The crushed zongzi leaves were extracted using microwave-assisted extraction, with a mixed solution of ethanol and water as the extractant; (4) After the extraction is completed, the filtrate is centrifuged at 10,000-15,000 r / min to remove impurities more thoroughly, and the clear liquid is taken for later use; (5) The filtrate was concentrated under reduced pressure using a vacuum distillation apparatus to recover part of the solvent, thereby obtaining a relatively thick and fragrant Zongye extract.

[0006] The present invention utilizes microwave-assisted extraction, which has the advantages of high extraction efficiency, good selectivity, low reagent usage, uniform heating, easy control, simple process, wide applicability, and batch processing capability. Existing technologies often use steam distillation or high-concentration ethanol extraction, but these methods suffer from insufficient extraction, low extraction efficiency, and turbidity caused by different solubility of the extract, making it impossible to obtain a homogeneous mixed extract. This method utilizes microwave-assisted extraction and uses low-concentration ethanol to treat the rice dumplings, avoiding the above problems.

[0007] As a further limitation of the technical solution of the present invention, the drying temperature in step (1) does not exceed 50°C.

[0008] As a further limitation of the technical solution of the present invention, in step (2), the volume fraction of ethanol in the extractant is 50%-70%, preferably, the concentration of the ethanol aqueous solution is 50%, the solid-liquid ratio is set to 1 g:8 mL-1 g:12 mL, preferably the solid-liquid ratio is 1 g:8 mL, the microwave power is 300-500 W, preferably, the microwave power is 400 W, the extraction temperature is 30°C-50°C, preferably, the extraction temperature is 40°C, and the extraction time is 15-30 min, preferably, the extraction time is 20 min.

[0009] As a further limitation of the technical solution of the present invention, the pressure of the reduced pressure concentration in step (5) is 80 hPa-120 hPa, preferably any value between 80 hPa-120 hPa, and the temperature is 40°C-60°C, preferably any value between 40°C-60°C.

[0010] As a further limitation of the technical solution of the present invention, in step (5), the filtrate is concentrated to a relative density of 1.07-1.15, preferably any value between 1.07-1.15.

[0011] The present invention also provides a method for preparing the tobacco flavor containing the zongzi leaf extract: adding propylene glycol in parts by weight to a mixing container, sequentially adding zongzi leaf extract, leaf alcohol, hexanal, linalool, leaf acetate, benzaldehyde, and eucalyptus oil in parts by weight while stirring, adding ethanol after stirring evenly, and continuing stirring for 35 minutes to obtain a uniform and stable tobacco flavor.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. Zongzi leaf extract contains a variety of natural aromatic components, such as some terpenoid compounds, alcohols, aldehydes, etc. These components have a unique aroma, which can add a natural and refreshing Zongzi leaf fragrance to tobacco, enrich the aroma level of tobacco, improve the smell and smoking quality of tobacco, and enable smokers to obtain a unique olfactory and taste experience.

[0013] 2. Tobacco produces some undesirable odors during processing and burning, such as green odor and woody odor. Certain components in the Zongye extract can mask and modify these odors, making the tobacco flavor purer and softer, and improving the overall quality of the tobacco.

[0014] 3. The antioxidant ingredients such as flavonoids in the rice dumpling leaf extract can help reduce the free radicals produced by oxidation reactions during the storage and burning of tobacco, thereby delaying the deterioration and aging process of tobacco and maintaining the quality stability of tobacco. It may also help reduce the harmful substances produced during smoking.

[0015] 4. Through the biologically active ingredients it contains, such as flavonoids, it has a certain soothing effect on the throat and respiratory tract, reducing the irritation to the throat and respiratory tract when smoking, making the smoking process more comfortable. DETAILED DESCRIPTION

[0016] The present invention will be further described below with reference to specific embodiments. Example 1

[0017] Raw materials preparation: Select 100g of fresh rice dumplings leaves, wash them, dry them at 50℃ to constant weight, grind them and pass them through a 30-mesh sieve for later use.

[0018] Prepare 7g of leaf alcohol, 3g of hexanal, 7g of linalool, 5g of leaf acetate, 2g of benzaldehyde, 4g of eucalyptus oil, 27g of propylene glycol, and 35g of ethanol.

[0019] Preparation of Zongzi leaf extract: Ultrasound-assisted organic solvent extraction was performed using a 50% ethanol-water solution as the extraction solvent at a solid-liquid ratio of 1:8 (g / mL). Extraction was performed at an ultrasonic power of 400 W and a temperature of 40°C for 20 minutes. After extraction, the filtrate was filtered and concentrated under reduced pressure at 100 hPa and 50°C to a relative density of 1.10. The organic solvent was then recovered to obtain the zongzi leaf extract.

[0020] Preparation of tobacco flavor: Add 27g of propylene glycol to a mixing container, then add 10g of zongzi leaf extract, 7g of leaf alcohol, 3g of hexanal, 7g of linalool, 5g of leaf acetate, 2g of benzaldehyde, and 4g of eucalyptus oil in sequence while stirring. After stirring evenly, slowly add 35g of ethanol and continue stirring for 35 minutes to obtain a uniform and stable tobacco flavor Z1. Z1 is applied to blank cut tobacco at a ratio of 0.08%. Additional distilled water is added to the cut tobacco to a moisture content of 20% + 1%. After sealing and storing for 2 hours, the cut tobacco is dried in an oven at 120-130°C to a moisture content of 12% + 0.5%. The sample after hand-rolling is designated M1. Example 2

[0021] Raw materials preparation: Select 80g of dried rice dumplings leaves, crush them through a 20-mesh sieve and set aside.

[0022] Prepare 10g of leaf alcohol, 5g of hexanal, 10g of linalool, 8g of leaf acetate, 5g of benzaldehyde, 8g of eucalyptus oil, 18g of propylene glycol, and 16g of ethanol.

[0023] Preparation of Zongzi leaf extract: A 60% volume fraction of ethanol aqueous solution was used as the extraction solvent, the solid-liquid ratio was 1:10 (g / mL), the ultrasonic power was 300W, and the temperature was 45°C for extraction for 30 minutes. Subsequently, the extraction was carried out in the same manner, and the filtrate was concentrated under reduced pressure at an air pressure of 80hPa and a temperature of 40°C until the relative density was 1.08. The solvent was recovered to obtain the rice dumpling leaf extract.

[0024] Preparation of tobacco flavor: First, add 18g of propylene glycol to a mixing container, then stir in 20g of zongzi leaf extract, 7g of leaf alcohol, 3g of hexanal, 7g of linalool, 5g of leaf acetate, 2g of benzaldehyde, and 4g of eucalyptus oil. After stirring evenly, add 35g of ethanol and continue stirring for 35 minutes to prepare tobacco flavor Z2. Z2 is applied to blank cut tobacco at a ratio of 0.08%. Additional distilled water is added to the cut tobacco to a moisture content of 20% + 1%. After sealing and storing for 2 hours, the cut tobacco is dried in an oven at 120-130°C to a moisture content of 12% + 0.5%. The sample after hand-rolling is recorded as M2.

[0025] Comparative Example 1 A conventional tobacco flavoring formulation and preparation method was used, without the addition of zongzi leaf extract. Instead, 7g of leaf alcohol, 3g of hexanal, 7g of linalool, 5g of leaf acetate, 2g of benzaldehyde, 4g of eucalyptus oil, 27g of propylene glycol, and 35g of ethanol were used, with the ethanol making up to 100g. Propylene glycol was added to the container in sequence, and the mixture of 7g of leaf alcohol, 3g of hexanal, 7g of linalool, 5g of leaf acetate, 2g of benzaldehyde, 4g of eucalyptus oil, 27g of propylene glycol, and 35g of ethanol was stirred for 50 minutes to produce the control tobacco flavoring Z3. Z3 was applied to blank cut tobacco at a ratio of 0.08%. Additional distilled water was added to the tobacco to bring the moisture content to 20% ± 1%. After being sealed and stored for 2 hours, the tobacco was oven-dried at 120-130°C to a moisture content of 12% ± 0.5%. The hand-rolled cigarette sample was designated M3.

[0026] Comparative Example 2 Using the same raw materials as in Example 1, but modifying the preparation process of the zongzi leaf extract, a traditional Soxhlet extraction method (using petroleum ether as the extraction solvent for approximately 6 hours) was used to prepare the zongzi leaf extract. Tobacco flavor Z4 was then prepared according to the subsequent blending steps for the tobacco flavor in Example 1. Z3 was applied to blank shredded tobacco at a ratio of 0.08%. Distilled water was added to the shredded tobacco to a moisture content of 20% ± 1%. After sealed and stored for 2 hours, the shredded tobacco was dried in an oven at 120-130°C to a moisture content of 12% ± 0.5%. The hand-rolled cigarette sample was designated M4.

[0027] Blank control The blank tobacco was supplemented with distilled water to make the moisture content of the tobacco 20% + 1%. After being sealed and stored for 2 hours, it was dried in an oven at 120-130 ° C to a moisture content of 12% + 0.5%. The sample after hand-rolling was recorded as M0.

[0028] Ten professional smokers conducted sensory evaluations on the cigarette samples M1-M4 after adding additives in the above examples and comparative examples, as well as the blank control cigarette sample M0. The results of sensory quality, style characteristics, etc. are shown in Table 1: Table 1 Sensory evaluation table

[0029] According to the expert smoking evaluation results, the various examples of the zongzi leaf flavoring were superior to the blank sample in terms of enriching the tobacco aroma, softening the smoke, reducing irritation, improving oral comfort, and increasing the smoothness of the smoke, indicating that the zongzi leaf flavoring plays a significant role in improving the above-mentioned problems of cigarettes. In summary, the zongzi leaf flavoring proposed in the present invention can enrich the tobacco aroma, soften the smoke, reduce irritation, improve oral comfort, and increase the smoothness of the smoke, with good application effects and good universality.

[0030] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A tobacco flavoring containing Zongzi leaf extract, characterized in that, The invention comprises the following raw materials in proportions by weight: 10-20 parts of zongzi leaf extract, 7-10 parts of leaf alcohol, 3-5 parts of hexanal, 7-10 parts of linalool, 5-8 parts of leaf acetate, 2-5 parts of benzaldehyde, 4-8 parts of eucalyptus oil, 18-27 parts of propylene glycol and 16-35 parts of ethanol.

2. A tobacco flavoring containing Zongzi leaf extract according to claim 1, characterized in that, The preparation method of the rice dumpling leaf extract is as follows: (1) Pretreatment of raw materials: Select high-quality, pest-free zongzi leaves, wash them, and air-dry them or dry them in an oven to constant weight; (2) Crush the processed rice dumplings leaves and pass through a 20-40 mesh sieve; (3) The crushed zongzi leaves were extracted using microwave-assisted extraction, with a mixed solution of ethanol and water as the extractant; (4) After the extraction is completed, the filtrate is centrifuged at 10,000-15,000 r / min to remove impurities more thoroughly, and the clear liquid is collected for later use; (5) The filtrate was concentrated under reduced pressure using a vacuum distillation apparatus to recover part of the solvent, thereby obtaining a relatively thick and fragrant Zongye extract.

3. A tobacco flavoring containing Zongzi leaf extract according to claim 2, characterized in that, The drying temperature in step (1) does not exceed 50°C.

4. A tobacco flavoring containing Zongzi leaf extract according to claim 2, characterized in that, In step (2), the volume fraction of ethanol in the extractant is 50%-70%, the material-liquid ratio is 1 g:8 mL-1 g:12 mL, the microwave power is 300-500 W, the extraction temperature is 30°C-50°C, and the extraction time is 15-30 min.

5. A tobacco flavoring containing Zongzi leaf extract according to claim 2, characterized in that, The pressure of the reduced pressure concentration in step (5) is 80hPa-120hPa, and the temperature is 40°C-60°C.

6. A tobacco flavoring containing Zongzi leaf extract according to claim 2, characterized in that, In step (5), the filtrate is concentrated to a relative density of 1.07-1.

15.

7. The method for preparing a tobacco flavoring containing Zongzi leaf extract according to claim 2, wherein: Add propylene glycol in parts by weight into a mixing container, and add rice dumpling leaf extract, leaf alcohol, hexanal, linalool, leaf acetate, benzaldehyde, and eucalyptus oil in parts by weight in sequence while stirring. After stirring evenly, add ethanol and continue stirring for 35 minutes to obtain a uniform and stable tobacco flavor.

Images