CN104432477A - Method for processing cut stems of middle and top grade cigarettes - Google Patents

Abstract

The invention discloses a method for processing cut stems for medium and high-grade tobacco, which belongs to the technical field of cut stem processing. After using the method of the present invention to purify the cut stems, the appearance of the cut stems remains good, and at the same time, the amount of tar released from the cut stems is reduced, the soluble substances in the cut stems are removed, and then the tobacco powder extract is supplemented by adding materials and backfilling , to improve the sensory quality of shredded stems, and can be well used in high-end cigarette formulations.

Description

A method for processing medium and high-grade cut tobacco stems

technical field

The invention belongs to the technical field of cut stem processing, and in particular relates to a method for processing cut cut stems for medium and high-grade tobacco.

Background technique

Tobacco is a plant of the genus Nicotiana in the family Solanaceae. The shredded stalk is the thick and hard vein of the tobacco leaf, accounting for about 25% to 30% of the leaf weight. It can be added to cigarettes after being shredded. In middle-to-high-end cigarette production enterprises (the tobacco industry divides cigarettes into five categories, which are divided according to the allocation price of cigarettes. Here, medium-to-high-end cigarettes refer to first- and second-class cigarettes), because the cut stems contain unfavorable smoke, taste and Combustible cell wall substances, so its addition is very small and cannot be fully utilized. As a big tobacco producing country, my country produces about 2.4 million tons of tobacco leaves each year, and about 600,000 tons of tobacco stems can be produced, of which about 400,000 tons of tobacco stems can be effectively used, and about 320,000 tons of tobacco stems are used for processing shredded stems. There are about 80,000 tons of tobacco stems for making tobacco sheets, and about hundreds of thousands of tons of shredded stems are discarded and wasted. The development of "high aroma, low tar, low harm" cigarettes is the development direction of my country's cigarette products. As a common blending product in cigarette products, shredded stems have the advantages of high filling capacity, good flammability, tar production in smoke, and relatively low hazard. It can be used in high-end cigarette products to effectively control the harmful effects of cigarettes. Composition and tar release. The content of total sugar, total nitrogen, nicotine and tar in tobacco stems is low, and the content of cell wall substances is relatively high (about 43%). Small, heavy miscellaneous gas, especially woody gas. At the same time, because the cut stems are whitish in color after drying, the color is not harmonious after being blended with the shredded leaves, which affects the appearance of the rolled cigarettes. Therefore, the defects in the tobacco stem itself limit its addition ratio in middle and high-grade cigarettes. With the development of biotechnology, many researchers began to use enzymes and microorganisms to change the smoking quality of inferior tobacco leaves or improve the utilization value of tobacco stems.

In the prior art, most of the cut stems are directly processed, but due to the compact structure of the cut stems, the effect of direct enzymatic hydrolysis of the cut stems by the conventional enzyme preparation is not significant. If the effective substances in the tobacco stems can be extracted and properly processed to remove the soluble substances in the shredded stems, the purpose of purifying the shredded stems can be achieved. Then backfill by adding materials to supplement the extract and improve the sensory quality of the shredded stems. In this way, not only the quality of the shredded stems can be improved, but also the shredded stems can be more fully utilized.

Subcritical extraction is to use subcritical fluid as the extraction agent, in a closed, oxygen-free, low-pressure pressure vessel, according to the principle of similar solubility of organic matter, through the molecular diffusion process of the extraction material and the extraction agent during the soaking process, to reach the solid material It is a new extraction and separation technology that transfers the soluble components in the liquid to the liquid extractant, and then separates the extractant from the target product through the process of vacuum evaporation, and finally obtains the target product. Subcritical fluid refers to the substance that some compounds exist in liquid form under the condition that the temperature is higher than its boiling point but lower than the critical temperature, and the pressure is lower than its critical pressure. There are mainly propane, butane, isobutane, tetrafluoroethane (R134a), dimethyl ether, sulfur hexafluoride, dichlorodifluoromethane (Freon R12) and monochlorodifluoromethane (Freon R22), etc. A substance that is gaseous when compressed, and is easily liquefied by pressurization or cooling.

Contents of the invention

The object of the present invention is to provide a method for processing cut stems for medium and high-grade tobacco.

Based on above-mentioned purpose, the present invention has taken following technical scheme:

A method for processing cut stems for medium and high-grade cigarettes, comprising the following steps: packing the cut stems under the premise of ensuring the whole cut ratio, placing the whole in a closed extraction container, injecting a liquid extraction solvent with a certain pressure into the container, Submerge the shredded stem completely, extract for 30-50 minutes, the extraction temperature is 10-60°C; the extraction solvent is propane, butane, isobutane, tetrafluoroethane, dimethyl ether, sulfur hexafluoride, dichlorodifluoro One or more mixtures of methane and chlorodifluoromethane; after the extraction, during the process of removing the solvent, the temperature in the extraction vessel is kept at 10-60°C, and after the liquid solvent is drawn out from the lower part of the vessel, the The vaporized solvent is extracted from the upper part of the container, and after the solvent in the cut stems is completely removed, the cut stem bag is taken out from the container as a whole; After completion, the cut stems are expanded, dried, flavored and sieved, and then added to middle and high-grade cigarettes in a proportion of 3-5wt%. The tar content and smoke nicotine content of finished cigarettes are lower than those of cigarettes without cut stems, and are better than cigarettes without cut stems in terms of aroma, fullness, fluency and strength of smoke.

After using the method of the invention to purify the cut stems, the appearance and shape of the cut stems are kept good, while the amount of tar released in the cut stems is reduced, and the soluble substances in the cut stems are removed. Then by adding and backfilling, the tobacco powder extract is supplemented, the sensory quality of the cut stems is improved, and it can be well used for addition in high-grade cigarette formulas.

Detailed ways

The technical solutions of the present invention will be described in further detail below in conjunction with specific examples, but the protection scope of the present invention is not limited thereto.

Example 1: Take 1000 kg of shredded stems, pack them under the condition of ensuring the whole shredded stems, place the whole in a closed extraction container, inject liquid butane extraction solvent, completely submerge the shredded stems, and extract for 30~ 50 minutes, the extraction temperature is 10~60°C; after the extraction, during the process of removing the solvent, the temperature in the extraction container is kept at 10~60°C, after the liquid solvent is drawn from the lower part of the container, the vaporized After the solvent in the shredded stems is completely removed, the shredded stems package is taken out from the container as a whole. The outlet moisture in the cut stem feeding process is 37%, the outlet temperature is 55°C, and the feeding ratio is 2.3wt%; the hot air temperature in the cut stem drying process is 235°C, and the outlet moisture is 13.5%; Silk is added to medium and high-grade cigarettes according to the blending ratio of 5wt%. Compared with the finished cigarettes without shredded stems after rolling, the tar content of cigarettes decreased by 0.31mg/cigarette, the amount of nicotine in smoke decreased by 0.04mg/cigarettes, and the total score of sensory quality increased by 0.27 points, mainly manifested in the improvement of aroma and aftertaste. Increased comfort.

Example 2: Take 1000 kg of shredded stems, pack it under the condition of ensuring the whole shredded ratio of the cut stems, place it in a closed extraction container as a whole, inject liquid propane extraction solvent, completely submerge the shredded stems, and extract for 35-45 Minutes, the extraction temperature is 30-50°C; after the extraction is completed, during the process of removing the solvent, the temperature in the extraction container is maintained at 30-50°C, after the liquid solvent is drawn out from the lower part of the container, the vaporized gas is drawn from the upper part of the container Solvent, after the solvent in the shredded stems is completely removed, the shredded stems package is taken out from the container as a whole. The outlet moisture in the cut stem feeding process is 36%, the outlet temperature is 50°C, and the feeding ratio is 2.0wt%; the hot air temperature in the cut stem drying process is 245°C, and the outlet moisture is 13.2%; Silk is added to medium and high-grade cigarettes according to the blending ratio of 3wt%. Compared with the finished cigarettes without shredded stems after rolling, the tar content of cigarettes is reduced by 0.23mg/cigarette, the amount of nicotine in smoke is reduced by 0.03mg/cigarettes, and the total score of sensory quality is increased by 0.29 points, mainly manifested as miscellaneous gas and irritation Sexiness is slightly reduced, and the aftertaste comfort is increased.

Example 3: Take 1000 kg of shredded stems, pack it under the condition of ensuring the whole shredded ratio of the cut stems, place the whole in a closed extraction container, inject liquid dimethyl ether extraction solvent, completely submerge the shredded stems, and extract for 35 -45 minutes, the extraction temperature is 30-50°C; after the extraction is completed, during the process of removing the solvent, the temperature in the extraction container is maintained at 30-50°C, after the liquid solvent is drawn from the lower part of the container, the gas is drawn from the upper part of the container After the solvent in the shredded stems is completely removed, the shredded stems package is taken out from the container as a whole. The outlet moisture in the cut stem feeding process is 36%, the outlet temperature is 50°C, and the feeding ratio is 2.5wt%; the hot air temperature in the cut stem drying process is 245°C, and the outlet moisture is 13.2%; Silk is added to medium and high-grade cigarettes according to the blending ratio of 5wt%. Compared with the finished cigarettes without shredded stems after rolling, the tar content of cigarettes is reduced by 0.32mg/cigarette, the amount of nicotine in smoke is reduced by 0.05mg/cigarettes, and the total score of sensory quality is increased by 0.26 points, mainly manifested in the improvement of aroma and aftertaste. Increased comfort.

Example 4: Take 1000 kg of cut stems, pack them under the condition of ensuring the whole cut stems, place the whole in a closed extraction container, inject liquid 1,1,1,2-tetrafluoroethane extraction solvent, Submerge the shredded stems completely, extract for 50 minutes, and the extraction temperature is 30°C; The vaporized solvent is drawn out, and after the solvent in the shredded stems is completely removed, the shredded stems package is taken out from the container as a whole. The outlet moisture in the cut stem feeding process is 36%, the outlet temperature is 45°C, and the feeding ratio is 2.3wt%; the hot air temperature in the cut stem drying process is 240°C, and the outlet moisture is 13.3%; Silk is added to medium and high-grade cigarettes according to the blending ratio of 3wt%. Compared with the finished cigarettes without shredded stems after rolling, the tar content of cigarettes is reduced by 0.25mg/cigarette, the amount of nicotine in smoke is reduced by 0.03mg/cigarettes, and the total score of sensory quality is increased by 0.32 points, mainly manifested as miscellaneous gas and irritation Sex is slightly reduced.

Example 5: Take 1000 kg of shredded stems, pack it under the condition of ensuring the whole shredded ratio of the cut stems, place it in a closed extraction container as a whole, inject liquid sulfur hexafluoride extraction solvent, completely submerge the shredded stems, and extract 30 minutes, the extraction temperature is 50°C; after the extraction is completed, during the process of removing the solvent, the temperature in the extraction container is kept at 50°C, and after the liquid solvent is drawn out from the lower part of the container, the vaporized solvent is drawn out from the upper part of the container. After the solvent in the shreds is completely removed, the shredded stem package is taken out from the container as a whole. The outlet moisture in the cut stem feeding process is 37%, the outlet temperature is 55°C, and the feeding ratio is 2.5wt%; the hot air temperature in the cut stem drying process is 235°C, and the outlet moisture is 13.5%; Silk is added to medium and high-grade cigarettes according to the blending ratio of 3wt%. Compared with the finished cigarettes without shredded stems after rolling, the tar content of cigarettes is reduced by 0.23mg/cigarette, the amount of nicotine in smoke is reduced by 0.04mg/cigarettes, and the total score of sensory quality is increased by 0.30 points, mainly manifested as miscellaneous gas and irritation Sex is slightly reduced.

Example 6: Take 1000 kg of shredded stems, pack it under the condition of ensuring the whole shredded ratio of stems, and place it in a closed extraction container as a whole, inject a mixture of liquid propane and butane as an extraction solvent of liquefied petroleum gas, and extract the stems The silk is completely submerged, extracted for 50 minutes, and the extraction temperature is 40°C; after the extraction is completed, during the process of removing the solvent, the temperature in the extraction container is kept at 40°C, after the liquid solvent is drawn from the lower part of the container, the gas is drawn from the upper part of the container After the solvent in the shredded stems is completely removed, the shredded stems package is taken out from the container as a whole. The outlet moisture in the cut stem feeding process is 37%, the outlet temperature is 55°C, and the feeding ratio is 2.3wt%; the hot air temperature in the cut stem drying process is 245°C, and the outlet moisture is 13.2%; Silk is added to medium and high-grade cigarettes according to the blending ratio of 5wt%. Compared with the finished cigarettes without shredded stems after rolling, the tar content of cigarettes decreased by 0.36mg/cigarette, the amount of nicotine in smoke decreased by 0.06mg/cigarettes, and the total score of sensory quality increased by 0.22 points, mainly manifested in the increase of aftertaste comfort .

What are listed above are only a few specific embodiments for realizing the present invention. Obviously, the present invention is not limited to the above embodiments, and many variations are possible. All deformations that can be directly derived or associated by those skilled in the art from the content disclosed in the present invention should be considered as the protection scope of the present invention.

Claims (1)

1. A method for processing cut stems for medium and high-grade tobacco, which is characterized in that it includes the following steps: packing the cut stems under the premise of ensuring the whole cut ratio, placing the whole in a closed extraction container, and injecting the liquid extraction liquid into the container. Solvent, immerse the cut stems completely, extract for 30-50 minutes, the extraction temperature is 10-60°C; the extraction solvents are propane, butane, isobutane, tetrafluoroethane, dimethyl ether, sulfur hexafluoride, dichloro One or more mixtures of difluoromethane and chlorodifluoromethane; after the extraction, during the process of removing the solvent, the temperature in the extraction vessel is kept at 10-60°C, after the liquid solvent is drawn out from the lower part of the vessel , extract the vaporized solvent from the upper part of the container, after the solvent in the shredded stems is completely removed, take out the shredded stems package from the container as a whole; after the shredded stems are extracted, feed the shredded stems at a ratio of 2.0-2.5wt% After the feeding is completed, the cut stems are expanded, dried, flavored, and sieved, and then added to medium and high-grade cigarettes in a proportion of 3-5wt%.