CN113115970A - Preparation method of reconstituted tobacco with low lignin content - Google Patents
Preparation method of reconstituted tobacco with low lignin content Download PDFInfo
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- CN113115970A CN113115970A CN202110363345.3A CN202110363345A CN113115970A CN 113115970 A CN113115970 A CN 113115970A CN 202110363345 A CN202110363345 A CN 202110363345A CN 113115970 A CN113115970 A CN 113115970A
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- reconstituted tobacco
- lignin content
- tobacco
- low lignin
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B3/00—Preparing tobacco in the factory
- A24B3/10—Roasting or cooling tobacco
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- 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
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B3/00—Preparing tobacco in the factory
- A24B3/04—Humidifying or drying tobacco bunches or cut tobacco
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B3/00—Preparing tobacco in the factory
- A24B3/12—Steaming, curing, or flavouring tobacco
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B3/00—Preparing tobacco in the factory
- A24B3/18—Other treatment of leaves, e.g. puffing, crimpling, cleaning
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B7/00—Cutting tobacco
Abstract
The invention belongs to the field of reconstituted tobacco, and particularly relates to a preparation method of reconstituted tobacco with low lignin content. The preparation method of the reconstituted tobacco with low lignin content comprises the following steps: soaking a mixed raw material consisting of tobacco stems and tobacco powder in water, carrying out solid-liquid separation, carrying out solvothermal reaction on a solid substance obtained by the solid-liquid separation in polyhydric alcohol at 130-200 ℃, and carrying out solid-liquid separation to obtain a solid raw material with low lignin content; mixing the solid raw material with low lignin content and the added fiber, grinding into slurry, making into paper-making reconstituted tobacco paper base, coating the paper-making reconstituted tobacco paper base with the coating solution, drying, and cutting. The preparation method of the reconstituted tobacco with low lignin content effectively reduces the lignin content in the tobacco shreds of the reconstituted tobacco, improves the taste and improves the smoking comfort of the reconstituted tobacco.
Description
Technical Field
The invention belongs to the field of reconstituted tobacco, and particularly relates to a preparation method of reconstituted tobacco with low lignin content.
Background
The reconstituted tobacco is prepared by processing tobacco powder, fragments, tobacco stems or stems and the like in the cigarette production process by different processing methods to prepare the reconstituted tobacco with the shape close to that of tobacco leaves, and is applied to cigarette production. The tobacco stems are utilized to produce the reconstituted tobacco, so that the raw material utilization can be maximized, the raw material cost can be reduced, and obvious help is provided for tar reduction and harm reduction.
The preparation process of the reconstituted tobacco leaves generally comprises a rolling method and a paper-making method, and the paper-making method is commonly used at present. No matter the reconstituted tobacco is prepared by a rolling method or a papermaking method, the production process does not basically involve chemical changes, so that the content of lignin macromolecules in the reconstituted tobacco does not change greatly compared with the content of raw materials, and the irritation and/or wood miscellaneous gas affecting the sensory quality are caused (the rest of the China tobacco science reports, 2018, 24(4), 1-6).
In the prior art, Chinese patent application with publication number CN 102217784A discloses a flue-cured tobacco type high smoke concentration paper-making method reconstituted tobacco and a manufacturing method thereof, and the flue-cured tobacco type high smoke concentration paper-making method reconstituted tobacco adopts lower extraction temperature, longer extraction time and larger coating amount, so that the smoke concentration and strength are obviously improved; the Chinese patent application with the publication number of CN 101966007A discloses a manufacturing method of mixed paper-making reconstituted tobacco, wherein a Maillard reaction catalyst is added into extract liquor to improve the aroma of smoke; the Chinese patent application with the publication number of CN 104382218A discloses a preparation method of paper-making reconstituted tobacco and the reconstituted tobacco, five sections of flexible pulping treatment are adopted, the damage of fine tobacco flakes in the pulping process is reduced, the thousand-digit length is reserved, and the physical performance of the reconstituted tobacco is improved. The methods all adopt water to carry out pretreatment (namely extraction) on the reconstituted tobacco raw materials (tobacco stems and the like), and do not solve the problems of irritation of the tobacco stems and heavy wood miscellaneous gas from the root.
Disclosure of Invention
The invention aims to provide a preparation method of reconstituted tobacco with low lignin content, which aims to solve the problems of tobacco stem irritation and heavy wood gas in the conventional reconstituted tobacco.
In order to realize the aim, the technical scheme of the preparation method of the reconstituted tobacco with low lignin content is as follows:
a preparation method of reconstituted tobacco with low lignin content comprises the following steps: soaking a mixed raw material consisting of tobacco stems and tobacco powder in water, carrying out solid-liquid separation, carrying out solvothermal reaction on a solid substance obtained by the solid-liquid separation in polyhydric alcohol at 130-200 ℃, and carrying out solid-liquid separation to obtain a solid raw material with low lignin content;
mixing the solid raw material with low lignin content and the added fiber, grinding into slurry, making into paper-making reconstituted tobacco paper base, coating the paper-making reconstituted tobacco paper base with the coating solution, drying, and cutting.
The preparation method of the reconstituted tobacco with low lignin content effectively reduces the lignin content in the tobacco shreds of the reconstituted tobacco, improves the taste and improves the smoking comfort of the reconstituted tobacco. Meanwhile, the method has the advantages of simple process, strong controllability, stable quality, close combination with the existing reconstituted tobacco production line, and good adaptability of production procedures, and can be widely applied to the production of the paper-making reconstituted tobacco of each enterprise.
In order to better consider the cost of the raw materials and the smoking taste of the reconstituted tobacco, the weight proportion of the tobacco stems in the mixed raw materials is preferably 30-80%. More preferably 40 to 60%. The stems are typically in the form of shredded stems.
The cell walls of the tobacco powder and the tobacco stems can be infiltrated by the impregnation treatment, so that good conditions are created for the subsequent solvent heat treatment, and the solvent heat treatment effect is optimized. Preferably, the time of the dipping treatment is 3-10 min. In the dipping treatment process, the mass ratio of the mixed raw materials to water is 1: 5-15; more preferably 1: 10; the water temperature does not exceed 40 ℃.
The solvothermal reaction temperature is preferably 160 to 180 ℃ from the viewpoint of solvothermal reaction efficiency and reaction effect. The solvent thermal reaction time is preferably 30-120 min. More preferably 60min to 90 min.
Preferably, the polyol is selected from propylene glycol and/or glycerol. The glycerol and/or the glycerin are/is also a common solvent in the production process of the reconstituted tobacco, and the production cost is not influenced on the premise of improving the mouthfeel. In view of optimizing the solvothermal reaction efficiency, it is preferable that the amount of the polyol to be used is 300 to 500L per 50kg of the solid matter obtained by the solid-liquid separation in the solvothermal reaction.
The addition of the additional fibers can ensure the forming of the paper base, and preferably, the mass of the additional fibers is 8-14% of that of the solid raw material with low lignin content. More preferably 10 to 12%. The mass of the added fiber is referred to as dry mass.
Preferably, the additional fibers are wood pulp fibers. The reconstituted tobacco paper base is prepared by adopting a papermaking method, and the absolute dry basis weight of the paper base is 55-63g/m2Preferably 58 to 60g/m2。
Preferably, after the impregnation treatment, solid-liquid separation is carried out to obtain a first filtrate; carrying out solid-liquid separation after the solvothermal reaction to obtain a second filtrate, and distilling the second filtrate to recover the polyhydric alcohol; the dip-coating liquid is first filtrate or mixed liquid of the first filtrate and polyalcohol. The distillation temperature can be controlled to be 180-190 ℃, preferably 182-187 ℃, and the polyol obtained after distillation can be used for subsequent coating and can also be used for solvent thermal reaction for repeated use. The mass fraction of the polyhydric alcohol in the mixed solution is not more than 35 percent. The first filtrate may backfill a portion of the dissolved tobacco material into the paper substrate. The polyol used for backfilling mainly acts as an atomizing agent, and avoids the taste of the tobacco from being diluted by too high content.
Preferably, the coating weight of the dip-coating liquid is 30-50% of the weight of the reconstituted tobacco paper base. More preferably from 38% to 40%. The weight of the reconstituted tobacco paper base is based on the absolute dry weight of the paper base.
The drying is preferably drying, the drying temperature can be 50-80 ℃, preferably 60 ℃, and the drying is carried out until the moisture content of the reconstituted tobacco is 11-12%. The width of the cut threads at slitting can be 0.8mm to 1.2mm, preferably 0.9mm to 1.1 mm.
Drawings
FIG. 1 is a technical route of the preparation method of the reconstituted tobacco with low lignin content.
Detailed Description
The present invention will be further described with reference to the following specific examples. In the following examples, "%" means mass% unless otherwise specified.
First, the embodiment of the preparation method of the reconstituted tobacco with low lignin content
Example 1
The preparation method of the reconstituted tobacco with low lignin content in the embodiment, as shown in fig. 1, comprises the following steps:
(1) taking 50kg of mixed raw material consisting of tobacco stems and tobacco powder (the content of the tobacco stems is 40 percent), crushing, washing with 500L of water for 3min at normal temperature, and filtering to obtain a solid substance 1 and a filtrate 1.
(2) And (2) carrying out solvent thermal reaction on the solid matter 1 obtained in the step (1) and 300L of propylene glycol in a container at 180 ℃ for 60min, and filtering to obtain a solid matter 2 and a filtrate 2.
(3) Mixing the solid substance 2 obtained in the step (2) with softwood pulp, grinding the mixture into pulp (the dry mass of wood pulp fibers accounts for 12 percent of the weight of the solid substance 2), and papermaking in a paper machine to obtain a reconstituted tobacco paper base, wherein the paper base is paperThe absolute dry basis weight is 60g/m2。
(4) And (3) distilling the filtrate 2 in the step (3) at the temperature of 187 ℃, cooling the distillate, mixing part of the distillate with the filtrate 1 in the step (2) to obtain a dip-coating solution, and recycling part of the dip-coating solution as the solvent in the step (2). The distillate is propylene glycol, and the mass fraction of the propylene glycol in the dip coating liquid is 30%.
(5) And (4) coating the dip-coating liquid in the step (4) on a reconstituted tobacco paper base, wherein the coating amount is 38% of the weight of the reconstituted tobacco paper base, drying at 60 ℃ until the water content of the reconstituted tobacco is 12%, and cutting to reconstituted tobacco shreds with the width of 1mm to obtain the product 1.
Example 2
The preparation method of the reconstituted tobacco with low lignin content comprises the following steps:
(1) taking 50kg of mixed raw material consisting of tobacco stems and tobacco powder (the content of the tobacco stems is 50 percent), crushing, washing with 400L of water for 3min at normal temperature, and filtering to obtain a solid substance 1 and a filtrate 1.
(2) And (2) carrying out solvothermal reaction on the solid substance 1 obtained in the step (1) and 400L of glycerol in a 160 ℃ container at the reaction time of 80min, and filtering to obtain a solid substance 2 and a filtrate 2.
(3) Mixing the solid substance 2 obtained in the step (2) with masson pine fiber pulp, grinding into slurry (wood pulp fiber accounts for 10%), and making into reconstituted tobacco paper base in a paper machine, wherein the absolute dry weight of the paper base is 59g/m2。
(4) And (3) distilling the filtrate 2 in the step (2) at the temperature of 182 ℃, cooling the distillate, and mixing the cooled distillate with the filtrate 1 in the step (2) to obtain the dip-coating solution. The distillate is glycerol, and the mass fraction of the glycerol in the dip coating liquid is 35%.
(5) And (4) coating the dip-coating liquid in the step (4) on the paper base, wherein the coating amount is 40% of the weight of the reconstituted tobacco paper base, drying at 50 ℃ until the water content of the reconstituted tobacco is 12%, and cutting to reconstituted tobacco shreds with the width of 1mm to obtain the product 2.
Example 3
The preparation method of the reconstituted tobacco with low lignin content comprises the following steps:
(1) taking 50kg of mixed raw material consisting of tobacco stems and tobacco powder (the content of the tobacco stems is 60 percent), crushing, washing with 350L of water for 3min at normal temperature, and filtering to obtain a solid substance 1 and a filtrate 1;
(2) carrying out solvothermal reaction on the solid substance 1 obtained in the step (1) and 500L (the volume ratio of the propylene glycol to the glycerol is 1:1) of a mixture of the propylene glycol and the glycerol in a container tank at 170 ℃, wherein the reaction time is 70min, and filtering to obtain a solid substance 2 and a filtrate 2;
(3) mixing the solid substance 2 obtained in the step (2) with masson pine fiber pulp, grinding into slurry (wood pulp fiber accounts for 11%), and papermaking in a paper machine to obtain a reconstituted tobacco paper base, wherein the absolute dry weight of the paper base is 61g/m2。
(4) And (3) distilling the filtrate 2 in the step (2) at the temperature of 187 ℃, cooling the distillate, and mixing the distillate with the filtrate 1 in the step (2) to obtain the dip-coating solution. The distillate is polyhydric alcohol consisting of propylene glycol and glycerol, and the mass fraction of the polyhydric alcohol in the dip coating liquid is 25%.
(5) And (4) coating the dip-coating liquid in the step (4) on the paper base, wherein the coating amount is 39% of that of the reconstituted tobacco paper base, drying at 60 ℃ until the water content of the reconstituted tobacco is 11%, and cutting to reconstituted tobacco shreds with the width of 1mm to obtain a product 3.
Second, comparative example
Comparative example 1
The preparation method of the reconstituted tobacco of the comparative example comprises the following steps:
(1) crushing 50kg of mixed raw material consisting of tobacco stems and tobacco powder (the content of the tobacco stems is 50%), washing with 300L of water for 3min at normal temperature, and filtering to obtain solid substances and filtrate;
(2) mixing the solid substance obtained in the step (1) with masson pine fiber pulp, grinding into slurry (wood pulp fiber accounts for 11%), and papermaking in a paper machine to obtain a reconstituted tobacco paper base, wherein the absolute dry weight of the paper base is 61g/m2。
(3) And (3) coating the filtrate on the paper base in the step (2), controlling the coating amount to be 39%, drying at 60 ℃ until the water content of the reconstituted tobacco is 11%, and cutting to reconstituted tobacco shreds with the width of 1mm to obtain a product 4.
Third, Experimental example
Examples of the experiments
In the experiment, the lignin content of the reconstituted tobacco shred products in the examples 1-3 and the comparative example is determined, and the test results are shown in the table 1, wherein the lignin content is determined by adopting the YC/T347-.
TABLE 1 measurement results of lignin content in reconstituted tobacco shred products
Compared with the comparative example, the invention effectively reduces the lignin content in the reconstituted tobacco cut tobacco, obviously improves the taste after the reconstituted tobacco is rolled into cigarettes, improves the smoking comfort of the reconstituted tobacco and provides technical support for low-lignin tobacco products.
Claims (10)
1. The preparation method of the reconstituted tobacco with low lignin content is characterized by comprising the following steps: soaking a mixed raw material consisting of tobacco stems and tobacco powder in water, carrying out solid-liquid separation, carrying out solvothermal reaction on a solid substance obtained by the solid-liquid separation in polyhydric alcohol at 130-200 ℃, and carrying out solid-liquid separation to obtain a solid raw material with low lignin content;
mixing the solid raw material with low lignin content and the added fiber, grinding into slurry, making into paper-making reconstituted tobacco paper base, coating the paper-making reconstituted tobacco paper base with the coating solution, drying, and cutting.
2. The method for preparing the reconstituted tobacco with low lignin content according to claim 1, comprising the following steps: the weight proportion of the tobacco stems in the mixed raw materials is 30-80%.
3. The method for preparing the reconstituted tobacco with low lignin content according to claim 1 or 2, wherein the time of the dipping treatment is 3-10 min.
4. The method for preparing the reconstituted tobacco with low lignin content according to claim 1, wherein the solvothermal reaction time is 30-120 min.
5. The method for preparing reconstituted tobacco with low lignin content according to claim 1, wherein the polyol is selected from propylene glycol and/or glycerol.
6. The method for preparing the reconstituted tobacco with low lignin content according to claim 1, 4 or 5, wherein during the solvothermal reaction, the amount of the polyol used is 300-500L per 50kg of solid matter obtained by solid-liquid separation.
7. The method for preparing the reconstituted tobacco with low lignin content according to claim 1, wherein the mass of the additional fiber is 8-14% of the mass of the solid raw material with low lignin content.
8. The method for preparing reconstituted tobacco with low lignin content according to claim 1 or 7, wherein the additional fibers are wood pulp fibers.
9. The method for preparing the reconstituted tobacco with low lignin content according to claim 1, wherein solid-liquid separation is performed after the dipping treatment to obtain a first filtrate; carrying out solid-liquid separation after the solvothermal reaction to obtain a second filtrate, and distilling the second filtrate to recover the polyhydric alcohol; the dip-coating liquid is first filtrate or mixed liquid of the first filtrate and polyalcohol.
10. The method for preparing the reconstituted tobacco with low lignin content according to claim 9, wherein the coating amount of the dip-coating solution is 30-50% of the weight of the reconstituted tobacco paper base.
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