CN112120272B - Biological preparation method of regenerated tobacco leaves - Google Patents
Biological preparation method of regenerated tobacco leaves Download PDFInfo
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- CN112120272B CN112120272B CN202010816116.8A CN202010816116A CN112120272B CN 112120272 B CN112120272 B CN 112120272B CN 202010816116 A CN202010816116 A CN 202010816116A CN 112120272 B CN112120272 B CN 112120272B
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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
- A24B3/14—Forming reconstituted tobacco products, e.g. wrapper materials, sheets, imitation leaves, rods, cakes; Forms of such products
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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
- A24B15/20—Biochemical treatment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
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Abstract
A biological preparation method of regenerated tobacco leaves comprises the following steps: (1) mixing tobacco stems and tobacco powder, extracting with hot water, and mixing extractive solutions to obtain mixed extractive solution and residue; (2) mixing a tobacco stem extracting solution and the tobacco powder extracting solution, and then concentrating under reduced pressure to obtain a concentrated solution; (3) extracting the concentrated solution with ethanol to obtain ethanol extract; (4) feeding the filter residue liquid into a pulping machine for defibering; (5) adding a biological compound preparation into the filter residue solution after defibering for hydrolysis; (6) feeding the filter residue solution after enzymolysis into a pulping machine for continuous pulping to prepare tobacco pulp; (7) manufacturing the tobacco pulp obtained in the step (5) to form tobacco paper; (8) and (4) uniformly spraying the alcohol extract prepared in the step (3) into the tobacco paper prepared in the step (7), drying and shredding to obtain the regenerated tobacco leaves.
Description
Technical Field
The invention belongs to the technical field of tobacco leaf preparation, and particularly relates to a biological preparation method of regenerated tobacco leaves.
Background
The regenerated tobacco leaf is a regenerated product prepared by using main raw materials such as tobacco powder, tobacco stems and the like. The regenerated tobacco leaves are used as artificial tobacco leaves of cigarettes after being cut into shreds. In the prior art, the production methods of the regenerated tobacco leaves mainly comprise a rolling method, a thick pulp method and a paper-making method. The regenerated tobacco leaves manufactured by the paper making method are more and more widely applied to the tobacco industry due to the advantages of high filling value, good combustion performance, low tar release amount, reconfigurable chemical components and the like. The papermaking method mainly comprises the following steps: firstly, extracting raw materials such as tobacco stems, tobacco powder, broken tobacco leaves and the like by clear water at a certain temperature, and then separating soluble extracts from insoluble substances; grinding the extracted insoluble substances into fibrous tobacco pulp by papermaking pulping equipment (a disc grinder, a high-concentration pulping machine and the like); uniformly mixing the fibrous tobacco pulp, wood pulp fiber, filler and the like, and then papermaking by a paper machine to form a tobacco substrate; heating the soluble extract, vacuum concentrating, adding materials, coating on the surface of tobacco substrate by surface sizing or coating device, drying, and making into regenerated tobacco leaf.
Compared with imported products, the regenerated tobacco leaves produced by the domestic paper-making method have certain differences in physical properties and internal quality. In terms of physical properties, the paper-making base sheet generally requires higher bulk (the high bulk is beneficial to the absorption of the base sheet to the coating liquid in the coating process, which is important for ensuring the internal quality of the tobacco sheet), stronger absorption performance, flexibility and certain dry/wet strength (certain wet strength is used for ensuring that the paper-making base sheet can be subjected to the later coating process without paper breaking and certain dry strength is used for ensuring the proper processing performance and compatibility with tobacco). However, the bulk, absorbency, softness, and dry/wet strength of domestic paper-making process reconstituted tobacco leaves are not good enough. In the aspect of quality, the domestic paper-making method regenerated tobacco leaves also have the defects of heavy wood gas, high irritation, obvious paper gas, spicy taste and the like. The application effect and the addition amount of the domestic regenerated tobacco leaves in the cigarette industry of China are seriously influenced by the two defects of the domestic regenerated tobacco leaves.
Disclosure of Invention
In view of the above, the present invention provides a method for biologically preparing regenerated tobacco leaves, which overcomes the drawbacks of the prior art and improves the pulping property of tobacco pulp, paper making property and physical properties after paper making, according to the particularity of tobacco raw materials.
A biological preparation method of regenerated tobacco leaves comprises the following steps:
s1: providing tobacco stems and tobacco powder, mixing the tobacco stems and the tobacco powder, and then putting the mixture into hot water of 50-70 ℃ for stirring;
s2: extracting water mixed with tobacco stems and tobacco powder for 1-3 times to obtain a first extracting solution;
s3: extruding the mixed solution of the tobacco stems and the tobacco powder after the first extracting solution is extracted to obtain a second extracting solution, and combining the first extracting solution and the second extracting solution to obtain a mixed extracting solution and a filter residue solution;
s4: concentrating the mixed extracting solution under reduced pressure to obtain a concentrated solution;
s5: extracting the concentrated solution with ethanol to obtain an ethanol extract;
s6: feeding the filter residue liquid into a pulping machine for defibering until the beating degree is 16-30 DEG SR;
s7: adding a biological compound preparation into the filter residue solution after defibering for hydrolysis, wherein the action time is 0.1-2 h, the action temperature is 10-30 ℃, the biological compound preparation comprises an enzyme preparation compound, oxalic acid, glutaraldehyde and sodium trimetaphosphate, the concentration of each substance is 0.04-0.2% w/v, and the activity of each component in each gram of the enzyme preparation compound is respectively as follows: and (3) pectinase: 8000-12000U; cellulase: 5000-8000U; lipase: 20000-30000U; xylanase: 10000-20000U, wherein the addition amount of the enzyme preparation compound is 2 per mill of the total weight of the filter residue;
s8: feeding the residue solution after enzymolysis into a pulping machine, and continuously pulping until the pulping degree is 35-55 DEG SR to obtain tobacco pulp;
s9: making the tobacco pulp obtained in the step S8 into cigarette paper;
s10: and (5) uniformly spraying the alcohol extract prepared in the step (S5) onto the tobacco paper prepared in the step (S9), drying and shredding to obtain the regenerated tobacco leaves.
Further, the mixing weight ratio of the tobacco stems to the tobacco powder is 1: 3.
further, the concentration of the ethanol is 70% v/v-90% v/v.
Further, the concentration of ethanol is 90% v/v.
Further, the concentration of ethanol is 80% v/v.
Further, the concentration of each of the enzyme preparation complex, oxalic acid, glutaraldehyde, sodium trimetaphosphate was 0.2% w/v.
Further, the addition amount of the enzyme preparation compound is 1-3 per mill of the total weight of the filter residue.
Further, in step S5, the step of extracting the alcohol from the concentrated solution with 70-90% v/v ethanol comprises precipitating, centrifuging, collecting the supernatant, and recovering the ethanol to obtain an alcohol extract.
Compared with the prior art, the biological preparation method of the regenerated tobacco leaves organically combines physical effects, namely fiber defibering, an enzyme preparation, a surfactant and a nicotine solution, fully exerts respective characteristics, effectively improves the pulping characteristic of tobacco pulp through the synergistic effect of 4 substances, finally plays a role in improving the papermaking performance of the tobacco pulp and the physical quality of the regenerated tobacco leaves, and simultaneously improves the internal quality of the regenerated tobacco leaves.
Detailed Description
Specific examples of the present invention will be described in further detail below. It should be understood that the description herein of embodiments of the invention is not intended to limit the scope of the invention.
The biological preparation method of the regenerated tobacco leaves provided by the invention comprises the following steps:
s1: providing tobacco stems and tobacco powder, mixing the tobacco stems and the tobacco powder, and then putting the mixture into hot water of 50-70 ℃ for stirring;
s2: extracting water mixed with tobacco stems and tobacco powder for 1-3 times to obtain a first extracting solution;
s3: extruding the mixed solution of the tobacco stems and the tobacco powder after the first extracting solution is extracted to obtain a second extracting solution, and combining the first extracting solution and the second extracting solution to obtain a mixed extracting solution and a filter residue solution;
s4: concentrating the mixed extracting solution under reduced pressure to obtain a concentrated solution;
s5: performing ethanol extraction on the concentrated solution to obtain an ethanol extract;
s6: feeding the filter residue liquid into a pulping machine for defibering until the pulping degree is 16-30 DEG SR;
s7: adding a biological compound preparation into the filter residue solution after defibering for hydrolysis, wherein the action time is 0.1-2 h, the action temperature is 10-30 ℃, the biological compound preparation comprises an enzyme preparation compound, oxalic acid, glutaraldehyde and sodium trimetaphosphate, the concentration of each substance is 0.04-0.2% w/v, and the activity of each component in each gram of the enzyme preparation compound is respectively: and (3) pectinase: 8000-12000U; cellulase: 5000-8000U; and (2) lipase: 20000-30000U; xylanase: 10000-20000U;
s8: feeding the residue solution after enzymolysis into a pulping machine, and continuously pulping until the pulping degree is 35-55 DEG SR to obtain tobacco pulp;
s9: making the tobacco pulp obtained in the step S8 into cigarette paper;
s10: and (5) uniformly spraying the alcohol extract obtained in the step (S5) onto the tobacco paper obtained in the step (S9), drying and shredding to obtain the regenerated tobacco leaves.
In step S1, the stem and the tobacco powder are both offcuts formed during the tobacco production process. Specifically, the mixing weight ratio of the tobacco stems to the tobacco powder is 1: 3.
in step S3, the extruding step may be performed in one extruder. The purpose of squeezing is to obtain more second extract to achieve the purpose of solid-liquid separation.
In step S4, the purpose of the concentration under reduced pressure is to reduce the influence of the concentration temperature on the content of the aroma substances in the extract. Since during concentration, the temperature increases and this leads to the loss of the aroma. Therefore, the effect on the temperature at the time of concentration is reduced by concentration under reduced pressure, and particularly the effect on the content of the fragrant substance is reduced by reducing the temperature under reduced pressure.
In step S5, ethanol is added to remove macromolecular pectin, protein, starch, dextran, etc. in the concentrated solution with ethanol to reduce the introduction of pungent odor into the prepared tobacco leaf. Specifically, the step of extracting the alcohol from the concentrated solution by using 70-90% v/v ethanol comprises the steps of precipitating, centrifuging, taking supernate and recovering the ethanol to obtain an alcohol extract.
In step S6, the purpose of defibering is to improve the subsequent freeness. Specifically, defibering is to reduce the fiber of tobacco stems and tobacco powder in the concentrated solution by grinding of a refiner so as to achieve defibering.
In step S7, the addition amount of the enzyme preparation compound is 1-3 per mill of the total weight of the filter residue. The biological complexing agent comprises an enzyme preparation complex, oxalic acid, glutaraldehyde and sodium trimetaphosphate which are substances selected according to the specificity of tobacco raw materials and respectively have the following functions. For example, because the stem contains a large amount of pectin and starch, and the pectin and starch are tightly wrapped in the plant cell wall, the pectin cannot be completely hydrolyzed by heating, alcohol extraction, or enzymatic hydrolysis, because the pectin and starch are not released in the cell wall. The degradation efficiency is very low. Therefore, the oxalic acid is added to rapidly open the cell wall of the tobacco stem and release pectin and starch,the pectin and the starch are released and then are biodegraded, so that the effect of getting twice the result with half the effort can be achieved. The added glutaraldehyde and sodium trimetaphosphate can assist the oxalic acid to rapidly open the plant cell wall, so that the enzyme can be preparedAgent for treating diabetesThe compound can rapidly enter plant cells to degrade pectin, starch, protein and the like. And pectinase, cellulase, lipase and xylanase contained in the enzyme preparation compound. In the papermaking process of tobacco pulp, the existence of polygalacturonic acid with negative charges influences the demand of the cation retention aid in the papermaking process, so that the problems of poor retention of pulp and filler, high cation demand and the like are caused. The ability of polygalacturonic acids to bind to cationic polymers depends on their degree of polymerization, with hexamers and longer polysaccharide chains having a high degree of cationic demand. The pectinase can degrade polygalacturonic acid into a short chain structure, and the cation demand is reduced, so that the effectiveness of a cationic polymer can be increased, and the retention of a filling material and fine fibers can be increased. The cellulase can selectively treat the surface of the fiber, increases the degree of freedom of the fiber, makes the fiber fully absorb water and wet and broomed, makes the pulp more flexible during mechanical treatment of a pulp grinder, avoids or reduces the generation of a large amount of fine fibers or excessive fibrillation outside fiber cells due to fiber cutting, thereby reducing pulping energy consumption, improving the uniformity, strength and softness of paper and improving the operability of a paper machine. Meanwhile, the resin in the tobacco pulp has strong viscosity, and can be deposited on the surface of equipment and in the paper base in various modes in the papermaking process to form resin barriers, so that the paper base has holes or spots, and production disorder or even halt is caused in severe cases. Therefore, the addition of lipase can effectively degrade triglyceride which is an important component causing pitch disturbance, thereby inhibiting the deposition of pitch and achieving the purpose of controlling pitch disturbance. In addition, the fatty acid generated after the action of the lipase is a surface active substance and can promote the combination between the enzyme and the substrate molecule. In addition, in pulp made by mechanical methods, the fiber surface is mostly covered by lignin, pectin and hemicellulose from the ML layer, which seriously affects the bonding between fibers. And xylanase, pectinase and glucanThe glucose oxidase can act on the surface substance of the layer, increase the interlacing sites between fibers and improve the dry/wet strength of the paper base. In addition, the more hemicellulose content, the lower the paper bulk, and thus xylanases and pectinases also help to increase paper bulk. Moreover, glucose oxidase can oxidize glucose to generate hydrogen peroxide, and the hydrogen peroxide plays a role in oxidizing and bleaching tobacco pulp on one hand, so that the color of the regenerated tobacco leaves is reduced, and the compatibility of the regenerated tobacco leaves and natural tobacco leaves is improved. On the other hand, lignin can be oxidized, so that the structure of the lignin is changed, and the influence of the lignin on the quality of papermaking and regenerated tobacco leaves is reduced.
In the process of extracting the tobacco raw material, most of protein, pectin, hemicellulose, lipid and the like are remained in filter residues due to the limitation of a cell wall structure, so that the papermaking performance of tobacco pulp and the physical index and the internal quality of regenerated tobacco leaves are influenced. The enzyme preparation can degrade the part of the substances, but the enzyme preparation is limited by natural degradation-resistant barriers of plants, so that the ideal effect is difficult to achieve by the pure enzyme preparation. According to the preparation method of the tobacco pulp, the physical effect (defibering), the enzyme preparation, the surfactant and the nicotine solution are organically combined, the respective characteristics are fully exerted, the pulping characteristic of the tobacco pulp is effectively improved through the synergistic effect of 4 matters, the papermaking performance of the tobacco pulp and the physical quality of the regenerated tobacco leaves are finally improved, and meanwhile, the internal quality of the regenerated tobacco leaves is improved.
The invention will be further illustrated with reference to the following specific examples.
Example 1
A biological preparation method of regenerated tobacco leaves comprises the following steps:
s11: providing tobacco stems and tobacco powder, mixing the tobacco stems and the tobacco powder according to a ratio of 1:3, and then putting the mixture into hot water with the temperature of 50 ℃ for stirring;
s12: extracting water mixed with tobacco stems and tobacco powder for 3 times to obtain a first extracting solution;
s13: extruding the mixed solution of the tobacco stems and the tobacco powder after the first extracting solution is extracted to obtain a second extracting solution, and combining the first extracting solution and the second extracting solution to obtain a mixed extracting solution and a residue filtering solution;
s14: concentrating the mixed extracting solution under reduced pressure to obtain a concentrated solution;
s15: performing 90% v/v ethanol extraction on the concentrated solution to obtain an ethanol extract;
s16: feeding the filter residue liquid into a pulping machine for defibering until the beating degree is 16 DEG SR;
s17: adding a biological compound preparation into the filter residue solution after defibering for hydrolysis, wherein the action time is 2h, the action temperature is 30 ℃, the biological compound preparation comprises an enzyme preparation compound, oxalic acid, glutaraldehyde and sodium trimetaphosphate, the concentration of each substance is 0.2% w/v, and the activity of each component in each gram of the enzyme preparation compound is as follows: and (3) pectinase: 10000U; cellulase: 6500U; lipase: 25000U; xylanase: 15000U; the addition amount of the compound enzyme preparation is 2 per mill of the total dry weight of filter residue;
s18: sending the filter residue solution after enzymolysis into a pulping machine for continuous pulping until the pulping degree is 55 DEG SR, and obtaining tobacco pulp;
s19: manufacturing the tobacco pulp obtained in the step S18 into tobacco paper;
s20: and (5) uniformly spraying the alcohol extract obtained in the step (S15) onto the tobacco paper obtained in the step (S19), drying and shredding to obtain the regenerated tobacco leaves.
Example 2
A biological preparation method of regenerated tobacco leaves comprises the following steps:
s21: providing tobacco stems and tobacco powder, mixing the tobacco stems and the tobacco powder according to a ratio of 1:3, and then putting the mixture into hot water of 70 ℃ for stirring;
s22: extracting water mixed with tobacco stems and tobacco powder for 1 time to obtain a first extracting solution;
s23: extruding the mixed solution of the tobacco stems and the tobacco powder after the first extracting solution is extracted to obtain a second extracting solution, and combining the first extracting solution and the second extracting solution to obtain a mixed extracting solution and a residue filtering solution;
s24: concentrating the mixed extracting solution under reduced pressure to obtain a concentrated solution;
s25: extracting the concentrated solution with 80% v/v ethanol to obtain ethanol extract;
s26: feeding the filter residue liquid into a pulping machine for defibering until the beating degree is 25 DEG SR;
s27: adding a biological compound preparation into the filter residue solution after defibering for hydrolysis, wherein the action time is 1h, the action temperature is 20 ℃, the biological compound preparation comprises an enzyme preparation compound, oxalic acid, glutaraldehyde and sodium trimetaphosphate, the concentration of each substance is 0.04% w/v, and the activity of each component in each gram of the compound enzyme preparation is as follows: and (3) pectinase: 8000U; cellulase: 5000U; lipase: 30000U; xylanase enzyme: 10000U; the addition amount of the compound enzyme preparation is 1 per mill of the total dry weight of filter residue;
s28: feeding the filter residue solution after enzymolysis into a pulping machine for continuous pulping until the pulping degree is 50 DEG SR, and obtaining tobacco pulp;
s29: making the tobacco pulp obtained in the step S28 into cigarette paper;
s30: and (5) uniformly spraying the alcohol extract prepared in the step (S25) onto the tobacco paper prepared in the step (S29), drying and shredding to obtain the regenerated tobacco leaves.
Example 3
A biological preparation method of regenerated tobacco leaves comprises the following steps:
s31: providing tobacco stems and tobacco powder, mixing the tobacco stems and the tobacco powder according to a ratio of 1:3, and then putting the mixture into hot water with the temperature of 60 ℃ for stirring;
s32: extracting water mixed with tobacco stems and tobacco powder for 2 times to obtain a first extracting solution;
s33: extruding the mixed solution of the tobacco stems and the tobacco powder after the first extracting solution is extracted to obtain a second extracting solution, and combining the first extracting solution and the second extracting solution to obtain a mixed extracting solution and a filter residue solution;
s34: concentrating the mixed extracting solution under reduced pressure to obtain a concentrated solution;
s35: extracting the concentrated solution with 70% v/v ethanol to obtain ethanol extract;
s36: feeding the filter residue liquid into a pulping machine for defibering until the beating degree is 25 DEG SR;
s37: adding a biological compound preparation into the filter residue solution after defibering for hydrolysis, wherein the action time is 1h, the action temperature is 20 ℃, the biological compound preparation comprises an enzyme preparation compound, oxalic acid, glutaraldehyde and sodium trimetaphosphate, the concentration of each substance is 0.1% w/v, and the activity of each component in each gram of the compound enzyme preparation is as follows: and (3) pectinase: 12000U; cellulase: 8000U; and (2) lipase: 20000U; xylanase: 10000U; the addition amount of the compound enzyme preparation is 1 per mill of the total dry weight of filter residue;
s38: feeding the filter residue solution after enzymolysis into a pulping machine for continuous pulping until the pulping degree is 40 DEG SR, and preparing tobacco pulp;
s39: making the tobacco pulp obtained in the step S38 into cigarette paper;
s40: and (5) uniformly spraying the alcohol extract obtained in the step (S35) onto the tobacco paper obtained in the step (S39), drying and shredding to obtain the regenerated tobacco leaves.
Example 4
A biological preparation method of regenerated tobacco leaves comprises the following steps:
s41: providing tobacco stems and tobacco powder, mixing the tobacco stems and the tobacco powder according to a ratio of 1:3, and then putting the mixture into hot water with the temperature of 60 ℃ for stirring;
s42: extracting water mixed with tobacco stems and tobacco powder for 3 times to obtain a first extracting solution;
s43: extruding the mixed solution of the tobacco stems and the tobacco powder after the first extracting solution is extracted to obtain a second extracting solution, and combining the first extracting solution and the second extracting solution to obtain a mixed extracting solution and a filter residue solution;
s44: concentrating the mixed extracting solution under reduced pressure to obtain a concentrated solution;
s45: extracting the concentrated solution with 90% v/v ethanol to obtain ethanol extract;
s46: sending the filter residue liquid into a pulping machine for defibering until the pulping degree is 25 DEG SR;
s47: adding a biological compound preparation into the filter residue solution after defibering for hydrolysis, wherein the action time is 1h, the action temperature is 20 ℃, the biological compound preparation comprises an enzyme preparation compound, oxalic acid, glutaraldehyde and sodium trimetaphosphate, the concentration of each substance is 0.2% w/v, and the activity of each component in each gram of the compound enzyme preparation is as follows: and (3) pectinase: 8000U; cellulase: 8000U; lipase: 20000U; xylanase: 20000U; the addition amount of the compound enzyme preparation is 2 per mill of the total dry weight of filter residue;
s48: feeding the filter residue solution after enzymolysis into a pulping machine for continuous pulping until the pulping degree is 40 DEG SR, and preparing tobacco pulp;
s49: manufacturing the tobacco pulp obtained in the step S48 into tobacco paper;
s50: and (5) uniformly spraying the alcohol extract obtained in the step (S45) onto the tobacco paper obtained in the step (S49), drying and shredding to obtain the regenerated tobacco leaves.
Comparative example 1
A biological preparation method of regenerated tobacco leaves comprises the following steps:
(1) mixing tobacco stems and tobacco powder according to a ratio of 1:3, extracting with hot water at 60 ℃ for 3 times, then extruding, and combining the extracting solutions to obtain a mixed extracting solution and filter residue;
(2) combining the tobacco stem extracting solution and the tobacco powder extracting solution, and then concentrating under reduced pressure to obtain a concentrated solution;
(3) extracting the concentrated solution with 90% v/v ethanol to obtain ethanol extract;
(4) feeding the filter residue liquid into a pulping machine for defibering until the pulping degree is 35 DEG SR, and obtaining tobacco pulp; (5) making the tobacco pulp obtained in the step (4) into paper to form cigarette paper;
(6) and (4) uniformly spraying the alcohol extract prepared in the step (3) into the cigarette paper prepared in the step (7), drying and shredding to obtain the regenerated tobacco leaves.
Comparative example 2
A biological preparation method of regenerated tobacco leaves comprises the following steps:
(1) mixing tobacco stems and tobacco powder according to a ratio of 1:3, extracting with hot water at 50 ℃ for 3 times, then extruding, and combining the extracting solutions to obtain a mixed extracting solution and filter residue;
(2) combining the tobacco stem extracting solution and the tobacco powder extracting solution, and then concentrating under reduced pressure to obtain a concentrated solution;
(3) feeding the filter residue liquid into a pulping machine for defibering until the pulping degree is 16 DEG SR, and obtaining tobacco pulp;
(4) making the tobacco pulp obtained in the step (3) into paper to form cigarette paper;
(5) and (4) drying and shredding the tobacco paper prepared in the step (4) to obtain the regenerated tobacco leaves.
Comparative example 3
A biological preparation method of regenerated tobacco leaves comprises the following steps:
(1) mixing tobacco stems and tobacco powder according to a ratio of 1:3, extracting with hot water at 60 ℃ for 2 times, then extruding, and combining the extracting solutions to obtain a mixed extracting solution and filter residue;
(2) combining the tobacco stem extracting solution and the tobacco powder extracting solution, and then concentrating under reduced pressure to obtain a concentrated solution;
(3) extracting the concentrated solution with 70% v/v ethanol to obtain ethanol extract;
(4) sending the filter residue liquid into a pulping machine for defibering until the pulping degree is 30 DEG SR;
(5) adding oxalic acid, glutaraldehyde and sodium trimetaphosphate into the filter residue solution after defibering, wherein the concentration of each compound is 0.1% w/v; hydrolyzing for 0.5h at 10 deg.C with the addition amount of 1 ‰ of the total dry weight of the residue;
(6) feeding the filter residue solution after enzymolysis into a pulping machine for continuous pulping until the pulping degree is 40 DEG SR, and obtaining tobacco pulp;
(7) making the tobacco pulp obtained in the step (5) into paper to form cigarette paper;
(8) and (4) uniformly spraying the alcohol extract prepared in the step (3) into the tobacco paper prepared in the step (7), drying and shredding to obtain the regenerated tobacco leaves.
Comparative example 4
A biological preparation method of regenerated tobacco leaves comprises the following steps:
(1) mixing tobacco stems and tobacco powder according to a ratio of 1:3, extracting with hot water at 70 ℃ for 1 time, and then extruding to obtain a mixed extracting solution and filter residues;
(2) carrying out reduced pressure concentration on the tobacco stem extracting solution and the tobacco powder extracting solution to obtain a concentrated solution;
(3) extracting the concentrated solution with 80% v/v ethanol to obtain ethanol extract;
(4) feeding the filter residue liquid into a pulping machine for defibering until the beating degree is 25 DEG SR;
(5) adding a biological compound preparation into the filter residue solution after defibering for hydrolysis, wherein the action time is 1h, and the action temperature is 20 ℃, the biological compound preparation comprises an enzyme preparation composition, glutaraldehyde and sodium trimetaphosphate, the concentration of each compound is 0.04% w/v, the enzyme preparation composition comprises pectinase, cellulase, lipase and xylanase, and the activities of each component in each gram of the compound enzyme preparation are respectively as follows: and (3) pectinase: 8000U; cellulase: 5000U; lipase: 30000U; xylanase enzyme: 10000U; the addition amount of the compound enzyme preparation is 1 per mill of the total dry weight of filter residue;
(6) feeding the filter residue solution after enzymolysis into a pulping machine for continuous pulping until the pulping degree is 50 DEG SR, and obtaining tobacco pulp;
(7) making the tobacco pulp obtained in the step (5) into paper to form cigarette paper;
(8) and (4) uniformly spraying the alcohol extract prepared in the step (3) into the cigarette paper prepared in the step (7), drying and shredding to obtain the regenerated tobacco leaves.
Application effect of preparation method of tobacco pulp of different regenerated tobacco leaves
1. Test materials and apparatus
Test materials tobacco pulp, bleached kraft pulp (softwood to hardwood ratio 1:1, degree of beating 40 ° SR), and Precipitated Calcium Carbonate (PCC) were prepared as in example 1 and comparative examples 1, 2, 3, and 4.
Test equipment: fiber analyzers, tensile strength testers, wet tensile strength testers, stiffness testers, dynamic drainage meters (DDJ), 95854 paper industry formers, and the like.
2. Test method
2.1 fiber morphology analysis
Comparative analysis of the fiber morphology of the tobacco pulp obtained in example 1 and comparative examples 1, 2, 3 and 4 was carried out.
2.2 preparation of tobacco pulp
Tobacco pulp was mixed with bleached kraft pulp and PCC in a ratio of 65%: 20%: mixing 15% to obtain tobacco pulp.
2.3 slurry drainage Performance analysis
The tobacco pulp prepared from the tobacco pulp is subjected to comparative analysis of drainability, single pass retention and filler retention by using a dynamic water filter.
Determination of the single pass retention: preparing tobacco pulp into 0.5% concentration with tap water, weighing 500mL tobacco pulp equivalent to 2.5g oven dry pulp, stirring, transferring into dynamic drainage instrument (DDJ), stirring at a certain speed for 70s, opening drain valve, filtering 100mL filtrate with constant weight filter paper, oven drying, and weighing.
Calculation of the single pass retention R:
R＝(S 0 -5S)/S 0 ×100％；
S 0 is the solid content in 500ml of slurry
S is the solid content in 100ml of slurry
Determination of drainage Performance: preparing tobacco pulp into 0.3% concentration with tap water, measuring 1000mL of the prepared pulp, pouring into a dynamic water filtration instrument, starting a stirrer, stirring at a certain speed for 20s, opening a valve, and measuring the mass (g) of filtrate within 20s of water filtration time.
2.4 measurement of physical Properties of tobacco sheet
And (2) making each tobacco pulp into a tobacco substrate by using a paper former, wherein the quantitative amount of the substrate is 65g/m2, after the preparation of the tobacco substrate is finished, the tobacco substrate needs to be treated under the conditions of constant temperature and constant humidity at the temperature of (23 +/-1) DEG C and the relative humidity of (50 +/-2%) for 24 hours, and then the determination of physical properties is carried out.
3. Results of the experiment
The forms of the tobacco pulp fibers obtained by the respective production methods are shown in the following table, and it is understood that defibering is most important for the present invention, and the destructive action of physical action on tissues is incomparable with the reagent method. In addition, a single enzyme preparation, a surfactant and nicotine cannot achieve ideal effects, 4 synergistic effects can achieve 1+1>2 effects, the average length is improved by more than 27%, the width is improved by more than 29%, and fine components are reduced by more than 42%.
TABLE 1 fiber morphology test results
| Tobacco pulp source | Average length mm | Width of mum | Fine component% |
| Example 1 | 0.658 | 28.5 | 16.9 |
| Comparative example 1 | 0.501 | 24.9 | 24.3 |
| Comparative example 2 | 0.533 | 24.1 | 23.2 |
| Comparative example 3 | 0.514 | 23.8 | 25.4 |
| Comparative example 4 | 0.12 | 23.3 | 26.5 |
The drainability and retention rate of the pulp represent the difficulty of pulp manufacturing, the pulp has good drainability and retention rate, the paper machine runs more stably, and the operation space is large. The results of examining the drainage performance of tobacco pulp prepared from different tobacco pulps are shown in table 2, and the single pass retention of the invention is improved by 36.5%, the filler retention is improved by 125%, and the drainage speed is increased by 118%. The comparative analysis of the data shows that the action of the enzyme preparation is more pronounced than the others.
Table 2 results of slurry drainability experiment
| Tobacco pulp source | Single pass retention% | Retention of filler% | Amount of filtered water g |
| Example 1 | 89 | 65 | 481 |
| Comparative example 1 | 71 | 44 | 389 |
| Comparative example 2 | 66 | 41 | 416 |
| Comparative example 3 | 72 | 39 | 321 |
| Comparative example 4 | 70 | 35 | 298 |
The physical property comparison analysis is carried out on the tobacco substrate prepared by different tobacco pulp, the invention can obviously improve the physical property of the tobacco substrate, wherein the bulk is improved by more than 14 percent, the dry tensile index is improved by more than 41 percent, the wet tensile index is improved by more than 58 percent, the flexibility (the flexibility is just opposite to the stiffness) is improved by more than 35 percent, the burst index is improved by more than 79 percent, and the tearing index is improved by more than 11 percent. The tensile strength is improved, so that the addition amount of the additional fibers can be properly reduced, and the negative effect of the additional fibers on the mouthfeel of the regenerated tobacco leaves is reduced. The filling value of the regenerated tobacco leaves can be increased by increasing the bulk, and the content of harmful substances such as nicotine, tar and the like in the cigarettes can be reduced.
Table 3 physical property test results of tobacco substrate sheets prepared
Example 1 was applied to a factory large scale experiment, wherein the pulp mix was tobacco pulp: bleached kraft wood pulp-8: 1 wood pulp from softwood pulp and hardwood pulp at a ratio of 1:1, and the beating degree of the beaten mixed wood pulp is controlled to be 40 DEG SR. The conventional tobacco pulp making method of a factory is used as a reference, the final result is shown in table 4, and the result shows that the tobacco pulp prepared by the method can effectively improve the running stability of a paper machine and reduce the paper breaking times; the paper flatness is improved, and grease deposition and colloid aggregation are reduced; the physical properties of the finished paper are improved; the energy consumption of grinding is reduced; the retention rate of pulp and filler is improved, and the turbidity of white water is reduced. Through large-scale production experiments, the method for preparing the tobacco pulp can obviously reduce the cleaning times of a paper machine.
Table 4 summary table of large-scale production experiment data
According to the biological preparation method of the regenerated tobacco leaves, the pulping characteristics of the tobacco pulp are effectively improved through the organic combination of physical action, the enzyme preparation and the chemical reagent, the papermaking performance of the tobacco pulp is improved, the physical indexes of the regenerated tobacco leaves are improved, and meanwhile, the internal quality of the regenerated tobacco leaves is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, and any modifications, equivalents or improvements that are within the spirit of the present invention are intended to be covered by the following claims.
Claims (6)
1. A biological preparation method of regenerated tobacco leaves comprises the following steps:
s1: providing tobacco stems and tobacco powder, mixing the tobacco stems and the tobacco powder, and then putting the mixture into hot water of 50-70 ℃ for stirring;
s2: extracting water mixed with tobacco stems and tobacco powder for 1-3 times to obtain a first extracting solution;
s3: extruding the mixed solution of the tobacco stems and the tobacco powder after the first extracting solution is extracted to obtain a second extracting solution, and combining the first extracting solution and the second extracting solution to obtain a mixed extracting solution and a residue filtering solution;
s4: concentrating the mixed extracting solution under reduced pressure to obtain a concentrated solution;
s5: extracting the concentrated solution with ethanol, wherein the step of extracting the concentrated solution with 70-90% v/v ethanol comprises precipitating, centrifuging, collecting supernatant, and recovering ethanol to obtain an ethanol extract;
s6: feeding the filter residue liquid into a pulping machine for defibering until the beating degree is 16-30 DEG SR;
s7: adding a biological compound preparation into the filter residue solution after defibering for hydrolysis, wherein the action time is 0.1-2 h, the action temperature is 10-30 ℃, the biological compound preparation comprises an enzyme preparation compound, oxalic acid, glutaraldehyde and sodium trimetaphosphate, the concentration of each substance is 0.04-0.2% w/v, and the activity of each component in each gram of the enzyme preparation compound is respectively as follows: and (3) pectinase: 8000-12000U; cellulase: 5000-8000U; lipase: 20000-30000U; xylanase: 10000-20000U, wherein the addition amount of the enzyme preparation compound is 1-3 per mill of the total weight of the filter residue;
s8: feeding the residue solution after enzymolysis into a pulping machine for continuous pulping until the pulping degree is 35-55 DEG SR, and obtaining tobacco pulp;
s9: manufacturing the tobacco pulp obtained in the step S8 into tobacco paper;
s10: and (5) uniformly spraying the alcohol extract prepared in the step (S5) onto the tobacco paper prepared in the step (S9), drying and shredding to obtain the regenerated tobacco leaves.
2. The biological preparation method of the regenerated tobacco leaves as claimed in claim 1, characterized in that the mixing weight ratio of the tobacco stems to the tobacco powder is 1: 3.
3. the method of claim 1, wherein the concentration of ethanol is 90% v/v.
4. The method of claim 1, wherein the concentration of ethanol is 80% v/v.
5. The method of claim 1, wherein the concentration of each of the enzyme preparation complex, oxalic acid, glutaraldehyde, and sodium trimetaphosphate is 0.2% w/v.
6. The method of bio-producing reconstituted tobacco according to claim 1, wherein: the addition amount of the enzyme preparation compound is 2 per mill of the total weight of the filter residue.
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