CN105146721A - Method for selectively reducing content of Pb in paper-making method reconstituted tobacco extract liquor - Google Patents
Method for selectively reducing content of Pb in paper-making method reconstituted tobacco extract liquor Download PDFInfo
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- CN105146721A CN105146721A CN201510547778.9A CN201510547778A CN105146721A CN 105146721 A CN105146721 A CN 105146721A CN 201510547778 A CN201510547778 A CN 201510547778A CN 105146721 A CN105146721 A CN 105146721A
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Abstract
The invention discloses a method for selectively reducing the content of Pb in paper-making method reconstituted tobacco extract liquor. The method is characterized by comprising the steps that the tobacco extract liquor prepared according to a paper-making method reconstituted tobacco production process is introduced into a desalting chamber of an electrodialysis device, electrodialysis treatment is carried out to reduce the content of Pb, and the Pb removing degree is controlled through the change of conductivity in the desalting chamber or the actual content of Pb in the process of reducing the content of Pb; meanwhile, the nicotine content and the total quantity of organic acid in the desalting chamber are detected to inspect the selectivity of removing lead ions. According to the method, the content of Pb can be effectively reduced, meanwhile, the loss of nicotine and main organic acid of the tobacco can be avoided, and the smoking quality of the reconstituted tobacco is guaranteed to the maximum degree.
Description
Technical field
The present invention relates to a kind of papermaking-method reconstituted tobaccos P
bthe selective reduction method of content, belongs to papermaking-method reconstituted tobaccos production technical field.
Background technology
In recent years, along with the aggravation of smoking and healthy contradiction, the security of sucking of cigarette has become the important research direction of tobacco science, and the heavy metal elements such as the arsenic wherein in flue gas, Qian, Cadmium, chromium are listed in Huffman harmful ingredients in flue gas list.Therefore the P in tobacco and flue gas is reduced
bcontent contributes to the security promoting smoking property of cigarette.
Papermaking-method reconstituted tobaccos is a kind of filamentary tobacco of restructuring, it has that burn rate is fast, releasing content of coke tar is low, Filling power is high and the feature such as degrading resistance property is good, the Modulatory character of its chemical constituent and physical parameter is its of paramount importance feature, but the current method still lacking effective heavy metal element reduced in reconstituted tobacco self and flue gas thereof.Chinese patent CN102406230A discloses and utilizes pulse filter, electrolytic treatments and cationic ion-exchange resin to combine the method removing heavy metal ions from tobacco extract, it is 88%-97% that wherein plumbous content reduces amplitude, but whether do not investigate nicotine and organic acid reduction effect, be that selective reduction need to investigate.The effective removal methods of heavy metal also includes flocculence, oxidation-reduction method, electrolysis, solvent extraction and separation method, absorption method, electroosmose process and emerging biologic treating technique etc., wherein flocculence, oxidation-reduction method, electrolysis, solvent extraction and separation method need to add other chemical substance in solution to be purified, are not suitable for the purification technique as heavy metal ions from tobacco extract; The treatment effeciency of absorption method and ion-exchange is limited; Biologic treating technique operation more complicated, intractability is larger; And the advantage such as electroosmose process has that energy ezpenditure is low, operating maintenance convenient, environmental pollution is little, compare the removal being suitable for heavy metal ions from tobacco extract.Chinese patent CN101108306A discloses and utilizes electrodialysis methods to remove the heavy metals such as plant extraction liquid Zhong Cadmium, lead, reduces effect more remarkable.In addition electrodialytic technique is as the efficient desalination means of one, it is also higher to the removal efficiency of the ionic compound in tabacco water extract, as CN103082394A, CN103330277A and US4302308A, US4253929 utilize electrodialysis methods to remove chlorion, nitrate ion in tobacco extract or reconstituted tobacco extract, but these patents all do not investigate the removal effect to Pb.Be directed to the reduction of heavy metal ions from tobacco extract, Chinese patent CN102406230A discloses and uses the method for electrodialysis coupled ion exchange column chromatography to remove As, Pb and Cd in tobacco extraction liquid, removal efficiency reaches as high as 90%, but this patent does not investigate the impact processed nicotine and cigarette sensory quality.Containing nonionic active principle (as: fructose, glucose, pectin etc.) and ionic active principle (as nicotine) in tobacco extraction liquid, wherein nicotine is the of paramount importance functional component of tobacco.Although common electrodialytic technique can realize chlorion, nitrate ion plasma compound relative to the selective removal of nonionic compound, but usually also cause a large amount of losses of tobacco ionic active principle (nicotine and organic acid), this will cause smoking property of cigarette quality to decline.While Xiang Haiying etc. use IONSEPTM amberplex to remove chlorion, find that nicotine also reduces by more than 50% (in stem extracting solution, the electroosmose process of chlorion removes, tobacco science and technology, 2015,1:72-75).Therefore, while raising tobacco extraction liquid intermediate ion removal efficiency, the active ingredient (nicotine and organic acid) how effectively retaining tobacco is electrodialysis process tobacco extraction liquid key issue urgently to be resolved hurrily, is also the key problem in technology of electrodialytic technique application in papermaking-method reconstituted tobaccos is produced.
Summary of the invention
The present invention be directed to nicotine existing for above-mentioned existing electrodialytic technique and a large amount of losing issue of organic acid and the P that a kind of production technology is simple, controllability is strong developed
bselective regulation method, can be widely used in, in papermaking-method reconstituted tobaccos extract, making P
bthe selective reduction of content, and effectively avoid nicotine and organic acid to run off, at reduction P
bwhile content, significantly improve papermaking-method reconstituted tobaccos sucking quality.
The present invention efficiently reduces P in tobacco extraction liquid by the selective use through film of univalent anion
bcontent, and effectively prevent nicotine and organic acid loss, achieve P
bit is selective that content reduces.
Technical solution problem of the present invention, adopts following technical scheme:
P in papermaking-method reconstituted tobaccos extract of the present invention
bthe selective reduction method of content, is characterized in:
A, the diluting compartment of electrodialysis plant will be introduced according to the tobacco extraction liquid prepared by papermaking-method reconstituted tobaccos production technology, and in enriched chamber, add water or electrolyte; The solid content of described tobacco extraction liquid is 7-10%.
The anion-exchange membrane of described electrodialysis plant is that univalent anion is selective through film, the preferred homogeneous phase cation exchange film of cation-exchange membrane.
The step preparing tobacco extraction liquid according to papermaking-method reconstituted tobaccos production technology is: add in agitator tank by papermaking-method reconstituted tobaccos raw material (offal, tobacco leaf and/or offal), add the water of 4-10 times of weight, stir extraction 1 hour, Double screw pulp extruder is used to carry out Separation of Solid and Liquid, the tabacco water solution obtained to shake sieve coarse filtration through 80-120 object, centrifugation under 2500-3500rmb speed conditions again, clear liquid is the tobacco extraction liquid needed for electrodialysis process.
B, under constant current conditions electrodialysis process is carried out to tobacco extraction liquid and remove P
bion, namely carries out de-plumbous process; The flow of electrodialysis process is 4-8L/min; Constant current density is 15-30mA/cm
2;
C, the change passing through diluting compartment internal conductance rate in de-plumbous processing procedure or P
bactual content control de-plumbous degree; Detect nicotine content and organic acid total amount (comprising citric acid, oxalic acid and malic acid) in diluting compartment simultaneously and take off the selective of plumbous process to investigate;
D, by the tobacco extraction liquid after de-lead according to papermaking-method reconstituted tobaccos production technology proceed process, for the processing of reconstituted tobacco.
Under usual condition, tobacco extract is in acid, and its pH scope is about 4.5-6.5, and nicotine wherein mainly exists with the form of monovalent salt.In theory, nicotine is by monovalence selective ion exchange membrane, but experiment finds: in electrodialytic process, nicotine is selective through film not by univalent anion, this may be mainly that univalent anion is selective has physical preferences through film to it because the ionic hydration radius of nicotine anion is large.Thus the present invention can pass through the selective use through film of univalent anion, reduce P in tobacco extraction liquid efficient
bwhile content, effectively prevent nicotine and organic acid loss, achieve P
bthe selective reduction of content.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1, the present invention effectively can not only reduce P
bcontent, can avoid nicotine and the main organic acid of tobacco to run off simultaneously, promote the quality of papermaking-method reconstituted tobaccos extract, farthest ensure that the sucking quality of reconstituted tobacco.
2, production technology of the present invention is simple, controllability strong, steady quality, can be widely used in P in papermaking-method reconstituted tobaccos extract
bthe selective reduction of content.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is described in further detail
Embodiment 1:
Being that tobacco extraction liquid prepared by raw material with tobacco leaf, is that the tobacco extraction liquid of 8% loads and is provided with 10 pairs of amberplexes (wherein cavity block is Selemion by 450mL solid content
tMunivalent anion is selective through film, and anode membrane is Selemion
tMmonovalent cation is selective through film, and effective area is 1 square metre) electrodialysis plant diluting compartment in, and in enriched chamber, add the running water of 500mL; At 15mA/cm
2constant current density condition under, carry out electrodialysis process 40min under the flow of 5L/min, after tested, after process, in diluting compartment, the electrical conductivity of tobacco extraction is reduced to 8.89mS/cm by initial 13.63mS/cm.
Being provided with 10 pairs of conventional ion exchange membranes, (anion-exchange membrane is common homogeneous-phase anion exchange film CJA-2, cation-exchange membrane is common homogeneous phase cation exchange film CJC-2, Hefei Ke Jia macromolecular material Science and Technology Ltd. manufactures) electrodialysis plant in carry out the electrodialysis process contrast test of identical tobacco extraction liquid, test parameters is except amberplex difference used, and other parameter is all identical.
After two kinds of membrane stack process, in diluting compartment, the chemical analysis results of tobacco extraction liquid is in table 1, and result shows: compared with conventional ion exchange membrane, and monovalent ion is selective is realizing P through film
bunder the prerequisite that content significantly reduces, significantly can improve P
bselective relative to nicotine of content, avoids a large amount of losses of nicotine, and organic acid (mainly comprising citric acid, oxalic acid and malic acid) have also been obtained good reservation simultaneously.
The Analyses Methods for Sensory Evaluation Results of the papermaking-method reconstituted tobaccos prepared by the tobacco extraction liquid after the process of use two kinds of electrodialysis membrane stacks shows: compared with using the non-selective removal contrast of conventional ion exchange membrane, through monovalent ion selective through the papermaking-method reconstituted tobaccos after film selective removal suck strength and burn rate all significantly promotes, and organoleptic quality entirety improves.
Table 1
Embodiment 2:
Being that tobacco extraction liquid prepared by raw material with offal, is that the tobacco extraction liquid of 8% loads and is provided with 10 pairs of amberplexes (wherein cavity block is Selemion by 500mL solid content
tMunivalent anion is selective through film; Cation-exchange membrane is homogeneous phase cation exchange film CJC-2, Hefei Ke Jia macromolecular material Science and Technology Ltd. manufacture) electric dialyzator diluting compartment in; The sodium sulphate of the 1.0mol/L of 500mL is added as initial electrolyte in enriched chamber; At 25mA/cm
2constant current density condition under carry out electrodialysis process 35min.After tested, after process, in diluting compartment, the electrical conductivity of tobacco extraction liquid is reduced to 5.5mS/cm by initial 16.38mS/cm.
Being provided with 10 pairs of homogeneous ion-exchange membranes, (anion-exchange membrane is CJA-2 homogeneous-phase anion exchange film, cation-exchange membrane is CJC-2 homogeneous phase cation exchange film, Hefei Ke Jia macromolecular material Science and Technology Ltd. manufactures) electrodialysis plant in carry out the electrodialysis process contrast test of identical tobacco extraction liquid, test parameters is except anion-exchange membrane difference, and other parameter is all identical.
After two kinds of membrane stack process, in diluting compartment, the chemical analysis results of tobacco extraction liquid is in table 2, and result shows: compared with common homogeneous-phase anion exchange film, and univalent anion is selective is realizing P through film
bunder the prerequisite that content significantly reduces, significantly can improve P
bselective relative to nicotine of content, avoids a large amount of losses of nicotine, and organic acid have also been obtained good reservation simultaneously.
The evaluation result of the papermaking-method reconstituted tobaccos prepared by the tobacco extraction liquid after the process of use two kinds of electrodialysis membrane stacks shows: with the P using common homogeneous-phase anion exchange film
bthe non-selective removal contrast of ion is compared, and significantly promote, and the organoleptic indicator such as pleasant impression and excitant is improved through the selective strength of sucking through the papermaking-method reconstituted tobaccos after film selective removal of univalent anion.
Comparative example 1 and embodiment 2 also known, when the anion-exchange membrane of electrodialysis plant select univalent anion selective through film, cation-exchange membrane selects homogeneous phase cation exchange film, and than selecting monovalent cation, the selective better effects if through film is a little, selective compared with monovalent cation through film, the use of homogeneous phase cation exchange film can improve P
bremoval efficiency and selective.
Table 2
Claims (4)
1. P in a papermaking-method reconstituted tobaccos extract
bthe selective reduction method of content, is characterized in that:
A, the diluting compartment of electrodialysis plant will be introduced according to the tobacco extraction liquid prepared by papermaking-method reconstituted tobaccos production technology, and in enriched chamber, add water or electrolyte; The anion-exchange membrane of described electrodialysis plant is that univalent anion is selective through film;
B, under constant current density condition, electrodialysis process is carried out to tobacco extraction liquid and remove P
bion, namely carries out de-plumbous process;
C, the change passing through diluting compartment internal conductance rate in de-plumbous processing procedure or P
bactual content control de-plumbous degree; Detect nicotine content and organic acid total amount in diluting compartment simultaneously and take off the selective of plumbous process to investigate;
D, by the tobacco extraction liquid after de-lead according to papermaking-method reconstituted tobaccos production technology proceed process, for the processing of reconstituted tobacco.
2. P in papermaking-method reconstituted tobaccos extract according to claim 1
bthe selective reduction method of content, is characterized in that: the solid content of described tobacco extraction liquid is 7-10%.
3. P in papermaking-method reconstituted tobaccos extract according to claim 1
bthe selective reduction method of content, is characterized in that: the cation-exchange membrane of described electrodialysis plant is homogeneous phase cation exchange film.
4. P in papermaking-method reconstituted tobaccos extract according to claim 1
bthe selective reduction method of content, is characterized in that: the flow of electrodialysis process described in step b is 4-8L/min; Constant current density is 15-30mA/cm
2.
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Citations (7)
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|---|---|---|---|---|
| US4253929A (en) * | 1980-03-05 | 1981-03-03 | Philip Morris Incorporated | Method for denitration of tobacco employing electrodialysis |
| US4302308A (en) * | 1980-03-05 | 1981-11-24 | Philip Morris, Inc. | Method for electrolytic denitration of tobacco |
| CN102406230A (en) * | 2011-07-05 | 2012-04-11 | 中国海诚工程科技股份有限公司 | Method for removing heavy metal ions from tobacco extract |
| CN103082394A (en) * | 2013-01-25 | 2013-05-08 | 安徽中烟工业有限责任公司 | Regulation and control method for paper-making method reproducing tobacco leaf extract liquor negative ion components |
| CN103553248A (en) * | 2013-10-23 | 2014-02-05 | 中南大学 | Heavy metal waste acid and wastewater resource recycling method and device |
| CN104351943A (en) * | 2014-09-09 | 2015-02-18 | 安徽中烟工业有限责任公司 | Method for reducing TSNA (tobacco-specific nitrosamines) content and nitrate content of reconstituted tobacco concentrated solution according to electrodialysis method |
| CN104437389A (en) * | 2014-11-27 | 2015-03-25 | 昆明理工大学 | Preparation method and application of adsorbent for treating lead-containing waste water |
-
2015
- 2015-08-28 CN CN201510547778.9A patent/CN105146721A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4253929A (en) * | 1980-03-05 | 1981-03-03 | Philip Morris Incorporated | Method for denitration of tobacco employing electrodialysis |
| US4302308A (en) * | 1980-03-05 | 1981-11-24 | Philip Morris, Inc. | Method for electrolytic denitration of tobacco |
| CN102406230A (en) * | 2011-07-05 | 2012-04-11 | 中国海诚工程科技股份有限公司 | Method for removing heavy metal ions from tobacco extract |
| CN103082394A (en) * | 2013-01-25 | 2013-05-08 | 安徽中烟工业有限责任公司 | Regulation and control method for paper-making method reproducing tobacco leaf extract liquor negative ion components |
| CN103553248A (en) * | 2013-10-23 | 2014-02-05 | 中南大学 | Heavy metal waste acid and wastewater resource recycling method and device |
| CN104351943A (en) * | 2014-09-09 | 2015-02-18 | 安徽中烟工业有限责任公司 | Method for reducing TSNA (tobacco-specific nitrosamines) content and nitrate content of reconstituted tobacco concentrated solution according to electrodialysis method |
| CN104437389A (en) * | 2014-11-27 | 2015-03-25 | 昆明理工大学 | Preparation method and application of adsorbent for treating lead-containing waste water |
Non-Patent Citations (1)
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| 向海英等: "烟梗提取液中氯离子的电渗析法脱除", 《烟草科技》 * |
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Application publication date: 20151216 |