Method of controlling contents of nitrate and nitrite in tobacco reconstituted in papermaking method

A technology of nitrite and reconstituted tobacco leaves, applied in the direction of tobacco, tobacco preparation, application, etc., to achieve the effects of low cost, high removal rate, and convenient content control

Inactive Publication Date: 2013-10-02
YUNNAN RES INST OF TOBACCO SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the limit standards for the release of nitrite and smoke nitrosamines from paper-making reconstituted tobacco leaf products have not yet been establ

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] In the installation there are 20 pairs of INOSEP TM Ion exchange membrane, in an electrodialysis device with an effective separation area of ​​1 square meter, add 6 kg of pretreated tobacco stem extract with an initial conductivity of 15.2 mS / cm and a concentration of 8% in the dilute chamber, and add it to the concentrated chamber Add 2 kg of deionized water to the medium, adjust the DC voltage to 8V, the flow rate of tobacco stem extract to 6L / min, the flow rate of deionized water to 2L / min, and stop electrodialysis when the conductivity of the fresh chamber reaches 3.75 mS / cm, and denitrate The working curve of nitrite and nitrite shows that the removal rate of nitrate and nitrite of the material is 95% and 97% respectively, and the actual measurement is 99% and 99%.

Embodiment 2

[0019] In the installation there are 40 pairs of INOSEP TM Ion exchange membrane, in an electrodialysis device with an effective separation area of ​​1.8 square meters, add 6 kg of pretreated tobacco stem extract with an initial conductivity of 23.7 mS / cm and a concentration of 20% in the dilute chamber, and put it in the concentrated chamber Add 18 kg of tap water to the medium, adjust the DC voltage to 80V, the flow rate of the tobacco stem extract to 2L / min, the flow rate of deionized water to 6L / min, and stop the electrodialysis when the conductivity of the fresh chamber reaches 6.56 mS / cm. The nitrate working curve shows that the nitrate and nitrite removal rates of the material are 78% and 80% respectively, and the actual measurements are 81% and 82%.

Embodiment 3

[0021] In the installation there are: 20 pairs of INOSEP TM Ion exchange membrane, in an electrodialysis device with an effective separation area of ​​1 square meter, add 5 kg of pretreated tobacco leaf extract with an initial conductivity of 12.4 mS / cm and a concentration of 8% in the dilute chamber, and add it to the concentrated chamber Add 3 kg of tap water, adjust the DC voltage to 20V, the flow rate of the tobacco stem extract to 9L / min, the flow rate of the tap water to 6L / min, stop the electrodialysis when the conductivity of the fresh chamber reaches 1.17 mS / cm, and denitrate and nitrite work The curve shows that the nitrate and nitrite removal rates of the material are 98% and 98% respectively, and the actual measurement is 100% and 100%.

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Abstract

The invention relates to a method of controlling contents of nitrate and nitrite in tobaccos reconstituted in a papermaking method, belonging to the technical field of reconstituting tobaccos in the papermaking method. The method is an improvement, and the improved points include that a, an electrodialysis desalination procedure is added between a procedure for solid-liquid separation and extraction of raw materials of tobaccos and a procedure for extract concentration and coating preparation; b, the electrodialysis procedure comprises pretreatment and electrodialysis desalination of extract of the raw materials of the tobaccos; c, for the electrodialysis desalination, the voltage is set as 0.4-2.0V for each pair of ion exchange films, the flow phase in a concentrated chamber is deionized water or tap water, the quantity relative ratio of flow phases in a dilute chamber and the concentrated chamber is 3:1 to 1:3, the flow ratio is 3:1 to 1:3, and the initial material concentration in the dilute chamber is less than or equal to 20 percent; and d, control of degrees of nitrate and nitrite removal: the removal of nitrate and nitrite is controlled according to a correlation curve of the decrease rate of conductance after material desalination in the dilute chamber and the amount of the removed nitrate and nitrite. The method has the advantages that the rate of nitrate and nitrite removal is high, material losses are low, the contents of nitrate and nitrite can be controlled conveniently, the cost is low, and the application value is high.

Description

Technical field: [0001] The invention relates to a method for controlling the content of nitrate and nitrite in reconstituted tobacco leaves by papermaking method, and belongs to the technical field of reconstituted tobacco leaves by papermaking method. Background technique: [0002] Nitrosamines are harmful substances in cigarette smoke. One type is tobacco-specific nitrosamines (TSNA), such as NNK, NNN, NAB, and NAT, and the other is non-tobacco-specific nitrosamines, such as N-nitrosamines. Nitromethylamine, N-nitrosopyrrolidine, etc. It is generally believed that there are two sources of nitrosamines in cigarette smoke. One of the routes is that the nitrosamines formed before smoking cigarettes are mainly produced during the baking, drying, and aging processes of tobacco leaves, and interact with certain microorganisms and It is related to the activity of tobacco enzymes; another way is the production of cigarette smoking process, which is synthesized by tobacco-specifi...

Claims

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Application Information

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IPC IPC(8): A24B3/14
Inventor 孔宁川王保兴徐广晋刘晶王建向海英简彬王浩雅殷艳飞马迅和智君
Owner YUNNAN RES INST OF TOBACCO SCI
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