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Method for extracting nicotine in tobacco wastewater

A technology for waste water and tobacco, applied in the direction of organic chemistry, etc., can solve problems such as nicotine extraction reports that have not been found, and achieve the effects of reducing pollution discharge pressure, improving efficiency, and reducing organic matter concentration

Inactive Publication Date: 2015-03-04
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The extraction methods of nicotine in tobacco leaves mainly include ion exchange method, extraction method, distillation method, etc., but there is no report on the extraction of nicotine in tobacco wastewater.

Method used

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  • Method for extracting nicotine in tobacco wastewater
  • Method for extracting nicotine in tobacco wastewater
  • Method for extracting nicotine in tobacco wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for extracting nicotine in tobacco waste water, the process flow chart is as follows image 3 shown, including the following steps:

[0027] (1) Take 200mL of tobacco flake wastewater, adjust the pH value of the tobacco wastewater to 12 with NaOH solution, stir for 1h (i.e. leaching for 1h), and then add 30mL of CHCl 3 After shaking for 20 minutes, the organic phase is obtained by standing and stratifying; the organic phase enters the next operation of stripping, and the aqueous phase returns to the extraction step;

[0028] (2) add 30% (mass) sulfuric acid solution to the organic phase that step (1) obtains and carry out back extraction, obtain aqueous phase nicotine sulfate solution and organic phase 2, organic phase 2 returns organic phase, and aqueous phase enters next operate;

[0029] (3) Add Ba(OH) to the nicotine sulfate solution obtained in step (2) 2 The excess sulfuric acid was removed from the solution, and then nicotine sulfate was obtained by d...

Embodiment 2

[0033] A method for extracting nicotine in tobacco waste water, comprising the following steps:

[0034] (1) Take 200mL of tobacco flake wastewater, adjust the pH value of the tobacco wastewater to 11 with NaOH solution, stir for 2h, and then add 30mL of CHCl 3 After shaking for 20 minutes, the organic phase is obtained by standing and stratifying; the organic phase enters the next operation of stripping, and the aqueous phase returns to the extraction step;

[0035] (2) adding 20% ​​(mass) sulfuric acid solution to the organic phase obtained in step (1) for back extraction to obtain nicotine sulfate solution;

[0036] (3) Add Ba(OH) to the nicotine sulfate solution obtained in step (2) 2 The excess sulfuric acid was removed from the solution, and then nicotine sulfate was obtained by distillation under reduced pressure.

[0037] After testing, the purity of the obtained nicotine sulfate is 90.76%.

Embodiment 3

[0039] A method for extracting nicotine in tobacco waste water, comprising the following steps:

[0040] (1) Take 200mL of tobacco flake wastewater, adjust the pH value of the tobacco wastewater to 13 with NaOH solution, stir for 2h, and then add 30mL of CHCl 3 After shaking for 30 minutes, the organic phase is obtained by standing and stratifying; the organic phase enters the next operation of stripping, and the aqueous phase returns to the extraction step;

[0041] (2) adding 20% ​​(mass) sulfuric acid solution to the organic phase obtained in step (1) for back extraction to obtain nicotine sulfate solution;

[0042] (3) Add Ba(OH) to the nicotine sulfate solution obtained in step (2) 2 The excess sulfuric acid was removed from the solution, and then nicotine sulfate was obtained by distillation under reduced pressure.

[0043] After testing, the purity of the obtained nicotine sulfate was 91.47%.

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Abstract

The invention discloses a method for extracting nicotine in tobacco wastewater. The method comprises the following steps: using an alkali solution to adjust the pH value of tobacco wastewater to 11-13, stirring for 1-2 h, then adding an organic solvent for extraction, shaking for 20-30 min, and standing for layering and further for obtaining the organic phase; adding a sulfuric acid solution with the mass concentration of 20-30% into the organic phase for reextraction, so as to obtain a nicotine sulfate solution; adding a salt solution into the nicotine sulfate solution, and then performing reduced-pressure distillation to obtain nicotine sulfate. The method provides a new approach for extraction of nicotine in tobacco wastewater. On the one hand, the method helps to substantially reduce the concentration of organics in wastewater and effectively improve the subsequent biochemical processing efficiency, and on the other hand, extracted nicotine can be further processed and used as a pharmaceutical-grade product.

Description

technical field [0001] The invention belongs to the technical field of resource utilization of tobacco waste water, and in particular relates to a method for extracting nicotine in tobacco waste water. Background technique [0002] Nicotine, namely nicotine (nicotine), it is a kind of main alkaloid in tobacco, and the content in tobacco leaf is about 1~3%. Nicotine can be used as a non-toxic insecticide for humans in agriculture, as a drug for lowering high blood pressure in medicine, and as a smoking cessation drug. [0003] In the production process of paper-making tobacco flakes, part of the nicotine enters the wastewater during the soaking and cleaning of shredded tobacco leaves and tobacco stems and the concentration of slurry. Some studies have shown that the nicotine content in this type of wastewater can reach more than 300 mg·L-1. In addition, the extraction of nicotine in wastewater can also reduce the pressure of subsequent wastewater treatment from the source. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D401/04
CPCC07D401/04
Inventor 莫立焕王聪聪鲁礼成何帅明
Owner SOUTH CHINA UNIV OF TECH
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