Method for removing heavy metal ions from tobacco extract

A technology of heavy metal ions and extracts, applied in tobacco, tobacco treatment, application, etc., can solve the problems of limited treatment efficiency, difficult treatment, complicated operation of biological treatment technology, etc., achieve simple steps, improve removal rate, and improve social benefits Effect

Active Publication Date: 2012-04-11
CHINA HAISUM ENG
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Chemical precipitation method, redox method, electrolysis method, solvent extraction separation method need to add other chemical substances in the solution to be purified, which is not suitable as a purification technology for heavy metal ions in tobacco extract; ion exchange method, adsorption method and membrane separation method The treatment efficiency is relatively limited; the operation of biological treatment technology is more complicated, and the treatment is more difficult
Therefore, these methods have certain limitations for the removal of heavy metal ions in tobacco extracts.

Method used

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  • Method for removing heavy metal ions from tobacco extract
  • Method for removing heavy metal ions from tobacco extract

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The tobacco extract filtered by the pulse filter (filtering precision is 0.3μm) is first passed through the electrolysis device for constant current electrolysis, the current density is 1000A / m 2 The electrolysis time is 2h. After the electrolysis treatment is completed, the heavy metals in the cathode chamber of the electrolysis device are recovered by sulfide precipitation method, and the tobacco extract after the electrolysis treatment is passed through a cation exchange resin column with a height-to-diameter ratio of 10:1. The flow rate of the tobacco extract in the cation exchange resin column is 1 bed volume / h, and the effluent is taken under the ion exchange column to obtain the tobacco extract that removes heavy metal ions. The saturated cation exchange resin column is regenerated with a hydrochloric acid solution with a concentration of 2% by volume and reused. At the same time, the heavy metal ions in the eluent are subjected to the sulfide precipitation method (...

Embodiment 2

[0028] The tobacco extract filtered by a pulse filter (with a filtration accuracy of 5μm) is first passed through the electrolysis device for constant current electrolysis, with a current density of 800A / m 2 The electrolysis time is 2h. After the electrolysis treatment is completed, the heavy metals in the cathode chamber of the electrolysis device are recovered by sulfide precipitation method, and the tobacco extract after the electrolysis treatment is passed through a cation exchange resin column with a height-to-diameter ratio of 10:1. The flow rate of the tobacco extract in the cation exchange resin column is 3 times the bed volume / h, and the effluent is taken under the ion exchange column to obtain the tobacco extract with heavy metal ions removed. The saturated cation exchange resin column is regenerated with a 10% hydrochloric acid solution by volume percentage and reused. At the same time, the heavy metal ions in the eluent are subjected to the sulfide precipitation metho...

Embodiment 3

[0031] The tobacco extract filtered by the pulse filter (filtering precision is 3μm) is first passed through the electrolysis device for constant current electrolysis, the current density is 600A / m 2 The electrolysis time is 2h. After the electrolysis treatment is completed, the heavy metals in the cathode chamber of the electrolysis device are recovered by sulfide precipitation method, and the tobacco extract after the electrolysis treatment is passed through a cation exchange resin column with a height-to-diameter ratio of 10:1. The flow rate of the tobacco extract in the cation exchange resin column is 5 times the bed volume / h, and the effluent is taken under the ion exchange column to obtain the tobacco extract from which heavy metal ions are removed. The saturated cation exchange resin column is regenerated with 5% hydrochloric acid solution by volume percentage and reused. At the same time, the heavy metal ions in the eluent are subjected to the sulfide precipitation method...

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PUM

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Abstract

The invention provides a method for removing heavy metal ions from tobacco extract, which is characterized by comprising: filtering the tobacco extract with a pulse filter; subjecting the filtrate to electrolysis in an electrolysis device; and loading the tobacco extract subjected to electrolysis treatment onto a cation exchange resin column to obtain tobacco extract without heavy metal ions. In the invention, most heavy metal ions in the tobacco extract is removed by the electrolysis device, then trace amount of heavy metal ions in the tobacco extract are further removed by the cation exchange resin, and thus, the removal rate of heavy metal ions is increased, and the service life of the resin is prolonged.

Description

technical field [0001] The invention relates to a method for removing heavy metal ions in tobacco extract. Background technique [0002] Tobacco extract is made of raw materials such as tobacco stems, tobacco powder, shredded tobacco leaves and low-grade tobacco leaves, and the water-soluble substances such as tobacco tar are extracted through a continuous extraction process, and then the particles in the extract are removed, and finally reverse osmosis obtained by membrane separation process. The tobacco extract is concentrated, coated on the tobacco sheet substrate, dried to obtain the tobacco sheet, shredded and blended in cigarette production. At present, tobacco flakes have been widely used in cigarettes. For example, the blending rate of well-known international brands has reached 25%, while the blending rate of Chinese cigarette brands is also about 10% on average, and it shows an increasing trend year by year. [0003] In recent years, the harm of heavy metal ions...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A24B15/18A24B15/26
Inventor 吴立群杨娇贺磊
Owner CHINA HAISUM ENG
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