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Method extracting waste tobacco at subcritical DMC

A subcritical and extraction technology, applied in the fields of tobacco, solvent extraction, and tobacco treatment, can solve the problems of easy thermal denaturation, large one-time investment in fixed assets, and high production costs, so as to solve the technical bottleneck problem, improve the comprehensive utilization rate, The effect of low production running costs

Inactive Publication Date: 2005-10-19
侯金荣 +1
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  • Application Information

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Problems solved by technology

[0015] ①Traditional extraction method, the comprehensive extraction ability of tobacco active ingredients is weak, the product is easily denatured or lost by heat during the production process, the energy consumption is large, the solvent loss is large, and the solvent recovery is difficult, which makes it difficult to solve the three wastes problem;
[0016] ②The supercritical carbon dioxide fluid extraction method overcomes the above-mentioned deficiencies, but due to the large volume of tobacco and the small bulk density, the processing capacity of each extraction is very small, and the operating pressure is high, so the one-time investment in fixed assets is large, and the production High cost, it is difficult to process materials on a large scale at low cost

Method used

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  • Method extracting waste tobacco at subcritical DMC

Examples

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Effect test

example 1

[0043] 100kg tobacco leaves are packed in the extraction kettle, start the vacuum pump to remove the air in the extraction kettle, the main solvent is added in the tobacco leaves by the weight ratio of tobacco leaf: main solvent=1: 6, add and account for 1% ethanol by weight, at a temperature of Under the technological conditions of 30°C and pressure of 0.5Mpa, extract three times continuously, each extraction time is 30 minutes, and the first two extracts are separated in the separation tank under the technological conditions of temperature of 30°C and pressure of 0.1Mpa 3kg, then add the above third extraction solution by tobacco leaf: extraction solution=1:2 weight ratio, add water that accounts for 1% by weight, at a temperature of 30 ° C, a pressure of 0.5Mpa process conditions, extract 30 Minutes, at a temperature of 30°C and a pressure of 0.1Mpa, 3.2kg of crude nicotine was separated.

example 2

[0045] 100kg tobacco leaves are packed in the extraction kettle, start the vacuum pump to remove the air in the extraction kettle, the main solvent is added in the tobacco leaves by the weight ratio of tobacco leaves: main solvent=1: 15, add and account for 5% ethanol by weight, at a temperature of Under the technological conditions of 60°C and pressure of 1.75Mpa, extract three times continuously, each extraction time is 60 minutes, and the first two extracts are separated in the separation tank under the technological conditions of temperature of 60°C and pressure of 0.25Mpa 4.3kg, then add the above third extract by tobacco leaves: extract = 1:5 weight ratio, add water that accounts for 5% by weight, at a temperature of 60 ° C, a pressure of 1.25Mpa process conditions, extraction After 60 minutes, 4.3kg of crude nicotine was separated under the process conditions of a temperature of 60°C and a pressure of 0.25Mpa.

example 3

[0047] 100kg tobacco leaves are packed in the extraction kettle, start the vacuum pump to remove the air in the extraction kettle, the main solvent is added in the tobacco leaves by the weight ratio of tobacco leaves: main solvent=1: 24, add and account for 10% ethanol by weight, at a temperature of Under the technological conditions of 90°C and pressure of 3Mpa, extract three times continuously, each extraction time is 90 minutes, and the first two extracts are separated in the separation tank under the technological conditions of temperature of 90°C and pressure of 0.5Mpa. kg, then add the above third extraction solution by tobacco leaf: extraction solution=1:8 weight ratio, add water that accounts for 10% by weight, at a temperature of 90 ° C, under the pressure of 2Mpa process conditions, extract for 90 minutes , at a temperature of 90°C and a pressure of 0.5Mpa, 4.9kg of crude nicotine was separated.

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Abstract

The present invention discloses subcritical dimethyl ether (DME) method of extracting waste tobacco. The technology adopts DME at subcritical state as main solvent in extracting waste tobacco, and through altering the temperature and pressure of the main solvent and adding different kinds of co-solvent in different amount, tobacco extractum, coarse solanesol extractum and coarse nicotine are extracted selectively.

Description

technical field [0001] The invention relates to a method for extracting tobacco, in particular to a method for subcritical DME for extracting waste tobacco. Background technique [0002] Tobacco is the most widely grown commercial non-food foliar cash crop in the world. my country's tobacco planting area and output rank first in the world. Tobacco planting and processing play an important role in the development of the national economy. At present, tobacco planted at home and abroad is mainly used as cigarettes. my country is a large tobacco producing country with an annual tobacco output of 450-500 10,000 tons, of which 900,000-1.5 million tons of tobacco waste cannot be used in the cigarette industry, and the main substances in tobacco waste that have value for development and utilization cannot be effectively utilized, resulting in waste of resources and environmental pollution. Taking Yunnan Province as an example, about 20-35% of the annual flue-cured tobacco production...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A24B15/18A24B15/24A24B15/26B01D11/00B01D11/02
Inventor 罗波侯金荣侯金春侯金华
Owner 侯金荣
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