Method for recycling plant alkaloid from smokeless tobacco extract

Abstract

The invention provides a method for recycling plant alkaloid from smokeless tobacco extract. The method is characterized by comprising the following steps that: a pH regulator is added into the smokeless tobacco extract to form alkaline mixed liquor, so that the plant alkaloid in the smokeless tobacco extract is protonated; the alkaline mixed liquor is concentrated, and then extracted and concentrated again to obtain free plant alkali liquor, wherein the free plant alkaloid content of the free plant alkali liquor reaches 90% or above, and the nicotine content of the free plant alkali liquor reaches 80% or above; the free plant alkali liquor is separated by further combining a molecular distillation method, so that nicotine in the free plant alkali liquor can be recycled, and the recovery rate of the nicotine reaches 90% or above; as the extracted free plant alkali liquor and the recycled nicotine are protonated products, the taste is good, the strength is stronger, however, the irritation to the larynx is weaker; through the method, tobacco waste can be recycled, so that the environmental pollution is reduced, and the advantages of environmental friendliness, safety and high efficiency, simple technology and no pollution are realized.

Description

technical field

[0001] The invention relates to the field of plant extraction and separation, in particular to a method for recovering plant alkaloids from tobacco extract. Background technique

[0002] As a big tobacco country, my country has a huge tobacco processing industry, and correspondingly produces a large amount of waste in tobacco processing, among which tobacco leaves, tobacco stems, and tobacco seeds account for about 25% of the quality of tobacco leaves. The waste of these tobacco leaves, the tobacco dust in processing and the tobacco stems discarded by tobacco farmers are all important sources of extracting nicotine. There are tens of thousands of tons of tobacco waste in my country every year for the production of nicotine. The "resource" utilization of these wastes can not only obtain natural chemical raw materials or fuels that meet green health standards, but also achieve clean agriculture and waste transformation. For the purpose of treasure, the sustaina...

Examples

Embodiment 1

[0071] A method for recovering plant alkaloids from tobacco extract, comprising the steps of:

[0072] Step a. Get 50kg of waste water from reconstituted tobacco leaves and stems, add sodium hydroxide and ammonia water to adjust the pH to form an alkaline mixed solution of 10, then heat and concentrate to obtain a 12kg concentrated solution, add 10L of dichloromethane and Ethyl acetate (volume ratio: 1:2) mixed with the extractant, stirred and mixed for 5 minutes, centrifuged at 1000rpm for 3 minutes to obtain the extract, that is, the organic phase;

[0073] Step b. Take the extract, evaporate and concentrate the thin film at 35°C until there is no obvious reagent smell, to obtain free plant lye, add propylene glycol to the free plant lye, and the mass ratio of the propylene glycol to the free plant lye is 1 : 3, use 2mol / l ammonia water to adjust the pH to 8, stir and mix for 5min;

[0074] Step c. Use molecular distillation equipment to distill the free plant lye after pH ...

Embodiment 2

[0078] A method for recovering plant alkaloids from tobacco extract, comprising the steps of:

[0079]Step a. Get 50kg of waste water from reconstituted tobacco leaves and stems, add sodium hydroxide and ammonia water to regulate the formation of an alkaline mixed solution with a pH of 10, then heat and concentrate to obtain a 12kg concentrated solution, add 10L of dichloromethane and The extraction agent mixed with ethyl acetate (volume ratio 1:5), stirred and mixed for 5 minutes, centrifuged at 1000rpm for 3 minutes to obtain the extract, that is, the organic phase;

[0080] Step b. Take the extract, evaporate and concentrate the thin film at 35°C until there is no obvious reagent smell, and obtain free plant lye, add propylene glycol to the free plant lye, and the mass ratio of the propylene glycol to the free plant lye is 1 : 3, use 2mol / l ammonia water to adjust the pH to 8, stir and mix for 5min;

[0081] Step c. Use molecular distillation equipment to distill the free ...

Embodiment 3

[0085] A method for recovering plant alkaloids from tobacco extract, comprising the steps of:

[0086] Step a. Get 50kg of waste water from reconstituted tobacco leaves and stems, add sodium hydroxide and ammonia water to regulate the formation of an alkaline mixed solution with a pH of 10, then heat and concentrate to obtain a 12kg concentrated solution, add 10L of ethyl acetate and The extractant mixed with petroleum ether (volume ratio 1:4), stirred and mixed for 5 minutes, centrifuged at 1000rpm for 3 minutes to obtain the extract, that is, the organic phase;

[0087] Step b. Take the extract, evaporate and concentrate the thin film at 35°C until there is no obvious reagent smell, and obtain free plant lye, add propylene glycol to the free plant lye, and the mass ratio of the propylene glycol to the free plant lye is 1 : 3, use 2mol / l ammonia water to adjust the pH to 8, stir and mix for 5min;

[0088] Step c. Use molecular distillation equipment to distill the free plant...

technical field

[0001] The invention relates to the field of plant extraction and separation, in particular to a method for recovering plant alkaloids from tobacco extract. Background technique

[0002] As a big tobacco country, my country has a huge tobacco processing industry, and correspondingly produces a large amount of waste in tobacco processing, among which tobacco leaves, tobacco stems, and tobacco seeds account for about 25% of the quality of tobacco leaves. The waste of these tobacco leaves, the tobacco dust in processing and the tobacco stems discarded by tobacco farmers are all important sources of extracting nicotine. There are tens of thousands of tons of tobacco waste in my country every year for the production of nicotine. The "resource" utilization of these wastes can not only obtain natural chemical raw materials or fuels that meet green health standards, but also achieve clean agriculture and waste transformation. For the purpose of treasure, the sustaina...

Examples

Embodiment 1

[0071] A method for recovering plant alkaloids from tobacco extract, comprising the steps of:

[0072] Step a. Get 50kg of waste water from reconstituted tobacco leaves and stems, add sodium hydroxide and ammonia water to adjust the pH to form an alkaline mixed solution of 10, then heat and concentrate to obtain a 12kg concentrated solution, add 10L of dichloromethane and Ethyl acetate (volume ratio: 1:2) mixed with the extractant, stirred and mixed for 5 minutes, centrifuged at 1000rpm for 3 minutes to obtain the extract, that is, the organic phase;

[0073] Step b. Take the extract, evaporate and concentrate the thin film at 35°C until there is no obvious reagent smell, to obtain free plant lye, add propylene glycol to the free plant lye, and the mass ratio of the propylene glycol to the free plant lye is 1 : 3, use 2mol / l ammonia water to adjust the pH to 8, stir and mix for 5min;

[0074] Step c. Use molecular distillation equipment to distill the free plant lye after pH ...

Embodiment 2

[0078] A method for recovering plant alkaloids from tobacco extract, comprising the steps of:

[0079]Step a. Get 50kg of waste water from reconstituted tobacco leaves and stems, add sodium hydroxide and ammonia water to regulate the formation of an alkaline mixed solution with a pH of 10, then heat and concentrate to obtain a 12kg concentrated solution, add 10L of dichloromethane and The extraction agent mixed with ethyl acetate (volume ratio 1:5), stirred and mixed for 5 minutes, centrifuged at 1000rpm for 3 minutes to obtain the extract, that is, the organic phase;

[0080] Step b. Take the extract, evaporate and concentrate the thin film at 35°C until there is no obvious reagent smell, and obtain free plant lye, add propylene glycol to the free plant lye, and the mass ratio of the propylene glycol to the free plant lye is 1 : 3, use 2mol / l ammonia water to adjust the pH to 8, stir and mix for 5min;

[0081] Step c. Use molecular distillation equipment to distill the free ...

Embodiment 3

[0085] A method for recovering plant alkaloids from tobacco extract, comprising the steps of:

[0086] Step a. Get 50kg of waste water from reconstituted tobacco leaves and stems, add sodium hydroxide and ammonia water to regulate the formation of an alkaline mixed solution with a pH of 10, then heat and concentrate to obtain a 12kg concentrated solution, add 10L of ethyl acetate and The extractant mixed with petroleum ether (volume ratio 1:4), stirred and mixed for 5 minutes, centrifuged at 1000rpm for 3 minutes to obtain the extract, that is, the organic phase;

[0087] Step b. Take the extract, evaporate and concentrate the thin film at 35°C until there is no obvious reagent smell, and obtain free plant lye, add propylene glycol to the free plant lye, and the mass ratio of the propylene glycol to the free plant lye is 1 : 3, use 2mol / l ammonia water to adjust the pH to 8, stir and mix for 5min;

[0088] Step c. Use molecular distillation equipment to distill the free plant...