Extraction of nicotine from waste tabacco leaf and offal by lactescence membrane method

Abstract

This invention relates to a emulsion membrane process of extracting nicotine from waste tobacco and cabo. (1) dissolve out nicotine from waste tobacco and cabo.(2) produce Water in oil ( W / O) type emulsion membrane; (3) filtration and enrichment; (4) emulsion breaking, use high tension electricity scintilla emulsion breaker to emulsion break the oil layer obtained from step third, the High Voltage of emulsion breaker at least reach 2500v. After emulsion breaking, return oil phase to step two for realizing cyclic utilization, and use sodium carbonate to neutralize obtained water phase as far as vitriol without surplus, then obtain tobacco juice solution of certain concentration. The characteristic of this invention consist in: (1) remedy and reagent adopted has low price, profit space is large; (2) nicotinic extraction yield high, and concentration of nicotine sulfate solution after emulsion breaking is large, could be used as raw material of further purification high concentration nicotin, and also could be directly used as pesticide after simple manipulation;(3) used solution has smallness erosion to equipment;(4) pollute fewness, even pollution-free.

Description

Technical field: [0001] The invention relates to a method for extracting nicotine in waste tobacco leaves and tobacco stems, in particular to a method for extracting nicotine in waste tobacco leaves and tobacco stems by using an emulsion liquid film, and belongs to the technical field of chemical engineering. Background technique: [0002] Nicotine (nicotine) is a kind of agricultural chemical product that has just entered the market in the past 20 years, and it is a best-selling product at home and abroad. However, there are not many companies producing nicotine at home and abroad, and there are even fewer companies producing nicotine in my country. According to preliminary statistics, there are only about 15 companies. These companies mainly produce nicotine sulfate, phosphate and citrine. , the output is very small, and most of them are self-produced and used for their own use, and the export sales are very small, and there are almost no manufacturers producing pure nicoti...

AI Technical Summary

Problems solved by technology

The extractant used in the former (such as trichloroethylene, trichloromethane, dichloropropene, etc.) is seriously volatile and emulsified, resulting in a large loss of extractant (the recovery rate of the extractant is only 70%)

At the same time, the extractant trichlorethylene is a carcinogen, which seriously pollutes operators and the environment, and the extraction operation must be carried out at a relatively high temperature (70-110°C), which consumes a lot of energy; the latter ion exchanger is prone to aging and difficult to regenerate ,high cost

And foreign countries have carried out nicotine production with supercritical carbon dioxide extraction, acid-base treatment, acid-base pretreatment, column chromatography separation and purification of nicotine methods. Although this method has been improved, there are still technical problems in this method. Complexity, high equipment investment and maintenance costs, high design and manufacturing technology requirements, and the extraction cannot be continuously operated, and the production capacity is low. At the same time, a large amount of waste water and waste residue are generated during the production process, causing environmental pollution.