Litsea cubeba nucleolus deep-processing and comprehensive utilization process

Abstract

The invention provides a technique for deeply processing and comprehensively utilizing of a litsea cubeba kernel. In the invention, the litsea cubeba kernel is crushed and subject to heated reflux extraction in a Soxhlet extractor for 0.5 to 4 hours by taking a low boiling point nonlinear solvent as an extraction solvent, and the litsea cubeba kernel oil is obtained; the obtained litsea cubeba kernel oil, methanol, concentrated sulfuric acid and anhydrous sodium sulfate are mixed according to the ratio of 100:(between15 and 50):(between 1and 2):(between 3 and 5) and then put in a reaction kettle for degreaseing reaction, after the reaction, the mixed liquid are added with the anhydrous sodium sulfate to neutralize the sulphuric acid so as to obtain solid salt, by the reduced pressure distillation, the methanol is recovered and the moisture is dried, and the solid salt is removed by centrifugation; the obtained filtrate, the methanol, a phase transfer catalyst and sodium hydroxide are mixed according to the ratio of 100:(between15 and 50):(between 0.1 and 1):(between 0.5 and 2) and then put in the reactor reaction kettle for ester exchange reaction, after the reaction, the concentrated sulfuric acid are added to neutralize the sodium hydroxide, the obtained mixed liquid are kept stand and layered, the upper layer of coarse biodiesel is subject to the reduced pressure distillation to obtain the finished biodiesel, and the lower layer of the methanol and the glycerin are vaporized to recover the methanol for repeated use.

Description

[technical field] [0001] The invention relates to a new technology for deep processing and comprehensive utilization of litsea cubeba nucleolus. [Background technique] [0002] After the Litsea Cube Seeds are steam-distilled to prepare high-value-added Litsea Cube Seed Essential Oil, a large amount of Litsea Cube Seed Nucleolus remains, which seriously pollutes the environment. At present, a very small amount of litsea cubeb kernels are used to process litsea cubeba kernel oil, which can be used in daily chemical products instead of coconut oil after decolorization and degumification. However, due to the low added value and low conversion rate, there is no industrialization report at present, so a large number of litsea cubeba kernels are generally discarded as waste, resulting in a great waste of resources. There are many patented methods for preparing biodiesel from rapeseed oil, soybean oil, gutter oil and other oils, mainly including acid catalysis, alkali catalysis, en...

AI Technical Summary

Problems solved by technology

The use of liquid acid and alkali catalysts will produce a large amount of waste water discharge, causing environmental pollution; the separation of enzyme catalysis and heterogeneous catalysis products is relatively simple, but the reaction time is longer, and the catalyst cost is higher; the use of supercritical fluid technology, the reaction rate is fast, The yield is high, the separation and purification of the product is simple, and the adaptability to oil raw materials is good, but the method needs to be carried out under high temperature and high pressure, and the requirements for equipment are quite high