Single-tower continuous rectification method of eucalyptus oil

Abstract

The invention discloses a single-tower continuous rectification method of eucalyptus oil, which is characterized by comprising the following steps of: continuously feeding and discharging to continuously extract light components, the eucalyptus oil, reactor residues and other materials at the extracting ports of different products with the eucalyptus oil of eucalyptus globulus labill or the eucalyptus oil of cinnamomum camphora as raw materials under different processes of the single rectification tower; and continuously rectifying the eucalyptus oil in the single tower, adjusting the reflux ratio and controlling the distillation temperature according to the quality condition of the material at the extracting ports to achieve the purpose of extracting the eucalyptus oil with different contents of cineole. In the invention, the content of the cineole in the eucalyptus oil product is mostly up to 92%, the daily processing quantity of the raw materials is 10 tons per day, the production loss is not more than 1% and the yielding rate of 80% of the eucalyptus oil is more than 75%; compared with the discontinuous rectification, the production efficiency of the invention is improved by 10 times; and in addition, the invention has the advantages of great treatment capability, stable quality of product, high utilization ratio of the raw materials, lower energy consumption and the like.

Description

technical field [0001] The invention relates to a method for refining eucalyptus oil, in particular to a single-tower continuous distillation method for eucalyptus oil. Background technique [0002] The minimum content of eucalyptol is 80% Eucalyptus oil (referred to as 80% eucalyptus oil) is a bulk commodity in the field of spices. The annual domestic production of eucalyptus oil raw materials is 15,000 tons, and 80% eucalyptus oil is about 8,000 tons. The products are mainly used for export. . 80% eucalyptus oil has bactericidal and antiseptic functions, and is mostly used for medicine. It is one of the main components of essential oils and cool oils. It can be used in combination with other medicines to treat various colds, infections, tuberculosis and various skin diseases. It is used in stomatology It also has a good effect on dentistry, and can be used to treat respiratory diseases, control appetite, lose weight, etc.; eucalyptus oil is also used in cosmetics, soaps, ...

AI Technical Summary

Problems solved by technology

[0004] 1) The production efficiency is low. The daily processing capacity is only 1-1.5 tons when batch distillation is adopted for the rectification tower with the same diameter. The insufficient daily processing capacity leads to low production efficiency and increased cost;

[0005] 2) The extraction rate of 80% eucalyptus oil produced by batch distillation is about 50%, and a large number of eucalyptus oil products with 30-70% eucalyptol content are produced at the same time, and the product price of this content range Low, limited market capacity, resulting in unbalanced production and sales of enterprises;

[0006] 3) The extraction rate is low and the material consumption increases, making the production cost higher;

[0007] 4) Batch rectification needs to empty the still residue after each rectification, and then re-feed to carry out the next round of rectification operation, which increases labor intensity and energy consumption, and reduces the utilization rate of rectification tower;

[0008] 5) Unstable product quality

Compared with the traditional batch rectification process, this method has been improved to a certain extent, but it still belongs to the category of batch rectification. It only adds a rectification tower, and directly rectifies the raffinate of the first tower, saving the waste of waste water. The step of re-feeding the raffinate in the empty tank, but the double-tower continuous rectification technology not only needs two rectification towers, but also increases the pretreatment steps, which increases the production cost, and the extraction rate of 80% eucalyptus oil is still Low, most of the products are eucalyptus oil with eucalyptol content below 80%