Comprehensive processing and utilization method of Qinglongyi for dyeing

Abstract

The invention discloses a comprehensive processing and utilization method of Qinglongyi for dyeing, comprising the following steps: the first step: selecting Qinglongyi; the second step: adding Qinglongyi to ethyl acetate solution and mixing chitosan degraded by ultrasonic waves Carry out the first extraction in the solution, obtain chitosan and juglone mixed solution and the Qinglongyi extracted for the first time, and reclaim ethyl acetate, the third step: adopt the double aqueous phase The high-temperature method is used for the second extraction to obtain a solution containing flavonoids and polyphenols, and then the concentrated solution is made by vacuum distillation. The concentrated solution extracted for the second time of the present invention can be used for plant dyeing, and the juglone quinone solution is used for the first extraction. For plant dyeing, the juglone solution extracted for the first time can also be used as an additive for plant dyes; the invention greatly improves the additional performance, and at the same time reduces the damage to the soil caused by waste Qinglongyi after processing by agriculture, forestry, food enterprises, and beverage enterprises.

Description

technical field [0001] The invention relates to the field of research and development and production of natural plant dyes, in particular to a comprehensive processing and utilization method for dyeing Qinglongyi. Background technique [0002] Green walnut skin is the peeling of immature hickory green skin. Qinglongyi is also hickory skin. In 2017, China's walnut production has reached 1.89 million tons, accounting for about 47% of global production. Walnut processed products are divided into primary products and deep-processed products. Among them, primary products include walnut kernels, pastries, beverages and other products; deep-processed products include: walnut oil , walnut protein, walnut powder, walnut milk and other products, so a large number of walnuts need to be processed every year. Before walnut processing, the green skin on the surface needs to be removed first. About 1 000kg of green skin. Because of the color of the green skin, it is easy to cause environ...

AI Technical Summary

Problems solved by technology

The lignin content in the green skin is high, it is not easy to rot, and the fertilizer efficiency is poor

Qinglongyi contains some flavonoids, polyphenols, naphthoquinones and other secondary metabolites, which can be used as dyes for plant dyeing. Although there are many components in Qinglongyi, the content of each component is not high. The separation of various components The purification is very complicated, the cost of separation is very high, and the uses of various components are different, and the differences are quite large, so that Qinglongyi cannot be applied to large-scale plant dyeing

[0003] The preparation of the existing Qinglongyi pigment components and the preparation method of multi-color hair dyes, because it is used for hair dyeing, adopts conventional extraction and separation methods. The production rate of traditional extraction methods is very low, especially with When juglone is the target product, since juglone begins to sublimate when it is higher than 60°C, it will volatilize with the evaporation of solvent or water, and the subsequent macroporous resin adsorption and ethanol elution are not only costly, but also accompanied by juglone loss, so the production rate will be lower