Simple processing method for concentrated natural organic acid by taking biomass dry distillation acid as raw material

Abstract

The invention discloses a simple processing method for concentrated natural organic acid by taking biomass dry distillation acid as a raw material, and belongs to the fields of a new natural product separation and purification processing technology and organic food. The method comprises the following steps: carrying out low-temperature vacuum distillation on biomass dry distillation acid serving as a raw material, allowing the biomass dry distillation acid to stand in the sun so as to oxidize volatile phenolic substances into compounds such as benzenediol and quinone-hydroquinone which are not volatile, adding magnesium sulfate monohydrate to absorb water, and carrying out secondary vacuum medium-temperature distillation, so that the purity of concentrated acetic acid reaches 99.5% or above, and the phenol content is less than or equal to 1mg / L; according to the simple processing method for concentrated natural organic acid by taking the biomass dry distillation acid as the raw material, the prepared product reaches the standard of the organic food additive; meanwhile, repeated utilization of magnesium sulfate and cyclic utilization of energy are achieved, the cost is reduced, and energy is saved.

Description

technical field [0001] The invention belongs to the field of separation and purification processing technology of new natural products and organic food, and specifically relates to a simple and convenient processing method of concentrated natural organic acids using biomass retort acid as raw material. Background technique [0002] In today's society, the pollution of soil, water, air and other environments is very serious, which poses a serious threat to food safety. However, looking back at the history of the development of pollutants in my country, there are still some environments that have no or little human intervention, such as bamboo forests. And forests (non-economic forests), these places are rarely polluted, and the photosynthetic products they produce are natural products, which meet the harsh conditions of organic products. [0003] Bamboo wood vinegar contains nearly 200 kinds of natural high-molecular organic compounds, mainly organic acids, especially 3-9% ace...

AI Technical Summary

Problems solved by technology

Bamboo and wood vinegar has many functions, but its market application is not widespread or even limited. The main reasons are: 1) Bamboo and wood vinegar contains obvious toxic or even carcinogenic substances, such as phenols, although the content is rarely at a trace level , but various foods, food additives, pharmaceuticals and skin care products require trace levels of these harmful substances, most of which require mg / kg or even μg / kg or ng / kg levels, while bamboo wood vinegar is in accordance with GB / T31734-2015 Bamboo vinegar standard, the dissolved tar content is 1.20-1.50% of refined bamboo vinegar, 0.08-0.10% of distilled bamboo vinegar. As we all know, various phenolic substances account for more than 50% of tar, and the standard phenolic content is required to be 400000- 7,500,000μg / kg, even according to the best bamboo and wood vinegar in the market, it is 400,000μg / kg, referring to the "Drinking Water Sanitation Standard" (GB5749-2006) for volatile phenol content requirements ≤ 2μg / kg, a full 200,000 times higher than the standard, it can be seen that It is far from reaching the edible standard, and obviously bamboo and wood vinegar is far from meeting the requirements; 2) Bamboo and wood vinegar has an unpleasant smell, which is likely to cause consumers' disgust; in a word, removing harmful substances such as phenols from bamboo and wood vinegar, its Technology determines whether the use of bamboo and wood vinegar can be expanded and used safely

Patent ZL201910027997.2 A method for dewatering, concentrating and separating tar from vegetable vinegar. The first step is to directly add desiccant to the stock solution of bamboo and wood vinegar, so that a large amount of phenolic substances will enter the product, and the quality of vegetable vinegar must be used. A large number of organic solvents with a fraction of 1-20 times not only increases the cost, but some organic solvents inevitably enter the final product due to the use of organic solvents, which affects product quality. The process does not take into account the problem of volatile phenols entering the final product during the distillation process, and the process is complicated It consumes a lot, and it is difficult to produce effectively under the goal of carbon peak and carbon neutrality. At the same time, because of the large amount of organic solvents used, there are still some questions about whether the product can be used as an organic product.

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