Foam distillation purification method

Abstract

A foam separation method for extraction and concentration of a surface active substance is different from traditional. The invention provides the foam rectification purification method which can extract, concentrate, rectify and purify the surface active substance. The method can be roughly divided into 7 steps: 1, estimating the contents of an objective component and an objective impurity in a material liquid; 2, determining the pH and the temperature T allowing the objective component to have highest surface activity in a tolerance range of the objective component; 3, determining the highest collect height beta and the corresponding apparent gas velocity Q; 4, determining the lowest collect height alpha; 5, determining the objective component enrichment ratio and recovery rate changed along with the height and between the height alpha and the height beta; 6, according to the data obtained in the steps 1-5 and according to purity requirements of a product, designing a purification strategy, trying to purify the material liquid, and carrying out fine adjustment on the purification strategy according to the detection result; and 7, producing according to all the production conditions determined in the steps 1-6. After purification by the method, a concentrated solution of the object component can be acquired, and the product with required purity is obtained.

Description

technical field [0001] The invention relates to the technical field of separation and purification, in particular to a method for extracting, concentrating and rectifying to purify surface active substances. Background technique [0002] The principle of foam separation technology is to allow substances in the solution that can be combined with surfactants through physical and chemical forces or substances with surface activity in the solution to be adsorbed during the bubbling process and enriched in the bubbling process. The surface of the bubbles can achieve the purpose of enriching and extracting the substances to be separated. The essence of its separation is the difference in surface activity of various components in the solution. During the foam separation process, the gas distributor generates bubbles in the liquid phase, and the separated surface active components are adsorbed on the gas-liquid two-phase interface of the bubbles. After the adsorption is completed,...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing foam separation method can only extract, recycle and concentrate the surface active substances but cannot purify the target components in a real sense, and provides a foam distillation purification method to realize surface active substances. Active substances are extracted, concentrated and purified by rectification to obtain high-purity target components

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