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Method for extracting citric acidby employingcentrifugal extractor

A centrifugal extractor and citric acid technology, applied in separation methods, solvent extraction, countercurrent extraction, etc., can solve the problems of low extraction rate and easy corrosion of containers, and achieve the effect of improving the mixing effect

Active Publication Date: 2017-08-18
ZHENGZHOU TIANYI EXTRACTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the purpose of the present invention is to address the deficiencies in the prior art and provide a method for extracting citric acid using a centrifugal extractor, which solves the problems that the extraction rate is low and the container is easily corroded when the existing solvent extraction method extracts citric acid , and at the same time achieve the effect of improving the extraction rate and reducing the corrosion of the container

Method used

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  • Method for extracting citric acidby employingcentrifugal extractor
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  • Method for extracting citric acidby employingcentrifugal extractor

Examples

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Embodiment 1

[0058] A method for extracting citric acid using a centrifugal extractor, comprising the following steps:

[0059] (1) Extraction section: using amines as extraction agents, put the citric acid fermentation broth into a centrifugal extractor to extract citric acid; the volume ratio of amine to crude citric acid is 1:1; the temperature is 35°C; 5-stage countercurrent extraction ; The amines are trilaurylamine: secondary amine: sulfonated kerosene, its volume ratio, trilaurylamine: secondary amine: sulfonated kerosene=2:2:6;

[0060] (2) Washing section: the organic phase containing citric acid in step (1) is placed in a centrifugal extractor for washing, the volume ratio of the organic phase to water is 10:1; the temperature is 35°C; 2-stage countercurrent extraction;

[0061] (3) stripping section: the organic phase gained in the step (2) is placed in a centrifugal extractor for stripping with water, and the organic phase is collected as a citric acid phase; the volume ratio o...

Embodiment 2

[0066] A method for extracting citric acid using a centrifugal extractor, comprising the following steps:

[0067] (1) Extraction section: using amines as extraction agents, put the citric acid fermentation broth into a centrifugal extractor to extract citric acid; the volume ratio of amine to crude citric acid is 5:1; the temperature is 30°C; 5-stage countercurrent extraction ; The amines are trilaurylamine: secondary amine: sulfonated kerosene, its volume ratio, trilaurylamine: secondary amine: sulfonated kerosene=2:2:6;

[0068] (2) Washing section: the organic phase containing citric acid in step (1) is placed in a centrifugal extractor for washing, the volume ratio of the organic phase to water is 25:1; the temperature is 30°C; 2-stage countercurrent extraction;

[0069] (3) stripping section: the organic phase gained in the step (2) is placed in a centrifugal extractor for stripping with water, and the organic phase is collected as a citric acid phase; the volume ratio o...

Embodiment 3

[0072] A method for extracting citric acid using a centrifugal extractor, comprising the following steps:

[0073] (1) Extraction section: using amines as extraction agents, put the citric acid fermentation broth into a centrifugal extractor to extract citric acid; the volume ratio of amine to crude citric acid is 6:1; the temperature is 33°C; 5-stage countercurrent extraction ; The amines are trilaurylamine: secondary amine: sulfonated kerosene, its volume ratio, trilaurylamine: secondary amine: sulfonated kerosene=2:2:6;

[0074] (2) Washing section: the organic phase containing citric acid in step (1) is placed in a centrifugal extractor for washing, the volume ratio of the organic phase to water is 30:1; the temperature is 33°C; 2-stage countercurrent extraction;

[0075] (3) stripping section: the organic phase gained in the step (2) is placed in a centrifugal extractor for stripping with water, and the organic phase is collected as a citric acid phase; the volume ratio o...

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Abstract

The invention discloses a method for extracting citric acidby employinga centrifugal extractor. The centrifugal extractor comprises an extraction section, a washing section and a re-extraction section. After the efficient centrifugal extractor is applied to the extraction method of citric acid, the two-phase separation efficiency is obviously improved, and meanwhile emulsion phenomenon in the traditional technology is obviously improved; in addition, in the technical condition, wastes are hardly produced in the re-extraction section; the equipment is small in floor space, and the stage efficiency is further obviously improved; as the novel and efficient centrifugal extractor adopts totally sealed equipment, the sharp flavor of an extraction agenthardly exists in an operation site, the operating environment is greatly improved, and the health hazard of operating personnel during production is eliminated.

Description

technical field [0001] The invention relates to a method for extracting citric acid, in particular to a method for extracting citric acid using a centrifugal extractor. Background technique [0002] Citric acid (also known as citric acid, the chemical formula is C 6 h 8 o 7 ) is one of the most important products in the production of organic acids by fermentation, which is widely used in industries such as food, chemical industry, medicine, and environmental protection. It occupies a very important position in the production of the national economy. Although my country's citric acid industry has developed rapidly and is at the leading level in the world in terms of fermentation technology, especially in terms of fermentation strains and production technology, the downstream extraction technology is relatively backward, which seriously restricts the further development of the industry. The composition of citric acid fermentation broth is relatively complex. In addition to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D11/04C07C51/48C07C59/265
CPCB01D11/04B01D11/0434B01D11/0492B01D2011/002C07C51/48C07C59/265
Inventor 王利军
Owner ZHENGZHOU TIANYI EXTRACTION TECH
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