Citric acid is a kind of organic acid. Solvent extraction is a common method for extracting citric acid. The solvent extraction process is greatly affected by the fermentation raw materials. When pure substances such as glucose are used as raw materials, the fermentation liquid contains fewer impurities, and citric acid can be directly extracted at one time by solvent extraction. In order to effectively separate citric acid, the extraction and stripping processes use a continuous multi-stage countercurrent process to ensure better contact between the organic phase and the aqueous phase. Multi-stage extraction can achieve an extraction yield of 90%.
The solvent extraction method is used for the extraction of citric acid because it saves a lot of chemical raw materials, reduces energy consumption, does not produce a lot of waste residue during the extraction process, is beneficial to environmental protection, and has the advantages of large processing capacity, good separation effect, high recovery rate, and continuous operation. In addition, the extractant can be used repeatedly, which also reduces production costs.
Citric Acid Extraction Process
In the extraction process of citric acid, first, after the raw materials are fermented, the fermentation liquid and the selected extractant are injected into the centrifugal extractor through different inlets according to a certain ratio. Through the centrifugal force of the equipment, the fermentation liquid and the extractant are quickly mixed and transferred.
After the mixed liquid is subjected to centrifugal force, the light and heavy phases of the liquid are discharged from the body through different outlets to complete the extraction process. The loaded organic phase after extraction is separated from the citric acid and the extractant through the stripping, and the extractant is recycled and reused.
Citric Acid Extraction Equipment
CWL-M centrifugal extractor is a commonly used equipment for organic acid extraction equipment, and is widely used in the extraction of organic acids, such as lactic acid extraction, citric acid extraction, etc. CWL-M centrifugal extractor is a new, efficient and energy-saving liquid-liquid extraction and separation equipment independently developed and produced by Zhengzhou Tiei Extraction Company. It can not only be used for the extraction of citric acid, but also for extraction operations in the fields of chemical industry, hydrometallurgy, environmental protection, pharmaceuticals, etc.
Our customer purchased a centrifugal extractor production line for the extraction of citric acid. According to the customer's needs, we first conducted a small-scale test for the customer and carried out experimental operations in our experimental center. The data obtained met the customer's production requirements. Through experimental process amplification, we provided the customer with an industrial production line. Currently, the production line is running stably. The customer has expanded production and added two new production lines. Currently, the equipment is running stably.
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