Pleasant sour and refreshing "versatile" citric acid production process

　　Citric acid has a pleasant sour taste, refreshing to the mouth, no post-sour taste, safe and non-toxic, and is widely used as a sour agent for food and beverages. Not only that, citric acid can also form complexes with divalent or trivalent cations, and can be used as a chelating agent and detergent for metalworking (a washing power supplement that acts as a softening water). At the same time, citric acid can also be derived to form many derivatives, which can be used as raw materials for the organic chemical industry. "Versatile" citric acid is widely used in food and beverage, pharmaceutical and chemical industry, cleaning and cosmetics, organic materials and other fields.

　　China is a big producer of citric acid, with more than 20 production plants, and the output has exceeded 700,000 tons. At present, the extraction methods of citric acid are mainly calcium salt method, chromatography and extraction method. But in the end, it has its corresponding disadvantages:

　　1, calcium salt process: due to the intermittent operation of the neutralization process, the operating conditions are poor, the labor intensity of the workers is large, and the level of automation is low. This also leads to unstable quality of intermediates, consuming about 0.85 tons of sulfuric acid and 0.85mfe carbonic hooks per ton of citric acid, and excessive consumption of excipients leads to high costs for enterprises.

　　2, chromatography process: high investment in equipment and auxiliary facilities, and material pretreatment is more complex, large consumption, high cost.

　　3, extraction process: poor product quality, extractant residues lead to products can not be applied to the food and pharmaceutical industries.

　　In summary, how to improve the yield of citric acid, save excipients, and reduce calcium sulfate pollution of catalpa acid extraction method is the solution of the industry.

　　The Dramel Citric Acid Membrane Separation System replaces traditional adsorption precipitation, solvent, extraction, ion exchange, etc. Solve the traditional production process can not be continuous operation, high cost, the need for derivative pretreatment, labor intensity, not easy to scale up production and other defects. Each process section can operate continuously and stably with a high recovery rate, and the operating cost is only 1/10 of that of the traditional process.