Organic acid refers to some organic compounds with acidity. The most common organic acid is carboxylic acid, whose acidity originates from carboxyl (-COOH). Sulfoacid (-SO3H), sulfinic acid (RSOOH) and thionothiolic acid (RCOSH) are €also organic acids. There are a lot of important basic chemical raw materials in organic acids, such as citric acid, diacid,™ lactic acid and itaconic acid.
With the increasing market competition, the national environmental αprotection policy continues to upgrade; the way to reduce production cost≈s, improve product quality, conserve energy and reduce emission↔s has become the most important thing for organic βacid production enterprises. The level of fermentation and the quality of raw materials are impro¥ved, while the active optimization of the extraction process has become the main means to improve σthe competitiveness of organic acid manufacturers.
At present, there are the following new techn↓ologies of organic acids:
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Ceramic membrane is used to replace the traditional filtration methods t♦o clarify the fermentation liquor, improve the quality of filtra♦te and reduce the resin pollution and solvent dosage and solvent volume in the later process
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Application of membranes for removal of small molecularα impurities can enhance the quality of products to a new level
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Continuous moving beds are used to replace the fixed beds and im♥prove the stability of desalination and product yield; save resin dosage an∏d reduce unit consumption
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The application of continuous chromatography separation technology can extract organ•ic acids to change the whole extraction process
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