The commonly used method for extracting p-hydroxybenzoic acid is solvent extraction, which is also an extraction process with relatively high extraction efficiency. P-hydroxybenzoic acid is a very important organic synthesis raw material with a wide range of applications. Therefore, companies attach great importance to its extraction, including the selection of extraction equipment.
The complex extraction method is highly efficient and selective in separating dilute solutions of polar organic matter, can treat high-concentration organic wastewater, has a simple and feasible process, and has low cost. The complex extraction method recovers phenol and p-hydroxybenzoic acid from p-hydroxybenzonitrile alkaline wastewater, and then uses KOH solution for back extraction, and the phenol and p-hydroxybenzoic acid obtained by back extraction are returned to the production process. This treatment process can not only recycle the raw materials and products in the wastewater, but also has good economic and environmental benefits.
The solvent extraction method is to select a suitable extractant, inject the feed liquid and the extractant into the extraction equipment according to a certain ratio, then mix and transfer the mass, and complete the extraction and separation. Regarding the selection of extraction equipment, there are many equipment on the market, and the common ones are centrifugal extractors, mixer settler, extraction column, reactors, etc.
P-hydroxybenzoic Acid Extraction Equipment
The CWL-M centrifugal extractor developed and produced by Zhengzhou Tiei Extraction is a new and efficient liquid-liquid extraction and separation equipment that can be used for extraction, separation, stripping, washing and other operations in multiple fields. Compared with other traditional extraction equipment, the centrifugal extractor has an essential difference in working principle.
The centrifugal extractor is chosen because of its irreplaceable performance advantages, especially the difference in working principles, which makes the extraction efficient and effective.
- The centrifugal extractor relies on centrifugal force to mix and separate two phase liquids, with fast mixing and mass transfer speed and high extraction efficiency.
- The centrifugal extractor is suitable for liquid extraction of various systems and can meet the different production needs of customers.
- The equipment material can be customized, and the corrosion-resistant material can resist strong acid corrosion.
- The centrifugal extractor has a very large processing capacity, and the extraction effect is very good, with low power consumption and comprehensive cost savings.
Choose the centrifugal extractor, select a suitable extractant, adjust the pH value of the liquid, set the mixing time, and control all these factors that affect the extraction efficiency. The final extraction rate of p-hydroxybenzoic acid can reach more than 95%, with excellent results.
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