How to handle salt solutions containing sodium phenolate? ?
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Dear sea friends: In the course of promoting our projects, our company has produced NaCl solutions containing sodium phenolate. The approximate composition is 15% wt of NaCl and 2.5% of sodium phenolate. Each batch of this solution weighs 2800 kg, and one batch is produced every 10 hours. The goal of processing is to generate as little solid waste and wastewater as possible. We would appreciate suggestions from those in the industry, and manufacturers with experience in this area are also welcome to cooperate: handshake:handshake
Sulfuric acid is added to adjust the pH, thereby displacing phenol; salts are then added to cause phase separation, allowing phenol to be separated. The salt solution layer is used to remove COD, while the phenol layer is distilled to recover phenol.
This post was last edited by n123 on 2015-8-25 09:15. It seems quite complicated; is it economically viable?
Or could you explain it in detail? ? :handshake
It’s economically viable. . The investment is not high, and the volume of material you handle is relatively small; one batch per day is sufficient. Use a salting-out tank with a capacity of around 10 cubic meters, as well as a tank for measuring sulfuric acid, a tank for measuring liquid alkali. After separation, there should be a tank for receiving phenol and another tank for receiving the salt solution, along with corresponding pumps. The amount of wastewater is small, so it can be transported to another location for centralized treatment
I agree with the process route mentioned above. The main components in the wastewater collected at the end are sodium chloride and sodium sulfate; solid-liquid separation is achieved through evaporation, concentration, and crystallization (of course, if these substances are to be converted into sodium chloride and sodium sulfate products respectively, the process becomes more complex). The secondary steam can be condensed and reused in production (whether further treatment of the water quality is necessary depends on the requirements of the process)
Thank you for your reply. If salt or acid is used instead of sulfuric acid, the only product will be NaCl – would that result in a better outcome?
Thank you. What is the function of the alkali solution metering tank? Does adjusting the pH value have other effects as well? ~~
It’s just that too much sulfuric acid was used; it serves to adjust the pH
Do you have a mature approach for handling this now? We are currently using complexation extraction to treat phenolic resin wastewater, and this process also produces sodium phenolate solution; we’re not sure how to deal with it. Please advise, thank you
I’m sorry, I haven’t been on the forum recently; I just saw the message now. Try resin adsorption; although it has its drawbacks, it is a relatively good method at the moment. I hope you can find a better way to handle this