How to remove a small amount of ammonium chloride from chlorobenzene solution? ~~
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Friends. In our company, during the production process, a solid-liquid suspension of chlorobenzene and NH4Cl is generated; the total amount per batch is around 2500 kg, with a solid content of approximately 40–90 kg. The particle size is around 70 mesh. The filtrate is sent to the subsequent system for collection and use, while the solids are either treated as hazardous waste or purified for further use. We are struggling to decide which filtration equipment would be the most suitable. . . 1. Install a pipeline filter and use pressure filtration or suction filtration for treatment, but the filter needs to be disassembled and reassembled after each batch, which is troublesome and requires a lot of labor. 2. Use a centrifuge lined with PE or PTFE, but is this appropriate given the large volume of liquid? 3. Plate and frame filter press; 4. Nh4Cl for purification – the cost seems a bit high. . . What should I do? Please share some valuable suggestions and opinions~~
Membrane filtration can be used; the liquid obtained after filtration contains no suspended solids
A solid mass of 40kg to 90kg can definitely be connected to a centrifuge via pipes! Material can be discharged at most twice; the filtrate is removed directly
Is the cost of membrane filtration very high?~~~
Thank you, this is an option; I hope we can find a better solution :)
It’s not too bad; ceramic membranes can be used for filtration, and the SS level in the filtered liquid is basically 0. As for the cost, it won’t be very high given a processing capacity of 2.5 tons per batch. Of course, the operating costs are higher compared to ordinary centrifuges, but they shouldn’t differ much from those of high-speed centrifuges
Equipped with a vacuum filtration centrifuge for automatic solid discharge. The liquid system is fully sealed, resulting in minimal losses