Problem with discharging clumped solids
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There is an intermediate with a melting point of 120 degrees; during actual experimentation, it appears in an oily state after solvent removal, and forms large solid masses upon cooling. It is not suitable for use in the next processing step once placed in containers. I was wondering if there are any good methods to make the intermediate after discharge in powder form. The intermediate is desolvated from toluene, and toluene is not required in the next step.
Why pack it in barrels? In industry, insulation for direct pipelines is surely applied and that’s it.
The melting point is 120 degrees, so high temperature maintenance is required; once the temperature drops below that level, it turns into a solid, and it’s difficult to remove it from the tank
It should be possible to reprocess the solid into powder
What method do you use for desolventization, such as drying? You can find ways to handle this during the desolventization process
It’s not very practical; after putting it in a barrel, one has to break the barrel to get the product out. That’s what makes this process cumbersome and troublesome.
It’s vacuum desolvation – the toluene is removed completely and then bubbling is carried out.
In the polyester industry, there is a process of granulation, where the melt is extruded into many long strips, and then these strips are cut into pieces or granules using scrapers or similar tools!
It doesn’t seem that complicated; guidance from a master who has worked with powdered chemicals in a factory is needed.
Here’s a simple tip for you: first test the solubility of your intermediate in inexpensive solvents with low boiling points such as methanol, and choose a solvent with low solubility, like methanol. After removing toluene, the solution is poured into methanol with rapid stirring while still hot, then cooled by reflux. After filtration and drying, a powder is obtained with a good color, which is equivalent to recrystallization. You can ask me about any details related to processes and engineering.
Thank you! The mixing requirements must be high here, especially during the later stage when a large amount of crystals precipitate – should a frame-type mixer be used? Is this a commonly used method in industry?