Problem of catalyst replacement in the aromatic extraction clay column
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The replacement of the clay in the white clay column used for aromatic extraction has always been the most time-consuming task in the plant; whenever it’s time to replace the clay, everyone has to get involved. Are there any good practices or new technologies that could help address this issue?
The extraction unit I have in use has been operational for ten years; by optimizing its operation, neither the liquid-liquid extraction nor the distillation extraction systems has required any replacement of the alumina filler. Yet the product quality remains that of high-quality benzene-545, with a melting point of 5.55, and no corrosion has occurred. The heat source for the reboiler can be changed from medium-pressure steam to low-pressure steam, thereby saving energy and reducing consumption.
The extraction unit I have in use has been operational for ten years; by optimizing its operation, neither the liquid-liquid extraction nor the distillation extraction systems has required any replacement of the alumina filler. Yet the product quality remains that of high-quality benzene-545, with a melting point of 5.55, and no corrosion has occurred. The heat source for the reboiler can be changed from medium-pressure steam to low-pressure steam, thereby saving energy and reducing consumption.
Impossible, right? Haven’t you replaced the clay in your white clay pots in ten years? According to the design, the white clay needs to be replaced every six months. Could you explain how you optimize the operations?
Which factory has liquid-phase hydrogenation now?