How to reduce the phenol content in industrial naphthalene
Thread Content
In the tar refining process at our plant, the phenol content in the industrial naphthalene remains high, which causes the naphthalene to turn red in color. How can proper control be exercised throughout the distillation process to reduce the phenol content in industrial naphthalene, thereby achieving the best quality for the product?
The key is washing; it’s essential to keep the phenol content below 0.5. Generally, there will be no problems
The content of washed phenol is kept below 0.5%; thereafter, the bottom temperature of the initial distillation tower and the volume of hot oil circulation are increased appropriately, while ensuring that the temperature of the feed heat exchanger remains above 200 degrees. In the class, the yield of phenol oil from stockpiling is over 6% (based on the amount processed after washing).
The third stage implies producing more defoamed oil, with as much phenol as possible being removed. As a result, the defoamed oil will contain high levels of naphthalene; I’m not sure what level your facility aims to maintain – Hongte requires it to be below 5%
Personally, I recommend adding a mixer during the washing process; this will allow the phenol and alkali in the mixture to react completely, thereby increasing the time for static separation, which should lead to improved results! ! !