What is the white solid found inside pyridine?
Thread Content
I’m seeking help from experts: A thick layer of white solid was found adhered to the inner wall of the outlet pipe at the bottom of the pyridine storage tank in our company. The original DN100 pipe was reduced in size to around DN25 as a result. When the pipe was rinsed with methanol, it turned out that the solid could be dissolved. What is this white solid? Note: Our pyridine is pumped into the workshop to react with chloromethane to produce MPC.
Does anyone know? Could you please let me know? Thank you! ! ! :hug::hug::hug:
It could be a salt of pyridine; due to long-term storage of pyridine, some acidic impurities may form salts with pyridine and accumulate at the bottom of the tank. Pyridinium salts are generally easily soluble in alcohol or water, so they can be removed by rinsing.
New findings show that this solid is also soluble in water... What on earth is it? The absence of bubbles when adding hydrochloric acid rules out the possibility of carbonates.