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Pyridine and methylpyridine are commonly recovered from coal coking byproducts, which are distributed in coke oven gas, crude benzene and tar. Generally, the boiling point of pyridine hydrate transferred from gas to ammonium sulfide mother liquor is very low, between 95-97℃. In the crude and light pyridine base recovered, 3-mercaptopropionic acid transportation and storage methods contain about 15%. Further distillation can obtain 3-mercaptopropionic acid transportation and storage methods. With the expansion of the use... more