Q Oil washing and naphthalene
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One question has been bothering me: in the oil washing and benzene removal process, the oil being washed comes into contact with gas in the benzene washing tower, and as a result naphthalene is inevitably absorbed along with the crude benzene. During benzene removal, where does the naphthalene go? Surely such large amounts of naphthalene won’t affect the properties of the washed oil
Most of the naphthalene in the washing oil ends up in benzene after passing through the debenzene tower; an excess of naphthalene causes the tar to age
Most of the naphthalene in the washing oil ends up back in the washing oil after passing through the debenzing tower; an excess of naphthalene reduces the efficiency of tar absorption, and some naphthalene is also present in the waste sludge from the washing oil.