The purification of technical naphthalene by stepped static crystallization method in cracked aromatic fraction, which is rich of naphthalene has been developed.
以富含萘的裂解芳烃馏分为原料，开发静态分步结晶法从芳烃馏分中提纯工业萘。
2
Fractional crystallization and assimilation constrain lithological composition and fraction, and play a key role in the formation of intrusive complex.