Petrochemical cyclic hydrocarbons

The most important group of unsaturated cyclic hydrocarbons is the aromatics, which occur in coal tar. All the aromatics sometimes exhibit unsaturation, that is, the addition of other substances, and their principle reactions bring about the replacement of hydrogen atoms by other kinds of atoms or groups of atoms. The aromatic hydrocarbons include benzene, toluene, anthracene, and naphthalene. Aromatics are utilized primarily in the petrochemical industries. 

Y.C. Jang and H.K. Sung, Method for preparing a homo-and co-poly-mers by polymerization of cyclic olefin compounds using fluorine-containing aromatic hydrocarbon compound as catalyst activator, US Patent 6998450, assigned to Korea Kumho Petrochemical Co., Ltd. (Seoul, KR), February 14,2006. 

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