| 摘要 |
Alkyl aromatic hydrocarbons are made by telomerizing ethylene on a "benzenoid" hydrocarbon at 50-80 DEG C. in the presence of a catalyst prepared by combining a non-aromatic tertiary amine with a compound of formula LiR in which R is alkyl, cycloalkyl, phenyl, alkylphenyl, phenylalkyl or alkenyl radical containing 1-30 C. Benzenoid is defined as a compound having at least one benzene nucleous which may be substituted and/or which may be fused to an alicyclic ring. Specified benzenoid hydrocarbons are xylenes, ethylbenzene, n-propylbenzene, i-propylbenzene, trimethylbenzenes, n-, sec.- and tert.-butylbenzenes, tetrahydronaphthalene and cyclohexylbenzene. If the starting aromatic contains a saturated hydrocarbon group having a hydrogen atom attached to the a -C atom, reaction will take place in the a -position by telomerization. If there are two a -hydrogens only one site is reactive in practice. When there is no a -hydrogen reaction occurs at the aromatic nucleus and growth therefrom ensues. Examples are given which describe the synthesis of C3-C17 alkyl aromatics.ALSO:A catalyst is prepared by combining a non-aromatic tertiary amine with a compound of formula NiR in which R is a hydrocarbon radical having 1-30 C selected from alkyl, cycloalkyl, phenyl, alkylphenyl or alkenyl radical. Additionally the catalyst may contain sodium alkyls. Preferred tertiary amines are triethylene diamine, 1:4-ethylenepiperidine, and tri-lower aliphatic amines. |
