Method for preparing polycyclic aromatic hydrocarbons

Details Method for preparing polycyclic aromatic hydrocarbons Method for preparing polycyclic aromatic hydrocarbons

1979-10-18

1981-03-03

O'Keefe, Veronica

Chemistry of hydrocarbon compounds

Plural serial diverse syntheses

To produce aromatic

585406, 585422, 585428, C07C 220, C07C 1512

Patent

active

042542928

ABSTRACT:
A method for preparing polycyclic aromatic hydrocarbons with excellent yield and selectivity but without the formation of cyclic dimers and other undesirable by-products. In the method of the present invention, styrene, .alpha.-methylstyrene, .beta.-methylstyrene and/or vinyltoluene is dimerized and/or codimerized to produce unsaturated dimer and/or codimer in the first step reaction and said unsaturated dimer and/or codimer is caused to react with an aromatic hydrocarbon or hydrocarbons in the second step reaction, and both the first and second step reactions are carried out in the presence of a catalyst which is represented by the general formula: RCF.sub.2 SO.sub.3 H, in which the symbol R is Cl, F or C.sub.n F.sub.p CL.sub.2n+1-p, wherein n is an integer from 1 to 3 and p is also an integer from 1 to 2n+1.

REFERENCES:
patent: 2249987 (1941-07-01), Stanley et al.
patent: 2519577 (1950-08-01), Ipatieff et al.
patent: 3272879 (1966-09-01), Stahly

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