Method for producing diarylmethanes

Details Method for producing diarylmethanes Method for producing diarylmethanes

1990-11-13

1991-11-26

Garvin, Patrick P.

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

By condensation of entire cyclic molecules or entire...

585428, 585429, C07C 202

Patent

active

050684817

ABSTRACT:
The present invention relates to a method for producing diarylmethanes represented by the following formula (III) ##STR1## wherein R.sup.1 and R.sup.3 each stand for a hydrogen atom or an alkyl group having 1 to 3 carbon atoms. This method comprises the reaction of a benzyl chloride represented by the following general formula (I) with benzene or an alkylbenzene represented by the following general formula (II): ##STR2## wherein R.sup.1 to R.sup.3 have the same meanings as defined above and is characterized in that the catalyst used is an HY or HL type zeolite having a SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of 4-10 and an alkali metal content of 5% by weight or less, calculated as an alkali metal oxide, or a zeolite obtained by the exchange of said HY or HL type zeolite with cations of a di- or tri-valent metal.

REFERENCES:
patent: 2850545 (1958-09-01), Fetterly et al.
patent: 3109868 (1963-11-01), Fields et al.
patent: 3799991 (1974-03-01), Smith

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