Synthesis of diphenylmethane using phosphoric-sulfuric acid catalyst
AssigneeUop LLC
InventorMichael Martan
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Abstract
Diphenylmethane may be synthesized in relatively higher yields than has hereinbefore been obtained by reacting dibenzyl ether with benzene in the presence of protonic acid catalysts which contain a phosphoric acid.
Claims5
A process for the preparation of diphenylmethane which comprises reacting dibenzyl ether with benzene at a temperature of from about 50.degree. to about 250.degree. C. and a pressure of from about atmospheric to about 100 atmospheres in the presence of a catalytic amount of a phosphoric acid selected from the group consisting of polyphosphoric, metaphosphoric, orthophosphoric, pyrophosphoric and hypophosphoric acids, said phosphoric acid catalyst admixed with sulfuric acid.
Dependencies are inferred from the claim text.