Process for reducing chloronitrobenzenes using ruthenium with a minor amount of platinum as the catalyst
AssigneeE. I. Du Pont de Nemours and Company
InventorJohn R. Kosak
Life of this patent
Estimating the term…
Abstract
A process for reducing chloronitrobenzenes to the corresponding chloroanilines using a combination ruthenium-platinum catalyst is disclosed. The ratio of ruthenium to platinum in the catalyst is from 75:1 to 30:1. The pressure used is from 200 to 800 psi with from 400 to 600 psi being the preferred range. The temperature used is from 70.degree. to 160.degree. C. with from 110.degree. to 150.degree. C. being the preferred range.
Claims11
A process of reducing chloronitrobenzenes to the corresponding chloroanilines comprising contacting said chloronitrobenzene with hydrogen without the addition of a dechlorination suppressor at from 70.degree. C. to 160.degree. C. and a pressure of from 200 to 800 psi in the presence of a catalytic amount of supported metallic ruthenium and supported metallic platinum wherein the weight ratio of ruthenium to platinum is from 75:1 to 30:1.
Dependencies are inferred from the claim text.