The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 21, 1981
Filed:
Sep. 12, 1979
Howard B Irvin, Bartlesville, OK (US);
Phillips Petroleum Company, Bartlesville, OK (US);
Abstract
An olefinically unsaturated dinitrile of the formula ##STR1## wherein R and R' are alkylene or alkylidene radicals and Z is an alkyl radical which is converted to the corresponding saturated dinitrile in the presence of hydrogen, a palladium catalyst and at least one alkanol having 1 to 3 carbon atoms. The saturated dinitrile is then converted to the corresponding diamine in the presence of hydrogen, a secondary amine formation suppressant, a ruthenium catalyst and at least one diluent selected from the group consisting of tertiary alkanols having 4 to 12 carbon atoms, saturated hydrocarbons having 4 to 12 carbon atoms, and ethers having 4 to 12 carbon atoms. The at least one alkanol is substantially completely separated from the saturated dinitrile before the saturated dinitrile is converted to the corresponding diamine to avoid N-alkylation reactions which may occur if the at least one alkanol is present when the saturated dinitrile is converted to the corresponding diamine.