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. 12, 1983
Filed:
Jun. 30, 1980
Robert J Radel, Florence, AL (US);
Jack M Sullivan, Florence, AL (US);
Tennessee Valley Authority, Muscle Shoals, AL (US);
Abstract
A process for the preparation of nitrogen fertilizers, especially oxamide, either indirectly, or directly from oxalate esters, including the regeneration of the quinone oxidant utilized in the formation of the above esters. Preparation of oxalate esters as potential intermediates for nitrogen fertilizers by the oxidative carbonylation of alcohols with carbon monoxide in the presence of a catalytic amount of a platinum group metal salt with or without a corresponding metal oxidant salt and an optionally substituted quinone (substituted or unsubstituted 2,5-cyclohexadiene-1,4-dione). High yields of isolated dialkyl oxalates are obtained by regulating temperature and carbon monoxide pressure and by maintaining essentially anhydrous conditions. In addition, high yields of the hydroquinones (1,4-dihydroxybenzenes) are recovered.