E.i. Dupont De Nemours and Company

Paul Douglas VerNooy

John Byrne Michel

This invention relates to a process for the conversion of nitrous oxide (N O) to nitrogen and oxygen using a supported catalyst comprising iron and, optionally, certain other metals and to a novel catalyst composition.

Process for the decomposition of nitrous oxide

A process is disclosed for producing calcium fluoride comprising: (a) mixing aqueous H,PO,with aqueous H,SiF,to form a mixture such that the concentration of H,PO,is at least about 3 moles/liter, (b) adding phosphate rock to the mixture at a rate such that the pH of the mixture is maintained at less than about 1.0 and at a temperature sufficient to form a second mixture containing calcium fluoride, and (c) separating calcium fluoride from the second mixture.

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Media, PA, United States of America

Paul Douglas VerNooy