Preparation of nitrogen trifluoride
AssigneeAir Products and Chemicals, Inc.
InventorsAndrew Joseph Woytek, John Theodore Lileck
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Abstract
Nitrogen trifluoride is prepared by passing elemental fluorine in intimate contact with liquid phase ammonium acid fluoride maintained at a temperature above its melting point but below about 400.degree. F for a time sufficient to effect reaction. Generally, ammonia is injected into the ammonium acid fluoride along with the fluorine to maintain a molar ratio of by-product hydrogen fluoride to ammonia of approximately 2.0 to 2.5.
Claims8
A process for preparing nitrogen trifluoride which comprises the step of contacting elemental fluorine in vapor phase with liquid phase ammonium acid fluoride maintained at a temperature of from about the melting temperature to a temperature not substantially above 400.degree. F for a time sufficient to effect reaction and thereby form nitrogen trifluoride.
The process of claim 5 wherein ammonia is injected into the ammonium acid fluoride in a proportion sufficient to maintain a mole ratio of hydrogen fluoride to ammonia of about 2:0 to 2:5.
Dependencies are inferred from the claim text.