Superstoichiometric carbon monofluoride and methods for preparing stable carbon monofluorides of various stoichiometries

Abstract

Abstract STABLE CARBON MONOFLUORIDE HAVING A MAXIMUM SUPERSTOICHIOMETRIC FLUORING-TO-CARBON RATION AND CONTROLLED, REPRODUCIBLE METHODS FOR PREPARING STABLE CARBON MONOFLUORIDES INCLUDING CARBON MONOFLUORIDE FILMS ON VARIOUS SHAPES OF SOLID CARBON, BOTH AT ATMOSPHERIC PRESSURE AND AT SUPERATMOSPHERIC PRESSURES. THE PRIOR METHOD OR PREPARING CARBON MONOFLUORIDES AT ATMOSPHERIC PRESSURE BY REACTING FLUORINE AND GRAPHITE AT A TEMPERATURE IN THE RANGE FROM ABOUT 400* C, TO ABOUT 600* C, IS MADE REPRODUCIBLE BY CONTROLLING THE REACTION TEMPERATURE SO THAT IT DOES NOT VARY MORE THAN +3* C. STABLE SUPERSTOICHIOMETRIC CARBON MONOFLUORIDES CAN BE PREPARED AT ATMOSPHERIC PRESSURE BY REACTING CARBON AND FLUORINE AT A TEMPERATURE IN THE RANGE FROM ABOUT 620* C, TO ABOUT 635* C, AND MAINTAINING THE TEMPERATURE FOR SUCH A PERIOD OF TIME AS TO ALLOW THE REACTION TO GO SUBSTANTIALLY TO COMPLETION. APPROXIMATELY ONE TO THREE HOURS IS NEEDED AT TEMPERATURES IN THE RANGE TO FORM STABLE CARBON MONOFLUORIDE FILMS. AT TEMPERATURES BETWEEN ABOUT 624* C, AND ABOUT 630* C, A CARBON MONOFLUORIDE HAVING A MAXIMUM SUPERSTOICHIOMETRIC FLUORING-TO CARBON RATIO OF APPROXIMATELY 1.12/1.00 CAN BE PRODUCED. STABLE CARBON MONOFLUORIDES HAVING SUPERSTOCHIOMETRIC PROPORTIONS OF FLUORINE AND CARBON CAN ALSO BE PREPARED AT SUPERATMOSPHERIC PRESSURES, WITH THE ADDITION OF HEAT AT PRESSURES UP TO ABOUT 225 P.S.I.A. AND WITHOUT THE ADDITION OF HEAT AT PRESSURES BETWEEN ABOUT 225 P.S.I.S. AND ABOUT 250 P.S.I.A.

Inventors

• 👤 John L Margrave
• 👤 Ramachandra B Badachhape
• 👤 James L Wood
• 👤 Richard J Lagow

Bibliographic Details