Patents by Inventor Pierre Spiteri

Pierre Spiteri has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for stabilizing a mixture of molten alkali metal nitrates and alkali metal nitrites usable particularly as a heat transfer fluid and stabilized mixture thus obtained
    Patent number: 4559993
    Abstract: The present invention relates to a process for stabilizing a mixture of molten alkali metal nitrates and alkali metal nitrites usable particularly as a heat transfer fluid and to the stabilized mixture thus obtained.The process comprises adding to the mixture a quantity of alkali metal hydroxide such that the value of the logarithm of the ratio P(H.sub.2 O)/.vertline.OH.sup.- .vertline..sup.2 (where P(H.sub.2 O) denotes the partial pressure of water vapor expressed in atmospheres and .vertline.OH.sup.- .vertline. the hydroxide ion concentration expressed in moles/kg) is between a value b corresponding to the disproportionation of the nitrites into nitrate and nitric oxide and a value a corresponding to the appearance of peroxides, the values a and b being determined for a given nitrate/nitrite ratio, a given temperature and given partial pressures of the gases blanketing the mixture.
    Type: Grant
    Filed: September 26, 1983
    Date of Patent: December 24, 1985
    Assignee: Electricite de France
    Inventors: Gerard Picard, Thierry Flament, Bernard Tremillon, Pierre Saint-Paul, Pierre Spiteri