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Europeenne De Retraitement De Catalyseurs Eurecat

Institut Francais Du Petrole and Europeene De Retraitment De Catalyseurs

Raymond Roumieu

Philippe Courty

Charles Cameron

Jean-Paul Boitiaux

Georges Berrebi

Hans Rabehasaina

Francois Eschard

A solid mass for the recovery of mercury, comprising a solid mineral support or dispersant, essentially copper and sulphur at least partly in the form of copper sulfide is produced by the following stages:

Method of preparing a solid mass for mercury recovery

The invention relates to a pretreatment of a petrochemical or refining catalyst containing at least one metal in metallic or metallic oxide form, deposited on a support. The catalyst is impreganted by a solution or a suspension containing on the one hand a specific sulphur agent, e.g., diethanol disulfide and on the other an organic reducing agent, e.g., formic acid.

Process for the pretreatment of a catalyst by a mixture of a sulphur

The invention relates to an apparatus for purifying lithium, formed by a sealed enclosure comprising a heated upper portion 1 provided with a container 9 in which the molten lithium 11 is agitated and from which the impurities evaporate, and a cooled lower portion 13 provided with a condensation surface 17 and a pipe means 16 for producing a depression in the lower portion. The invention is used in the purification of lithium, and in particular, for separation of lithium from sodium and potassium impurities.

Apparatus for purifying lithium

The invention relates to a process for purifying lithium in which the lithium is melted in an inert atmosphere. The molten lithium is then maintained at a temperature of 400.degree. to 700.degree. C. under a pressure of less than 10 Pascal while agitating the molten lithium to renew its exposed surface. In this manner, impurities in the lithium are virtually exclusively vaporized, without giving rise to substantial evaporation of lithium. The vaporized impurities are then condensed at a temperature of less than 100.degree. C. and the purified lithium is recovered in molten form.

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Valence, France

Raymond Roumieu