L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des

L'air Liquide

Frederic Castellanet

Daniel Gary

Philippe Fraysse

Rene Lardeau

Pierre Briend

Jean-Claude Boissin

Plant for supplying helium to a plurality of production lines, comprising a helium source of at least 7000 liters; a network of secondary ducts, feeding production lines using helium gas; and a main duct for conveying helium, connected upstream to the helium source and downstream to the network of secondary ducts. Such a plant is useful in a filling operation for diving gas cylinders, dirigible airship gas bags or safety airbag inflation containers, for quenching metal articles, or for fabricating electronic products or optical fibers.

Plant and process for supplying helium to a plurality of production lines

Process and apparatus for the purification of a cryogenic fluid in liquid, diphase, gaseous or supercritical state, having boiling point Pe, with at least one of its impurities having a boiling point Pe', with Pe'&gt;Pe. The process includes at least one step selected from the group comprised by:

Process for the purification of a cryogenic fluid by filtration and/or

In order to deliver ultrapure helium to a utilization line (1), helium is withdrawn, in liquid or supercritical form, from a storage tank (3), it is filtered in this liquid or supercritical form (at 4), the filtered helium is vaporized and the resulting helium gas is sent to the utilization line (1). The process is applicable to the cooling of integrated-circuit wafers.

Process and installation for delivering ultra-pure helium

Process and apparatus for the purification of a cryogenic fluid in liquid, diphase, gaseous or supercritical state, having a boiling point Pe, with at least one of its impurities having a boiling point Pe', with Pe'&gt;Pe. The process includes at least one step selected from the group comprised by:

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Le Pecq, France

Frederic Castellanet