Union Carbide Corporation

Arthur W Francis

Gregorio Tarancon

Mark S Nowotarski

Jack Solomon

Lawrence S Graczyk

Robert E Franklin

A method to deliver ultra high purity helium gas to a use point without need for further pressurization of helium gas after it is warmed or vaporized, wherein gaseous helium, having a purity which can be less than that of the product, is passed in heat exchange relation with cold helium to warm or vaporize and thus pressurize the helium while simultaneously being cleaned of impurities, and the resulting helium gas from both sources is delivered as ultra high purity helium gas to the use point.

Method to deliver ultra high purity helium gas to a use point

This invention relates to a process for substantially reducing the backmixing or backflow of gases into metal heat treating furnaces by the use of a particular gas jet and a defined flow rate.

Process for reducing backmixing

A process for the production of silane in a reaction vessel comprising (i) a single closed chamber, (ii) a hollow tube open at both ends, said tube being disposed in the lower portion of the chamber; and (iii) means for circulating liquid in the lower portion of the chamber in such a manner that the liquid flows in a downward direction through the tube and in an upward direction outside of the tube Comprising the following steps:

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New City, NY, United States of America

Arthur W Francis