PATENTS

1734.         1734.  ------.  [INTERNATIONAL HYDROGENATION PATENTS CO., LTD.]  Regeneration of Catalysts.  French Patent 854,439, Apr. 15, 1940: appl. filed May 8, 1939.  Chem. Zentralb., 1940, II. P. 1817.

Catalyst that have been used for cracking, hydrogenation, and reduction of CO are regenerated by oxidation with O₂-poor gases.  Regeneration is begun with a O₂ content in the gas of 2-6%, which is gradually raised to about 20%.