520. ------. [DREYFUS, H.] [Catalytic Materials.] French Patent 691,210, Mar. 5, 1930. Chem. Abs., vol. 25, 1931, p. 1045.

Patent Abstracts

Catalytic materials, which are exhausted or poisoned in gas reactions such as the synthesis of MeOH, are reactivated or regenerated by submitting them to the action of gases which in H₂ at temperatures not appreciably above those used in the catalyst operation.

See also British Patent 334,251 (abs. 74) and

United States Patent 1,999,388 (abs. 169).