| 摘要 |
Ammonia is prepared by passing hydrogen and nitrogen over a catalyst containing at least one metal from the iron group and at least one of the metals magnesium and vanadium at a temperature not greater than 450 DEG C. The Specification as open to inspection under Sect. 91 comprises also the combination with the metal from the iron group of at least one metal capable of forming a nitride at the temperature of reaction. This subject-matter does not appear in the Specification as accepted. Reference has been directed by the Comptroller to Specification 609,756. |
