PATENTS

      65.       ------.  [AUDIBERT, E.]  Methanol.  British Patent 271,538, Jan. 30, 1926.  Chem. Abs., vol. 22, 1928, p. 1596.

CO and H₂ are passed under pressure and at an elevated temperature, suitably 100 atm. And not over 450° at any point in the reaction zone, over a Cu catalyst.  To prepare the catalyst, a solution of Cu nitrate or an organic Cu salt is treated with alkali, the precipitate washed and dried in vacuo, mixed with a small proportion of violet-colored Cu. And then reduced at a temperature not exceeding 200° with H₂ or CO under ordinary pressure with or without diluent gas such as N₂ or CH₄.  The temperature of the CO and H₂ supplied to form MeOH does not exceed 180° before the reaction.

Auerhahn, a. See abs. 605.