PATENTS

2829. -----  [ROMAN, L. H.]  Formaldehyde From Gas Containing Hydrogen and Carbon Monoxide.  British Patent 371,377, Oct. 14, 1930.  British Chem. Abs., 1932, B, p. 763.

            Gas is passed at atmospheric pressure and 130°-200°  over a catalyst comprising Ni, Fe, Co, Cu, Pt, or Pd, or oxides of these, the catalyst being regenerated by substituting a stream of N₂ or N oxides;  the gas flows for 80-100 sec. and the regenerating stream 25-35 sec. in alternation.