723.    ---------------.  [DOLGOV, B. N.]  [Methanol Synthesis.  II.]  Khim. Tverdogo Topliva, vol. 3, 1932, pp. 185-204; Chem. Abs., vol. 28, 1934, p. 5211.

     Synthesis was carried out in a steel bomb lined with Cu and having a Cu insert to hold the catalyst.  The process was effected at a cold pressure of 100-150 atm. and 350°-400°.  Pure Kahlbaum CO and H₂ were used containing H₂, 97.2; CH₄, 0.4; unsaturated compounds, 0.2; N₂, 2.6; and O₂, 0.3%.  Cu catalysts are not recommended, but good results were obtained with n chromates.  Among the best tricomponent catalysts were Cu₄₉Zn₄₃Cr₈ and Cu₅₀Zn₄₀Bi₁₀, the yield of MeOH amounting to 86-87% and 75%, respectively, at temperatures of 360° and 400°.  The product contained MeOH 89-92%, unsaturated compounds 2-4%, aldehydes and ketones 0.05-0.2%, and H₂O and other admixtures 9-4%.  Various reactions are described.  The difficulties in determining the amount of H₂O accompanying MeOH were overcome by the construction of a special apparatus, the product being treated with CaO.