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Effect of Pressure. Blank runs made at 400°to 700°C.at atmospheric pressure showed only traces of methanol and formaldehyde. As would be expected, the effect of increased pressure is to increase the amount of methyl alcohol in the product. However, although the yield of methyl alcohol still continued to rise, the rate of increase of the total oxygen efficiency and carbon conversion to desirable products (methyl alcohol, formaldehyde, and formic acid) fell off with increasing pressure. Most of the experiments were made at 135 atmospheres.

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THE AVAILABILITY and cost of natural and refinery gases are discussed. The reactions of saturated and unsaturated hydrocarbons with respect to cracking, oxidation, halogenation, addition, and polymerization are dealt with in the light of recent data. 13 INDUSTRIAL AND ENGINEERING CHEMISTRYVol. 24, No. 1 154°C. lower than methane, the average ignition temperatures for propane and butane differ only by 22°C.

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