| 摘要 |
PURPOSE:To produce methyl chloride in high efficiency without using hydrogen chloride gas under a condition to cause little corrosion problem by reacting an aqueous solution of hydrochloric acid with methanol in the presence of a specific catalyst. CONSTITUTION:The objective methyl chloride is produced by reacting an aqueous solution of hydrochloric acid with methanol at 70-130 deg.C under normal pressure to 5kg/cm<2>G using triethylamine salt of tungstophosphoric acid as a catalyst. The amount of the catalyst is 1-50meq based on 100g of the reaction liquid having an initial hydrochloric acid concentration of 18wt.%. Methyl chloride is useful as a raw material for silicone resin, butyl rubber, methylcellulose, methylene chloride, chloroform, carbon tetrachloride, etc. The process also enables the synthesis of methyl chloride by utilizing waste hydrochloric acid. |
