Industrial sodium withdrawal method

Industrial sodium withdrawal method: First, add xylene and sodium metal to the reaction pot, heat to 130-140 ° C, keep warm for 1 hour, stop heating, stir for 1 hour, cool to 50 ° C with cooling water, start Anhydrous methanol was added dropwise, and anhydrous xylene was added as appropriate. The dropping rate was determined by the reflux rate of methanol and the amount of hydrogen released. After completion of the dropwise addition, the mixture was heated under reflux for 4 hours, and then cooled to room temperature to obtain a slurry of sodium methoxide. The xylene was distilled under reduced pressure, and then dried under vacuum for 4 hours, and then cooled with nitrogen to obtain a finished sodium methoxide. The yield is over 90%. Sodium methoxide can also be obtained by dehydration of sodium hydroxide with methanol in a continuous reaction at 85-100 °C.