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在一個1升的三口燒瓶上,装一搅拌器,一滴液漏斗,一溫度計和一球形冷疑管。自球形冷凝管上口导一橡皮管,通入冷水中,以便吸收鹽酸氣。此三口燒瓶內,即放以聚甲醛45克(1.5克分子),三氧乙烯130毫升(1.45克分子),研細的硫酸銅4克。然後一边自滴液漏斗逐漸滴入濃硫酸250毫升,一边劇烈攪拌,並以冷水浴冷却,在20—30℃之間保持1小時,即將
A 1-liter three-necked flask was equipped with a stirrer, a dropping funnel, a thermometer and a spherical tube. Since the spherical condenser tube leading a rubber tube, into the cold water, in order to absorb hydrochloric acid gas. This three-necked flask, which put 45 grams of polyoxymethylene (1.5 grams), 130 ml of ethylene oxide (1.45 grams), finely ground copper sulfate 4 grams. Then, while gradually dropping 250 ml of concentrated sulfuric acid from the dropping funnel, vigorously stirred and cooled in a cold water bath, maintained at 20-30 ° C for 1 hour,