三羟甲基乙烷合成工艺研究  

Study of synthesis technology of trimethylolethane

作　　者：武志刚[1] 高建峰[1] 

机构地区：[1]中北大学理学院,山西太原030051

出　　处：《山西化工》2009年第6期9-11,共3页Shanxi Chemical Industry

基　　金：山西省高等学校科技开发项目资助(20081026)

摘　　要：以多聚甲醛和正丙醛为原料,分别以氨水和氢氧化钠为催化剂,采用两步法合成了三羟甲基乙烷。考察了催化剂种类、催化剂用量、反应温度和反应时间等对三羟甲基乙烷产率的影响,优化了反应条件。在15 g多聚甲醛、11 mL质量分数98%的正丙醛溶液、40 mL蒸馏水、5 mL质量分数50%NaOH溶液的反应条件下,于70℃反应1.5 h,三羟甲基乙烷产率最高可达95.2%。Using paraformaldehyde and propionaldehyde as starting material, ammonia as condensation catalyst, NaOH as Cannizzaro reaction cataslyst, trimethylolethane is synthesized by two steps reaction. The effects of different kind of catalysts including ammonia, diethylamine and triethylamine, the amount of ammonia, the reaction temperature and time are investigated. The optimum conditions are 15 g paraformaldehyde, 11 mL propionaldehyde （98%）, 40 mL deionized-distiUed water, the pH value of the reaction solution is adjusted to 8.4 by adding ammonia, temperature of condensation reaction is 55 ℃, condensation reaction time is 3.0 hour. After the condensation reaction, 5 mL 50% NaOH solution is injected, the temperature of Cannizzaro reaction is 70℃, Cannizzaro reaction time is 1.5 hours. Under these conditions, the yield of trimethylolethane is 95.2%.

关 键 词：三羟甲基乙烷 催化剂 康尼查罗反应 醇醛缩合 合成 

分 类 号：TQ031.2[化学工程]