2004•Huaxue Shijie (Chemical World)Requires access
Study on Synthesis of Trimethylolpropane
HU Ai-hong
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Abstract
The Synthesis of trimethylolpropane using a mixed solution of sodium carbonate and sodium hydrocarbonate as catalyst is introduced. The effects of the amount of catalyst and promoter, the ratio of reactants, the reaction temperature and the reaction time are investigated. The optimum conditions are: molar ratio of formaldehyde to n-butyraldehyde, 6∶1; molar ratio of sodium hydrocarbonate to n-butyraldehyde, 1.5∶1; mass ratio of promoter triethylamine to catalyst, 1.0%~1.5%; temperature of condensation reaction, 20~30℃; condensation reaction time 50~70 min; temperature of Cannizzaro reaction,55~60℃; Cannizzaro reaction time,100~120 min. The yield of TMP is 87.7% (based on n-butyraldehyde).