Hu Bo
2009
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0
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Journal
Applied Chemical Industry
Abstract
Trimethylolethane(TME) was synthesized from n-propylaldehyde,an aqueous solution of formaldehyde and an aqueous solution of sodium hydroxide through aldol condensation reaction and Cannizzaro reaction.Considering emphatically the aldol condensation reaction and the Cannizzaro reaction and the optimum reaction conditions were obtained:the condensation reaction temperature about 35 ℃,n(n-propylaldehyde) ∶n(formaldehyde) ∶n(sodium hydroxide)=1 ∶3.2 ∶1.05,the condensation reaction time 2 h;the Cannizzaro reaction temperature about 65 ℃,the conversion rate of TME 90%.The product were isolated from the crude reaction solution of TME by solvent extraction process desalination,ion-exchange,azeotropic dehydration,crystallization and recrystallization.The total yield of TME75% and purity95% under the optimum reaction condition.