磷钨酸季铵盐催化制备环氧化桐油甲酯及其性能研究

doi:10.3969/j.issn.0253-2417.2017.03.008

Abstract

Abstract: A quaternary ammonium phosphotungstates phase transfer catalyst (C₁₂H₂₅C₆H₅N)₃[PW₄O₁₆] was synthesized by using phosphotungstic, hydrogen peroxide(30%) and dodecylpyridinium chloride as feedstock. This phase transfer catalyst was used for the epoxidation of tung oil methyl ester(TOME) and manufacture the epoxidized tung oil methyl ester(ETOME). It was found that the system consist of phase transfer catalyst, TOME and hydrogen peroxide can be regarded as a homogeneous system and the reaction rate was accelerated. Effect of different conditions on the epoxidation reaction of methyl tung oil was investigated. Results showed that the optimum conditions were 50℃ reaction temperature, 3 h reaction time, 1.6:1 molar ratio of hydrogen peroxide to double bond and catalyst dosage was 3.0%. The epoxy value of ETOME can reach 4.9% under these optimum condition. Thermogravimetric analysis showed that the descending order of thermal stability of the products was ETOME > TO > TOME.

Key words: quaternary ammonium phosphotungstates, tung oil methyl ester, epoxidation, phase transfer

CLC Number:

TQ35

ZHENG Minrui, ZHANG Meng, HU Lihong, BO Caiying, ZHOU Yonghong. Synthesis and Properties of Epoxidized Tung Oil Methyl Ester from Tung Oil Methyl Ester with Quaternary Ammonium Phosphotungstate as Catalyst[J]. Chemistry and Industry of Forest Products, 2017, 37(3): 61-66.

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Synthesis and Properties of Epoxidized Tung Oil Methyl Ester from Tung Oil Methyl Ester with Quaternary Ammonium Phosphotungstate as Catalyst

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