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| 酶法催化漆蜡合成漆蜡基异丙酯工艺研究 |
| Lipase catalyzed synthesis of isopropyl ester from lacquer wax |
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| DOI： |
| 中文关键词: 漆蜡 酶催化 漆蜡基异丙酯 |
| 英文关键词:lacquer wax lipase catalysis isopropyl ester from lacquer wax |
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| 中文摘要: |
| 以脂肪酶为催化剂，催化漆蜡与异丙醇进行酯交换反应合成漆蜡基异丙酯。首先采用傅里叶红外光谱对合成产物进行结构表征，然后采用单因素试验和正交试验对酯交换反应条件进行了优化，并对最佳条件下合成的漆蜡基异丙酯的组成进行了GC-MS分析。结果表明：在脂肪酶催化下，漆蜡可与异丙醇反应生成目标产物；Novozyme 435脂肪酶催化酯交换反应的最佳工艺条件为醇蜡比4∶?1、脂肪酶加量10 g/L、反应温度55?℃、反应时间36 h，在此条件下酯交换率为86.7%，漆蜡基异丙酯的酸价（KOH）为3.28 mg/g；漆蜡基异丙酯主要由棕榈酸异丙酯（73.64%）、油酸异丙酯（19.39%）、硬脂酸异丙酯（6.15%）和亚油酸异丙酯（0.82%）组成。 |
| 英文摘要: |
| Synthesis of isopropyl ester from lacquer wax by transesterification with lipase catalyst was studied. The structure of the synthesized product was characterized by FT-IR. The transesterification conditions were optimized by single factor experiment and orthogonal experiment, and the compositions of the product synthesized under the optimal conditions were analyzed by GC-MS. The results showed that the isopropyl ester could be obtained by transesterification of lacquer wax and isopropanol with lipase as catalyst. The optimal conditions were obtained as follows: ratio of isopropanol to lacquer wax 4∶?1, Novozymes 435 lipase dosage 10 g/L, reaction temperature 55?℃, reaction time 36 h. Under these conditions, the transesterification rate was 86.7%, and the acid value of isopropyl ester from lacquer wax was 3.28 mgKOH/g. The product was mainly composed of isopropyl palmitate（73.64%）, isopropyl oleate（1939%）, isopropyl stearate（6.15%） and isopropyl linoleate（0.82%）. |
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