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首页> 外文期刊>Enzyme and Microbial Technology >Enzymatic esterification of isoamyl alcohol obtained from fusel oil:Optimization by response surface methodolgy
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Enzymatic esterification of isoamyl alcohol obtained from fusel oil:Optimization by response surface methodolgy

机译：杂波油制得的异戊醇的酶促酯化反应面法优化

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摘要

Optimization of lipase-catalyzed production of industrially important isoamyl acetate was carried out by response surface methodology(RSM).Isoamyl alcohol which was distillated from fusel oil and acetic acid were used as the substrates.Immobilized lipase from Candida antarctica(Novozym 435)was catalyzed to this reaction in the solvent-free system.RSM based on five-level,four variable central composite rotatable design was used to evaluate the effects of important parameters on the production of isoamyl acetate.The parameters are acid/alcohol mole ratio(0.2-0.8),enzyme amount(4-12%,w/w),temperature(30-50 °C)and reaction time(4-8 h).It was found that the most effective parameter was acid/alcohol mole ratio.The model indicated the optimum conditions for maximum esterification(4.4 mmol ester/g mixture)in the acid/alcohol mole ratio of 0.8 for 12%(w/w)enzyme at 30 °C and after 8 h,which were in good agreement with the experimental value.The coefficient of determination(R2)for the model is 0.9968.Probability value(P< 0.0001)demonstrates a very high significance for the regression model.
机译：采用响应面法（RSM）对脂肪酶催化工业上重要的乙酸异戊酯的生产工艺进行优化，以杂醇油和乙酸为原料蒸馏得到的异戊醇为底物，以南极假丝酵母为固定化脂肪酶（Novozym 435）为催化剂。基于五级四变量中心复合可旋转设计的RSM用于评估重要参数对乙酸异戊酯生产的影响。该参数为酸/醇摩尔比（0.2- 0.8），酶用量（4-12％，w / w），温度（30-50°C）和反应时间（4-8 h）。发现最有效的参数是酸/醇摩尔比。模型表明在30°C和8h后，酸/醇摩尔比为0.8时，12％（w / w）的酶的最大酯化反应（4.4 mmol酯/ g混合物）的最佳条件与最佳条件一致。实验值。该模型的确定系数（R2）为0 .9968。概率值（P <0.0001）对回归模型具有非常高的意义。

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