正交试验优化猪网油实验室碱炼脱酸工艺

采用实验室碱炼法脱除高酸值猪网油中的游离脂肪酸,研究碱液质量分数、超碱量、碱炼时间和碱炼初温对猪网油酸值和得率的影响。在单因素试验的基础上,设计四因素三水平正交试验,对猪网油实验室碱炼脱酸工艺参数进行优化。最佳碱炼脱酸条件:碱液质量分数21%、超碱量0.1%、碱炼时间70 min、碱炼初温45℃。采用上述脱酸条件,所得猪网油酸值为0.125 5 mg KOH/g、得率为78.89%,说明此方法可以有效脱除猪网油中的游离脂肪酸。

Optimization of Alkali Deacidification Process for Lard from the Greater Omentum by Orthogonal Array Design

Lard, obtained from the greater omentum, was subjected to alkali refining for the removal of free fatty acids in
this study. The effect of sodium hydroxide concentration, excessive alkali amount, treatment time and initial temperature
on the acid value and yield of lard were explored. Using a four-variable, three-level orthogonal array design established
based on single factor experiments, the optimum deacidification conditions for lard were achieved by refining with 21%
aqueous sodium hydroxide at an excessive alkali amount of 0.1% for 70 min at an initial temperature of 45 ℃. Under these
conditions, the acid value of lard was reduced to 0.125 5 mg KOH/g and the refining yield was 78.89%.