均匀试验设计在超临界CO_2萃取核桃油精炼中的应用

The Application of Uniform Design on Refining Walnut Oil Extracted by Supercritical CO_2

以超临界CO2萃取的核桃油为原料,采用均匀试验设计优化其精炼工艺。结果表明:脱酸最适条件为:加碱浓度11.06%,超碱量0.1%,初温45℃,终温80℃;脱色最适条件:活性炭3%,脱色温度85℃,搅拌速度90 r/min,脱色时间50min;脱臭最适条件:温度80℃减压蒸馏脱臭1 h。经过精炼的核桃符合我国粮油行业有关核桃油的标准(GB/T 22327-2008)要求。

Abstract The process of refining walnut oil extracted by supercritical CO2 was studied using Uniform design method. The results showed that the optimum technological parameter of deacidification were as follows： 11. 06% alkali, 0. 1% ultra - alkali, 45 ℃ the initial neutralization temperature, 80 ℃ the final neutralization temperature. The decoloration process was stirring speed of 90 r/rain for 50 min, with absorbite at 85 ℃. The deodorization by vacuum distillation was at 80 ℃ for lh. After refining, the walnut oil qualified the standards of GB/T 22327 - 2008.