Using the orange peel as material, the perfume essential oil (the main ingredient of limonene) respectively was extracted by soxhlet's extraction methods(SEM),solvent-extraction and cool-milling extraction.
研究表明 ,冷磨萃取法优于索氏提取法和浸提萃取法 ;以出油率为基准 ,冷磨萃取法适宜的工艺条件为 :搅拌时间为 2 0min ,石油醚溶剂与冷磨液体积比为 2∶5 ,萃取次数为 1次 ;精制后的香精油得率为 1 92 % ,其中含柠烯86 36 %。
Through analyzing the variation of cylinder airproof performance during cold running-in process,the condition-based cold running-in criterion based on the variety law of cylinder compression pressure was proposed.
通过对发动机冷磨合过程中的气缸密闭性变化分析,提出了基于冷磨合过程中气缸压缩压力变化规律的视情冷磨合规范。
Condition-based cold running-in criterion of engine based on the variation pattern of reverse drive torque;
基于反拖扭矩变化发动机视情冷磨合规范研究