• The headspace gathered more ester compounds in aroma composition than that of reduced pressure distillation.

    空法富集的芳香成分酯类化合物含量较减压蒸馏富集法高。

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  • The reduced pressure distillation experiment on the liquid paraffin was done and the Engler distillation curve was obtained.

    进行石蜡减压蒸馏实验得到了恩氏蒸馏曲线

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  • The high-purity MPC standard sample was obtained by reduced pressure distillation and the removal of minor phenol with dilute sodium hydroxide solution.

    反应产物减压精馏、碱洗、水洗、干燥等精制处理,得到了纯度较高的M PC标准

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  • The oil is extracted with suitable solvent from the oil treated with homogenizer. After removing the solvent by reduced pressure distillation, the oil is obtained finally.

    本文使用分散机浆,利用溶剂提取油料中的油脂,再减压旋蒸除掉溶剂,得到油脂。

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  • It is reveal by GC analysis that the purity of the TMP, treated by reduced pressure distillation and recrystallization in acetic ester, approximates to that of the reagent grade TMP.

    GC分析结果表明采用减压蒸馏乙酸乙结晶并用方法精制TMP纯度接近试剂TMP。

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  • The advantage and disadvantage of the five recycling methods, direct heating, direct aqueous vapor, indirect aqueous vapor, reduced pressure distillation, precipitation method, is discussed.

    探讨直接加热法、直接水蒸汽间接水蒸汽法、减压蒸馏、酒精沉淀五种回收方法优缺点

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  • This paper introduced a new type and special structured vacuum pump unit suitable for dry type reduced-pressure distillation.

    本文介绍适用减压蒸馏的特殊结构真空设备

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  • Veratryl alcohol was synthesized through the reduction of sodium borohydride from veratraldehyde with isopropanol as solvent, followed by solvent extraction and distillation under reduced pressure.

    藜芦醛为主要原料、异溶剂氢化还原、溶剂萃取、减压精馏得到产物藜芦醇。

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  • The process flow and production practice of air-distillation and reduced-pressure distillation for tar in Jigang coking plant are introduced.

    介绍了济钢焦化厂焦油常、减压蒸馏工艺流程生产实践

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  • Garlic plant volatile was extracted by steam distillation under reduced pressure, and the chemical components were determined by GC-MS analysis.

    采用减压水蒸气蒸馏法提取出蒜苗挥发物GC - MS法分析鉴定化学成分

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  • Garlic plant volatile was extracted by steam distillation under reduced pressure, and the chemical components were determined by GC-MS analysis.

    采用减压水蒸气蒸馏法提取出蒜苗挥发物GC - MS法分析鉴定化学成分

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