| 五种酯类化合物极微蒸气压的扭转法测定 |
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| 引用本文： | 陈军,梁英华.五种酯类化合物极微蒸气压的扭转法测定[J].化工学报,1997,48(5):622-625. |
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| 作者姓名： | 陈军 梁英华 |
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| 作者单位： | 天津大学化工系,天津大学化工系,天津大学化工系 天津 300072
,天津 300072
,天津 300072 |
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| 基金项目： | 国家自然科学基金项目(No.29170280) |
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| 摘 要： | <正> 引言 物质的饱和蒸气压是最重要的物性数据之一.在化工设计、生产与科学研究中,如农药、化肥的储存,香料的挥发速度,橡胶、塑料中增塑剂的有效寿命等,对有机酯类化合物低蒸气压数据要求迫切.由于测定难度以及数据准确性等问题,目前极微蒸气压的数据非常缺乏.测定方法主要有Knudsen隙透法和同位素示踪法,后者由于实验条件苛刻而很少
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| 关 键 词： | 极微蒸气压 扭转法 酯类化合物 饱和蒸气压 蒸发 |
DETERMINATION OF EXTREMELY-LOW VAPOR PRESSURE OF FIVE ESTERS BY USING TORSION-EFFUSION METHOD |
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| Chen Jun,Liang Yinghua and Ma Peisheng.DETERMINATION OF EXTREMELY-LOW VAPOR PRESSURE OF FIVE ESTERS BY USING TORSION-EFFUSION METHOD[J].Journal of Chemical Industry and Engineering(China),1997,48(5):622-625. |
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| Authors: | Chen Jun Liang Yinghua and Ma Peisheng |
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| Abstract: | An experimental apparatus was established for determining extremel - low vapor pressure by Knudsen torsion-effusion method. The torsion - effusion constant K of the instrument were experimentally determined by vaporizing n - hexadecane which is chosen as a standard substance. To check the reliability of the K values, vapor pressures of 1 - octadecene were measured and compared with the values selected. Vapor pressures of 5 esters including dimethyl adipate, diethyl adipate, dibutyl maleate, diethyl sebacate, dipentyl phthalate were determined at temperatures from 293 K to 373 K and correlated by the Antoine equation. |
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| Keywords: | extremely-low vapor pressure Knudsen effusion torsion method |
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