沸石分子筛脱除蓖麻油多元醇中微量水的研究

Study on Removing the Trace Water in Castor Oil Polyols by Zeolite Molecular Sieve

基于蓖麻油多元醇中水分对灌封胶外观及绝缘电阻(IR)的不良影响,以3 A和4 A沸石分子筛为脱水剂,对蓖麻油多元醇中微量水进行脱水干燥实验。研究了沸石分子筛水分含量对其脱除蓖麻油多元醇中微量水的影响。测试结果表明:蓖麻油多元醇与3A分子筛重量比为10:1,蓖麻油多元醇混合物与4A分子筛重量比为100:5,干燥脱水。当3 A分子筛含水量≤0.50%和4 A分子筛含水量≤1.6%时,含水率明显下降,达到脱水干燥效果。随着分子筛含水量的增加,3 A和4 A分子筛对蓖麻油多元醇中微量水的脱除干燥失效。

To mitigate the adverse effects of moisture in castor oil polyols on the appearance and insulation resistance(IR)of sealants,tests were conducted using 3 A and 4 A zeolite molecular sieves as dehydrating agents.The aim was to eliminate trace water from castor oil polyols.The study investigated the impact of moisture content in zeolite molecular sieves on the removal of trace water in castor oil polyols.The results revealed that,with a weight ratio of castor oil polyols to 3 A molecular sieve at 10:1 and a weight ratio of castor oil polyols mixture to 4 A molecular sieve at 100:5,effective dehydration and drying were achieved when the moisture content of 3 A molecular sieve was below 0.50%and that of 4 A molecular sieve was below 1.6%.As the moisture content of the molecular sieve increased,both 3 A and 4 A molecular sieves were ineffective in removing and drying trace water in castor oil polyols.