摘要
采用不同类型的吸附剂液相吸附处理乙二醇产品中微量杂质以提高其紫外透光率。实验结果表明采用活性炭进行吸附的效果优于凹凸棒石黏土和活性氧化铝。同时研究了不同改性条件下的活性炭对提高乙二醇紫外透光率的影响,结果显示经高温氨水还原改性后的活性炭吸附剂对乙二醇样品中影响紫外透光率杂质的去除效果最佳,经处理后乙二醇在220nm、275nm和350nm处的紫外透光率值分别为81.23%、91.67%和99.23%,达到纤维级乙二醇标准。
As a raw material for making polyesters, ethylene glycol （EG） has a specification of UV transmittance. At present, some impurities that cause commercial ethylene glycol to low UV transmittance have been detected. In this paper, some kinds of commercial adsorbents such as activated carbon, attapulgite clay and activated aluminum oxide were used as adsorbents in liquid phase adsorption to remove the impurities and to improve the UV transmittance of ethylene glycol. It was found that the activated carbon treated with ammonia at a high temperature （800℃） showed the best capability to improve the UV transmittance of ethylene glycol. After adsorption treatment, the UV transmittance of EG sample at maximum absorption wave length of 220 nm, 275 nm, 350 nm were 81.23%, 91.67%, 99.23% respectively, meeting the fiber grade EG specification.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2006年第10期1158-1161,共4页
Chemical Industry and Engineering Progress
关键词
活性炭
乙二醇
表面改性
吸附剂
紫外透光率
activated carbon
ethylene glycol
modification
adsorbent
ultraviolet transmittance
