ethylene glycol (eg), also known as sweet alcohol, is a kind of important basic petrochemical organic raw materials, mainly for the production of polyester fiber, antifreeze, unsaturated polyester tree resin, lubricant, increasing plasticizer, non ion surface active agent and explosives, etc.. in addition, they can be used in the coatings, photographic developer, brake fluid and ink industry, served as the ammonium borate solvent and medium, used in the production of special solvent ethylene glycol ether, a very wide range of uses.
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乙二醇 | 项目 | 指标 | |||
优等品 | 一等品 | 合格品 | |||
外 观 | 无色透明无机械杂质 | 无色透明无机械杂质 | 无色透明微黄色无机械杂质 | ||
乙二醇（质量分数）% ≥ | 99.8 | 99.0 | — | ||
色度 | 加热前 ≤ | 5 | 10 | 40 | |
加盐酸加热后 ≤ | 20 | — | — | ||
密度 (20℃)/g/cm3 | 1.1128-1.1138 | 1.1125-1.1140 | 1.1120-1.1150 | ||
沸程(在0℃，0.10133mpa) | 初馏点℃ ≥ | 196 | 195 | 193 | |
终馏点℃ ≤ | 199 | 200 | 204 | ||
水份(质量分数)％ ≤ | 0.10 | 0.20 | — | ||
酸度(以乙酸计）％ ≤ | 0.001 | 0.003 | 0.01 | ||
铁 , % ≤ | 0.00001 | 0.0005 | — | ||
灰分,% ≤ | 0.001 | 0.002 | — | ||
二乙二醇%， ≤ | 0.10 | 0.80 | — | ||
醛（甲醛计）%， ≤ | 0.0008 | — | |||
紫外透光率 | 220nm时 ≥ | 75 | — | ||
275nm时 ≥ | 92 | — | |||
350nm时 ≥ | 99 | — | |||