催化加氢法提高乙二醇质量  

Catalytic hydrogenation to improve ethylene glycol quality

作　　者：曹玉霞[1] 陈群[1] 周继东[2] 张益峰[1] 

机构地区：[1]江苏工业学院精细石油化工重点实验室,江苏常州213164 [2]北京化工研究院,北京100013

出　　处：《化工学报》2008年第6期1600-1605,共6页CIESC Journal

摘　　要：对催化加氢法提高乙二醇质量进行了研究,考察了反应温度、压力和乙二醇空速对乙二醇紫外透过率和杂质去除率的影响。结果表明,在反应温度353K、乙二醇液时空速30h-1、压力0.25MPa、氢气质量空速0.02g·ml-1·h-1条件下,催化剂连续运行90d,乙二醇含水料在220、275、350nm的UV值由原来的49.6%、88.2%、97.7%平均提高到73.8%、93.2%、99.7%,精馏后乙二醇成品的紫外透过率平均提高到84.2%、95.1%、99.9%,杂质去除率提高到75.5%、60%、95.8%,成品的醛含量由原来的11.5μg·g-1下降到3.7μg·g-1。The method of catalytic hydrogenation was used to improve production of ethylene glycol （EG） over Raney nickel catalyst.Under the reaction condition of temperature 353 K , EG liquid hourly space velocity 30 h-1, H2 pressure 0.25 MPa, H2 mass space velocity 0.02 g·ml^-1·h^-1 and hydrogenation time 90 d, ultraviolet light transmittance of EG with water content at 220 nm, 275 nm and 350 nm were improved averagely from 49.6%, 88.2%, 97.7% to 73.8%, 93.2%, 99.7% respectively, and further to 84.2%, 95.1%, 99.9% after rectification.The removal efficiency of impurities was up to 75.5%, 60% and 95.8%.The amount of aldehyde was reduced from 11.5 μg·g^-1 to 3.7 μg·g^-1.

关 键 词：紫外透过率 乙二醇 骨架镍催化剂 催化加氢 

分 类 号：TQ223.162[化学工程—有机化工]