催化加氢法提高乙二醇质量

对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353 K、乙二醇液时空速 30 h^-1、压力0.25 MPa、氢气质量空速0.02 g·ml^-1·h^-1条件下，催化剂连续运行90 d，乙二醇含水料在220、275、350 nm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11.5 μg·g^-1下降到3.7 μg·g^-1。

Catalytic hydrogenation to improve ethylene glycol quality

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.