关键词:

紫外透过率, 乙二醇, 骨架镍催化剂, 催化加氢

Abstract:

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.

Key words:

紫外透过率, 乙二醇, 骨架镍催化剂, 催化加氢