The friction and wear properties of silicon nitride (Si_3N_4) under dry sliding, water and ethanol lubricating conditions were investigated using a reciprocating pin-on-block tester.

Study on characterization of MgO-Al_2O_3 oxides and catalytic of ethanol dehydration nature;

Analysis for the process of ethanol dehydration to olefins;

Energy-saving ethanol dehydration techniques to produce dehydrated alcohol mainly included four measures as azeotropy distillation,extraction distillation,absorptive process and membrane separation.

The Troubleshooting and Refitting of the Water-glycol Hydraulic System;

The present situation of water-glycol fire resistant hydraulic fluid about production and application inside and outside China is expounded, citing the applications of water-glycol fire resistant hydraulic fluid produced by some manufacturers in metallurgical industries.

This paper introduces the composition,characteristic and use notice of water-glycol hydraulic fluid,and expounds the its methods of maintenance and administration.