By introducing the impact on sulphuric acid system equipment and alum catalyst by fluorine,this paper discusses and put forwards measures against corrosion by fluorine and its damage to catalyst.

The process of recovering vanadium pentoxide from vanadic catalyzer waste by oxidizing roasting was studied .

Influences of the service life of catalyst on the conversion of acetylene;

Experiment research on the catalyst used for special type diamond synthesis;

Effect of grit size of iron base catalyst and its uniformity on the synthesis of diamond;

The interface lattice fitting does not play the key role in catalysis by the analyses of Yu's empirical electron theory of solids and molecules and Cheng's improved TFD model.

By employing Yu’s empirical electron theory of solids and molecules and Cheng’s improved TFD model expressing the equal electron density on the interfaces, it is shown that the interface lattice fitting does not play the key role in catalysis.