The catalytic performances of the RE/HZSM-5 catalysts for the catalytic cracking of the mixed C4 hydrocarbons to produce light olefins were investigated.

In order to make full use of the resources of mixed C4,the esterification of acetic acid with the C4 mixture (which were composed of 1-butene,n-butane and isobutane) was studied by using phosphotungstic acid as the catalyst.

The trace amount of impurities,namely C5,tert-butyl alcohol,di-secondary butyl ether,methyl ethyl ketone and secondary butyl alcohol,in C4 hydrocarbon from butylene hydration tail gas were analysed by means of gas chromatograph with a column packed with sebaconitrile and polyethylene glycol-20M,and liquid-phase admission valve.

The pressure -composition data of C4 hydrocarbons dissolved in mixture of morpholine and N-formylmorpholine at different temperatures are determined with a static method.

Based on the investigation of the aromatization-alkylation process of C4 hydrocarbons,the thermodynamic analysis of the process was carried out and reaction heat of the process was obtained by theoretical calculation as well as simulation with Aspen Plus software.

The activities of propane and C 4 hydrocarbon aromatization over Zn/PLC and Zn/HZSM 5 catalysts were tested.

Mixed dimethyl esters are synthesized with by-product C4~C6 mixed dibasic acids by the traditional catalyst of sulfuric acid.