焦化粗苯的组成及其加氢精制工艺技术的开发

Crude benzol coking products and development of its hydro-refining technology

采用色谱-质谱联用技术（GC—MS）、气相色谱-氢火焰检测器（GC—FID）、气相色谱-火焰光度检测器（GC—FPD）等对轻苯的全组成、硫化物的种类以及含量等进行了分析。结果表明：轻苯中苯、甲苯等单环芳烃占其总质量的94．90％，其中的杂质主要是硫化物、氮化物、烯烃等，而轻苯加氢精制的关键是噻吩及烷基噻吩的加氢脱除。通过对国外几种主要的粗苯加氢精制工艺的比较分析，指出低温法是适合我国国情的粗苯精制方法。最后介绍了国内粗苯加氢精制工艺及催化剂研究的概况，并探讨了粗苯低温法加氢精制工艺及催化剂改进的方向。

Species and contems of various constituents, especially sulfides in light benzol are analyzed by gas chromatogram-mass spectrometry （ GC-MS ）, gas chromatogram-flame ionization detector （GC-FID）, and gas chromatogram-flame photometric detector （GC-FPD）. The results show that the total content of monocyclic aromatic hydrocarbon such as benzol, toluene etc. in the light benzol is up to 94.90% ;other impurities mainly include sulfide, nitride and olefin etc., among which removal of thiophene and alkyl thiophene is the vital question in hydro-refining of the light benzol. By comparison of various benzol hydro-refining technologies abroad, it is considered that the low-temperatttre benzol hydro-refining technology is the preferable benzol refming process for c.oking enterprises in China. Finally, the development of technologies and catalysts for the crude benzol hydro-refining in China is introduced, and improvements for low-temperature benzol hydro-refining and corresponding catalysts are discussed.