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介绍了 2 0世纪 90年代国外固定床馏分油加氢裂化技术的三个重要进展 :开发了一批新的催化剂和稠环芳烃分离系统 ,进一步改进了反应器内构件。结合国外情况指出 :①中压加氢裂化将不会像高压加氢裂化那样在工业上得到广泛应用 ,也不会取代高压加氢裂化 ;②今后催化剂的发展方向仍是继续改进和提高沸石催化剂的活性、选择性和稳定性 ;③能力在 1.0Mt/a以下的装置宜采用单段流程 ,1.0Mt/a以上的装置宜采用两段流程 ;④加氢裂化装置生产乙烯装置原料看来是不合适的。
Three major advances in the hydrocracking technology abroad for fixed bed distillates were introduced in the 1990s: a series of new catalysts and condensed-aromatics separation systems were developed to further improve the internal components of the reactor. According to the situation abroad: (1) Medium-pressure hydrocracking will not be widely used in industry as high-pressure hydrocracking and will not replace high-pressure hydrocracking. (2) In the future, the direction of catalyst development is to continue to improve and enhance the utilization of zeolite catalysts A) The capacity of 1.0Mt / a below the device should adopt a single process, 1.0Mt / a above the device should adopt two processes; ④ hydrocracking unit to produce ethylene plant raw materials appears to be Not suitable.