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随着石油化工行业的快速发展,市场上轻芳烃供不应求,而C_9、C_(10)重芳烃的产量却在不断增长,因此,重芳烃脱烷基制取轻芳烃技术越来越引起人们的重视,成为国内外生产轻芳烃的重要手段之一。重芳烃制取BTX技术的研究主要包括催化剂和工艺技术路线两方面。重芳烃轻质化技术路线包括热加氢脱烷基、催化加氢脱烷基、催化加氢裂解、催化非临氢裂解和烷基苯水蒸气脱烷基等方法,涉及脱烷基、歧化和烷基转移等反应。比较有代表性的国外重芳烃轻质化反应工艺技术包括HAD、Detol、Transplus等,国内技术以中国石化石油化工科学研究院(RIPP)、中国石化上海石油化工研究院(SRIPT)的重芳烃轻质化技术为主,各工艺都有其优缺点。重芳烃制取BTX技术发生的反应所用催化剂多属于酸性,未来开发小颗粒、大孔径以及抗积炭能力良好的固体酸催化剂,尤其是催化加氢脱烷基反应和烷基转移反应催化剂,对提高C_9+重芳烃利用价值和增产附加值高的BTX具有重要意义。
With the rapid development of the petrochemical industry, there is a shortage of light aromatic hydrocarbons on the market, while the production of heavy aromatic hydrocarbons C9 and C10 is on the rise. Therefore, heavy aromatic hydrocarbon dealkylation technology has drawn more and more attention , Has become one of the important means of producing light aromatic hydrocarbons at home and abroad. Heavy aromatic hydrocarbon preparation BTX technology mainly includes two aspects of the catalyst and process technology route. Heavy aromatics light weight technology route includes thermal hydrodealkylation, catalytic hydrodealkylation, catalytic hydrocracking, catalytic non-hydrogen cracking and alkylbenzene steam dealkylation methods, involving dealkylation, disproportionation And transalkylation and other reactions. The representative foreign heavy aromatic hydrocarbon light-weight reaction process technologies include HAD, Detol, Transplus and so on. The domestic technologies are based on the heavy aromatic hydrocarbon light of Sinopec Petrochemical Research Institute (RIPP) and Sinopec Shanghai Petrochemical Research Institute (SRIPT) Qualitative technology-based, each process has its advantages and disadvantages. Most of the catalysts used in the reaction of BTX with heavy aromatics are acidic. In the future, solid acid catalysts with small particle size, large pore size and good resistance to carbon deposition are developed, especially for catalytic hydrodealkylation and transalkylation reactions. It is of great significance to improve the value of C_9 + heavy aromatics and increase BTX with high added value.