Method for increasing yield of xylene through lightening of heavy aromatic hydrocarbons

• Main Authors: KONG DEJIN, CHEN YAN, LI HUAYING, LI JINGQIU, TONG WEIYI
• Format: Patent
• Language: Chinese; English
• Published: 26.04.2017
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention relates to a method for increasing the yield of xylene through lightening of heavy aromatic hydrocarbons and mainly solves the problem that heavy aromatic hydrocarbon raw materials containing naphthalene compounds cannot be effectively treated with an existing alkyl transfer technique. By means of the method for increasing the yield of xylene through lightening of heavy aromatic hydrocarbons, effluents containing rich benzene, methylbenzene and xylene are produced from C9<+> heavy aromatic hydrocarbons containing the naphthalene compounds and taken as raw materials through two metal-supporting catalysts in the presence of hydrogen, the technical problem is solved better, and the method can be used for industrial production aiming at increasing the yield of xylene through lightening of the aromatic hydrocarbons. 本发明涉及种重质芳烃轻质化增产二甲苯的方法，主要解决现有的烷基转移技术不能有效处理含萘系化合物重芳烃原料的问题。本发明通过采用种重质芳烃轻质化增产二甲苯的方法，以含萘系化合物的C重芳烃为原料，在临氢条件下通过两种负载金属催化剂，生成富含苯、甲苯、二甲苯的流出物的技术方案，较好地解决了上述技术问题，可应用于芳烃轻质化增产二甲苯的工业生产中。