Catalyst for toluene disproportionation and transalkylation, and preparation method thereof

• Main Authors: QI XIAOLAN, KONG DEJIN, DENG CHENGHAO, LI JINGQIU
• Format: Patent
• Language: Chinese; English
• Published: 07.09.2018
• 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 catalyst for toluene disproportionation and transalkylation, and a preparation method thereof. A purpose of the present invention is mainly to solve the technical problems of high aromatic ring loss rate and high reaction hydrogen consumption caused by excessive hydrogenation activity in the noble metal modified catalyst in the prior art. According to the present invention, the catalyst comprises a Group VIII metal, a silicon-aluminum molecular sieve and an inorganic alumina binder, the metal content is 0.005-0.5 wt%, the metal nanoparticles are positioned on the surface of the inorganic alumina, and the metal and the molecular sieve have good synergistic catalysis effect; and with the technical scheme, the technical problems of high aromatic ring loss rate and high reaction hydrogen consumption can be well solved. 种用于甲苯歧化与烷基转移的催化剂及其制备方法，主要解决现有技术中贵金属改性的催化剂由于加氢活性过高而导致芳环损失率高、反应氢耗大的技术问题。该方法所涉及的催化剂包含第VIII族金属、硅铝分子筛和无机氧化铝粘结剂，其特征是采用金属重量含量为0.005-0.5wt％，金属纳米粒子位于无机氧化铝表面，金属与分子筛具有更优的协同催化作用，能够较好