Modified nanoscale HZSM-5 molecular sieve catalyst and preparation method thereof

• Main Authors: HUANGFU JIAOJIAO, GUO QIANGSHENG, ZHAI XIAOLONG, MAO DONGSEN
• Format: Patent
• Language: Chinese; English
• Published: 27.02.2018
• 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 discloses a modified nanoscale HZSM-5 molecular sieve catalyst and a preparation method thereof. With a nanoscale HZSM-5 molecular sieve, sodium hydroxide, ammonium nitrate and magnesiumacetate as raw materials, the method disclosed by the invention adopts a hydrothermal method and an equivalent-volume impregnation compound modification method to modify the nanoscale HZSM-5 molecular sieve. The method disclosed by the invention has the advantages of simplicity, convenience in operation, environment-friendliness, little energy consumption, low production cost, remarkable effect and convenience in popularization and application. A catalyst product prepared by the method disclosed by the invention can significantly decrease the average carbon deposition rate of the HZSM-5 molecular sieve, and has higher propylene selectivity and a longer catalyst service life. 本发明公开了种改性纳米HZSM-5分子筛催化剂及其制备方法。本发明方法以纳米HZSM-5分子筛、氢氧化钠、硝酸铵和乙酸镁为原料，采用水热法以及等体积浸渍复合改性的方法对纳米HZSM-5分子筛进行改性。本发明方法简单，操作便捷，环境友好，能耗少，生产成本低，效果显著，便于推广应用。