稀土杂多酸改性MCM-41催化剂及其在甲乙苯生产中的使用方法

• Format: Patent
• Language: Chinese
• Published: 03.07.2018
• 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

本发明公开了种稀土杂多酸改性MCM-41催化剂及其在甲乙苯生产中的使用方法，该催化剂制备时先采用水热合成法制备稀土改性MCM-41分子筛，然后负载杂多酸成型，最后焙烧获得。该催化剂用于以甲苯和乙醇为原料进行催化反应生产甲乙苯，生产原料中，甲苯和乙醇的重量比为1：（2～7），反应温度为300～350℃，反应压力为0.2～1.0MPa，质量空速为0.3～2h；所述质量空速=原料质量流量/催化剂质量。该催化剂能使甲苯和乙醇催化反应合成甲乙苯，可提高原料的转化率和提高甲乙苯的选择性。 The invention discloses a rare-earth-heteropoly-acid-modified MCM-41 catalyst and an application method of the same to methyl ethylbenzene production. When the rare-earth-heteropoly-acid-modified MCM-41 catalyst is prepared, firstly, rare-earth-modified MCM-41 molecular sieves are prepared with the hydrothermal synthesis method; secondly, the sieves is loaded with heteropoly acid for molding; finally, the rare-earth-heteropoly-acid-modified MCM-41 catalyst is obtained in a roasted mode. The catalyst is used for producing methyl ethylbenzene in a catalytic mode with methylbenzene and ethyl alcohol as raw materials; in the production raw materials, the weight ratio of the methylbenzene to the ethyl alcohol is 1: (2-7), the reaction temperature ranges from 300 DEG C to 350 DE