Heteropoly acid catalyst and preparation method thereof

• Main Authors: YANG GUANG, LIU JIE, SUN SUHUA, JIN HAO, JIANG LIJING, ZHU HUIHONG
• Format: Patent
• Language: Chinese; English
• Published: 29.06.2016
• 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 heteropoly acid catalyst and a preparation method thereof. The catalyst adopts alumina as the carrier, uses heteropoly acid as the active component, and takes boron oxide as the assistant, wherein the surface of the alumina carrier is coated with silica. The preparation method consists of: coating the surface of the alumina carrier with an appropriate amount of silica, and then loading heteropoly acid and the assistant component. The catalyst has high activity and selectivity when used for preparation of ethylene by ethanol dehydration. 本发明公开了一种杂多酸型催化剂及其制备方法。该催化剂采用氧化铝载体，以杂多酸为活性组分，助剂为氧化硼，其中氧化铝载体表面包覆二氧化硅，其制备方法是在氧化铝载体表面包覆适量的二氧化硅，然后再负载杂多酸和助剂组分。该催化剂用于乙醇脱水制乙烯时具有较高的活性和选择性。