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    • 1. 发明授权
    • Metaloxide—ZrO2 catalysts for the esterification and transesterification of free fatty acids and triglycerides to obtain bio-diesel
    • 用于酯化和酯交换游离脂肪酸和甘油三酯以获得生物柴油的金属氧化物 - ZrO2催化剂
    • US09433924B2
    • 2016-09-06
    • US13508738
    • 2010-11-08
    • Manhoe KimSteven O. SalleyK. Y. Simon Ng
    • Manhoe KimSteven O. SalleyK. Y. Simon Ng
    • B01J21/06B01J21/08B01J23/00B01J23/06B01J23/10B01J23/80B01J37/03C11C3/00
    • B01J21/066B01J21/063B01J23/002B01J23/06B01J23/10B01J23/80B01J37/031B01J37/036B01J2523/00C10G2300/1003C10G2300/1011C11C3/003Y02E50/13Y02P30/20B01J2523/27B01J2523/3725B01J2523/41B01J2523/47B01J2523/48B01J2523/3743B01J2523/847B01J2523/3787
    • Mixed metal oxide catalysts (ZnO, CeO, La2O3, NiO, Al203, Si02, TiO2, Nd2O3, Yb2O3, or any combination of these) supported on zirconia (ZrO2) or hydrous zirconia are provided. These mixed metal oxide catalysts can be prepared via coprecipitation, impregnation, or sol-gel methods from metal salt precursors with/without a Zirconium salt precursor. Metal oxides/ZrO2 catalyzes both esterification and transesterification of oil containing free fatty acids in one batch or in single stage. In particular, these mixed metal oxides supported or added on zirconium oxide exhibit good activity and selectivity for esterification and transesterification. The low acid strength of this catalyst can avoid undesirable side reaction such as alcohol dehydration or cracking of fatty acids. Metal oxides/ZrO2 catalysts are not sensitive to any water generated from esterification. Thus, esterification does not require a water free condition or the presence of excess methanol to occur when using the mixed metal oxide catalyst. The FAME yield obtained with metal oxides/ZrO2 is higher than that obtained with homogeneous sulfuric acid catalyst. Metal oxides/ZrO2 catalasts can be prepared as strong pellets and in various shapes for use directly in a flow reactor. Furthermore, the pellet has a strong resistance toward dissolution to aqueous or oil phases.
    • 提供负载在氧化锆(ZrO2)或含水氧化锆上的混合金属氧化物催化剂(ZnO,CeO,La2O3,NiO,Al2O3,SiO2,TiO2,Nd2O3,Yb2O3或它们的任意组合)。 这些混合金属氧化物催化剂可以通过共沉淀,浸渍或溶胶 - 凝胶法从具有/不具有锆盐前体的金属盐前体制备。 金属氧化物/ ZrO2催化一批或单一阶段含油游离脂肪酸的酯化和酯交换反应。 特别地,负载或添加到氧化锆上的这些混合金属氧化物表现出良好的酯化和酯交换活性和选择性。 该催化剂的低酸强度可以避免不希望的副反应,例如醇脱水或脂肪酸的裂解。 金属氧化物/ ZrO2催化剂对由酯化产生的任何水不敏感。 因此,当使用混合金属氧化物催化剂时,酯化不需要无水条件或过量甲醇的存在。 用金属氧化物/ ZrO2获得的FAME产率高于用均相硫酸催化剂获得的FAME产率。 金属氧化物/ ZrO 2催化剂可以制备成强颗粒,并且可以用于流动反应器中直接使用的各种形状。 此外,颗粒对水相或油相具有很强的溶解性。