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    • 8. 发明申请
    • PREPARATION OF AN ALDOL USING A BASE-MODIFIED CLAY CATALYST
    • 使用碱改性粘土催化剂制备ALD
    • WO00000456A1
    • 2000-01-06
    • PCT/US1999/014785
    • 1999-06-30
    • B01J21/16B01J23/02C01B33/44C07B61/00C07C29/145C07C29/17C07C45/62C07C45/66C07C45/72C07C45/73C07C45/74C07C45/75C07C67/44C07C69/28C07C29/141C07C31/20
    • C07C29/145B01J21/16B01J23/02C07C29/175C07C45/62C07C45/66C07C45/72C07C45/73C07C45/74C07C45/75C07C67/44C12C11/02Y02P20/52C07C31/20C07C49/04C07C47/02C07C47/19C07C47/27C07C47/36C07C31/12C07C31/202
    • The invention is a base-modified clay and an improved process for preparing a beta-hydroxy compound via an aldol condensation reaction using the base-modified clay as a catalyst. The base-modified clay comprises a clay having secluded conjugate base sites and exchangeable interstitial cationic spaces. In the base-modified clay, the interstitial hydroxyl groups have been converted to oxide sites, at least one structural hydroxyl group has been converted to an oxide site. The base-modified clay contains sufficient conjugate base cations to balance the charge of said oxide groups. The process for preparing a beta-hydroxy compound includes reacting a first carbonyl compound having at least one alpha hydrogen with a second carbonyl compound in the presence of a catalytic amount of a base-modified clay as described above. The invention also relates to a process for preparing a 1,3-diol comprising the hydrogenation of a beta-hydroxy compound prepared by the process described above. In yet another embodiment, the invention relates to a process for preparing a ketone or an alcohol comprising the dehydration of the above described beta-hydroxy-containing carbonyl compound followed by hydrogenation to produce the ketone. The alcohol is prepared by further hydrogenation of the ketone.
    • 本发明是碱改性的粘土和通过使用碱改性粘土作为催化剂的醛醇缩合反应制备β-羟基化合物的改进方法。 碱改性粘土包括具有隐蔽共轭碱基位点和可交换的间隙阳离子空间的粘土。 在基础改性的粘土中,间隙羟基已经转化为氧化物位点,至少一个结构羟基已转化为氧化物位点。 碱改性粘土含有足够的共轭碱阳离子以平衡所述氧化物基团的电荷。 制备β-羟基化合物的方法包括如上所述在催化量的碱改性粘土存在下使具有至少一个α氢的第一羰基化合物与第二羰基化合物反应。 本发明还涉及一种制备1,3-二醇的方法,其包括通过上述方法制备的β-羟基化合物的氢化。 在另一个实施方案中,本发明涉及一种制备酮或醇的方法,该方法包括将上述含有β-羟基的羰基化合物脱水,然后氢化制备酮。 通过酮的进一步氢化制备醇。