Production of maleic or fumaric acid from levulinic acid
    2.
    发明授权
    Production of maleic or fumaric acid from levulinic acid 有权
    从乙酰丙酸生产马来酸或富马酸

    公开(公告)号:US09187399B2

    公开(公告)日:2015-11-17

    申请号:US14592435

    申请日:2015-01-08

    IPC分类号: C07C51/367 B01J8/02

    摘要: The production of maleic acid and fumaric acid (or the anhydride form of either, maleic anhydride) via gas-phase, oxidative cleavage of levulinic acid in a single packed bed reactor over a reducible oxide catalyst. The production may be carried out in an initial mixing vessel into which levulinic acid is continuously charged and mixed with both inert (He, N2, Ar, etc.) and oxidizing (O2, air, etc.) gases. The feed stream can then be safely heated to reaction temperature, which generally ranges from 200-500° C., without initiating polymerization, in a second stage preheater that thermally equilibrates the gaseous mixture of LA, O2, and inert diluent and fed to a third stage catalytic reactor for final processing.

    摘要翻译: 通过气相生产马来酸和富马酸(或其酐形式的马来酸酐),通过可还原氧化物催化剂在单个填充床反应器中氧化裂解乙酰丙酸。 生产可以在初始混合容器中进行,其中乙酰丙酸被连续加入并与惰性(He,N 2,Ar等)和氧化(O 2,空气等)气体混合。 然后可以将进料流安全地加热至反应温度,反应温度通常在200-500℃的范围内,而不引发聚合,在第二阶段预热器中,其使LA,O2和惰性稀释剂的气态混合物热平衡并进料至 用于最终加工的第三级催化反应器。

    PRODUCTION OF MALEIC OR FUMARIC ACID FROM LEVULINIC ACID
    4.
    发明申请
    PRODUCTION OF MALEIC OR FUMARIC ACID FROM LEVULINIC ACID 有权
    从水杨酸生产马来酸或富马酸

    公开(公告)号:US20150191411A1

    公开(公告)日:2015-07-09

    申请号:US14592435

    申请日:2015-01-08

    IPC分类号: C07C51/367 B01J8/02

    摘要: The production of maleic acid and fumaric acid (or the anhydride form of either, maleic anhydride) via gas-phase, oxidative cleavage of levulinic acid in a single packed bed reactor over a reducible oxide catalyst. The production may be carried out in an initial mixing vessel into which levulinic acid is continuously charged and mixed with both inert (He, N2, Ar, etc.) and oxidizing (O2, air, etc.) gases. The feed stream can then be safely heated to reaction temperature, which generally ranges from 200-500° C., without initiating polymerization, in a second stage preheater that thermally equilibrates the gaseous mixture of LA, O2, and inert diluent and fed to a third stage catalytic reactor for final processing.

    摘要翻译: 通过气相生产马来酸和富马酸(或其酐形式的马来酸酐),通过可还原氧化物催化剂在单个填充床反应器中氧化裂解乙酰丙酸。 生产可以在初始混合容器中进行,其中乙酰丙酸被连续加入并与惰性(He,N 2,Ar等)和氧化(O 2,空气等)气体混合。 然后可以将进料流安全地加热至反应温度,反应温度通常在200-500℃的范围内,而不引发聚合,在第二阶段预热器中,其使LA,O2和惰性稀释剂的气态混合物热平衡并进料至 用于最终加工的第三级催化反应器。

    PRODUCTION OF PROTOANEMONIN BY OXIDATION OF LEVULINIC ACID OR ANGELICALACTONE ISOMERS

    公开(公告)号:US20210214325A1

    公开(公告)日:2021-07-15

    申请号:US17148615

    申请日:2021-01-14

    IPC分类号: C07D307/20 B01J23/22

    摘要: A process for forming protoanemonin from an amount of levulinic acid or an amount of α-Angelica lactone using oxidative dehydrogenation. Biomass-derived levulinic acid (LA) is a green platform chemical and, using an oxidative scission pathway can be transformed into cyclic intermediates, namely angelicalactones to form protoanemonin. The oxidative dehydrogenation may be heterogeneously catalyzed in a gas-phase to perform aerobic oxidation using a solid oxide such as vanadium oxide. Protoanemonin is an intriguing polyfunctional molecule that is uniquely suited to bio-based production, and can be synthesized in yields from 50%-75% during periods of transient reactor operation.