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    • 7. 发明申请
    • Process for producing acrolein and acrylic acid
    • 制备丙烯醛和丙烯酸的方法
    • US20100249455A1
    • 2010-09-30
    • US12662123
    • 2010-03-31
    • Michio TanimotoHideo Onodera
    • Michio TanimotoHideo Onodera
    • C07C51/25C07C45/35
    • C07C45/35C07C51/252C07C47/22C07C57/04
    • The invention offers an improvement in a process for start-up in the occasion of producing acrolein and acrylic acid by catalytically oxidizing propylene at vapor phase under high load conditions, the start-up meaning the step of increasing the propylene supply rate (loading) from the non-reacting condition to the prescribed reaction conditions. This process is characterized in that the propylene supply rate is increased in the start-up stage of the reaction until the prescribed composition of starting reactant gas and the flow rate of the starting reactant gas are obtained, while adjusting at least one of the reaction temperature, the composition of the starting reactant gas and flow rate of the starting reactant gas, so as to maintain the propylene conversion at not lower than 90 mol %, the maximum peak temperature of the catalyst layer in each reaction zone at no higher than 450° C., and the sum of each ΔT (maximum peak temperature of a catalyst layer—reaction temperature) at the catalyst layer in each of the reaction zones to be no more than 180° C., respectively. According to this process, the reaction speedily reaches the steady state (standard operating conditions) and a high acrolein and acrylic acid yield is stably achieved from the start of the reaction.
    • 本发明提供了在高负载条件下通过在气相下催化氧化丙烯来生产丙烯醛和丙烯酸的情况下的启动方法的改进,启动意味着将丙烯供应速率(负载)从 对规定的反应条件的非反应条件。 该方法的特征在于,在反应的启动阶段,丙烯供给速率增加,直到获得规定的起始反应气体组成和起始反应气体的流量,同时调节至少一个反应温度 ,起始反应物气体的组成和起始反应气体的流速,以保持丙烯转化率不低于90mol%,各反应区中催化剂层的最高峰值温度不高于450° C,以及每个反应区域中的催化剂层的每个&Dgr; T(催化剂层 - 反应温度的最大峰值温度)的总和分别不超过180℃。 根据该方法,反应快速达到稳定状态(标准操作条件),从反应开始就可以稳定地获得高丙烯醛和丙烯酸的收率。
    • 8. 发明申请
    • Process for producing acrylic acid
    • 丙烯酸生产工艺
    • US20100249454A1
    • 2010-09-30
    • US12659994
    • 2010-03-26
    • Michio TanimotoHideo Onodera
    • Michio TanimotoHideo Onodera
    • C07C51/235
    • C07C51/252C07C57/04
    • The invention offers an improvement in a process for start-up in the occasion of producing acrylic acid by catalytically oxidizing acrolein at vapor phase under high load conditions, the start-up meaning the step of increasing the acrolein supply rate (loading) from the non-reacting condition to the prescribed reaction conditions. This process is characterized in that the acrolein supply rate is increased in the start-up stage of the reaction until the prescribed composition of starting reactant gas and the flow rate of the starting reactant gas are obtained, while adjusting at least one of the reaction temperature, the composition of the starting reactant gas and the flow rate of the starting reactant gas, so as to maintain the acrolein conversion at not lower than 90 mol %, the maximum peak temperature of the catalyst layer in each reaction zone at no higher than 400° C., and the sum of each ΔT (maximum peak temperature of a catalyst layer-reaction temperature) at the catalyst layer in each of the reaction zones to be no more than 150° C., respectively. According to this process, the reaction speedily reaches the steady state (standard operating conditions) and a high acrylic acid yield is stably achieved from the start of the reaction.
    • 本发明提供了在高负载条件下通过在气相下催化氧化丙烯醛来生产丙烯酸的情况下的启动方法的改进,启动意味着提高丙烯醛供应速率(负载) 反应条件达到规定的反应条件。 该方法的特征在于,在反应开始阶段丙烯醛供应速率增加,直到获得规定的起始反应气体组成和起始反应气体的流量,同时调节至少一个反应温度 ,起始反应气体的组成和起始反应气体的流量,以使丙烯醛的转化率保持在不低于90mol%,催化剂层在每个反应区中的最大峰值温度不高于400℃ ℃,以及每个反应区域中的催化剂层的每个&Dgr; T(催化剂层 - 反应温度的最大峰值温度)的总和分别不超过150℃。 根据该方法,反应快速达到稳定状态(标准操作条件),从反应开始就稳定地得到高丙烯酸收率。