申请人:Ball George A.
公开号:US20110108763A1
公开(公告)日:2011-05-12
Various embodiments of the invention herein described generally relate to novel processes for the production of aromatic acids by fixed bed catalytic oxidation of aromatic compounds carrying at least one oxidizable substituent group attached directly to the carbon atom of the corresponding aromatic nucleus. In an embodiment, a novel oxidation process of the present invention comprises the steps of: a) catalytically oxidizing, with an oxidation catalyst, a liquid phase aromatic acid precursor in the presence of a gaseous oxygen source; b) separating a finished product; c) purging the solvent and the oxidation catalyst; d) optionally recycling at least a portion of the solvent into the oxidation reactor; e) recovering at least a portion of the oxidation catalyst; f) recharging the at least a portion of the oxidation catalyst over a solid recharging catalyst bed; and (g) feeding a reactivated oxidation catalyst to the oxidation reactor.
本发明的各种实施例通常涉及通过固定床催化氧化芳香族化合物来生产芳香族酸的新工艺,所述芳香族化合物带有至少一个可氧化取代基,该取代基直接连接到相应芳香族核的碳原子上。在一种实施例中,本发明的新氧化工艺包括以下步骤:a)在氧化催化剂的存在下,在气态氧源的存在下,催化氧化液相芳香族酸前体;b)分离成品;c)清除溶剂和氧化催化剂;d)可选地将至少一部分溶剂循环回氧化反应器;e)回收至少一部分氧化催化剂;f)将至少一部分氧化催化剂在固体充电催化剂床上重新充电;g)将再生的氧化催化剂送入氧化反应器。