Methods for slowing deactivation of a catalyst and/or slowing tetraphosphine ligand usage in hydroformylation processes
申请人:Dow Technology Investments LLC
公开号:US11130725B2
公开(公告)日:2021-09-28
The present invention relates to methods for slowing deactivation of a catalyst and/or slowing tetraphosphine ligand usage in a hydroformylation process. In one aspect, a method comprises (a) contacting an olefin with carbon monoxide, hydrogen and a catalyst, the catalyst comprising (A) a transition metal, (B) a tetraphosphine having the structure described herein, and, optionally, (C) a monophosphine having the structure described herein, the contacting conducted in one or more reaction zones and at hydroformylation conditions; and (b) adding additional monophosphine having the structure described herein to a reaction zone.
本发明涉及在加氢甲酰化过程中减缓催化剂失活和/或减缓四膦配体使用的方法。在一个方面,方法包括 (a) 使烯烃与一氧化碳、氢气和催化剂接触,催化剂包括 (A) 过渡金属,(B) 具有本文所述结构的四膦,以及可选地,(C) 具有本文所述结构的一膦,接触在一个或多个反应区和加氢甲酰化条件下进行;以及 (b) 向反应区添加额外的具有本文所述结构的一膦。