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METHODS FOR SLOWING DEACTIVATION OF A CATALYST AND/OR SLOWING TETRAPHOSPHINE LIGAND USAGE IN HYDROFORMYLATION PROCESSES
METHODS FOR SLOWING DEACTIVATION OF A CATALYST AND/OR SLOWING TETRAPHOSPHINE LIGAND USAGE IN HYDROFORMYLATION PROCESSES
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机译:在加氢甲酰化过程中减慢催化剂失活率和/或减缓四磷酸配体使用的方法
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摘要
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.
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