The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 31, 2022
Filed:
May. 03, 2019
Dow Technology Investments Llc, Midland, MI (US);
Michael A. Brammer, Freeport, TX (US);
Huifeng Qian, Pearland, TX (US);
Dow Technology Investments LLC, Midland, MI (US);
Abstract
The present invention relates to methods of controlling hydroformylation processes for producing normal (N) and iso (I) aldehydes at a N:I ratio. In one aspect, a method of controlling a hydroformylation process comprises contacting an olefin with carbon monoxide, hydrogen and a catalyst, the catalyst comprising (A) a transition metal, (B) a monophosphine, and (C) a tetraphosphine having the structure described herein, the contacting conducted in one or more reaction zones and at hydroformylation conditions to produce a blend of normal (N) and iso (I) aldehydes at a N:I ratio, the method comprising at least one of increasing the N:I ratio by adding additional tetraphosphine to a reaction zone; decreasing the N:I ratio by adding additional monophosphine to a reaction zone; or increasing the N:I ratio by volatilization of the free monophosphine.