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:
Dec. 03, 2013
Filed:
Dec. 15, 2010
Thomas C. Eisenschmid, Cross Lanes, WV (US);
Jeffrey S. Sawrey, Westford, MA (US);
Glenn A. Miller, South Charleston, WV (US);
Michael A. Brammer, Lake Jackson, TX (US);
Thomas C. Eisenschmid, Cross Lanes, WV (US);
Jeffrey S. Sawrey, Westford, MA (US);
Glenn A. Miller, South Charleston, WV (US);
Michael A. Brammer, Lake Jackson, TX (US);
Dow Technology Investments LLC, Midland, MI (US);
Abstract
A method of controlling an in-series, multiple, e.g., two, reaction zone, hydroformylation process for producing normal (N) and iso (I) aldehydes at a N:I ratio, the process comprising contacting an olefinically unsaturated compound with synthesis gas and a catalyst comprising (A) a transition metal, e.g., rhodium, (B) an organobisphosphite ligand, and (C) an organomonophosphite ligand, the contacting conducted in first and subsequent reaction zone(s) and at hydroformylation conditions comprising a transition metal concentration in each zone, the method comprising decreasing the transition metal concentration in the first reaction zone to decrease the N:I ratio or increasing the transition metal concentration in the first reaction zone to increase the N:I ratio.