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:
Jun. 15, 2021
Filed:
Nov. 02, 2018
Dow Technology Investments Llc, Midland, MI (US);
Marinus A. Bigi, Pearland, TX (US);
Rick B. Watson, Missouri City, TX (US);
DOW TECHNOLOGY INVESTMENTS LLC, Midland, MI (US);
Abstract
Some embodiments of the present invention relate to processes to recover rhodium from a hydroformylation process. In some embodiments, the process to recover rhodium from the hydroformylation process comprises (a) treating a catalyst-containing stream from the hydroformylation process with 2.5 to 20 weight percent, based on the total weight of the stream, of a water-soluble organic amine of the following structure: wherein R, R, and Rare each independently alkyls and ethoxylates, and wherein no more than one of R, R, and Ris alkyl; (b) heating the resulting solution in the presence of syngas to a temperature of at least 65° C. to generate a rhodium-rich phase and a supernatant; and (c) removing the supernatant to recover the rhodium-rich phase.