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:
Nov. 05, 2019
Filed:
Sep. 28, 2017
Chevron Phillips Chemical Company Lp, The Woodlands, TX (US);
Steven M. Bischof, Humble, TX (US);
Jared T. Fern, Kingwood, TX (US);
Uriah J. Kilgore, Kingwood, TX (US);
Orson L. Sydora, Houston, TX (US);
Chevron Phillips Chemical Company LP, The Woodlands, TX (US);
Abstract
Disclosed are processes for oligomerizing ethylene by contacting a catalyst system, ethylene, and optionally hydrogen to form an oligomer product in a reaction zone, wherein the catalyst system comprises: a chromium component comprising an N-phosphinyl amidine chromium compound complex, an N-phosphinyl formamidine chromium compound complex, and/or an N-phosphinyl guanidine chromium compound complex, and an aluminoxane; wherein the aluminoxane is characterized by 400 MHz proton NMR in which: (a) the ratio of peaks found in the range of −0.86 ppm to −0.74 ppm to peaks found in a range of −0.03 ppm to 0.07 ppm is less than or equal to 2.8:1; (b) the ratio of peaks found in the range of −0.03 ppm to 0.025 ppm to peaks found in a range of 0.025 ppm to 0.07 ppm is less than or equal to 15:1; and/or (c) the ratio of peaks found in a range of −0.86 ppm to −0.78 ppm to peaks found in the range of −0.78 ppm to −0.74 ppm is less than or equal to 6.5:1.