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:
Jan. 03, 2017
Filed:
May. 06, 2014
Sasol Technology (Proprietary) Limited, Rosebank, ZA;
Moses Mokgolela Mogorosi, Sasolburg, ZA;
Munaka Christopher Maumela, Sasolburg, ZA;
Matthew James Overett, Johannesburg, ZA;
Sasol Technology (Proprietary) Limited, Rosebank, ZA;
Abstract
A process for the oligomerization, preferably the tetramerization, of ethylene to predominantly 1-hexene or 1-octene or mixtures of 1-hexene and 1-octene includes contacting ethylene with a catalyst under ethylene oligomerization conditions. The catalyst comprises a source of chromium, a diphosphine ligating compound, and optionally an activator. The diphosphine ligating compound includes at least one substituted aromatic ring bonded to a phosphorous atom. The substituted aromatic ring is substituted at a ring atom adjacent to the ring atom bonded to the respective phosphorous atom with a group Y, where Y is of the form —AR, A being O, S or NR, where Ris a hydrocarbyl, heterohydrocarbyl or organoheteryl group, and Ris an electron withdrawing group.