Exxonmobil Chemical Patents Inc.

Chevron Phillips Chemical Company LP

Baiyi Zhao

Jo Ann Marie Canich

Smita Kacker

Enock Berluche

Tin-Tack Peter Cheung

Scott H Brown

Daniel P Hagewiesche

Kevin Richard Squire

Donald N Schulz

Lisa Saunders Baugh

Michael Paviovich Bubnov

Nikolay Olegovich Druzhkov

Valentina Nikolavena Glushakova

Irina Alexandrovna Teplova

Nina Aleksandrovna Skorodumova

Gleb Arsent′evich Abakumov

Vladimir Kuzunich Cherkasov

Cynthia A Ballinger

A method of extending the life of an aromatization catalyst comprising identifying a rapid deactivation threshold (RDT) of the catalyst, and oxidizing the catalyst prior to reaching the RDT. A method of aromatizing a hydrocarbon comprising identifying a rapid deactivation threshold (RDT) for an aromatization catalyst, and operating an aromatization reactor comprising the catalyst to extend the Time on Stream of the reactor prior to reaching the RDT. A method of extending the life of an aromatization catalyst comprising predicting a rapid deactivation threshold (RDT) for an aromatization reactor by employing the catalyst in a reactor system under an accelerated fouling condition to identify a test rapid deactivation threshold (t-RDT), predicting the RDT for the aromatization reactor based upon the t-RDT, and oxidizing the catalyst prior to the predicted RDT to extend the Time on Stream of the aromatization catalyst.

Extending the life of an aromatization catalyst

This invention relates to a series of novel late transition metal catalysts for olefin oligomerization, the catalysts demonstrating high activity and selectivity for linear &#x3b1;-olefins. The catalysts contain a Group-8, -9, or -10 transition metal, M, excluding palladium; an ancillary ligand comprising: a terminal amine comprising two independently selected hydrocarbyl radicals, Rand R; a terminal phosphine comprising two independently selected hydrocarbyl radicals, Rand R; and a hydrocarbyl bridge, Y, comprising a backbone wherein the hydrocarbyl bridge connects between the terminal amine and the terminal phosphine and wherein the backbone comprises a chain that is four or more carbon atoms long; and an abstractable ligand, X. For example this invention relates to a composition of matter with the following formula: wherein M, R, R, R, and R, Y, and X are as defined above.

Late transition metal catalysts for olefin oligomerizations

A method of extending the life of an aromatization catalyst comprising identifying a rapid deactivation threshold (RDT) of the catalyst, and oxidizing the catalyst prior to reaching the RDT. A method of aromatizing a hydrocarbon comprising identifying a rapid deactivation threshold (RDT) for an aromatization catalyst, and operating an aromatization reactor comprising the catalyst to extend the Time on Stream of the reactor prior to reaching the RDT. A method of characterizing an aromatization catalyst comprising identifying a rapid deactivation threshold (RDT) of the catalyst. A method of extending the life of an aromatization catalyst comprising predicting a rapid deactivation threshold (RDT) for an aromatization reactor by employing the catalyst in a reactor system under an accelerated fouling condition to identify a test rapid deactivation threshold (t-RDT), predicting the RDT for the aromatization reactor based upon the t-RDT, and oxidizing the catalyst prior to the predicted RDT to extend the Time on Stream of the aromatization catalyst.

A series of novel late transition metal catalysts for olefin oligomerization have been invented. The catalysts demonstrate high activity and selectivity for linear &#x3b1;-olefins.

As series of novel late transition metal catalysts for olefin oligomerization have been invented. The catalyst system includes a Group 8, 9 or 10 transition metal and an activator. The catalysts demonstrate high activity and selectivity for linear &#x3b1;-olefins. Preferably this invention relates to a catalyst system comprising the reaction product of: (a) an activator selected from the group consisting of alumoxane, aluminum alkyl, alkyl aluminum halide, alkylaluminum alkoxide, discrete ionic activator, and Lewis acid; and (b) a catalyst precursor wherein the catalyst precursor has the following formula: wherein (i) M is a Group-8, -9 , or -10 transition metal; (ii) N is nitrogen (iii) P is phosphorus; (iv) R, R, R, and Rare independently hydrocarbyl radicals; (v) Y is a hydrocarbyl bridge comprising a backbone wherein the backbone comprises a chain that is four or more carbon atoms long; (vi) X are independently abstractable ligands.

A This invention relates to a composition comprising a catecholate ligand, palladium or nickel, and an ancillary ligand with the following structure: where Pn is a Group-15 element; H is hydrogen; Rand Rare independently hydrogen or C-Chydrocarbyl radicals, or both are C-Chydrocarbyl radicals that form a ring structure comprising one or more aromatic or non-aromatic rings; and R-Rare, independently, hydrogen or C-Chydrocarbyl radicals. The composition can be used to oligomerize ethylene.

Soluble late transition metal catalysts for olefin oligomerizations III

This invention relates to a transition metal compound represented by the formula LMX wherein M is a Group 3 to 11 metal L is a bulky bidentate or tridentate neutral ligand that is bonded to M by two or three heteroatoms and at least one heteroatom is nitrogen; X is a substituted or unsubstituted catecholate ligand provided that the substituted catecholate ligand does not contain a 1,2-diketone functionality.

Late transition metal catalysts for olefin polymerization and oligomerization

This invention relates to late transition metal catalyst precursors and catalysts for olefin dimerizations and oligomerizations, and to methods for making and using these catalysts.

Soluble group-10 &#x3b1;-diimine catalyst precursors, catalysts and methods for dimerizing and oligomerizing olefins

A series of soluble &#x3b1;-diimine late transition metal catalysts has been invented. The catalysts demonstrate high activity and selectivity for linear &#x3b1;-olefins. As such, these catalysts conveniently oligomerize ethylene. Typical activators as known to those of ordinary skill in the art are used to activate these transition metal catalyst. These catalysts can be used in a supported or unsupported form.

Soluble late transition metal catalysts for olefin oligomerizations II

A series of soluble &#x3b1;-diimine late transition metal catalysts has been invented comprising a substituted or unsubstituted catecholate ligand. The catalysts demonstrate high activity and selectivity for linear &#x3b1;-olefins. As such, these catalysts conveniently oligomerize ethylene. Typical activators as known to those of ordinary skill in the art are used to activate these transition metal catalysts. These catalysts can be used in a supported or unsupported form.

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Kingwood, TX, United States of America

Baiyi Zhao