Hancsók, Jenő; Tomasek, Szabina; Miskolczi, Norbert; Horváth, Dániel Zoltán; Valyon, József; Tuba, Róbert; Lónyi, Ferenc; Nagyházi, Márton; Vikár, Anna; Balla, Áron
2023. 08. 24. WO2023156802A1
Abstract
Our invention relates to catalysts and their use in the synthesis and conversion of alpha-olefin-containing products, essentially alpha-olefins, primarily from paraffins of renewable origin, having a carbon number of 11-45, and mixtures thereof, which mixtures contain paraffins having a carbon number of 11-45. The main steps of the process are the heterogeneous catalytic dehydrogenation of paraffin with a new zeolite -supported catalyst based on Pt, Pd or Ni, and then the conversion of the resulting olefin-containing product mixture, containing mainly straight-chain internal monoolefins, to lower homologous alpha-olefins - namely, the homogeneous or heterogeneous catalytic ethenolysis by using a ruthenium complex metathesis catalyst (i.e., metathesis using excess ethylene or ethylene metathesis), and/or tandem isomerization and metathesis reactions by using homogeneous or heterogenized homogeneous ruthenium complex metathesis catalyst in combination with a homogeneous or heterogeneous olefin isomerization catalyst (i.e., isomerization metathesis, hereinafter referred to as ISOMET), and/or tandem isomerization and ethylene metathesis by using a homogeneous or heterogenized homogeneous ruthenium complex metathesis catalyst in combination with homogeneous or heterogeneous olefin isomerization catalyst (i.e., isomerization ethylene metathesis, hereinafter referred to as ethylene ISOMET).
Hassan S. Bazzi, Mohammed Al-Hashimi, Robert Tuba
2020. 07. 09. US20200216604A1
Abstract
A polypentenamer-silica composite can include a surface-modified silica compound and a polypentenamer chain grafted onto the surface-modified silica compound. The polypentenamer has physical properties similar to natural rubber. The polypentenamer-silica composite is recyclable. As such, the polypentenamer-silica composite can be used for manufacturing recyclable tires.
Robert Tuba, Robert H. Grubbs
2020. 04. 14. US10619003B2
Abstract
This invention relates to methods and compositions for preparing linear and cyclic polyolefins. More particularly, the invention relates to methods and compositions for pre paring functionalized linear and cyclic polyolefins via olefin metathesis reactions. Polymer products produced via the olefin metathesis reactions of the invention may be utilized for a wide range of materials applications. The invention has utility in the fields of polymer and materials chemistry and manufacture.
John Gladysz, Christine Hahn, Robert Tuba, Abbas Razavi
2009. 08. 13. US20090203948A1Abstract
The present invention relates to the field of catalyst systems based on new single site catalyst components with a metal containing chelate backbone. These complexes are suitable for the oligomerisation of olefins.