Patents by Inventor Matthew James Overett
Matthew James Overett has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9546117Abstract: A process for the tetramerization of ethylene includes contacting ethylene with a catalyst under ethylene oligomerization conditions. The catalyst comprises a source of chromium, a ligating compound, and an activator. The ligating compound includes a phosphine that forms part of a cyclic structure.Type: GrantFiled: May 6, 2014Date of Patent: January 17, 2017Assignee: Sasol Technology (Proprietary) LimitedInventors: Molise Stephen Mokhadinyana, Munaka Christopher Maumela, Moses Mokgolela Mogorosi, Matthew James Overett, Jan-Albert Van Den Berg, Werner Janse Van Rensburg, Kevin Blann
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Patent number: 9533923Abstract: 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 —AREWG, A being O, S or NR5, where R5 is a hydrocarbyl, heterohydrocarbyl or organoheteryl group, and REWG is an electron withdrawing group.Type: GrantFiled: May 6, 2014Date of Patent: January 3, 2017Assignee: Sasol Technology (Proprietary) LimitedInventors: Moses Mokgolela Mogorosi, Munaka Christopher Maumela, Matthew James Overett
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Patent number: 9533922Abstract: A process for the oligomerization 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 optionally substituted fused cyclic structure including at least two rings, the optionally substituted fused cyclic structure including a 5- to 7-membered aromatic first ring bonded to a phosphorus atom, the aromatic first ring being fused to a 4- to 8-membered heterocyclic second ring, the heterocyclic second ring including a heteroatom which is separated by two ring atoms along the shortest connecting path from the phosphorous atom that is bonded to the first aromatic ring.Type: GrantFiled: May 6, 2014Date of Patent: January 3, 2017Assignee: Sasol Technology (Proprietary) LimitedInventors: Munaka Christopher Maumela, Moses Mokgolela Mogorosi, Molise Stephen Mokhadinyana, Matthew James Overett, Kevin Blann, Cedric Wahl Holzapfel
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Patent number: 9522856Abstract: A process (10) for oligomerising a hydrocarbon to form at least one co-monomer product (22) includes feeding a hydrocarbon reactant and organic liquid diluent solvent (32) into an oligomerisation reactor (12). The organic liquid diluent solvent has a normal boiling point below the normal boiling point of 1-hexene but above ?20° C., or the organic diluent solvent is in the form of a solvent admixture with at least 70% by mass of the solvent admixture constituting organic diluent solvents having a normal boiling point below the normal boiling point of 1-hexene but above ?20° C. The oligomerisation reactor (12) holds at least one co-monomer product formed in the oligomerisation reactor admixed with a catalyst system (25) introduced into the oligomerisation reactor (12). The catalyst system (25) includes a catalyst dissolved in at least one catalyst solvent.Type: GrantFiled: May 8, 2013Date of Patent: December 20, 2016Assignee: SASOL TECHNOLOGY (PROPRIETARY) LIMITEDInventors: Denise Louisette Venter, Kenny Tenza, Palesa Nongodlwana, Matthew James Overett, Kevin Blann, Nicolaus Ladislaus Stark, Craig McGregor, Richard Neil Walsh
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Patent number: 9499456Abstract: A process for the tetramerisation of ethylene under solution phase conditions is carried out in the presence of an activated catalyst at a temperature above 80° C. and up to a temperature of about 115° C. The activated catalyst is provided by combining a source of chromium, a diphosphine ligating compound and optionally a catalyst activator or combination of catalyst activators. The process forms at least 30% 1-octene and a polyethylene co-product that, together with any other reaction products, remains substantially dissolved in the liquid phase. The polyethylene co-product has a weight average molecular weight (Mw) of less than 200 000 g/mol, a number average molecular weight (Mn) of less than 3 000 g/mol, and a melt flow index of more than 20 g/10 minutes.Type: GrantFiled: May 8, 2013Date of Patent: November 22, 2016Assignee: SASOL TECHNOLOGY (PROPRIETARY) LIMITEDInventors: Matthew James Overett, Elzet Grobler, Stephen John Evans, Kevin Blann
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Patent number: 9487456Abstract: A process for the tetramerisation of ethylene under solution phase conditions is carried out in the presence of an activated catalyst at a temperature above 80° C. and up to a temperature of about 130° C. The activated catalyst is provided by combining a source of chromium, a ligating compound, which ligating compound includes at least one fluorine substituted hydrocarbyl group, organoheteryl group, or heterohydrocarbyl group, and optionally a catalyst activator or combination of catalyst activators.Type: GrantFiled: May 8, 2013Date of Patent: November 8, 2016Assignee: SASOL TECHNOLOGY (PROPRIETARY) LIMITEDInventors: Matthew James Overett, Munaka Christopher Maumela, Moses Mokgolela Mogorosi, Hulisani Maumela, Molise Stephen Mokhadinyana
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Publication number: 20160083311Abstract: A process for the oligomerisation 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 oligomerisation conditions. The catalyst comprises a source of chromium, a diphosphine ligating compound, and optionally an activator. The diphosphine ligating compound includes at least one optionally substituted fused cyclic structure including at least two rings, the optionally substituted fused cyclic structure including a 5- to 7-membered aromatic first ring bonded to a phosphorus atom, the aromatic first ring being fused to a 4- to 8-membered heterocyclic second ring, the heterocyclic second ring including a heteroatom which is separated by two ring atoms along the shortest connecting path from the phosphorous atom that is bonded to the first aromatic ring.Type: ApplicationFiled: May 6, 2014Publication date: March 24, 2016Applicant: SASOL TECHNOLOGY (PROPRIETARY LIMITED)Inventors: Munaka Christopher MAUMELA, Moses Mokgolela MOGOROSI, Molise Stephen MOKHADINYANA, Matthew James OVERETT, Kevin BLANN, Cedric Wahl HOLZAPFEL
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Publication number: 20160083312Abstract: A process for the oligomerisation, preferably the tetramerisation, 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 oiigomerisation 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 —AREWG, A being O, S or NR5, where R5 is a hydrocarbyl, heterohydrocarbyl or organoheteryl group, and REWG is an electron withdrawing group.Type: ApplicationFiled: May 6, 2014Publication date: March 24, 2016Inventors: Moses Mokgolela MOGOROSI, Munaka Christopher MAUMELA, Matthew James OVERETT
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Publication number: 20160075616Abstract: A process for the tetramerisation of ethylene includes contacting ethylene with a catalyst under ethylene oligomerisation conditions. The catalyst comprises a source of chromium, a ligating compound, and an activator. The ligating compound includes a phosphine that forms part of a cyclic structure.Type: ApplicationFiled: May 6, 2014Publication date: March 17, 2016Inventors: Molise Stephen MOKHADINYANA, Munaka Christopher MAUMELA, Moses Mokgolela MOGOROSI, Matthew James OVERETT, Jan-Albert VAN DEN BERG, Werner JANSE VAN RENSBURG, Kevin BLANN
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Publication number: 20150126790Abstract: A process (10) for oligomerising a hydrocarbon to form at least one co-monomer product (22) includes feeding a hydrocarbon reactant and organic liquid diluent solvent (32) into an oligomerisation reactor (12). The organic liquid diluent solvent has a normal boiling point below the normal boiling point of 1-hexene but above ?20° C., or the organic diluent solvent is in the form of a solvent admixture with at least 70% by mass of the solvent admixture constituting organic diluent solvents having a normal boiling point below the normal boiling point of 1-hexene but above ?20° C. The oligomerisation reactor (12) holds at least one co-monomer product formed in the oligomerisation reactor admixed with a catalyst system (25) introduced into the oligomerisation reactor (12). The catalyst system (25) includes a catalyst dissolved in at least one catalyst solvent.Type: ApplicationFiled: May 8, 2013Publication date: May 7, 2015Inventors: Denise Louisette Venter, Kenny Tenza, Palesa Nongodlwana, Matthew James Overett, Kevin Blann, Nicolaus Ladislaus Stark, Craig McGregor, Richard Neil Walsh
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Publication number: 20150087873Abstract: A process for the tetramerisation of ethylene under solution phase conditions is carried out in the presence of an activated catalyst at a temperature above 80° C. and up to a temperature of about 130° C. The activated catalyst is provided by combining a source of chromium, a ligating compound, which ligating compound includes at least one fluorine substituted hydrocarbyl group, organoheteryl group, or heterohydrocarbyl group, and optionally a catalyst activator or combination of catalyst activators.Type: ApplicationFiled: May 8, 2013Publication date: March 26, 2015Inventors: Matthew James Overett, Munaka Christopher Maumela, Moses Mokgolela Mogorosi, Hulisani Maumela, Molise Stephen Mokhadinyana
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Publication number: 20150080629Abstract: A process for the tetramerisation of ethylene under solution phase conditions is carried out in the presence of an activated catalyst at a temperature above 80° C. and up to a temperature of about 115° C. The activated catalyst is provided by combining a source of chromium, a diphosphine ligating compound and optionally a catalyst activator or combination of catalyst activators. The process forms at least 30% 1-octene and a polyethylene co-product that, together with any other reaction products, remains substantially dissolved in the liquid phase. The polyethylene co-product has a weight average molecular weight (Mw) of less than 200 000 g/mol, a number average molecular weight (Mn) of less than 3 000 g/mol, and a melt flow index of more than 20 g/10 minutes.Type: ApplicationFiled: May 8, 2013Publication date: March 19, 2015Inventors: Matthew James Overett, Elzet Grobler, Stephen John Evans, Kevin Blann
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Patent number: 8461406Abstract: According to the present invention there is provided a process for producing an oligomeric product by the oligomerisation of at least one olefinic compound including: A) providing an activated oligomerisation catalyst comprising the combination of: i) a source of a transition metal; ii) a ligating compound of the formula (R1)mX1(Y)X2(R2)n iii) a metal containing activator; and (iv) at least one olefinic compound; B) diluting the activated oligomerisation catalyst of A with an introduced liquid medium; and C) contacting the at least one olefinic compound to be oligomerised with the diluted activated catalyst of B to produce an oligomeric product.Type: GrantFiled: July 10, 2006Date of Patent: June 11, 2013Assignee: Sasol Technology (PTY) LimitedInventors: Matthew James Overett, Kevin Blann, Esna Killian, David Hedley Morgan, Hulisani Maumela, Annette Bollmann, John Thomas Dixon
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Patent number: 7964763Abstract: This invention relates to a process for producing an oligomeric product by the oligomerization of at least one olefinic compound by contacting the at least one olefinic compound with an oligomerization catalyst in an aliphatic liquid medium at a reaction temperature of at least 50° C. The catalyst comprises the combination of a source of a transition metal; and a ligating compound of the formula (R1)m X1 (Y) X2 (R2)m.Type: GrantFiled: June 13, 2005Date of Patent: June 21, 2011Assignee: Sasol Technology (Pty) LimitedInventors: John Thomas Dixon, Esna Killian, Annette Bollmann, Richard Neil Walsh, Matthew James Overett, Kevin Blann, David Hedley Morgan
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Publication number: 20110086991Abstract: This invention relates to a process for producing an oligomeric product by the oligomerisation of at least one olefinic compound by contacting the at least one olefinic compound with an oligomerisation catalyst in an aliphatic liquid medium at a reaction temperature of at least 50° C. The catalyst comprises the combination of a source of a transition metal; and a ligating compound of the formula (R1)mX1(Y)X2(R2)n.Type: ApplicationFiled: June 13, 2005Publication date: April 14, 2011Inventors: John Thomas Dixon, Esna Killian, Annette Bollmann, Richard Neil Walsh, Matthew James Overett, Kevin Blann, David Hedley Morgan
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Publication number: 20100222622Abstract: According to the present invention there is provided a process for producing an oligomeric product by the oligomerisation of at least one olefinic compound including: A) providing an activated oligomerisation catalyst comprising the combination of: i) a source of a transition metal; ii) a ligating compound of the formula (R1)mX1(Y)X2(R2)n iii) a metal containing activator; and (iv) at least one olefinic compound; B) diluting the activated oligomerisation catalyst of A with an introduced liquid medium; and C) contacting the at least one olefinic compound to be oligomerised with the diluted activated catalyst of B to produce an oligomeric product.Type: ApplicationFiled: July 10, 2006Publication date: September 2, 2010Inventors: Matthew James Overett, Kevin Blann, Esna Killian, David Hedley Morgan, Hulisani Maumela, Annette Bollmann, John Thomas Dixon
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Publication number: 20090306442Abstract: This invention relates to a process for producing an oligomeric product by the oligomerisation of at least one olefinic compound in the form of an olefin or a compound including a carbon to carbon double bond, by contacting the at least one olefinic compound with an oligomerisation catalyst which includes the combination of a source of a transition metal, and a ligating compound of the formula (R1)mX1(Y)X2(R2)n.Type: ApplicationFiled: May 28, 2007Publication date: December 10, 2009Applicant: SASOL TECHNOLOGY (PTY) LIMITEDInventors: Marié Pretorius, Annette Bollmann, Kevin Blann, Matthew James Overett
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Patent number: 7525009Abstract: The invention describes a process for trimerisation olefins, which process includes the step of contacting an olefinic feedstream with a catalyst system which includes a transition metal compound and a heteroatomic ligand and wherein the trimer is an olefin and wherein the heteroatomic ligand is described by the following general formula (R)nA-B-C(R)m.Type: GrantFiled: December 19, 2003Date of Patent: April 28, 2009Assignee: Sasol Technology (Pty) LimitedInventors: Kevin Blann, Annette Bollmann, John Thomas Dixon, Arno Neveling, David Hedley Morgan, Hulisani Maumela, Esna Killian, Fiona Millicent Hess, Stefanus Otto, Matthew James Overett
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Patent number: 7511183Abstract: The invention describes a process for tetramerisation of olefins wherein the product stream of the process contains more than 30% of the tetramer olefin. The process includes the step of contacting an olefinic feedstream with a catalyst system containing a transition metal compound and a heteroatomic ligand.Type: GrantFiled: December 19, 2003Date of Patent: March 31, 2009Assignee: Sasol Technology (PTY) LimitedInventors: Kevin Blann, Annette Bollmann, John Thomas Dixon, Arno Neveling, David Hedley Morgan, Hulisani Maumela, Esna Killian, Fiona Millicent Hess, Stefanus Otto, Lana Pepler, Hamdani Ahmed Mahomed, Matthew James Overett
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Patent number: 7297832Abstract: The invention describes a process for tetramerisation of olefins wherein the product stream of the process contains more than 30% of the tetramer olefin. The process includes the step of contacting an olefinic feedstream with a catalyst system containing a transition metal compound and a heteroatomic ligand.Type: GrantFiled: December 19, 2003Date of Patent: November 20, 2007Assignee: Sasol Technology (PTY) LimitedInventors: Kevin Blann, Annette Bollmann, John Thomas Dixon, Arno Neveling, David Hedley Morgan, Hulisani Maumela, Esna Killian, Fiona Millicent Hess, Stefanus Otto, Matthew James Overett, Michael James Green