Patents by Inventor Mark Stephen Roberts
Mark Stephen Roberts 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: 8624054Abstract: A process for the production of methyl acetate by reacting dimethyl ether with carbon monoxide into a carbonylation reactor containing a mordenite catalyst in the presence of added methyl acetate and/or acetic acid.Type: GrantFiled: November 19, 2009Date of Patent: January 7, 2014Assignee: BP Chemicals LimitedInventors: Nicholas John Hazel, Lesley Ann Key, Mark Stephen Roberts, John Glenn Sunley
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Patent number: 8552216Abstract: Process for the production of methyl acetate by carbonylating a dimethyl ether feed with carbon monoxide under substantially anhydrous conditions, in the presence of a zeolite catalyst effective for the carbonylation. The carbonylation is carried out at a temperature in the range of 275 to 350° C. and in the presence of hydrogen.Type: GrantFiled: April 23, 2008Date of Patent: October 8, 2013Assignee: BP Chemicals LimitedInventors: Jon Michael Stewart Deeley, Evert Jan Ditzel, David John Law, Mark Stephen Roberts, John Glenn Sunley
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Patent number: 8394983Abstract: Process for the production of methyl acetate by the carbonylation of a dimethyl ether feed with carbon monoxide under substantially anhydrous conditions, in the presence of a zeolite catalyst effective for the carbonylation. The carbonylation is carried out at a temperature in the range of greater than 250° C. to 350° C. and at a pressure in the range of greater than 10 barg to 100 barg.Type: GrantFiled: April 23, 2008Date of Patent: March 12, 2013Assignee: BP Chemicals LimitedInventors: Evert Jan Ditzel, David John Law, Mark Stephen Roberts
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Patent number: 8329606Abstract: Process for the in-situ regeneration of a zeolite catalyst in a carbonylation process for the production of at least one of methyl acetate and acetic acid. The process is carried out by (a) contacting a carbonylatable reactant selected from methanol, dimethyl ether and dimethyl carbonate and carbon monoxide in a reactor with a zeolite catalyst and recovering a product stream containing at least one of methyl acetate and acetic acid from the reactor, (b) ceasing contact of the catalyst with the carbonylatable reactant, (c) regenerating the catalyst with a regenerating gas selected from hydrogen or a mixture of hydrogen and carbon monoxide at a temperature in the range 250 to 600 C, and (d) terminating the hydrogen regenerating step and resuming contact of the catalyst with the carbonylatable reactant and carbon monoxide.Type: GrantFiled: December 16, 2008Date of Patent: December 11, 2012Assignee: BP Chemicals LimitedInventors: Edo Johann Becker, Evert Jan Ditzel, Harry Kaiser, George Ernest Morris, Mark Stephen Roberts, Stephan Andreas Schunk, Martin Smit, John Glenn Sunley
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Patent number: 8158815Abstract: A process for the carbonylation of dimethyl ether, dimethyl carbonate and/or methanol with carbon monoxide and hydrogen in the presence of a mordenite catalyst to produce at least one of acetic acid and methyl acetate in which process the mordenite catalyst is regenerated in-situ by contacting the catalyst with a regenerating gas comprising a molecular oxygen-containing gas and an inert diluent at a total pressure in the range 1 to 100 bar and wherein the partial pressure of the molecular oxygen-containing gas is such that the temperature of the catalyst is maintained within the range 225 to 325° C.Type: GrantFiled: December 16, 2008Date of Patent: April 17, 2012Assignee: BP Chemicals LimitedInventors: Evert Jan Ditzel, David John Law, George Ernest Morris, Mark Stephen Roberts, Stephan Andreas Schunk, Martin Smit, John Glenn Sunley
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Publication number: 20110319654Abstract: A process for the production of methyl acetate by reacting dimethyl ether with carbon monoxide into a carbonylation reactor containing a mordenite catalyst in the presence of added methyl acetate and/or acetic acid.Type: ApplicationFiled: November 19, 2009Publication date: December 29, 2011Inventors: Nicholas John Hazel, Lesley Ann Key, Mark Stephen Roberts, John Glenn Sunley
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Publication number: 20100317888Abstract: A process for the carbonylation of dimethyl ether, dimethyl carbonate and/or methanol with carbon monoxide and hydrogen in the presence of a mordenite catalyst to produce at least one of acetic acid and methyl acetate in which process the mordenite catalyst is regenerated in-situ by contacting the catalyst with a regenerating gas comprising a molecular oxygen-containing gas and an inert diluent at a total pressure in the range 1 to 100 bar and wherein the partial pressure of the molecular oxygen-containing gas is such that the temperature of the catalyst is maintained within the range 225 to 325° C.Type: ApplicationFiled: December 16, 2008Publication date: December 16, 2010Applicant: BP Chemicals LimitedInventors: Evert Jan Ditzel, David John Law, George Ernest Morris, Mark Stephen Roberts, Stephan Andreas Schunk, Martin Smit, John Glenn Sunley
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Publication number: 20100311567Abstract: A process for the in-situ regeneration of a zeolite catalyst in a carbonylation process for the production of at least one of methyl acetate and acetic acid by contacting methanol, dimethyl ethyl or dimethyl carbonate with carbon monoxide in the presence of a zeolite catalyst, ceasing contact of the catalyst with the reactant, regenerating the catalyst with a regenerating gas selected from hydrogen or a mixture of hydrogen and carbon monoxide at a temperature in the range 250 to 600° C., terminating the hydrogen regenerating step and resuming contact of the catalyst with the reactant and carbon monoxide.Type: ApplicationFiled: December 16, 2008Publication date: December 9, 2010Inventors: Edo Johann Becker, Evert Jan Ditzel, Harry Kaiser, George Ernest Morris, Mark Stephen Roberts, Stephen Andreas Schunk, Martin Smit, John Glenn Sunley
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Publication number: 20100130771Abstract: Production of methyl acetate by carbonylating a dimethyl ether feed with carbon monoxide under substantially anhydrous conditions, in the presence of a zeolite catalyst at a temperature in the range of greater than 250° C. to 350° C. and at a pressure in the range greater than 10 barg to 100 barg.Type: ApplicationFiled: April 23, 2008Publication date: May 27, 2010Applicant: BP Chemicals LimitedInventors: Evert Jan Ditzel, David John Law, Mark Stephen Roberts
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Publication number: 20100121099Abstract: Production of methyl acetate by carbonylating a dimethyl ether feed with carbon monoxide under substantially anhydrous conditions, in the presence of a zeolite catalyst at a temperature in the range 240° C. to 350° C. and in the presence of hydrogen.Type: ApplicationFiled: April 23, 2008Publication date: May 13, 2010Inventors: Jon Michael Stewart Deeley, Evert Jan Ditzel, David John Law, Mark Stephen Roberts, John Glenn Sunley
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Patent number: 7390918Abstract: An integrated process for the production of an alkenyl carboxylate, such as vinyl acetate which process comprises the steps of (a) contacting in an oxidation reaction zone a C2 to C4 alkane, such as ethane, a molecular oxygen-containing gas, optionally the corresponding alkene and optionally water, in the presence of a catalyst to produce a stream comprising alkene, carboxylic acid and water; (b) separating at least a portion of the stream from step (a) into a fraction comprising the alkene and a fraction comprising the carboxylic acid and water; (c) contacting in a second reaction zone at least a portion of said alkene fraction produced in step (b), a carboxylic acid and a molecular oxygen-containing gas, in the presence of a catalyst to produce a product stream comprising an alkenyl carboxylate, water and carboxylic acid; (d) separating at least a portion of the product stream from step (c) and at least a portion of the carboxylic acid and water fraction produced in step (b) by azeotropic distillation intoType: GrantFiled: December 4, 2002Date of Patent: June 24, 2008Assignee: BB Chemicals LimitedInventors: Robert William Clarke, Mark Stephen Roberts
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Patent number: 7262322Abstract: An oxidation process for the production of alkenes and carboxylic acids from a feed comprising alkene and/or alkane, carbon monoxide, a molecular oxygen containing gas and optionally water in the presence of an oxidation catalyst in which the level of carbon monoxide is maintained between 1% and 20% by volume of the total feed to the reactor.Type: GrantFiled: May 13, 2004Date of Patent: August 28, 2007Assignee: BP Chemicals LimitedInventors: Ewen James Ferguson, Andrew Richard Lucy, Mark Stephen Roberts, Diana Rachel Taylor, Bruce Leo Williams
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Patent number: 7078563Abstract: A process for the oxidation of a C2 to C4 alkane to produce the corresponding alkene and carboxylic acid which process comprises contacting in an oxidation reaction zone, said alkane, molecular oxygen-containing gas, and the corresponding alkene and optionally, water, in the presence of at least one catalyst active for the oxidation of the alkane to the corresponding alkene and carboxylic acid, to produce a product stream comprising alkene, carboxylic acid and water, wherein in said process the molar ratio of alkene to carboxylic acid produced in said oxidation reaction zone is adjusted or maintained at a pre-determined value by controlling the concentrations of the alkene and optional water in said oxidation reaction zone and optionally by also controlling one or more of the pressure, temperature and residence time of the oxidation reaction zone. Such an oxidation process may be used in an integrated process, such as for the manufacture of vinyl acetate or ethyl acetate.Type: GrantFiled: September 28, 2001Date of Patent: July 18, 2006Assignee: BP Chemicals LimitedInventors: Brian Ellis, Andrew Richard Lucy, Mark Stephen Roberts
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Patent number: 6727380Abstract: A process for the oxidation of a C2 to C4 alkane to produce the corresponding alkene and carboxylic acid which process comprises contacting in an oxidation reaction zone, said alkane, molecular oxygen-containing gas, and optionally, at least one of the corresponding alkene and water, in the presence of at least two catalysts each active, with different selectivities, for the oxidation of the alkane to the corresponding alkene and carboxylic acid, to produce a product stream comprising said alkene, carboxylic acid and water, and in which process the molar ratio of alkene to carboxylic acid produced in said oxidation reaction zone is adjusted or maintained at a pre-determined value by controlling the relative proportions of the at least two catalysts in said oxidation reaction zone. Such an oxidation process may be used in an integrated process, such as for the manufacture of ethyl acetate or vinyl acetate.Type: GrantFiled: February 21, 2003Date of Patent: April 27, 2004Assignee: BP Chemicals LimitedInventors: Brian Ellis, Mark Stephen Roberts
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Publication number: 20030149295Abstract: A process for the oxidation of a C2 to C4 alkane to produce the corresponding alkene and carboxylic acid which process comprises contacting in an oxidation reaction zone, said alkane, molecular oxygen-containing gas, and optionally, at least one of the corresponding alkene and water, in the presence of at least two catalysts each active, with different selectivities, for the oxidation of the alkane to the corresponding alkene and carboxylic acid, to produce a product stream comprising said alkene, carboxylic acid and water, and in which process the molar ratio of alkene to carboxylic acid produced in said oxidation reaction zone is adjusted or maintained at a pre-determined value by controlling the relative proportions of the at least two catalysts in said oxidation reaction zone. Such an oxidation process may be used in an integrated process, such as for the manufacture of ethyl acetate or vinyl acetate.Type: ApplicationFiled: February 21, 2003Publication date: August 7, 2003Applicant: BP Chemicals LimitedInventors: Brian Ellis, Mark Stephen Roberts
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Patent number: 6548697Abstract: A process for the oxidation of a C2 to C4 alkane to produce the corresponding alkene and carboxylic acid which process comprises contacting in an oxidation reaction zone, said alkane, molecular oxygen-containing gas, and optionally, at least one of the corresponding alkene and water, in the presence of at least two catalysts each active, with different selectivities, for the oxidation of the alkane to the corresponding alkene and carboxylic acid, to produce a product stream comprising said alkene, carboxylic acid and water, and in which process the molar ratio of alkene to carboxylic acid produced in said oxidation reaction zone is adjusted or maintained at a pre-determined value by controlling the relative proportions of the at least two catalysts in said oxidation reaction zone. Such an oxidation process may be used in an integrated process, such as for the manufacture of ethyl acetate or vinyl acetate.Type: GrantFiled: July 18, 2002Date of Patent: April 15, 2003Assignee: BP Chemicals LimitedInventors: Brian Ellis, Mark Stephen Roberts
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Patent number: 6476261Abstract: A process for the oxidation of a C2 to C4 alkane to produce the corresponding alkene and carboxylic acid which process comprises contacting in an oxidation reaction zone, said alkane, molecular oxygen-containing gas, and optionally, at least one of the corresponding alkene and water, in the presence of at least two catalysts each active, with different selectivities, for the oxidation of the alkane to the corresponding alkene and carboxylic acid, to produce a product stream comprising said alkene, carboxylic acid and water, and in which process the molar ratio of alkene to carboxylic acid produced in said oxidation reaction zone is adjusted or maintained at a pre-determined value by controlling the relative proportions of the at least two catalysts in said oxidation reaction zone. Such an oxidation process may be used in an integrated process, such as for the manufacture of ethyl acetate or vinyl acetate.Type: GrantFiled: September 28, 2001Date of Patent: November 5, 2002Assignee: BP Chemicals LimitedInventors: Brian Ellis, Mark Stephen Roberts
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Publication number: 20020099239Abstract: A process for the oxidation of a C2 to C4 alkane to produce the corresponding alkene and carboxylic acid which process comprises contacting in an oxidation reaction zone, said alkane, molecular oxygen-containing gas, and optionally, at least one of the corresponding alkene and water, in the presence of at least two catalysts each active, with different selectivities, for the oxidation of the alkane to the corresponding alkene and carboxylic acid, to produce a product stream comprising said alkene, carboxylic acid and water, and in which process the molar ratio of alkene to carboxylic acid produced in said oxidation reaction zone is adjusted or maintained at a pre-determined value by controlling the relative proportions of the at least two catalysts in said oxidation reaction zone. Such an oxidation process may be used in an integrated process, such as for the manufacture of ethyl acetate or vinyl acetate.Type: ApplicationFiled: September 28, 2001Publication date: July 25, 2002Inventors: Brian Ellis, Mark Stephen Roberts
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Publication number: 20020082445Abstract: A process for the oxidation of a C2 to C4 alkane to produce the corresponding alkene and carboxylic acid which process comprises contacting in an oxidation reaction zone, said alkane, molecular oxygen-containing gas, and the corresponding alkene and optionally, water, in the presence of at least one catalyst active for the oxidation of the alkane to the corresponding alkene and carboxylic acid, to produce a product stream comprising alkene, carboxylic acid and water, wherein in said process the molar ratio of alkene to carboxylic acid produced in said oxidation reaction zone is adjusted or maintained at a pre-determined value by controlling the concentrations of the alkene and optional water in said oxidation reaction zone and optionally by also controlling one or more of the pressure, temperature and residence time of the oxidation reaction zone. Such an oxidation process may be used in an integrated process, such as for the manufacture of vinyl acetate or ethyl acetate.Type: ApplicationFiled: September 28, 2001Publication date: June 27, 2002Inventors: Brian Ellis, Andrew Richard Lucy, Mark Stephen Roberts
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Patent number: RE44206Abstract: An oxidation process for the production of alkenes and carboxylic acids from a feed comprising alkene and/or alkane, carbon monoxide, a molecular oxygen containing gas and optionally water in the presence of an oxidation catalyst in which the level of carbon monoxide is maintained between 1% and 20% by volume of the total feed to the reactor.Type: GrantFiled: May 16, 2011Date of Patent: May 7, 2013Assignee: BP Chemicals LimitedInventors: Ewen James Ferguson, Andrew Richard Lucy, Mark Stephen Roberts, Diana Rachel Taylor, Bruce Leo Williams