Patents by Inventor Roger Arthur Sheldon
Roger Arthur Sheldon 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: 9353367Abstract: A non-leachable, crosslinked, on a nanometer scale formed magnetic enzyme aggregate, consisting of a non-layered, hybrid nano-composite of functionalized magnetic nanoparticles and aggregated enzyme particles, is described. The magnetic enzyme aggregate can have a high enzyme content, of up to 99%. The high enzyme content allows the use on a small scale, such as for example in a fluidized bed, of the magnetic enzyme aggregate. Also, a process for the preparation of the present magnetic enzyme aggregate is described.Type: GrantFiled: July 12, 2011Date of Patent: May 31, 2016Assignee: CLEA TECHNOLOGIES B. V.Inventors: Roger Arthur Sheldon, Menno Jort Sorgedrager, Bernadett Kondor
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Publication number: 20130196407Abstract: A non-leachable, crosslinked, on a nanometer scale formed magnetic enzyme aggregate, consisting of a non-layered, hybrid nano-composite of functionalised magnetic nanoparticles and aggregated enzyme particles, is described. The magnetic enzyme aggregate can have a high enzyme content, of up to 99%. The high enzyme content allows the use on a small scale, such as for example in a fluidised bed, of the magnetic enzyme aggregate. Also, a process for the preparation of the present magnetic enzyme aggregate is described.Type: ApplicationFiled: July 12, 2011Publication date: August 1, 2013Applicant: CLEA TECHNOLOGIES B.V.Inventors: Roger Arthur Sheldon, Menno Jort Sorgedrager, Bernadett Kondor
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Patent number: 7718564Abstract: The present invention is related to a hydrocarbon oxidation process. The process comprises bringing one or more hydrocarbons into contact with a source of oxygen in the presence of a radical initiator and a catalyst. The catalyst comprises an organic metal complex located on a catalyst support, and is obtained by partial decomposition of the organic metal complex. For example, the process can be used to produce dimethyl carbonate from dimethoxy methane. The invention is also related to a partially decomposed catalyst that comprises a silica support and an organic metal complex, wherein at least 5% of the organic compound remains in the catalyst. The organic metal complex comprises an organic compound and a metal-based compound wherein the metal is selected from copper, nickel, and combinations thereof.Type: GrantFiled: May 16, 2006Date of Patent: May 18, 2010Assignee: ExxonMobil Research and Engineering CompanyInventors: Jihad Mohammed Dakka, Sabato Miseo, Stuart Leon Soled, Jose Guadalupe Santiesteban, Joseph Ernest Baumgartner, Michiel Christian Alexander Van Vliet, Roger Arthur Sheldon
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Patent number: 7145041Abstract: The invention relates to a method for catalytically oxidizing unsaturated hydrocarbons to form oxidation products, and to the production of saturated alcohols, ketones, aldehydes or carboxylic acids by subsequently hydrogenating the oxidation product. A compound of formula (I) is used as a catalyst during oxidizing in which: R1, R2=H, an aliphatic or aromatic alkoxy radical, carboxyl radical, alkoxycarbonyl radical or hydrocarbon radical, each having 1 to 20 carbon atoms, SO3H, NH2, OH, F, Cl, Br, I and/or NO2, whereby R1 and R2 signify identical or different radicals or R1 and R2 can be coupled to one another via a covalent bond, with Q1, Q2=the same or different, C, CH, N; X, Z=C, S or CH2; Y=O or OH; k=0, 1 or 2; 1=0, 1 or 2; m=1 to 100 in the presence of a radical initiator. Peroxy compounds or azo compounds can be used as radical initiators. Preferred substrates are cyclic aliphatic or aromatic compounds.Type: GrantFiled: June 12, 2002Date of Patent: December 5, 2006Assignee: Degussa AGInventors: Adolf Kuehnle, Carsten Jost, Roger Arthur Sheldon, Sandrine M. M. Chatel, Isabella W. C. E. Arends
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Patent number: 7019175Abstract: The invention provides a process for the catalytic oxidation of an alkane, which comprises contacting the alkane with a source of oxygen in the presence of a catalyst comprising a compound of the formula (2) where R1 and R2 independently represent a hydrogen atom, a halogen atom, an alkyl group, an aryl group, a cycloalkyl group, a hydroxyl group, an alkoxy group, a carboxyl group, an alkoxycarbonyl group, or an acyl group, or R1 and R2 may together form a double bond or an aromatic or non-aromatic ring; Y represents an oxygen atom or a sulfur atom; X represents an oxygen atom or a hydroxyl group; m denotes an integer of 0 to 4; and n denotes an integer of 1 to 3. Compounds in accordance with formula (2) possess good catalytic properties, such that when they are employed in a process in accordance with the present invention, they are capable of activating a source of oxygen and promoting the oxidation of an alkane at mild reaction temperatures.Type: GrantFiled: May 30, 2002Date of Patent: March 28, 2006Assignee: Imperial Chemical Industries PLCInventors: Xavier Baucherel, Roger Arthur Sheldon
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Patent number: 6897058Abstract: Method for the preparation of an enantiomerically enriched acylated amine wherein a phenylacetic acid derivative is brought into contact with a mixture of enantiomers of an amine H2NCR1R2R3, in which R1, R2, R3 are not equal to each other and each independently stand for H, CN, a whether or not substituted (cyclo)alkyl, ary-, alkylaryl or arylalkyl group, whether or not cyclic heteroalkyl or heteroaryl group with one or more N, O or S atoms or in which R1 and R2 (and R3) together with the C-atom to which they have been bound form a (bi)cyclic group that optionally contains one or more N, O of S atoms, in the presence of a Pen-G acylase derived from Alcaligenes faecalis. And method for the preparation of enantiomerically enriched amine of formula H2NCR1R2R3, in which R1, R2, R3 are as defined above, wherein an acylated amine is brought into contact with a Pen-G acylase originating from Alcaligenes faecalis.Type: GrantFiled: August 30, 2001Date of Patent: May 24, 2005Assignee: DSM IP Assets B.V.Inventors: Vytautas-Juozapas Kajetono {hacek over (S)}vedas, Dorel Teodor Guranda, Roger Arthur Sheldon, Frederik Rantwijk Van, Lukas Michaël Langen Van
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Patent number: 6852893Abstract: The invention relates to a method for oxidizing substrates such as hydrocarbons, waxes or soot. The method involves the use of a compound of formula (I) in which: R1 and R2 represent H, an aliphatic or aromatic alkoxy radical, carboxyl radical, alkoxycarbonyl radical or hydrocarbon radical, each having 1 to 20 hydrocarbon atoms, SO3H, NH2, OH, F, Cl, Br, I and/or NO2, whereby R1 and R2 designate identical or different radicals or R1 and R2 can be linked to one another via a covalent bonding; Q1 and Q2 represent C, CH, N, CR5, each being the same or different; X and Z represent C, S, CH2, each being the same or different; Y represents O and OH; k=0, 1, 2; l=0, 1, 2; m=1 to 3, and; R5 represents one of the meanings of R1. Said compound is used as a catalyst in the presence of a radical initiator, whereby the molar ratio of the catalyst to the hydrocarbon is less than 10 mol %. Peroxy compounds or azo compounds can be used as the radical initiator. Preferred substrates are aliphatic or aromatic hydrocarbons.Type: GrantFiled: March 22, 2001Date of Patent: February 8, 2005Assignee: Creavis Gesellschaft fuer Technologie and Innovation mbHInventors: Adolf Kühnle, Mark Duda, Carsten Jost, Guido Fries, Jochen Kirchhoff, Thomas Schiffer, Roger Arthur Sheldon, Sasidharan Manickam, Isabella W. C. E. Arends
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Publication number: 20040249197Abstract: The invention relates to a method for catalytically oxidizing unsaturated hydrocarbons to form oxidation products, and to the production of saturated alcohols, ketones, aldehydes or carboxylic acids by subsequently hydrogenating the oxidation product. A compound of formula (I) is used as a catalyst during oxidizing in which: R1, R2═H, an aliphatic or aromatic alkoxy radical, carboxyl radical, alkoxycarbonyl radical or hydrocarbon radical, each having 1 to 20 carbon atoms, SO3H, NH2, OH, F, Cl, Br, I and/or NO2, whereby R1 and R2 signify identical or different radicals or R1 and R2 can be coupled to one another via a covalent bond, with Q1, Q2=the same or different, C, CH, N; X, Z═C, S or CH2; Y═O or OH; k=0, 1 or 2; 1=0, 1 or 2; m=1 to 100 in the presence of a radical initiator. Peroxy compounds or azo compounds can be used as radical initiators. Preferred substrates are cyclic aliphatic or aromatic compounds.Type: ApplicationFiled: June 25, 2004Publication date: December 9, 2004Inventors: Adolf Kuhnle, Carsten Jost, Roger Arthur Sheldon, Sandrine M.M. Chatel, Isabella W.C.E. Arends
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Publication number: 20040235126Abstract: The invention relates to a method of preparing cross-linked enzyme aggregates (CLEAs) comprising the steps of a) precipitating a dissolved enzyme present in a liquid medium: b) cross-linking with a cross-linker, and c) optionally, washing the cross-linked enzyme aggregate. According to the invention at least one treatment is performed chosen from the group consisting of I) performing step a) in the presence of a compound selected from the group consisting of i) a crown ether, and ii) a surfactant, and II) performing step c) with a second liquid differing in organic composition from the liquid.Type: ApplicationFiled: July 9, 2004Publication date: November 25, 2004Inventors: Paloma Lopez Serrano, Linqiu Cao, Frederik Van Rantwijk, Roger Arthur Sheldon
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Patent number: 6720462Abstract: The invention relates to a process for preparing phenol derivatives by catalytic oxidation of an aromatic hydrocarbon to the hydroperoxide and subsequent cleavage of the hydroperoxide to give the phenol derivative and a ketone, wherein a compound of the formula I where R1, R2=H, aliphatic or aromatic alkoxy radical, carboxyl radical, alkoxycarbonyl radical or hydrocarbon radical, in each case having from 1 to 20 carbon atoms, SO3H, NH2, OH, F, Cl, Br, I and/or NO2, where R1 and R2 are identical or different radicals or R1 and R2 may be joined to one another via a covalent bond, and X, Z=C, S, CH2 Y=O, OH k=0, 1, 2 l=0, 1, 2 m=1-3; is used as oxidation catalyst in the presence of a free-radical initiator, where the molar ratio of the catalyst to the aromatic hydrocarbon is less than 10 mol %.Type: GrantFiled: September 26, 2002Date of Patent: April 13, 2004Assignee: Degussa AGInventors: Adolf Kuhnle, Mark Duda, Uwe Tanger, Roger Arthur Sheldon, Sasidharan Manickam, Isabella W. C. E. Arends
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Publication number: 20040014181Abstract: Method for the preparation of an enantiomerically enriched acylated amine wherein a phenylacetic acid derivative is brought into contact with a mixture of enantiomers of an amine H2NCR1R2R3, in which R1, R2, R3 are not equal to each other and each independently stand for H, CN, a whether or not substituted (cyclo)alkyl, ary-, alkylaryl or arylalkyl group, whether or not cyclic heteroalkyl or heteroaryl group with one or more N, O or S atoms or in which R1 and R2 (and R3) together with the C-atom to which they have been bound form a (bi)cyclic group that optionally contains one or more N, O of S atoms, in the presence of a Pen-G acylase derived from Alcaligenes faecalis.Type: ApplicationFiled: June 24, 2003Publication date: January 22, 2004Inventors: Vytautas-Juozapas Kajetono Svedas, Dorel Teodor Guranda, Roger Arthur Sheldon, Frederik Rantwijk Van, Lukas Mich?auml;el Langen Van
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Publication number: 20030083527Abstract: The invention relates to a process for preparing phenol derivatives by catalytic oxidation of an aromatic hydrocarbon to the hydroperoxide and subsequent cleavage of the hydroperoxide to give the phenol derivative and a ketone, wherein a compound of the formula I 1Type: ApplicationFiled: September 26, 2002Publication date: May 1, 2003Inventors: Adolf Kuhnle, Mark Duda, Uwe Tanger, Roger Arthur Sheldon, Sasidharan Manickam, Isabella W.C.E. Arends