Patents by Inventor Melvin L. Luetkens, Jr.
Melvin L. Luetkens, Jr. 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: 11180700Abstract: Methods are provided for refining natural oil feedstocks. The methods comprise reacting the feedstock in the presence of a metathesis catalyst under conditions sufficient to form a metathesized product comprising olefins and esters. In certain embodiments, the methods further comprise separating the olefins from the esters in the metathesized product. In certain embodiments, the methods further comprise hydrogenating the olefins under conditions sufficient to form a fuel composition. In certain embodiments, the methods further comprise transesterifying the esters in the presence of an alcohol to form a transesterified product.Type: GrantFiled: May 15, 2020Date of Patent: November 23, 2021Assignee: Wilmar Trading Pte. Ltd.Inventors: Steven A. Cohen, Melvin L. Luetkens, Jr., Chander Balakrishnan, Robert Snyder
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Patent number: 10689582Abstract: Methods are provided for refining natural oil feedstocks. The methods comprise reacting the feedstock in the presence of a metathesis catalyst under conditions sufficient to form a metathesized product comprising olefins and esters. In certain embodiments, the methods further comprise separating the olefins from the esters in the metathesized product. In certain embodiments, the methods further comprise hydrogenating the olefins under conditions sufficient to form a fuel composition. In certain embodiments, the methods further comprise transesterifying the esters in the presence of an alcohol to form a transesterified product.Type: GrantFiled: July 6, 2017Date of Patent: June 23, 2020Assignee: Elevance Renewable Sciences, Inc.Inventors: Steven A. Cohen, Melvin L. Luetkens, Jr., Chander Balakrishnan, Robert Snyder
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Publication number: 20180044597Abstract: Methods are provided for refining natural oil feedstocks. The methods comprise reacting the feedstock in the presence of a metathesis catalyst under conditions sufficient to form a metathesized product comprising olefins and esters. In certain embodiments, the methods further comprise separating the olefins from the esters in the metathesized product. In certain embodiments, the methods further comprise hydrogenating the olefins under conditions sufficient to form a fuel composition. In certain embodiments, the methods further comprise transesterifying the esters in the presence of an alcohol to form a transesterified product.Type: ApplicationFiled: July 6, 2017Publication date: February 15, 2018Applicant: Elevance Renewable Sciences, Inc.Inventors: Steven A. Cohen, Melvin L. Luetkens, JR., Chander Balakrishnan, Robert Snyder
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Patent number: 9732282Abstract: Methods are provided for refining natural oil feedstocks. The methods comprise reacting the feedstock in the presence of a metathesis catalyst under conditions sufficient to form a metathesized product comprising olefins and esters. In certain embodiments, the methods further comprise separating the olefins from the esters in the metathesized product. In certain embodiments, the methods further comprise hydrogenating the olefins under conditions sufficient to form a fuel composition. In certain embodiments, the methods further comprise transesterifying the esters in the presence of an alcohol to form a transesterified product.Type: GrantFiled: September 19, 2016Date of Patent: August 15, 2017Assignee: Elevance Renewable Sciences, Inc.Inventors: Steven A. Cohen, Melvin L. Luetkens, Jr., Chander Balakrishnan, Robert Snyder
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Patent number: 9643989Abstract: A method for preparing a ruthenium carbene complex precursor includes reacting a ruthenium refinery salt with a hydrogen halide to form a ruthenium intermediate, and reacting the ruthenium intermediate with an L-type ligand to form the ruthenium carbene complex precursor. A method for preparing a ruthenium vinylcarbene complex includes converting a ruthenium carbene complex precursor into a ruthenium hydrido halide complex, and reacting the ruthenium hydrido halide complex with a propargyl halide to form the ruthenium vinylcarbene complex. A method for preparing a ruthenium carbene complex includes converting a ruthenium carbene complex precursor into a ruthenium carbene complex having a structure (PR1R2R3)2Cl2Ru?CH—R4, wherein R1, R2, R3, and R4 are alike or different, and wherein covalent bonds may optionally exist between two or more of R1, R2, and R3.Type: GrantFiled: May 1, 2014Date of Patent: May 9, 2017Assignee: Elevance Renewable Sciences, Inc.Inventors: Linda A. Kunz, Steven A. Cohen, Melvin L. Luetkens, Jr.
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Publication number: 20170066972Abstract: Methods are provided for refining natural oil feedstocks. The methods comprise reacting the feedstock in the presence of a metathesis catalyst under conditions sufficient to form a metathesized product comprising olefins and esters. In certain embodiments, the methods further comprise separating the olefins from the esters in the metathesized product. In certain embodiments, the methods further comprise hydrogenating the olefins under conditions sufficient to form a fuel composition. In certain embodiments, the methods further comprise transesterifying the esters in the presence of an alcohol to form a transesterified product.Type: ApplicationFiled: September 19, 2016Publication date: March 9, 2017Applicant: Elevance Renewable Sciences, Inc.Inventors: Steven A. Cohen, Melvin L. Luetkens, Jr., Chander Balakrishnan, Robert Snyder
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Patent number: 9469827Abstract: Methods are provided for refining natural oil feedstocks. The methods comprise reacting the feedstock in the presence of a metathesis catalyst under conditions sufficient to form a metathesized product comprising olefins and esters. In certain embodiments, the methods further comprise separating the olefins from the esters in the metathesized product. In certain embodiments, the methods further comprise hydrogenating the olefins under conditions sufficient to form a fuel composition. In certain embodiments, the methods further comprise transesterifying the esters in the presence of an alcohol to form a transesterified product.Type: GrantFiled: January 6, 2015Date of Patent: October 18, 2016Assignee: Elevance Renewable Sciences, Inc.Inventors: Steven A. Cohen, Melvin L. Luetkens, Jr., Chander Balakrishnan, Robert Snyder
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Patent number: 9464258Abstract: Methods are provided for refining natural oil feedstocks and partially hydrogenating polyunsaturated olefins and polyunsaturated esters. The methods comprise reacting the feedstock in the presence of a metathesis catalyst under conditions sufficient to form a metathesized product comprising olefins and esters. In certain embodiments, the methods further comprise separating the polyunsaturated olefins from the polyunsaturated esters in the metathesized product. In certain embodiments, the methods further comprise partially hydrogenating the polyunsaturated olefins in the presence of a hydrogenation catalyst, wherein at least a portion of the polyunsaturated olefins are converted to monounsaturated olefins. In other embodiments, the methods further comprise partially hydrogenating the polyunsaturated esters in the presence of a hydrogenation catalyst, wherein at least a portion of the polyunsaturated esters are converted to monounsaturated esters.Type: GrantFiled: April 30, 2015Date of Patent: October 11, 2016Assignee: Elevance Renewable Sciences, Inc.Inventors: Linda A. Kunz, Robert B. Snyder, Chander Balakrishnan, Tessa M. Pals, Melvin L. Luetkens, Jr., Steven A. Cohen
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Patent number: 9273258Abstract: Methods are provided for producing a jet fuel composition from a feedstock including a natural oil. The methods include reacting the feedstock with a low-weight olefin in the presence of a metathesis catalyst under conditions sufficient to form a metathesized product. The methods further include hydrogenating the metathesized product under conditions sufficient to form a jet fuel composition.Type: GrantFiled: December 8, 2014Date of Patent: March 1, 2016Assignee: Elevance Renewable Sciences, Inc.Inventors: Melvin L. Luetkens, Jr., Steven A. Cohen, Chander Balakrishnan
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Publication number: 20150247107Abstract: Methods are provided for refining natural oil feedstocks and partially hydrogenating polyunsaturated olefins and polyunsaturated esters. The methods comprise reacting the feedstock in the presence of a metathesis catalyst under conditions sufficient to form a metathesized product comprising olefins and esters. In certain embodiments, the methods further comprise separating the polyunsaturated olefins from the polyunsaturated esters in the metathesized product. In certain embodiments, the methods further comprise partially hydrogenating the polyunsaturated olefins in the presence of a hydrogenation catalyst, wherein at least a portion of the polyunsaturated olefins are converted to monounsaturated olefins. In other embodiments, the methods further comprise partially hydrogenating the polyunsaturated esters in the presence of a hydrogenation catalyst, wherein at least a portion of the polyunsaturated esters are converted to monounsaturated esters.Type: ApplicationFiled: April 30, 2015Publication date: September 3, 2015Applicant: ELEVANCE RENEWABLE SCIENCES, INC.Inventors: Linda A. Kunz, Robert B. Snyder, Chander Balakrishnan, Tessa M. Pals, Melvin L. Luetkens, JR., Steven A. Cohen
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Publication number: 20150240186Abstract: Methods are provided for refining natural oil feedstocks. The methods comprise reacting the feedstock in the presence of a metathesis catalyst under conditions sufficient to form a metathesized product comprising olefins and esters. In certain embodiments, the methods further comprise separating the olefins from the esters in the metathesized product. In certain embodiments, the methods further comprise hydrogenating the olefins under conditions sufficient to form a fuel composition. In certain embodiments, the methods further comprise transesterifying the esters in the presence of an alcohol to form a transesterified product.Type: ApplicationFiled: January 6, 2015Publication date: August 27, 2015Applicant: ELEVANCE RENEWABLE SCIENCES, INC.Inventors: Steven A. Cohen, Melvin L. Luetkens, JR., Chander Balakrishnan, Robert Snyder
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Patent number: 9051519Abstract: Methods are provided for refining natural oil feedstocks and partially hydrogenating polyunsaturated olefins and polyunsaturated esters. The methods comprise reacting the feedstock in the presence of a metathesis catalyst under conditions sufficient to form a metathesized product comprising olefins and esters. In certain embodiments, the methods further comprise separating the polyunsaturated olefins from the polyunsaturated esters in the metathesized product. In certain embodiments, the methods further comprise partially hydrogenating the polyunsaturated olefins in the presence of a hydrogenation catalyst, wherein at least a portion of the polyunsaturated olefins are converted to monounsaturated olefins. In other embodiments, the methods further comprise partially hydrogenating the polyunsaturated esters in the presence of a hydrogenation catalyst, wherein at least a portion of the polyunsaturated esters are converted to monounsaturated esters.Type: GrantFiled: March 14, 2013Date of Patent: June 9, 2015Assignee: Elevance Renewable Sciences, Inc.Inventors: Linda A. Kunz, Tessa M. Pals, Steven A. Cohen, Melvin L. Luetkens, Jr., Chander Balakrishnan, Robert B. Snyder
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Publication number: 20150133706Abstract: Methods are provided for producing a jet fuel composition from a feedstock comprising a natural oil. The methods comprise reacting the feedstock with oxygen under conditions sufficient to form an oxygen-cleaved product. The methods further comprise hydrogenating the oxygen-cleaved product under conditions sufficient to form a jet fuel composition.Type: ApplicationFiled: October 16, 2014Publication date: May 14, 2015Applicant: ELEVANCE RENEWABLE SCIENCES, INC.Inventors: Melvin L. Luetkens, JR., Steven A. Cohen
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Publication number: 20150094504Abstract: Methods are provided for producing a jet fuel composition from a feedstock including a natural oil. The methods include reacting the feedstock with a low-weight olefin in the presence of a metathesis catalyst under conditions sufficient to form a metathesized product. The methods further include hydrogenating the metathesized product under conditions sufficient to form a jet fuel composition.Type: ApplicationFiled: December 8, 2014Publication date: April 2, 2015Applicant: ELEVANCE RENEWABLE SCIENCES, INC.Inventors: Melvin L. Luetkens, JR., Steven A. Cohen, Chander Balakrishnan
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Patent number: 8957268Abstract: Methods are provided for refining natural oil feedstocks. The methods comprise reacting the feedstock in the presence of a metathesis catalyst under conditions sufficient to form a metathesized product comprising olefins and esters. In certain embodiments, the methods further comprise separating the olefins from the esters in the metathesized product. In certain embodiments, the methods further comprise hydrogenating the olefins under conditions sufficient to form a fuel composition. In certain embodiments, the methods further comprise transesterifying the esters in the presence of an alcohol to form a transesterified product.Type: GrantFiled: October 11, 2010Date of Patent: February 17, 2015Assignee: Elevance Renewable Sciences, Inc.Inventors: Steven A. Cohen, Melvin L. Luetkens, Jr., Chander Balakrishnan, Robert Snyder
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Patent number: 8933285Abstract: Methods are provided for producing a jet fuel composition from a feedstock comprising a natural oil. The methods comprise reacting the feedstock with a low-weight olefin in the presence of a metathesis catalyst under conditions sufficient to form a metathesized product. The methods further comprise hydrogenating the metathesized product under conditions sufficient to form a jet fuel composition.Type: GrantFiled: November 25, 2009Date of Patent: January 13, 2015Assignee: Elevance Renewable Sciences, Inc.Inventors: Melvin L. Luetkens, Jr., Steven A. Cohen, Chander Balakrishnan
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Patent number: 8889932Abstract: Methods are provided for producing a jet fuel composition from a feedstock comprising a natural oil. The methods comprise reacting the feedstock with oxygen under conditions sufficient to form an oxygen-cleaved product. The methods further comprise hydrogenating the oxygen-cleaved product under conditions sufficient to form a jet fuel composition.Type: GrantFiled: November 25, 2009Date of Patent: November 18, 2014Assignee: Elevance Renewable Sciences, Inc.Inventors: Melvin L. Luetkens, Jr., Steven A. Cohen
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Publication number: 20140336398Abstract: Methods are provided for refining natural oil feedstocks. The methods include reacting the feedstock with a low-molecular-weight olefin or mid-weight olefin in the presence of a metathesis catalyst under conditions sufficient to form a metathesized product including olefins and esters. In certain embodiments, the methods further include separating the olefins from the esters in the metathesized product. In certain embodiments, the methods further include transesterifying the esters in the presence of an alcohol to form a transesterified product.Type: ApplicationFiled: April 15, 2014Publication date: November 13, 2014Applicant: ELEVANCE RENEWABLE SCIENCES, INC.Inventors: Steven A. Cohen, Melvin L. Luetkens, JR., Chander Balakrishnan, Robert Snyder, Yenamandra Viswanath, Efimia Metsi-Guckel, Robin Weitkamp
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Publication number: 20140336399Abstract: Methods are provided for refining natural oil feedstocks. The methods include reacting the feedstock with a molar excess of low-molecular-weight olefins in the presence of a metathesis catalyst. In certain embodiments, the methods further include separating at least a portion of the unreacted low-molecular-weight olefins. In certain embodiments, the methods further include recycling the separated unreacted low-molecular-weight olefins.Type: ApplicationFiled: July 16, 2014Publication date: November 13, 2014Applicant: ELEVANCE RENEWABLE SCIENCES, INC.Inventors: Steven A. Cohen, Melvin L. Luetkens, JR., Chander Balakrishnan, Robert Snyder
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Publication number: 20140323737Abstract: A method for preparing a ruthenium carbene complex precursor includes reacting a ruthenium refinery salt with a hydrogen halide to form a ruthenium intermediate, and reacting the ruthenium intermediate with an L-type ligand to form the ruthenium carbene complex precursor. A method for preparing a ruthenium vinylcarbene complex includes converting a ruthenium carbene complex precursor into a ruthenium hydrido halide complex, and reacting the ruthenium hydrido halide complex with a propargyl halide to form the ruthenium vinylcarbene complex. A method for preparing a ruthenium carbene complex includes converting a ruthenium carbene complex precursor into a ruthenium carbene complex having a structure (PR1R2R3)2Cl2Ru?CH—R4, wherein R1, R2, R3, and R4 are alike or different, and wherein covalent bonds may optionally exist between two or more of R1, R2, and R3.Type: ApplicationFiled: May 1, 2014Publication date: October 30, 2014Applicant: ELEVANCE RENEWABLE SCIENCES, INC.Inventors: Linda A. Kunz, Steven A. Cohen, Melvin L. Luetkens, JR.