Patents by Inventor Lawrence M. Candela
Lawrence M. Candela 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: 9586881Abstract: Processes for producing propylene glycol monoalkyl ether are described herein and include contacting propylene oxide and an alcohol in the presence of an alkali or alkaline earth metal alkoxide catalyst to produce an alkoxylation mixture including propylene glycol monoalkyl ether; distilling the alkoxylation mixture to produce a first overhead stream including propylene oxide and the alcohol and a first bottoms stream including propylene glycol monoalkyl ether; distilling the first bottoms stream to produce a second overhead stream including purified propylene glycol monoalkyl ether and a second bottoms stream including heavier byproducts; further distilling the second bottoms stream to form a resulting bottoms stream including caustic and heavier byproducts; introducing an alkali metal borohydride into at least a portion of the resulting bottoms stream to form an alkali metal borohydride containing stream; and introducing the alkali metal borohydride containing stream into one or more distillations upstreamType: GrantFiled: October 12, 2015Date of Patent: March 7, 2017Assignee: Lyondell Chemical Technology, L.P.Inventors: Xiangmin Li, Lawrence M. Candela, Mark A. Liepa, David W. Leyshon
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Publication number: 20160031779Abstract: Processes for producing propylene glycol monoalkyl ether are described herein and include contacting propylene oxide and an alcohol in the presence of an alkali or alkaline earth metal alkoxide catalyst to produce an alkoxylation mixture including propylene glycol monoalkyl ether; distilling the alkoxylation mixture to produce a first overhead stream including propylene oxide and the alcohol and a first bottoms stream including propylene glycol monoalkyl ether; distilling the first bottoms stream to produce a second overhead stream including purified propylene glycol monoalkyl ether and a second bottoms stream including heavier byproducts; further distilling the second bottoms stream to form a resulting bottoms stream including caustic and heavier byproducts; introducing an alkali metal borohydride into at least a portion of the resulting bottoms stream to form an alkali metal borohydride containing stream; and introducing the alkali metal borohydride containing stream into one or more distillations upstreamType: ApplicationFiled: October 12, 2015Publication date: February 4, 2016Inventors: XIANGMIN LI, Lawrence M. Candela, Mark A. Liepa, David W. Leyshon
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Patent number: 9187392Abstract: The invention is a process for producing a propylene glycol monoalkyl ether which comprises first reacting propylene oxide and an alcohol in the presence of an alkali or alkaline earth metal alkoxide catalyst to produce an alkoxylation mixture comprising propylene glycol monoalkyl ether; distilling the alkoxylation mixture to produce a first overhead stream comprising propylene oxide and alcohol and a first bottoms stream comprising propylene glycol monoalkyl ether; and then distilling the first bottoms stream to produce purified propylene glycol monoalkyl ether as a second overhead stream. The reaction and/or one or more of the distillation steps occur in the presence of an alkali metal borohydride. The process produces propylene glycol monoalkyl ether with low UV absorbance and reduced carbonyl impurities.Type: GrantFiled: January 17, 2008Date of Patent: November 17, 2015Assignee: Lyondell Chemical Technology, L.P.Inventors: Xiangmin Li, Lawrence M. Candela, Mark A. Liepa
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Publication number: 20130172647Abstract: Processes and systems for forming propylene are described herein. The processes generally include reacting a metathesis feed stream including at least 95 wt. % 2-butene with ethylene in the presence of a metathesis catalyst to form a metathesis product stream including propylene, and recovering propylene from the process.Type: ApplicationFiled: February 22, 2013Publication date: July 4, 2013Applicants: Equistar Chemicals, LP, Lyondell Chemical Technology, L.P.Inventors: Steven T. Coleman, Gary A. Sawyer, Robert S. Bridges, Shaotian Wang, Lawrence M. Candela
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Patent number: 8193396Abstract: A process for producing allyl alcohol is disclosed. The process comprises reacting propylene, acetic acid, and oxygen to produce a reaction mixture. The reaction mixture is distilled to produce a vapor stream comprising propylene and a liquid stream comprising allyl acetate, acetic acid, acrolein, and allyl diacetate. The liquid stream is distilled to produce a lights stream comprising acrolein; a side draw comprising allyl acetate, acetic acid, and water; and a bottoms stream comprising acetic acid and allyl diacetate. The bottoms stream is distilled to remove a heavies stream comprising allyl diacetate. The side draw is hydrolyzed to produce allyl alcohol.Type: GrantFiled: February 25, 2010Date of Patent: June 5, 2012Assignee: Lyondell Chemical Technology, L.P.Inventors: Shaw-Chan Lin, Lawrence M. Candela, Andrew P. Kahn, Elizabeth I. Ross-Medgaarden, Gary A. Sawyer
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Patent number: 8080678Abstract: The invention is a method of purifying propylene oxide containing 25-100 ppm aldehyde impurities. The method comprises contacting the propylene oxide in the liquid phase with an amine-functionalized ion exchange resin, and recovering a purified propylene oxide product containing 10 ppm, or less, aldehydes.Type: GrantFiled: April 1, 2010Date of Patent: December 20, 2011Assignee: Lyondell Chemical Technology, L.P.Inventors: Xiangmin Li, Lawrence M. Candela, Brian A Salisbury
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Publication number: 20110245519Abstract: The invention is a method of purifying propylene oxide containing 25-100 ppm aldehyde impurities. The method comprises contacting the propylene oxide in the liquid phase with an amine-functionalized ion exchange resin, and recovering a purified propylene oxide product containing 10 ppm, or less, aldehydes.Type: ApplicationFiled: April 1, 2010Publication date: October 6, 2011Inventors: Xiangmin Li, Lawrence M. Candela, Brian A. Salisbury
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Publication number: 20110207973Abstract: A process for producing allyl alcohol is disclosed. The process comprises reacting propylene, acetic acid, and oxygen to produce a reaction mixture. The reaction mixture is distilled to produce a vapor stream comprising propylene and a liquid stream comprising allyl acetate, acetic acid, acrolein, and allyl diacetate. The liquid stream is distilled to produce a lights stream comprising acrolein; a side draw comprising allyl acetate, acetic acid, and water; and a bottoms stream comprising acetic acid and allyl diacetate. The bottoms stream is distilled to remove a heavies stream comprising allyl diacetate. The side draw is hydrolyzed to produce allyl alcohol.Type: ApplicationFiled: February 25, 2010Publication date: August 25, 2011Inventors: Shaw-Chan Lin, Lawrence M. Candela, Andrew P. Kahn, Elizabeth I. Ross-Medgaarden, Gary A. Sawyer
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Publication number: 20100155302Abstract: The invention is a method of purifying an ultralow sulfur diesel fuel which contains polycyclic aromatic color bodies. The method comprises contacting the ULSD fuel in the liquid phase with a coal-based activated carbon adsorbent having a surface area ranging from 800 to 1500 m2/g and containing pores having pore size greater than 20 ?, and recovering a purified diesel product having a decreased color bodies content.Type: ApplicationFiled: December 18, 2008Publication date: June 24, 2010Inventors: Mark P. Kaminsky, David W. Leyshon, Gopalakrishan Juttu, Allen B. Quakenbush, Lawrence M. Candela
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Publication number: 20090187049Abstract: The invention is a process for producing a propylene glycol monoalkyl ether which comprises first reacting propylene oxide and an alcohol in the presence of an alkali or alkaline earth metal alkoxide catalyst to produce an alkoxylation mixture comprising propylene glycol monoalkyl ether; distilling the alkoxylation mixture to produce a first overhead stream comprising propylene oxide and alcohol and a first bottoms stream comprising propylene glycol monoalkyl ether; and then distilling the first bottoms stream to produce purified propylene glycol monoalkyl ether as a second overhead stream. The reaction and/or one or more of the distillation steps occur in the presence of an alkali metal borohydride. The process produces propylene glycol monoalkyl ether with low UV absorbance and reduced carbonyl impurities.Type: ApplicationFiled: January 17, 2008Publication date: July 23, 2009Inventors: Xiangmin Li, Lawrence M. Candela, Mark A. Liepa
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Patent number: 7439405Abstract: The invention is a method of purifying a propylene glycol monoalkyl ether containing carbonyl impurities which comprises contacting the propylene glycol monoalkyl ether stream in the liquid phase with a carbon adsorbent, and recovering a purified propylene glycol monoalkyl ether product. The purification method improves product quality and reduces the amount of carbonyl impurities in the propylene glycol monoalkyl ether.Type: GrantFiled: January 14, 2008Date of Patent: October 21, 2008Assignee: Lyondell Chemical Technology, L.P.Inventors: Xiangmin Li, Lawrence M. Candela
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Patent number: 7022885Abstract: The present invention relates to purification of an MTBE process stream by contact in the liquid phase with a large pore zeolite such as 13X or Zeolite Y.Type: GrantFiled: November 21, 2002Date of Patent: April 4, 2006Assignee: Arco Chemical Technology, L.P.Inventors: Lawrence J. Karas, Lawrence M. Candela, Andrew P. Kahn
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Patent number: 6770790Abstract: The invention is a method to purify tertiary butyl alcohol by contact with at least two solid adsorbents comprising aluminum oxide and a large pore zeolite such as zeolite X. The purification method successfully improves product quality and reduces the amount of impurities in the tertiary butyl alcohol.Type: GrantFiled: October 17, 2003Date of Patent: August 3, 2004Assignee: ARCO Chemical Technology, L.P.Inventors: Xiangmin Li, Lawrence M. Candela, Yuan-Zhang Han, Andrew P. Kahn
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Patent number: 6755979Abstract: A propylene oxide/styrene monomer aqueous purge stream is contacted with a catalyst at conditions effective to decompose peroxides contained therein, and oxygen formed by the decomposition swept from the decomposition with a nitrogen vapor stream from ethylbenzene oxidation.Type: GrantFiled: August 15, 2002Date of Patent: June 29, 2004Assignee: ARCO Chemical Technology, L.P.Inventors: Carl L. Williams, Shaw-Chan Lin, David W. Leyshon, Lawrence M. Candela
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Publication number: 20040102656Abstract: The present invention relates to purification of an MTBE process stream by contact in the liquid phase with a large pore zeolite such as 13X or Zeolite Y.Type: ApplicationFiled: November 21, 2002Publication date: May 27, 2004Inventors: Lawrence J. Karas, Lawrence M. Candela, Andrew P. Kahn
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Publication number: 20040031763Abstract: A propylene oxide/styrene monomer aqueous purge stream is contacted with a catalyst at conditions effective to decompose peroxides contained therein, and oxygen formed by the decomposition swept from the decomposition with a nitrogen vapor stream from ethylbenzene oxidation.Type: ApplicationFiled: August 15, 2002Publication date: February 19, 2004Inventors: Carl L. Williams, Shaw-Chan Lin, David W. Leyshon, Lawrence M. Candela
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Patent number: 5639928Abstract: The present invention relates to the improved liquid phase dehydration of 1-phenyl ethanol to styrene monomer, the improvement comprising the use of a residue formation inhibiting agent during the liquid phase dehydration.Type: GrantFiled: August 26, 1994Date of Patent: June 17, 1997Assignee: ARCO Chemical Technology, L.P.Inventors: Walter S. Dubner, Lawrence M. Candela
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Patent number: 5439657Abstract: The present invention relates to the separation of molybdenum from epoxidation process streams by extraction with water insoluble tertiary amine.Type: GrantFiled: May 16, 1994Date of Patent: August 8, 1995Assignee: Arco Chemical Technology, L.P.Inventors: Tim T. Wong, Lawrence M. Candela
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Patent number: 5194067Abstract: A process is provided whereby the hydrogen peroxide-containing oxidate from methyl benzyl alcohol oxidation is extracted with water and with ethyl benzene extractive solvent and an aqueous hydrogen peroxide phase is separated from an ethyl benzene solvent phase which also contains methyl benzyl alcohol and acetophenone, the improvement being that ethyl benzene is introduced into the extraction zone below the point of introduction of the oxidate, thus avoiding the possibility of formation of an aqueous hydrogen peroxide phase concentrated to a hazardous degree in hydrogen peroxide in the extraction zone.Type: GrantFiled: June 29, 1992Date of Patent: March 16, 1993Assignee: Arco Chemical Technology, L.P.Inventors: Rajendra S. Albal, Robert N. Cochran, David W. Leyshon, Lawrence M. Candela
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Patent number: 5039508Abstract: Hydrogen peroxide is produced by liquid phase molecular oxygen oxidation of methyl benzyl alcohol, the reaction being carried out such that the oxygen absorption rate is 90% or more of the maximum at the reaction conditions and the exit gas oxygen partial pressure is not greater than 3.0, the minimum necessary to establish the maximum oxygen absorption rate.Type: GrantFiled: July 19, 1990Date of Patent: August 13, 1991Assignee: ARCO Chemical Technology, Inc.Inventors: Robert N. Cochran, Lawrence M. Candela