Patents by Inventor David P. Palmer
David P. Palmer 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: 9255053Abstract: In a method of treating a residue stream from the production of bisphenol-A, the residue stream is contacted with an aqueous solution of a base under conditions effective to hydrolyze at least part of said residue stream into acetone and phenol and produce an effluent stream. Acetone is recovered from the effluent stream to produce a phenol-containing mixed phase stream which is substantially free of acetone and which contains water and unhydrolyzed heavy organic compounds. The phenol-containing mixed phase stream is then treated with a water-immiscible organic solvent to extract phenol and unhydrolyzed heavy organic compounds into said solvent and produce an organic phase containing the solvent, phenol and unhydrolyzed heavy aromatic compounds and an aqueous phase with reduced concentrations of phenol and unhydrolyzed heavy organic compounds. At least part of the phenol and the organic solvent are subsequently recovered from the organic phase.Type: GrantFiled: June 4, 2012Date of Patent: February 9, 2016Assignee: BADGER LICENSING LLCInventors: David P. Palmer, Steven D. Evitt, Stephen W. Fetsko, Chung-Ming Chi
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Patent number: 8431749Abstract: In a method of recovering phenol and acetone from a feed stream containing bisphenol-A and isomers thereof, the feed stream is contacted with water and a source of hydroxyl ions under conditions effective to decompose at least part of said bisphenol-A and isomers thereof to phenol and acetone. The conditions include a temperature of about 150° C. to about 300° C., a pressure sufficient to keep the water substantially in the liquid phase at said temperature, and a molar ratio of hydroxyl ions to hydroxyphenyl groups in the residue stream from about 0.3:1 to about 0.9:1.Type: GrantFiled: June 6, 2011Date of Patent: April 30, 2013Assignee: Badger Licensing LLCInventors: David P. Palmer, Steven D. Evitt, Stephen W. Fetsko, Chung-Ming Chi
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Publication number: 20120310015Abstract: In a method of recovering phenol and acetone from a feed stream containing bisphenol-A and isomers thereof, the feed stream is contacted with water and a source of hydroxyl ions under conditions effective to decompose at least part of said bisphenol-A and isomers thereof to phenol and acetone. The conditions include a temperature of about 150° C. to about 300° C., a pressure sufficient to keep the water substantially in the liquid phase at said temperature, and a molar ratio of hydroxyl ions to hydroxyphenyl groups in the residue stream from about 0.3:1 to about 0.9:1.Type: ApplicationFiled: June 6, 2011Publication date: December 6, 2012Applicant: BADGER LICENSING LLCInventors: David P. PALMER, Steven D. EVITT, Stephen W. FETSKO, Chung-Ming CHI
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Publication number: 20120310014Abstract: In a method of treating a residue stream from the production of bisphenol-A, the residue stream is contacted with an aqueous solution of a base under conditions effective to hydrolyze at least part of said residue stream into acetone and phenol and produce an effluent stream. Acetone is recovered from the effluent stream to produce a phenol-containing mixed phase stream which is substantially free of acetone and which contains water and unhydrolyzed heavy organic compounds. The phenol-containing mixed phase stream is then treated with a water-immiscible organic solvent to extract phenol and unhydrolyzed heavy organic compounds into said solvent and produce an organic phase containing the solvent, phenol and unhydrolyzed heavy aromatic compounds and an aqueous phase with reduced concentrations of phenol and unhydrolyzed heavy organic compounds. At least part of the phenol and the organic solvent are subsequently recovered from the organic phase.Type: ApplicationFiled: June 4, 2012Publication date: December 6, 2012Applicant: BADGER LICENSING LLCInventors: David P. PALMER, Steven D. EVITT, Stephen W. FETSKO, Chung-Ming CHI
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Patent number: 8088956Abstract: The present disclosure enables phenol recovery, purification and recycle in a simple, economic manner from waste streams from, for example, a phenol/acetone production process, e.g., a phenol/acetone plant or an upstream cumene hydroperoxide cleavage process step, and BPA production step, for use in the reaction with acetone to produce BPA. The disclosure therefore reduces the overall consumption of phenol in the production of BPA.Type: GrantFiled: January 14, 2011Date of Patent: January 3, 2012Assignee: Stone & Webster, IncInventor: David P. Palmer
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Patent number: 8044248Abstract: In a method of reducing the viscosity of a residue stream from the production of bisphenol-A, the residue stream is combined with at least one of (a) a bottoms stream comprising polyalkylaromatic compounds and remaining after the fractionation of an effluent from an aromatics alkylation process to remove monoalkylaromatic compounds, (b) a stream containing at least 90 wt % phenol and (c) a mixture of phenol and said bottoms stream (a) to produce a combined stream.Type: GrantFiled: March 3, 2009Date of Patent: October 25, 2011Assignee: Badger Licensing LLCInventor: David P. Palmer
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Publication number: 20110112333Abstract: The present disclosure enables phenol recovery, purification and recycle in a simple, economic manner from waste streams from, for example, a phenol/acetone production process, e.g., a phenol/acetone plant or an upstream cumene hydroperoxide cleavage process step, and BPA production step, for use in the reaction with acetone to produce BPA. The disclosure therefore reduces the overall consumption of phenol in the production of BPA.Type: ApplicationFiled: January 14, 2011Publication date: May 12, 2011Applicant: STONE & WEBSTER, INCInventor: David P. Palmer
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Patent number: 7902408Abstract: The present disclosure enables phenol recovery, purification and recycle in a simple, economic manner from waste streams from, for example, a phenol/acetone production process, e.g., a phenol/acetone plant or an upstream cumene hydroperoxide cleavage process step, and BPA production step, for use in the reaction with acetone to produce BPA. The disclosure therefore reduces the overall consumption of phenol in the production of BPA.Type: GrantFiled: May 1, 2008Date of Patent: March 8, 2011Assignee: Stone & Webster, Inc.Inventor: David P. Palmer
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Publication number: 20080281129Abstract: The present disclosure enables phenol recovery, purification and recycle in a simple, economic manner from waste streams from, for example, a phenol/acetone production process, e.g., a phenol/acetone plant or an upstream cumene hydroperoxide cleavage process step, and BPA production step, for use in the reaction with acetone to produce BPA. The disclosure therefore reduces the overall consumption of phenol in the production of BPA.Type: ApplicationFiled: May 1, 2008Publication date: November 13, 2008Inventor: David P. Palmer