Patents by Inventor William J. Tenn
William J. Tenn 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: 9296768Abstract: The invention provides a method of forming a phosphonate diester compound from a ligand hydrolysis product (LHP) of a phosphite ligand used in a nickel-phosphite hydrocyanation catalyst, such as for conversion of 3-pentenenitrile to adiponitrile, which serves to eliminate acidic LHP compound for a hydrocyanation reaction milieu where the acidic LHP can catalyze further catalyst ligand destruction. The invention further provides phosphonate disester compounds prepared by alkylation of diarylphosphite LHP in the presence of a nickel-phosphite catalyst comprising a bidentate ligand, and a continuous hydrocyanation process for production of adiponitrile wherein catalyst ligand breakdown is inhibited through inactivation of ligand hydrolysis products towards further breakdown. A method of stabilizing a hydrocyanation catalyst is provided.Type: GrantFiled: May 24, 2013Date of Patent: March 29, 2016Assignee: INVISTA North America S.a r.l.Inventor: William J. Tenn, III
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Publication number: 20160083406Abstract: Disclosed herein are methods for recovering diphosphonite-containing compounds from mixtures comprising organic mononitriles and organic dinitriles, using liquid-liquid extraction. Also disclosed are treatments to enhance extractability of the diphosphonite-containing compounds.Type: ApplicationFiled: December 8, 2015Publication date: March 24, 2016Applicant: INVISTA NORTH AMERICA S.A R.L.Inventors: William J. TENN, III, Sudhir N.V.K. AKI, Thomas E. VOS, Tseng H. CHAO
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Publication number: 20150368189Abstract: Pentenenitrile oligomers formed in a process for isomerizing cis-2-pentenenitrile to 3-pentenenitrile are minimized in the presence of an aluminium oxide catalyst. The process comprises providing an aluminium oxide catalyst having an alkali metal and/or alkaline earth metal and/or iron content, measured in the form of alkali metal oxide and/or alkaline earth metal oxide and/or iron oxide, respectively of less than 5000 ppm by weight.Type: ApplicationFiled: December 5, 2013Publication date: December 24, 2015Applicant: INVISTA NORTH AMERICA S.A R.L.Inventors: Sudhir N.V.K. AKI, William J. TENN, III, Thomas E. VOS
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Publication number: 20150299106Abstract: Disclosed is a process for isomerizing cis-2-pentenenitrile to 3-pentenenitrile in the presence of a non-aluminium metal oxide catalyst, wherein: (a) the metal in the catalyst has an oxidation state in the range from +1 to +4; (b) the metal has a cation radius in the range from 0.35 to 1.0 ?; (c) the metal of the catalyst has a polarising power, C/r, is in the range from 2 to >8, wherein C is the charge of the metal and r is the ionic radius in ?; (d) the bond network of the catalyst has a % ionicity of >20; (e) the metal oxide has an acidity strength in the range from strong to very weak; and (f) the metal oxide has a basicity (nucleophilicity) strength of weak to strong.Type: ApplicationFiled: December 5, 2013Publication date: October 22, 2015Applicant: INVISTA NORTH AMERICA S.A R.L.Inventors: Sudhir N.V.K. AKI, William J. TENN, III, Thomas E. VOS
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Patent number: 9133226Abstract: Disclosed herein are methods for recovering diphosphite-containing compounds from mixtures comprising organic mononitriles and organic dinitriles, using liquid-liquid extraction. Also disclosed are pre-treatments to enhance extractability of the diphosphite-containing compounds.Type: GrantFiled: November 20, 2012Date of Patent: September 15, 2015Assignee: INVISTA North America S.a.r.l.Inventor: William J. Tenn, III
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Patent number: 9133223Abstract: Disclosed herein are methods for recovering diphosphite-containing compounds from mixtures comprising organic mononitriles and organic dinitriles, using liquid-liquid extraction. Also disclosed are treatments to enhance extractability of the diphosphite-containing compounds.Type: GrantFiled: November 20, 2012Date of Patent: September 15, 2015Assignee: INVISTA North America S.a.r.l.Inventor: William J. Tenn, III
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Publication number: 20150158812Abstract: A process of stabilizing a bidentate or tridentate phosphorus-based phosphite ester ligand or mixture thereof in a hydrocyanation reaction milieu comprising water, wherein the ligand or ligand mixture comprises one or more of (i) a bidentate biphosphite ligand of formula (III), (R12—X12) (R13—X13) P—X14—Y—X24—P(X22—R22) (X23—R23) or (ii) a tridentate triphosphite ligand of formula (IIIA) (R12—X12) (R13—X13) P—X14—Y—X32—P(X34—R34)—(X33—Y2—R24—P(X23—R23)—(X22—R22) where each X is oxygen or a bond and each Y is an optionally substituted C6-C20 arylene group, comprising admixing the bidentate and/or tridentate with a stabilizing amount of one or more monodentate phosphite ligand of formula P(X1—R1)(X2—R2)(X3—R3) where each X is oxygen or a bond, wherein the monodentate ligand has a rate of hydrolysis greater than the rate of hydrolysis of the bidentate or tridentate ligand in the presence of water in a hydrocyanation reaction milieu, and thereby preserve concentrations and proportions of the bidentate and/or tridType: ApplicationFiled: May 24, 2013Publication date: June 11, 2015Applicant: INVISTA NORTH AMERICA S.A R.L.Inventors: Sudhir Aki, William J. Tenn, III, Thomas E. Vos
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Publication number: 20150148556Abstract: The invention provides a method of forming a phosphonate diester compound from a ligand hydrolysis product (LHP) of a phosphite ligand used in a nickel-phosphite hydrocyanation catalyst, such as for conversion of 3-pentenenitrile to adiponitrile, which serves to climinate acidic LHP compound for a hydrocyanation reaction milieu where the acidic LHP can catalyze further catalyst ligand destruction. The invention further provides phosphonate disester compounds prepared by alkylation of diarylphosphite LHP in the presence of a nickel-phosphite catalyst comprising a bidentate ligand, and a continuous hydrocyanation process for production of adiponitrile wherein catalyst ligand breakdown is inhibited through inactivation of ligand hydrolysis products towards further breakdown. A method of stabilizing a hydrocyanation catalyst is provided.Type: ApplicationFiled: May 24, 2013Publication date: May 28, 2015Applicant: INVISTA NORTH AMERICA S.A R.L.Inventor: William J. Tenn, III
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Patent number: 9040735Abstract: The present invention relates to a process for hydrocyanating 3-pentenenitrile. The process can include feeding 3-pentenenitrile and HCN to a hydrocyanation reaction zone that includes a Lewis acid promoter, nickel, and a phosphorus-containing ligand. In various embodiments, the process can also include controlling water concentration within the hydrocyanation reaction zone sufficient to maintain a high activity of the ligand catalyst complex while recycling at least a portion of the ligand catalyst complex.Type: GrantFiled: October 4, 2012Date of Patent: May 26, 2015Assignee: INVISTA North America S.a.r.l.Inventors: Sudhir Aki, Wyatte E. Allen, Mark Anstrom, Charles Nelson Campbell, II, Tseng Chao, James E. McIntosh, Larry E. Moerbe, Bruce Edwin Murphree, Mark D. Rogers, William J. Tenn, III, Thomas E. Vos, Michael W. Wensing
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Patent number: 9011691Abstract: Disclosed herein are methods for recovering diphosphite-containing compounds from mixtures comprising organic mononitriles and organic dinitriles, using liquid-liquid extraction. Also disclosed are treatments to enhance extractability of the diphosphite-containing compounds.Type: GrantFiled: November 20, 2012Date of Patent: April 21, 2015Assignee: INVISTA North America S.a.r.l.Inventors: William J. Tenn, III, Sudhir N. V. K. Aki, Tseng H. Chao, Thomas E. Vos
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Publication number: 20140378693Abstract: Disclosed herein are methods for recovering diphosphite-containing compounds from mixtures comprising organic mononitriles and organic dinitriles, using liquid-liquid extraction. Also disclosed are treatments to enhance extractability of the diphosphite-containing compounds.Type: ApplicationFiled: November 20, 2012Publication date: December 25, 2014Applicant: INVISTA North America S.a.r.l.Inventor: William J. Tenn, III
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Publication number: 20140364638Abstract: Disclosed herein are methods for recovering diphosphite-containing compounds from mixtures comprising organic mononitriles and organic dinitriles, using liquid-liquid extraction. Also disclosed are treatments to enhance extractability of the diphosphite-containing compounds.Type: ApplicationFiled: November 20, 2012Publication date: December 11, 2014Applicant: INVISTA North America S.a.r.l.Inventor: William J. Tenn
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Publication number: 20140350280Abstract: Disclosed herein are methods for recovering diphosphite-containing compounds from mixtures comprising organic mononitriles and organic dinitriles, using liquid-liquid extraction. Also disclosed are treatments to enhance extractability of the diphosphite-containing compounds.Type: ApplicationFiled: November 20, 2012Publication date: November 27, 2014Applicant: INVISTA North America S.a.r.l.Inventor: William J. Tenn, III
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Publication number: 20140316153Abstract: Disclosed herein are methods for recovering diphosphite-containing compounds from mixtures comprising organic mononitriles and organic dinitriles, using liquid-liquid extraction. Also disclosed are pre-treatments to enhance extractability of the diphosphite-containing compounds.Type: ApplicationFiled: November 20, 2012Publication date: October 23, 2014Applicant: INVISTA North America S.a.r.l.Inventor: William J. Tenn
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Publication number: 20140235887Abstract: The present invention relates to a process for hydrocyanating 3-pentenenitrile. The process can include feeding 3-pentenenitrile and HCN to a hydrocyanation reaction zone that includes a Lewis acid promoter, nickel, and a phosphorus-containing ligand. In various embodiments, the process can also include controlling water concentration within the hydrocyanation reaction zone sufficient to maintain a high activity of the ligand catalyst complex while recycling at least a portion of the ligand catalyst complex.Type: ApplicationFiled: October 4, 2012Publication date: August 21, 2014Applicant: INVISTA NORTH AMERICA S.A R.L.Inventors: Sudhir Aki, Wyatte E. Allen, Mark Anstrom, Charles Nelson Campbell, Tseng Chao, James E. Mcintosh, Larry E. Moerbe, Bruce Edwin Murphree, Mark D. Rogers, William J. Tenn, Thomas E. Vos, Michael W. Wensing