Sigridur Soley Kristjansdottir

US Patent:

6855799, Feb 15, 2005

Filed:

May 25, 2001

Appl. No.:

09/865942

Inventors:

Wilson Tam - Boothwyn PA, US
Sigridur Soley Kristjansdottir - Wilmington DE, US
Robin Nikolas Greene - Wilmington DE, US

International Classification:

C08G063/692

US Classification:

528287, 528398, 528491, 525418, 525420, 525434, 525437

Abstract:

A polymeric composition, a process for producing the composition, and a process for using the composition in, for example, hydrocyanation or isomerization are disclosed. The composition comprises repeat units derived from (1) a carbonyl compound, a monomer, and phosphorochloridite; (2) phosphorus trichloride, a polyhydric alcohol, and an aromatic diol; or (3) combinations of (1) and (2) in which the monomer can be a polyhydric alcohol, an amine, combinations thereof. The composition can further comprise a Group VIII metal and optionally a Lewis acid. The composition can be produced by (1) contacting a carbonyl compound with the monomer to produce an intermediate and contacting the intermediate with phosphorochloridite; (2) contacting phosphorus trichloride with a second polyhydric alcohol under a condition sufficient to produce a phosphorus-containing polymer and contacting the phosphorus-containing polymer with an aromatic diol; or (3) contacting an N,N-dialkyl dichlorophosphoramidite with a second polyhydric alcohol to produce a polymer phosphoramidite, contacting the polymer phosphoramidite with an acid such as HCl to produce the phospphorus-containing polymer, which is then contacted with an aromatic diol. The composition can be used as catalyst, for example, for converting an unsaturated organic compound to a nitrile and isomerizing a nitrile.

US Patent:

7709673, May 4, 2010

Filed:

Jul 12, 2007

Appl. No.:

11/776922

Inventors:

Thomas Foo - Wilmington DE, US
Sigridur S. Kristjansdottir - Wilmington DE, US
Ronald J. McKinney - Wilmington DE, US
Ron Ozer - Wilmington DE, US

Assignee:

Invista North America S.A R.L. - Wilmington DE

International Classification:

C07C 253/00

US Classification:

558332

Abstract:

The invention provides a continuous process for the production of 3-pentenenitrile comprising:.

US Patent:

7880028, Feb 1, 2011

Filed:

Jul 12, 2007

Appl. No.:

11/776932

Inventors:

Thomas Foo - Wilmington DE, US
Sigridur S. Kristjansdottir - Wilmington DE, US
Ronald J. McKinney - Wilmington DE, US
Ron Ozer - Wilmington DE, US
Paul S. Pearlman - Thornton PA, US

Assignee:

Invista North America S.A R.L. - Wilmington DE

International Classification:

C07C 253/10

US Classification:

558338, 558335

Abstract:

The invention provides a continuous process for the production of 3-pentenenitrile, comprising:.

US Patent:

7977502, Jul 12, 2011

Filed:

Jan 14, 2009

Appl. No.:

12/353410

Inventors:

Thomas Foo - Wilmington DE, US
Sigridur S. Kristjansdottir - Wilmington DE, US
Ronald J. McKinney - Wilmington DE, US
Ron Ozer - Arden DE, US
Paul S. Pearlman - Thornton PA, US

Assignee:

Invista North America S.A R.L. - Wilmington DE

International Classification:

C07C 253/10

US Classification:

558338

Abstract:

The invention provides an integrated, continuous process for the production of 3-pentenenitrile, the refining of 3-pentenenitrile, and the refining of 2-methyl-3-butenenitrile, the process comprising:.

US Patent:

8030422, Oct 4, 2011

Filed:

Aug 16, 2006

Appl. No.:

11/505270

Inventors:

Michael Charles Grady - Oaklyn NJ, US
Sigridur Soley Kristjansdottir - Wilmington DE, US
Christina M. Older - Wilmington DE, US
Matthew Arthur Page - Wilmington DE, US
Joachim C. Ritter - Wilmington DE, US
Wilson Tam - Boothwyn PA, US

Assignee:

E. I. du Pont de Nemours and Company - Wilmington DE

International Classification:

C08F 4/60
C07F 4/70
C08F 4/80

US Classification:

526172, 5261691, 526904, 526 69, 5263297, 526318, 5263184, 5263031, 526341, 526332, 526346, 526344, 526279, 502171

Abstract:

Disclosed herein are novel polymer-tethered ligands, metal complexes comprising these ligands, and the use of these complexes as chain transfer catalysts to control the molecular weight of oligomeric and polymeric materials produced in a radical polymerization process. The materials made by the processes disclosed herein have significantly reduced color, making them suitable for a wide range of color-critical end-uses, including automotive coatings.

US Patent:

8148491, Apr 3, 2012

Filed:

Oct 31, 2008

Appl. No.:

12/262626

Inventors:

David C. Confer - Chadds Ford PA, US
Mark Andrew Harmer - Landenberg PA, US
Christian Hoffmann - Newark DE, US
Scott Christopher Jackson - Wilmington DE, US
Sigridur Soley Kristjansdottir - Wilmington DE, US
Rupert Spence - Kingston, CA

Assignee:

E I du Pont de Nemours and Company - Wilmington DE

International Classification:

C08F 6/06
C08F 6/12
C08J 3/11
C08G 65/34

US Classification:

528503, 528425, 528499, 528502 R

Abstract:

This invention relates to a process for preparing polytrimethylene ether glycols or copolymers thereof by a polycondensation reaction using at least one acid catalyst, wherein the temperature of the reaction is controlled such that the average temperature during the first half of the reaction is higher than the average temperature during the second half of the reaction.

US Patent:

20130310567, Nov 21, 2013

Filed:

Jan 27, 2012

Appl. No.:

13/981919

Inventors:

Sigridur Soley Kristjansdottir - Wilmington DE, US
Rafael Shapiro - Wilmington DE, US
Matthew Richard Oberholzer - Wilmington DE, US

Assignee:

EI DU PONT DE NEMOURS AND COMPANY - Wilmington DE

International Classification:

C07C 231/10
C07D 231/14
C07D 401/04

US Classification:

5462754, 564163, 564168, 5483741

Abstract:

A method for preparing a compound of Formula 1 comprising contacting a compound of Formulae 2 and 3 in the presence of a palladium source, a ligand, a base and carbon monoxidewherein R, R, X and Rare as defined in the disclosure.A method for preparing a compound of Formula 5 wherein R, R, R, R, R, Rand Z are as defined in the disclosure, using a compound of Formula 1 characterized by preparing a compound of Formula 1 by the method disclosed above or using a compound of Formula 1 prepared by the method above.

US Patent:

54844703, Jan 16, 1996

Filed:

Jul 28, 1994

Appl. No.:

8/281966

Inventors:

Sigridur S. Kristjansdottir - Wilmington DE
Jeffery S. Thompson - Wilmington DE

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

C22B 1108

US Classification:

75722

Abstract:

An improved process for dissolving gold metal in ligand and oxidant lixiviation systems, wherein the solubility of gold is enhanced by the addition of heterocyclic aromatic compounds containing nitrogen or sulfur in the ring.