Invista North America S.a.r.l.

Invista Technologies S.a.r.l.

Keith Whiston

Kenneth Richard Seddon

Vinay Medhekar

Stewart Forsyth

Joan Fraga-Dubreuil

Thomas A Micka

John Arthur Turner

Alberto V Puga

John Joseph Ostermaier

Thomas E Vos

Martyn Poliakoff

Charles Richard Langrick

Paul Anthony Hamley

Sudhir Aki

Colin S Slaten

Tayeb Belhocine

William Barry Thomas

Eduardo Cepeda Garcia-Verdugo

Alberto Vaca Puga

Kenneth R Seddon

Disclosed are nickel-containing complexation precursors having high complexation activity for bidentate phosphite ligands. Also disclosed are methods of making the complexation precursors. The disclosed method of generating the nickel-containing complexation precursor includes including contacting a nickel starting material with a reductant under conditions sufficient to generate a nickel-containing complexation precursor having at least about 1,500 ppmw sulfur in the form of sulfide.

Nickel having high ligand-complexation activity and methods for making the same

As described herein, nickel treated with sulfur provides a surprisingly effective source of nickel atoms for generating nickel-phosphorus-containing ligand complexes useful as hydrocyanation catalysts.

Metal-ligand catalyst formation

A novel nickel particulate form is provided that efficiently forms a zero-valent nickel complex with a phosphorus-containing ligands in an organic liquid to form a hydrocyanation catalyst. Particles in the nickel particulate form comprise nickel crystallites. For example, the nickel particulate form can have a BET Specific Surface Area of at least about 1 m/gm; an average crystallite size less than about 20-25 nm, the nickel particulate form can have at least 10% of the crystallites in the nickel form can have can have a diameter (C10) of less than about 10 nm, and/or there are on average at least about 10surface crystallites per gram nickel. A ratio of BET SSA to C50 for the nickel particulate form can be at least about 0.1&#xd7;10m/gm and preferably at least about 0.4&#xd7;10m/gm. Methods of preparation and use are also provided.

Nickel form for preparation of catalytic nickel-ligand complexes

Claimed is a process for producing a phosphorus-containing ligand, preferably a diphosphite ligand structure (DLS) such as structure I. The method includes contacting a phosphorochloridite (structure II) with a compound having the structure X&#x2014;OH (which can be a bisaryl compound), and a tertiary organic amine to provide structure I' and as preferred embodiment structure I. 

Method for making organodiphosphites from phosphorochloridites characterized by measuring side-product levels to determine further additions

A novel nickel particulate form is provided that efficiently forms a zero-valent nickel complex with a phosphorus-containing ligands in an organic liquid to form a hydrocyanation catalyst. Particles in the nickel particulate form comprise nickel crystallites. For example, the nickel particulate form can have a BET Specific Surface Area of at least about 1 m/gm; an average crystallite size less than about 20-25 nm, the nickel particulate form can have at least 10% of the crystallites in the nickel form can have a diameter (C10) of less than about 10 nm, and/or there are on average at least about 10surface crystallites per gram nickel. A ratio of BET SSA to C50 for the nickel particulate form can be at least about 0.1&#xd7;10m/gm and preferably at least about 0.4&#xd7;10m/gm. Methods of preparation and use are also provided.

A process for making a polyamide polymer, said process comprising heating, in one or more ionic liquid(s), one or more polyamide precursor(s) selected from: (i) one or more free dicarboxylic acid(s) or ester(s) thereof, with one or more diamine(s); or (ii) one or more salt(s) of a dicarboxylic acid with a diamine; or (iii) one or more lactam(s); or (iv) mixtures of any of the foregoing precursors (i) to (iii).

Preparation of polyamides

The invention relates to an ionic liquid composition and a method for preparing the ionic liquid. The ionic liquid comprises a cation containing the Formula I, as herein disclosed, and wherein: n is 2, Ris selected from the group consisting of: H, C-Calkyl, aryl or together with Rmay form a heterocyclic ring, and Ris selected from the group consisting of: H, C-Calkyl, aryl or together with Rmay form a heterocyclic ring, and Ris selected from the group consisting of hydrogen and C-Calkyl, and wherein Rand Rare not simultaneously selected from hydrogen.

Ionic liquids

Disclosed is an ionic liquid:   Also disclosed are electrochemical devices and devices employing such electrochemical devices as energy sources.

Low viscosity ionic liquids

An improved process for the hydrolysis of nylon polymer is herein disclosed using ionic liquids and optionally one equivalent of sulfuric acid per amide residue of the polymer. The process provides for a simplified means for separation of the hydrolyzed polyamide constituent monomers.

Ionic liquid solvents and a process for the depolymerization of polyamides

A process for the production of a heteroaromatic carboxylic acid comprising contacting in the presence of a catalyst, a precursor of said carboxylic acid with an oxidant, such contact being effected with said precursor and the oxidant in an aqueous solvent comprising water under supercritical conditions or near supercritical conditions close to the supercritical point.

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Darlington, United Kingdom

Keith Whiston