E.i. Dupont De Nemours and Company

Dsm N.v.

Anne Irisa Breikss

Wilson Tam

Patrick M Burke

Thomas Foo

James Michael Garner

Richard E Ernst

Leon S Scott

James D Verbsky

Peter A Bloxham

John D Super

The invention relates to a process for the preparation of linear aldehydes by hydroformylation of ethylenically unsaturated organic compounds in the presence of a catalyst system comprising a Group VIII metal and a bidentate organic ligand. The bidentate organic ligand is characterized in that it has two trivalent phosphorus atoms each containing at least one P--C or one P--N bond.

Process to prepare a linear aldehyde

Described herein is a process for the hydrocyanation of diolefins by employing a catalyst comprising the combination of a zero-valent nickel compound and certain bidentate phosphorus compounds, and a process for isomerizing 2-alkyl-3-monoalkenenitrile to form linear nitriles by the use of such catalyst.

Process for hydrocyanation of diolefins and isomerization of

A process for removing precursors, such as low boiling alkyl glycols (e.g., ethylene glycol and/or 1,2-propylene glycol), to undersirable color forming acetal impurities (e.g., 1,3 -dioxolane and 4-methyl-1,3-dioxolane) from technical grade 1,4-butanediol/2-methyl-1,4-butanediol mixtures and the like by distillative topping of the diol mixture prior to ring closing cyclization to corresponding tetrahydrofuran/3-methyl tetrahydrofuran mixture and subsequent polymerization to polytetramethylene glycol ether polymers. Such a process is useful to produce THF and PTMEG having a APHA color index of nearly zero.

Method for controlling color formation during polytetramethylene ether

A process for hydrocyanation of certain ethylenically unsaturated compounds which uses a catalyst composition comprising certain bidentate phosphorous compounds and zero-valent nickel in the presence of a Lewis Acid promoter.

Process for hydrocyanation

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Hockessin, DE, United States of America

Anne Irisa Breikss