Process for activation or regeneration of nickel catalyst
AssigneeE. I. Du Pont de Nemours and Company
InventorsHenry E. Bryndza, Albert L. Casalnuovo
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Abstract
This invention concerns the use of M[BR.sub.3 H].sub.y reagents for activating or regenerating deactivated or degraded Ni catalyst used in Ni-catalyzed alkene hydrocyanation processes in the presence of an organic phosphorus compound, where M is an electropositive ion excluding nickel, such as, but not limited to, the Group 1A cations, the Group IIA cations, the lanthanide cations and the quaternary ammoniums and R is an organic radical of up to 18 carbon atoms, and where y is equal to the net charge of the cation. The invention also concerns a process for activation or regeneration of Ni-catalysts using MH and a catalytic amount of BR.sub.3.
Claims35
A process for regenerating degraded nickel hydrocyanation catalysts consisting of contacting a degraded nickel compound with a borohydride compound of the formula M(BR.sub.3 H).sub.y and a phosphorus compound of the formula P(OR').sub.3 under an inert atmosphere, wherein M is an electropositive ion excluding nickel, y is equal to the net charge of the electropositive ion, and R and R' aryl or alkyl of up to 8 carbon atoms, carried out within a temperature range of 0.degree. C. to 80.degree. C., in the presence of a solvent and wherein each equivalent of degraded Ni compound is treated with 2-6 equivalents of M()Br.sub.3 H).sub.y and 4-10 equivalents of P(OR').sub.3.
A process for activating nickel hydrocyanation catalysts consisting of contacting an inactive nickel compound with a borohydride compound of the formula M(BR.sub.3 H).sub.y and a phosphorus compound of the formula P(OR').sub.3 under an inert atmosphere, wherein M is an electropositive ion excluding nickel, y is equal to the net charge of the electropositive ion, and R and R' are aryl or alkyl of up to 18 carbon atoms, carried out within a temperature range of 0.degree. C. to 80.degree. C., in the presence of a solvent and wherein each equivalent of inactive Ni compound is treated with 2-6 equivalents of M(BR.sub.3 H).sub.y and 4-10 equivalents of P(OR').sub.3.
A process for regenerating or activating nickel hydrocyanation catalysts consisting of contacting an inactive nickel compound with a hydride compound of the formula MH.sub.y, a boron compound of the formula BR.sub.3, and a phosphorus compound of the formula P(OR').sub.3 under an inert atmosphere wherein M is an electropositive ion excluding nickel, and R and R' are aryl or alkyl having up to 18 carbon atoms, carried out within a temperature range of 0.degree. C. to 80.degree. C., in the presence of a solvent and wherein each equivalent of inactive nickel compound is treated with 2-10 equivalent of MH.sub.y, 0.01 to 2.0 equivalents of BR.sub.3, and 4-10 equivalents of P(OR').sub.3.
Dependencies are inferred from the claim text.