A process for recovering a catalyst and adiponitrile from a mixture comprising adiponitrile, 3-pentenenitrile, a Lewis acid and a catalyst, said process comprising the steps of: (a) providing a countercurrent multistage extraction zone comprising at least three mixer-settlers connected in series; (b) introducing said mixture comprising ADN, 3PN, Lewis acid and a catalyst to a first terminal mixer-settler in the series; (c) introducing an extraction solvent into the second terminal mixer-settler in the series; (d) forming a light phase comprising extraction solvent and a heavy phase comprising ADN and 3PN in the settling sections of each of the mixer-settlers; (e) flowing the heavy phase progressively from the first terminal mixer-settler through each of the mixer-settlers and into the second terminal mixer-settler; (f) flowing the light phase progressively from the second terminal mixer-settler through each of the mixer-settlers and into the first terminal mixer-settler; (g) withdrawing the light phase comprising extraction solvent and extracted catalyst from the first terminal mixer-settler; (h) withdrawing the heavy phase comprising ADN and 3PN from the second terminal mixer-settler; (i) distilling the withdrawn light phase from step (g) to separate extraction solvent from catalyst; (j) distilling the withdrawn heavy phase from step (h) to separate ADN from 3PN, wherein the catalyst comprises zero valent nickel and a phosphorus-containing ligand; and (k) removing precipitate comprising a complex of the Lewis acid with the polyamine from the heavy phase withdrawn in step (h), followed by (l) separating ADN from 3PN, wherein a polyamine is added to the mixing section of the first terminal mixer-settler to form a precipitate comprising a complex of the Lewis acid with the polyamine, wherein the precipitate is dispersed in the heavy phase in the settling section of the first mixer-settler, wherein the precipitate is entrained in the flow of heavy phase through the series of mixer-settlers, and wherein the precipitate is withdrawn from the second terminal mixer-settler, along with the heavy phase. (a) providing a countercurrent multistage extraction zone comprising at least three mixer-settlers connected in series; (b) introducing said mixture comprising ADN, 3PN, Lewis acid and a catalyst to a first terminal mixer-settler in the series; (c) introducing an extraction solvent into the second terminal mixer-settler in the series; (d) forming a light phase comprising extraction solvent and a heavy phase comprising ADN and 3PN in the settling sections of each of the mixer-settlers; (e) flowing the heavy phase progressively from the first terminal mixer-settler through each of the mixer-settlers and into the second terminal mixer-settler; (f) flowing the light phase progressively from the second terminal mixer-settler through each of the mixer-settlers and into the first terminal mixer-settler; (g) withdrawing the light phase comprising extraction solvent and extracted catalyst from the first terminal mixer-settler; (h) withdrawing the heavy phase comprising ADN and 3PN from the second terminal mixer-settler; (i) distilling the withdrawn light phase from step (g) to separate extraction solvent from catalyst; (j) distilling the withdrawn heavy phase from step (h) to separate ADN from 3PN, wherein the catalyst comprises zero valent nickel and a phosphorus-containing ligand; and (k) removing precipitate comprising a complex of the Lewis acid with the polyamine from the heavy phase withdrawn in step (h), followed by (l) separating ADN from 3PN,