Membrane separation of homogeneous catalysts from nitrile solutions

Claim 1

A PROCESS FOR THE PERMSELECTIVE SEPARATION OF AN ORGANIC SOLUTION CONTAINING A. A METAL-ORGANO COMPLEX SELECTED FROM THE GROUP CONSISTING OF A. MA1A2A3A4 IN WHICH M IS NI, PD OR PT, AND THE A''S ALIKE OR DIFFERENT, ARE NEUTRAL LIGANDS B. (Z13M1)3M2X1, IN WHICH M2 IS CO OR RH, X1 IS H, CL, BR, 1 OR CN, Z13M1 IS A NEUTRAL LIGAND IN WHICH M1 IS P, AS OR SB, AND Z1 IS R OR OR; C. RUX2MLN1, IN WHICH X IS CL, BR, I OR A CARBOXYLATE, L IS A SATURATED MONONITRILE A MONOUNSATURATED MONONITRILE, AN AMINE, WATER, AN ALCOHOL OF TWO TO EIGHT CARBON ATOMS OR AN AROMATIC MONONITRILE, M IS 2 OR 3, N IS 0 TO 4; D. HNI(PY1Z2)NX3, IN WHICH Z2 IS R'' OR OR'', IN WHICH R'' IS HYDROCARBYL OF UP TO 18 CARBOM ATOMS OR SUCH HYDROCARBYL SUBSTITUTED WITH -CL, -O-, OR -CN, Y1 IS 2Z2''S OR -R2, OR -O-R2-O-, R2 BEING A HYDROCARBYLENE RADICAL OF UP TO 18 CARBON ATOMS, X3 IS THE ANION OF A PROTONIC ACID; AND N IS 3 OR 4; E. PDX32, IN WHICH X3 IS THE ANION OF A PROTONIC ACID; AND F. BR33, IN WHICH R3 IS A HYDROCRBYL OF SIX OR MORE CARBON ATOMS; B. AT LEAST 3 PERCENT OF AT LEAST ONE ORGANIC HYDROCARBON DERIVATIVE HAVING AT LEAST ONE NITRILE GROUP AND UP TO 12 CARBON ATOMS, WHICH CONSISTS ESSENTIALLY IN CONTACTING ONE SURFACE OF AN ASYMMETRIC PERMSELECTIVE MEMBRANE CONSISTING ESSENTIALLY OF AN AROMATIC POLYIMIDE PREPARED FROM PYROMELLITIC DIANHYDRIDE AND 4,4''-DIAMINODIPHENYL ETHER WITH SAID ORGANIC SOLUTION UNDER PRESSURE AND RECOVERING FROM THE OTHER SIDE OF THE MEMBRANE FLUID WHICH HAS PASSED THROUGH THE MEMBRANE.