Oil recovery in wet-spinning process

Claim 1

THE PROCESS WHICH COMPRISES WET SPINNING A SOLUTION OF CELLULOSE TRIESTER IN A SOLVENT INTO A SPIN BATH EXERTING A SWELLING ACTION THEREON TO FORM SWOLLEN FILAMENTS, CONTACTING THE FRESHLY FORMED SWOLLEN FILAMENTS WITH OIL, COLLECTING EXCESS OIL AND SPENT SPIN BATH AS MIXTURE, SAID MIXTURE COMPRISING SOLVENT, WATER AND FINELY DIVIDED CELLULOSE TRIESTER SOLIDS, EVAPORATING AT LEAST A PORTION OF THE MIXTURE TO REMOVE MOST OF THE SOLVENT THEREFROM AND TO LEAVE EVAPORATOR BOTTOMS CONTAINING CELLULOSE TRIESTER, OIL, SOLVENT AND WATER, EVAPORATING OF FROM SAID BOTTOMS SAID SOLVENT AND WATER TO LEAVE A RESIDUE OF CELLULOSE TRIESTER AND OIL, SEPARATING SAID OIL FROM SAID CELLULOSE TRIESTER, TREATING SAID OIL WITH A DECOLORIZING ADSORBENT TO THEREBY DECOLORIZE SAID OIL, AND RECYCLING SAID OIL FOR FURTHER CONTACT WITH FRESHLY FORMED SWOLLEN FILAMENTS.