1. A PROCESS FOR THE PRODUCTION OF HIGH MOLECULAR WEIGHT POLYETHYLENE TEREPHTHALATE UTILIZING WASTE POLYETHYLENE TEREPHTHALATE WHCIH COMPRISES (A) FORMING A MELT OF A LOW MOLECULAR WEIGHT POLYETHYLENE TEREPHTHALATE PRECONDENSATE AND HIGH MOLECULAR WEIGHT POLYETHYLENE TEREPHTHALATE WASTE, SAID MIXTURE HAVING A VISCOSITY NUMBER OF GREATER THAN 0.03, SAID WASTE HAVING A VISCOSITY NUMBER BETWEEN 0.08 AND 0.088 AND SAID PRECONDENSATE HAVING A VISCOSITY NUMBER BETWEEN 0.01 AND 0.012 AND (B) POLYCONDENSING SAID MIXTURE AT A TEMPERATURE BETWEEN 305 AND 315*C. BY FALLING-FILM EVAPORATION IN A FIRST ZONE AT A PRESSURE OF FROM 25 TO 18 MM. MERCURY AND THEREAFTER IN A SECOND ZONE AT A PRESSURE LESS THAN 0.5 MM. MERCURY.