Abstract 1. A PROESS FOR DEWATERING ACRYLONITRILE POLYMER CRUMB CONTAINING AT LEAST ABOUT 50% COMBINED ACRYLONITRILE PRODUCED BY POLYMERIZING ACRYLONITRILE, ALONE OR WITH OTHER MONOETHYLENICALLY UNSATURATED COMONOMERS COPOLYMERIZABLE THEREWITH, IN AN AQUEOUS MEDIUM COMPRISING: (A) HEATING AN AQUEOUS SLURRY OF SAID ACRYLONITRILE POLYMER CRUMB, SAID SLURRY CONTAINING SUFFICIENT WATER TO ENSURE THAT SAID SLURRY REMAINS EAISLY FLOWABLE, TO A TEMPERATURE ABOVE THE MINIMUM MELTING TEMPERATURE OF SAID POLYMER IN THE PRESENCE OF WATER BUT NOT MORE THAN ABOUT 20*C ABOVE SAID MINIMUM MELTING TEMPERATURE FOR A TIME SUFFICIENT FOR MELTING TO OCCUR WHILE UNDER A PRESSURE AT LEAST EQUAL TO THE VAPOR PRESURE OF WATER AT THE SLURRY TEMPERATURE AND WHILE AGITATING SAID SLURRY SUFFICIENTLY TO PROVENT SUBSTANTIAL COALESCENCE OF SAID MINIMUM (B) THEN COOLING SAID SLURRY TO BELOW SAID MINIMUM MELTING TEMPERATURE WHILE CONTINUING TO AGITATE SAID SLURRY SUFFICIENTLY TO PREVENT SUBSTANTIAL COALESCENCE OF SAID POLYMER PARTICLES, AND (C) THEREAFTER SEPARATING THE RESULTANT POLYMER PARTICLES FROM THE EXCESS LIQUID OF THE SLURRY.
A PROESS FOR DEWATERING ACRYLONITRILE POLYMER CRUMB CONTAINING AT LEAST ABOUT 50% COMBINED ACRYLONITRILE PRODUCED BY POLYMERIZING ACRYLONITRILE, ALONE OR WITH OTHER MONOETHYLENICALLY UNSATURATED COMONOMERS COPOLYMERIZABLE THEREWITH, IN AN AQUEOUS MEDIUM COMPRISING: (A) HEATING AN AQUEOUS SLURRY OF SAID ACRYLONITRILE POLYMER CRUMB, SAID SLURRY CONTAINING SUFFICIENT WATER TO ENSURE THAT SAID SLURRY REMAINS EAISLY FLOWABLE, TO A TEMPERATURE ABOVE THE MINIMUM MELTING TEMPERATURE OF SAID POLYMER IN THE PRESENCE OF WATER BUT NOT MORE THAN ABOUT 20*C ABOVE SAID MINIMUM MELTING TEMPERATURE FOR A TIME SUFFICIENT FOR MELTING TO OCCUR WHILE UNDER A PRESSURE AT LEAST EQUAL TO THE VAPOR PRESURE OF WATER AT THE SLURRY TEMPERATURE AND WHILE AGITATING SAID SLURRY SUFFICIENTLY TO PROVENT SUBSTANTIAL COALESCENCE OF SAID MINIMUM (B) THEN COOLING SAID SLURRY TO BELOW SAID MINIMUM MELTING TEMPERATURE WHILE CONTINUING TO AGITATE SAID SLURRY SUFFICIENTLY TO PREVENT SUBSTANTIAL COALESCENCE OF SAID POLYMER PARTICLES, AND (C) THEREAFTER SEPARATING THE RESULTANT POLYMER PARTICLES FROM THE EXCESS LIQUID OF THE SLURRY.
Claim 2
Dependent Claim
161 words
A PROESS FOR DEWATERING ACRYLONITRILE POLYMER CRUMB CONTAINING AT LEAST ABOUT 50% COMBINED ACRYLONITRILE PRODUCED BY POLYMERIZING ACRYLONITRILE, ALONE OR WITH OTHER MONOETHYLENICALLY UNSATURATED COMONOMERS COPOLYMERIZABLE THEREWITH, IN AN AQUEOUS MEDIUM COMPRISING: (A) HEATING AN AQUEOUS SLURRY OF SAID ACRYLONITRILE POLYMER CRUMB, SAID SLURRY CONTAINING SUFFICIENT WATER TO ENSURE THAT SAID SLURRY REMAINS EAISLY FLOWABLE, TO A TEMPERATURE ABOVE THE MINIMUM MELTING TEMPERATURE OF SAID POLYMER IN THE PRESENCE OF WATER BUT NOT MORE THAN ABOUT 20*C ABOVE SAID MINIMUM MELTING TEMPERATURE FOR A TIME SUFFICIENT FOR MELTING TO OCCUR WHILE UNDER A PRESSURE AT LEAST EQUAL TO THE VAPOR PRESURE OF WATER AT THE SLURRY TEMPERATURE AND WHILE AGITATING SAID SLURRY SUFFICIENTLY TO PROVENT SUBSTANTIAL COALESCENCE OF SAID MINIMUM (B) THEN COOLING SAID SLURRY TO BELOW SAID MINIMUM MELTING TEMPERATURE WHILE CONTINUING TO AGITATE SAID SLURRY SUFFICIENTLY TO PREVENT SUBSTANTIAL COALESCENCE OF SAID POLYMER PARTICLES, AND (C) THEREAFTER SEPARATING THE RESULTANT POLYMER PARTICLES FROM THE EXCESS LIQUID OF THE SLURRY.