Handbook of Industrial Drying

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41 Drying of Polymers

Article · November 2006
DOI: 10.1201/9781420017618.ch41

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A. S. Mujumdar McGill University
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Mainul Hasan 8597892065

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₄₁ Drying of Polymers

Arun S. Mujumdar and Mainul Hasan

CONTENTS

1. 
   Introduction 954
   
2. 
   Common Polymerization Processes 954
   
   1. 
      Bulk Polymerization 954
      
   2. 
      Solution Polymerization 955
      
   3. 
      Suspension Polymerization 955
      
   4. 
      Emulsion Polymerization 955
      
   5. 
      Gas-Phase Polymerization 956
      
3. 
   Dryer Classification 956
   
   1. 
      Classification by Mode of Heat Transfer 956
      
      1. 
         Indirect Dryers 956
         
      2. 
         Direct Dryers 956
         
   2. 
      Classification by Residence Time 956
      
      1. 
         Short Residence Time 956
         
      2. 
         Medium Residence Time 956
         
      3. 
         Long Residence Time 957
         
   3. 
      Other Considerations 957
      
   4. 
      Common Polymer Dryers 957
      
      1. 
         Rotary Dryers 957
         
      2. 
         Flash Dryers. 957
         
      3. 
         Spray Dryers 958
         
      4. 
         Fluidized Bed Dryers 958
         
      5. 
         Vibrated Fluidized Beds 958
         
      6. 
         Contact Fluid-Bed Dryers 959
         
      7. 
         Paddle Dryers. 959
         
      8. 
         Plate Dryer 959
         
      9. 
         DRT Spiral Dryers 960
         
      10. 
          Miscellaneous Dryers 961
          
4. 
   Typical Drying Systems for Selected Polymers 963
   
   1. 
      Drying of Polyolefins 963
      
      1. 
         Polypropylene 963
         
      2. 
         High-Density Polyethylene 965
         
   2. 
      Drying of Polyvinyl Chloride 965
      
      1. 
         Emulsion Polyvinyl Chloride 965
         
      2. 
         Suspension Polyvinyl Chloride 966
         
      3. 
         Vinyl Chloride–Vinyl Acetate Copolymer 968
         
   3. 
      Drying of Acrylonitrile–Butadiene–Styrene 968
      
   4. 
      Drying of Synthetic Fibers 970
      
      1. 
         Nylon 970
         
      2. 
         Polyester 971
         
   5. 
      Miscellaneous 971
      
5. 
   Drying of Polymer Resins 971
   
   1. 
      General Observations 972
      
      1. 
         Nonhygroscopic Resins 972
         
      2. 
         Hygroscopic Resins 972
         
   2. 
      Drying Methods 972
      
      1. 
         Drying with Heat as Transfer Medium. 972
         
      2. 
         Drying without a Heat Transfer Medium 973
         
6. 
   Drying of Selected Polymers 974
   
7. 
   Conclusion 976
   

Acknowledgments 978
References 978