CASE NO: 516
| MATERIAL: |
Liquid polymers, solvents and initiators. |
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PROBLEM: |
Continuously mix non-solvent feed with high viscosity copolymer dope mixture. Copolymer particles precipitate out in non-solvent feed. Control precipitate particle size to 1-2 mm with minimum fines. |
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RESULTS: |
Controlled particle size to 1-2 mm. Mixed continuously and uniformly. |
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AB MIXER: |
Model 6 x 3, toothed impeller/liner, 30 HP, 3600 RPM, full open grid.
Model 3 x 1.5, toothed impeller/liner, 7.5 HP, 4200 to 1200 RPM, 1/4" grid. |
| BENEFITS: |
Controlled particle size. Eliminated loss of fines during subsequent non-solvent washing step. Increased yield 15-20%. |
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