| 摘要 |
In concentrating polymer solutions up to a desired specification level of residual solvents, encrustations can be prevented and the yield and the degree of purity can be increased, when the product is heated up under pressure, expanded through a restrictor element (3) with vapor formation into a first, preferably coiled flow pipe (7) and concentrated therein as far as possible, the mixture of vapors and polymer solution is whirled at an angle into a second flow pipe (9) in a sloping arrangement and fitted with self-cleaning elements (11, 12) and concentrated therein up to the desired level, and vapors and concentrate are separately discharged only downstream thereof.
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