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ACRYLONITRILE POLYMER MANUFACTURE
POLYACRYLONITRILE SPINNING SOLUTION MANUFACTURE
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1,2-dichloroethane acetaldehyde acetic acid acetonitrile acetylene acrylic acid acrylic fibers acrylonitrile alcohol ammonia ammonium amount apparatus aqueous solution assigned autoclave bottom by-products carbon catalyst catalyst solution compound comprising concentration condenser conduit containing cooling crude cupric desired dichloroethane dimethylformamide dioxide distillation column effluent ester ethane ethyl acetate example extractive distillation extruded feed fibers Figure filaments fluidized fraction gaseous gases heat exchanger hydrocarbon hydrocyanic acid hydrogen chloride introduced liquid phase maintained MANUFACTURE metal methacrylate mixer mixing monomer nitrile nitrogen obtained operation overhead oxidation oxychlorination oxygen particles piocettet pipe poget polymer polymerization polyvinyl portion preferably pressure Process A process process developed propylene pump purification quench ratio reaction mixture reaction zone reactor recovered recycled removed salt separated slurry sodium solvent spinning stream substantially suitable sulfur sump temperature tower tube U.S. Patent unreacted valve vapor vessel vinyl acetate vinyl chloride vinyl fluoride washing weight percent withdrawn