| 摘要 |
1,230,510. Polymerisation apparatus; continuous discharge mixing apparatus. RHONEPOULENC S.A. 29 July, 1969 [30 July, 1968], No. 38117/69. Headings B1C and B1X. [Also in Division C3] A reactor 3 for the continuous polymerisation of acrylonitrile comprises a column 13 (see Fig. 2) having heating jackets 14 and a reaction mixing system comprising an axially rotatable shaft 15 carrying discs 17 and turbines 16. The discs 17 define "reaction zones" each of which has at least one turbine 16. Two spiral strips 18 of opposite pitch scrape the column wall. The reactor may be split into two or more parts mounted in series, Fig. 3 (not shown). In operation monomer, catalyst and solvent are fed from reservoirs 1, 2 (see Fig. 1) to the reactor 3 and polymer is then passed to 4 where it is stirred and diluted with diluent from reservoir 5. Gear pump 6 pumps the diluted polymer to a horizontal film evaporator 7 where solvent and residual volatile monomers are removed. The solution is then withdrawn by gear pump 8 and its viscosity optionally adjusted by addition of a diluent from reservoir 10 before spinning into yarn. |
