| 摘要 |
<p>1,239,057. Mixing apparatus; polymerisation apparatus. FARBWERKE HOECHST A.G. 26 July, 1968 [26 July, 1967], No. 35743/68. Headings B1C and B1X. [Also in Division C3] Apparatus for the production of polyesters, especially polyethylene terephthalate, by continuous condensation comprises a horizontal cylindrical or frusto-conical vessel having an inlet 1 and outlets 6, 7 for vapour and product, and a rotatable stirrer comprising solid end discs 41, 42; intermediate baffle discs 4 having cutouts 5 arranged to provide a tortuous path through the vessel; peripheral stirrers 2 conforming to the interior surface of the vessel; and a plurality of protuberances from the discs, which may be continuous and form rods 3, grouped round the axis. The vessel is heated electrically or by a jacket in separate sections 10, 11, 12 of increasing temperature. The stirrers 2 are preferably of scoop-shaped cross-section (see Fig. 2a-f, not shown) and perforated; the protuberances or rods may be of various crosssections (see Fig. 3 a-e, not shown), and also perforated; and the cutouts of various shapes including complementary alternate rings and discs (see Figs. 4a-e not shown). In operation the stirrers dip into the melt and raise and distribute it over the rods, which are not immersed.</p> |
