| 摘要 |
<p>Method and apparatus for the chlorination of polyolefins in aqueous suspension. The method includes subjecting the suspension of the polyolefin to a submerged jet of chlorine gas at a velocity sufficient to atomize the chlorine; i.e., at least 18.3 m/s (about sixty feet per second). By this method a very intimate mixture of chlorine and aqueous suspension is formed, whereby the chlorination proceeds more efficiently and at a lower chlorine pressure. Further advantages include a more uniformly-substituted product. Figure 1 represents means for introducing the jet of gas. A port (3) extends through and outwardly from the interior of the vessel wall (2). Disposed within the port (3) is an internal plug (4) with an internal passageway (5). The plug (4) forms a gas-tight seal with port (3) and with a gas-delivery line (6). One end (5a) of the passageway (5) widens and forms a continuation of the enlarged end (6a) of the gas-delivery line (6). The other end of the passageway (5) opens into the interior of the reactor (1). The exit end (4b) of the plug (4) extends obliquely a short distance into the interior of the reactor (1). The entrance end (4a) of the plug (4) tapers outwardly to conform to the enlarged end (6a) of the gas-delivery line (6), thereby forming a gas-tight seal when the flanges (7), (8) and (9) of the plug (4), port (3) and line (6) are fastened together as shown.</p> |
