POLYMERIZATION REACTOR AND PROCESS

摘要

A chemical reactor has an intensively mixed zone and a less intensively mixed zone together with a re-circulation loop to exchange reactants between the two zones. The reactor is suitable for reactions in which it is desirable to add a cold feed stream to the reactor without causing undue precipitation of the warmer reactor contents (and, accordingly, is especially suitable for the preparation of linear low density polyethylene by a solution process). The cold feed is intensively mixed with a portion of the hot reactor contents in the micromixed zone. The intensive mixing is sufficient to present precipitation. The resulting "warm" mixture is then circulated into the bulk of the hot reactor contents which are located in a reaction zone that is far less intensively mixed.