PROCESS AND APPARATUS FOR PRODUCTION OF ALKYLENE POLYMER Russian patent published in 2007 - IPC C08F6/10 C08F6/28 B01D3/14 

FIELD: polymer production.

SUBSTANCE: invention relates to a process for continuously producing alkylene polymer. e.g. styrene, and comprises bulk polymerization of aromatic alkylene resulting in formation of molten polymer mass, which is then processed to remove volatile products in at least two consecutive steps carried out such as to separate polymer from unreacted monomers and oligomers at least partially formed during polymerization. More specifically, process comprises passing first gaseous stream, isolated from polymer in the first volatiles removal step, to the first zone Z1 for direct concentration and fractionation, withdrawing from the upper part Z1 gaseous stream G1 including essentially monomer, and withdrawing liquid stream L1 from the bottom Z1, reach in oligomers. A portion of this liquid stream L1 is separated, cooled, and then returned to Z1 in a manner that, because of coming into direct contact with first gaseous stream, a partial condensation proceeds in Z1. Process further comprises passing second gaseous stream, isolated from polymer in the second volatiles removal step, to the second zone Z2 for direct concentration and fractionation. Another portion of liquid stream L1 isolated from Z1 is also passed to the same zone in a manner that, because of coming into direct contact with second gaseous stream, a partial condensation proceeds in Z2. From the upper part of Z2 is withdrawn gaseous stream G2 including monomer while, from the bottom Z2, liquid stream L3 including essentially oligomers is taken off.

EFFECT: enabled continuity of production.

2 cl, 2 dwg