Patent ID: 6189236
Filing Date: 2001-02-20
Classification: F26B,Y10S

Abstract:
A method for the continuous polymerization of monomer to produce polymer in a fluidized bed reactor which comprises: preconditioning the reactor by,a) continuously cycling a gaseous stream comprising said monomer through said fluidized bed reactor;b) continuously or intermittently passing said gaseous stream through an adsorbent bed to thereby reduce the amount of at least one of and, any water and polar compounds present therein to a level below 200 ppmv; thereafterc) dispersing a particulate seed bed into the polymerization zone of said reactor; and thereafterd) continuously or intermittently introducing a suitable catalyst into said polymerization zone while maintaining the temperature within the said polymerization zone below the sintering temperature of said catalyst;e) continuously or intermittently removing polymer from said reaction zone; andf) continuously adding monomer to said gaseous stream to replace monomer which becomes polymerized and is removed as polymer.