US 11,834,530 B2
Reaction configuration and procedure for polymers production
Gianni Marchetti, Mantova (IT); and Giovanni Regattieri, Ravenna (IT)
Appl. No. 17/252,013
Filed by VERSALIS S.P.A., San Donato Milanese (IT)
PCT Filed Jun. 11, 2019, PCT No. PCT/IB2019/054853
§ 371(c)(1), (2) Date Dec. 14, 2020,
PCT Pub. No. WO2019/239309, PCT Pub. Date Dec. 19, 2019.
Claims priority of application No. 102018000006303 (IT), filed on Jun. 14, 2018.
Prior Publication US 2022/0267482 A1, Aug. 25, 2022
Int. Cl. C08F 2/01 (2006.01); C08F 2/06 (2006.01)
CPC C08F 2/01 (2013.01) [C08F 2/06 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A procedure of polymerisation in solution for the production of polymers, comprising the following steps:
continuously feeding one or more monomers, one or more solvents in a quantity comprised between 70% and 90% by weight, and a catalytic system, to a first stirred reaction volume, wherein a single mixing cell is formed, in which the polymerisation begins until a conversion is attained that varies from 20% to 70% with respect to the final conversion achieved,
proceeding the polymerisation in at least one second stirred reaction volume connected in series to the first reaction volume, in which two or more mixing cells are formed, at the outlet of which the final conversion of the monomer is attained;
wherein in the first reaction volume the average residence time of the reagent mixture varies within an interval ranging from 10% to 25% with respect to the average residence time of the entire reaction volume.