Tubular reactor and method for multi-phase polymerisation

    公开(公告)号:US10384190B2

    公开(公告)日:2019-08-20

    申请号:US15548516

    申请日:2016-01-21

    发明人: Joachim Ritter

    摘要: The present invention relates to a tubular reactor (14) for multi-phase polymerization, in particular for producing butyl rubber, comprising a pipe piece (16) for radially delimiting a reactor volume between an inlet (18) and an outlet (20), a stirrer (22) for generating a flow (27) in the radial direction of the pipe piece (16), wherein the stirrer (22) is dimensioned and operable such that the flow (27) is impartable with a centrifugal force which generates a concentration distribution in the radial direction inside the pipe piece (16) and an outlet conduit (32) for discharging a concentrated radially inner part (30) of the flow (27, 28). Enrichment of polymer particles in the radially inner part (30) of the flow (27, 28) avoids gumming of the pipe piece (16) by the polymer particles so that the risk of a blockage is reduced.

    Quantitative preparation of allyl telechelic polyisobutylene under reflux conditions

    公开(公告)号:US10329361B2

    公开(公告)日:2019-06-25

    申请号:US15795638

    申请日:2017-10-27

    摘要: In one or more embodiments, the present invention provides a method for forming allyl telechelic polyisobutylene polymers having well defined molecular weights and molecular weight distributions using living cationic polymerization under ideal temperature control using a mixture of polar and nonpolar refluxing solvents. The methods according to various embodiments of the present invention provide temperature control that approaches the ideal, i.e., the heat of polymerization is instantaneously absorbed by the medium and the temperature of the system remains unchanged. The heat generated during the exothermic polymerization of isobutylene is released as an increase in the rate of reflux, rather than the temperature, since the temperature is set by the boiling point of the system and does not change.