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(11)    Patent No :    AP 1914   
(21)    Application No :    AP/P/2007/004012   
(22)    Filing Date :    28.10.2005   
(24)    Date of Grant &    07.11.2008   
(45)    Publication :

(30)  Priority Data       
(33) Country    (31) Number    (32) Date
EP    04256745.3    02.11.2004

(84)    Designated State

BW    GM    GH    KE    LS    MW  MZ   NA   SL
SD    SZ    T Z    UG    ZM    ZW

(73) Applicant(s)


Freeway, Dallas Texas 75234,
United States of America

(72) Inventors

ADAMS David Charles, United Kingdom

(74) Representative



(51)  International  Classification   B01J19/18 (2006.01)    B01J19/24 (2006.01)
B01J19/00 (2006.01)   

(54)    Title

Loop reactor for emulsion polymerisation

(57)    Abstract

A polymerisation reactor(l) comprising a circulation loop(2) , an inlet for raw material (3) , an outlet (5), driving means for (6) circulating a reactor charge within the circulation loop(2), and a pig station(7) for storing, launching, and receiving cleaning pigs. The pig station (7) comprises a lid to cover an opening enabling removal of the cleaning pig. The pig station (7) is constructed as a box with a cylindrical bore connected at both ends to the circulation loop, the bore having a central part with a diameter which is larger than the inner diameter of the circulation loop. At a transitional part at the outer ends of the bore the bore diameter narrows down to be substantially equal to the inner tube diameter of the circulation vloop. Over at least a part of the inner bore substantially half of the circular cross-section is formed in the removable lid.

(56)    Documents Cited :    US 6 391 121 A   WO 00 07717 A


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