(19)
(11)EP 1 178 055 A3

(12)EUROPEAN PATENT APPLICATION

(88)Date of publication A3:
29.01.2003 Bulletin 2003/05

(43)Date of publication A2:
06.02.2002 Bulletin 2002/06

(21)Application number: 01115090.1

(22)Date of filing:  21.06.2001
(51)International Patent Classification (IPC)7C08F 6/12, C08C 2/06
(84)Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30)Priority: 22.06.2000 JP 2000188136

(71)Applicant: JSR Corporation
Tokyo (JP)

(72)Inventors:
  • Takami, Nobuyasu
    Tokyo (JP)
  • Uchimura, Kazumi
    Tokyo (JP)
  • Yoshioka, Kunio
    Tokyo (JP)
  • Nakazawa, Kazuyoshi
    Tokyo (JP)

(74)Representative: Leson, Thomas Johannes Alois, Dipl.-Ing. 
Tiedtke-Bühling-Kinne & Partner GbR, TBK-Patent, Bavariaring 4
80336 München
80336 München (DE)

  


(54)Method for recovering a polymer from solution


(57) A method for recovering a polymer efficiently from a polymer solution obtained by a solution polymerization is provided. By means of a method for recovering a polymer comprising heating a polymer solution obtained by a solution polymerization indirectly in a pipe to evaporate a solvent while forming a gas-liquid mixed phase flow or a gas-liquid-solid mixed phase flow followed by supplying the mixture to a recovery tank under pressure or under reduced pressure to separate the polymer from the solvent, the polymer can efficiently be separated from the solvent without changing the physical characteristics or the chemical characteristics of the polymer. When recovering a polymer from a polymer solution having a high viscosity, an infusion of water or steam serves to reduce the viscosity of the polymer solution and also to increase the linear velocity of a gas, whereby preventing the occlusion of a pipe and facilitating the operation.







Search report