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Title:
METHOD FOR PRODUCING POLYMER
Document Type and Number:
WIPO Patent Application WO/2013/161890
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a method for producing a polymer that makes it possible to efficiently remove lithium and/or titanium residues from a polymer solution containing at least lithium and/or titanium, and to obtain a purified polymer solution having little metal residue. The method for producing a polymer comprises: a step (1) for preparing a polymer solution containing at least lithium and/or titanium; a step (2) for obtaining a mixed solution by adding and mixing water in an amount equal to 0.1-20 volume multiples in relation to the polymer solution, and an acid compound selected from compounds represented by formula (1); and a step (3) for removing an aqueous phase from the mixed solution to obtain a purified polymer solution. (In formula (1), R1, R2, and R3 each independently are a substituent group constituted of elements selected from C, H, O, and N, and the molecule comprises four or more oxygen atoms.)

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Inventors:
SHIMIZU DAISUKE (JP)
SHIBUYA KENTA (JP)
Application Number:
PCT/JP2013/062099
Publication Date:
October 31, 2013
Filing Date:
April 24, 2013
Export Citation:
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Assignee:
ASAHI KASEI CHEMICALS CORP (JP)
International Classes:
C08C2/04; C08F6/08; C08F8/04
Domestic Patent References:
WO2000008069A12000-02-17
Foreign References:
JP2002356509A2002-12-13
JP2009091574A2009-04-30
JPH1171426A1999-03-16
JPH09100314A1997-04-15
JPH06136034A1994-05-17
US4595749A1986-06-17
US5104972A1992-04-14
JP2002167406A2002-06-11
JP2009091574A2009-04-30
US4501857A1985-02-26
US4673714A1987-06-16
US4980421A1990-12-25
US5753778A1998-05-19
US5910566A1999-06-08
US6020439A2000-02-01
Other References:
See also references of EP 2842973A4
Attorney, Agent or Firm:
INABA, Yoshiyuki et al. (JP)
Yoshiyuki Inaba (JP)
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