Title:
QUALITY TEST FOR POLYMERIZABLE LACTIC ACID AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2013/064219
Kind Code:
A3
Abstract:
The invention relates to a test for determining the quality of lactic acid, comprising a) means for the polycondensation of the lactic acid to form a pre-polymer b) means for depolymerization to form dilactide, and c) means for carrying out analytical methods for determining the dilactide yield and/or the racemization, wherein lactic acid which fulfills the test and is suitable for polymerization exhibits a dilactide yield of > 90 % and a racemization of < 5 %.
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Inventors:
SCHULZE JOACHIM (DE)
HAGEN RAINER (DE)
TIETZ WOLFGANG (DE)
GHANEGAONKAR SHASHANK (DE)
HAGEN RAINER (DE)
TIETZ WOLFGANG (DE)
GHANEGAONKAR SHASHANK (DE)
Application Number:
PCT/EP2012/004407
Publication Date:
July 18, 2013
Filing Date:
October 22, 2012
Export Citation:
Assignee:
THYSSENKRUPP UHDE GMBH (DE)
UHDE INVENTA FISCHER GMBH (DE)
SCHULZE JOACHIM (DE)
HAGEN RAINER (DE)
TIETZ WOLFGANG (DE)
GHANEGAONKAR SHASHANK (DE)
UHDE INVENTA FISCHER GMBH (DE)
SCHULZE JOACHIM (DE)
HAGEN RAINER (DE)
TIETZ WOLFGANG (DE)
GHANEGAONKAR SHASHANK (DE)
International Classes:
C08G63/78; C08L67/04; C12P7/56; G01N33/487
Domestic Patent References:
| WO1996006092A1 | 1996-02-29 |
Foreign References:
| US20020132967A1 | 2002-09-19 | |||
| US20060014975A1 | 2006-01-19 | |||
| US20110263811A1 | 2011-10-27 | |||
| US5043458A | 1991-08-27 | |||
| US5023349A | 1991-06-11 | |||
| US5136057A | 1992-08-04 | |||
| DE19902879A1 | 2000-08-03 | |||
| EP2030679A1 | 2009-03-04 |
Other References:
SAARA INKINEN ET AL: "From Lactic Acid to Poly(lactic acid) (PLA): Characterization and Analysis of PLA and Its Precursors", BIOMACROMOLECULES, vol. 12, no. 3, 14 March 2011 (2011-03-14), pages 523 - 532, XP055052721, ISSN: 1525-7797, DOI: 10.1021/bm101302t
Attorney, Agent or Firm:
THYSSENKRUPP UHDE GMBH (Friedrich-Uhde-Str. 15, Dortmund, DE)
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