IN2015DN02895A - - Google Patents

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Publication number
IN2015DN02895A
IN2015DN02895A IN2895DEN2015A IN2015DN02895A IN 2015DN02895 A IN2015DN02895 A IN 2015DN02895A IN 2895DEN2015 A IN2895DEN2015 A IN 2895DEN2015A IN 2015DN02895 A IN2015DN02895 A IN 2015DN02895A
Authority
IN
India
Prior art keywords
carboxylic acids
esters
oligomeric
oligomeric carboxylic
product
Prior art date
Application number
Inventor
Caspar Paetz
Udo Muehlbauer
Habib Driouch
Original Assignee
Uhde Inventa Fischer Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Uhde Inventa Fischer Gmbh filed Critical Uhde Inventa Fischer Gmbh
Publication of IN2015DN02895A publication Critical patent/IN2015DN02895A/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D319/00—Heterocyclic compounds containing six-membered rings having two oxygen atoms as the only ring hetero atoms
    • C07D319/10—1,4-Dioxanes; Hydrogenated 1,4-dioxanes
    • C07D319/12—1,4-Dioxanes; Hydrogenated 1,4-dioxanes not condensed with other rings

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Heterocyclic Compounds That Contain Two Or More Ring Oxygen Atoms (AREA)
  • Polyesters Or Polycarbonates (AREA)

Abstract

The present invention relates to a process for preparing cyclic carboxylic esters , especially intramolecular lactones for example dilactide, wherein these cyclic esters are prepared from oligomeric carboxylic acids by cyclizing depolymerization. The reaction gives as a by -product, a condensation product of these oligomeric carboxylic acids, i.e. a mixture of high molecular weight oligomeric carboxylic acids , which are hydrolysed in a further step and thus recovered. This hydrolysate can be added again to the cyclizing depolymerization conducted in the first stage.
IN2895DEN2015 2012-10-26 2013-10-23 IN2015DN02895A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP12190199.5A EP2725019B1 (en) 2012-10-26 2012-10-26 Method for the preparation of cyclic diesters, in particular dilactide
PCT/EP2013/072188 WO2014064160A1 (en) 2012-10-26 2013-10-23 Process for preparing cyclic diesters, especially dilactide

Publications (1)

Publication Number Publication Date
IN2015DN02895A true IN2015DN02895A (en) 2015-09-11

Family

ID=47088724

Family Applications (1)

Application Number Title Priority Date Filing Date
IN2895DEN2015 IN2015DN02895A (en) 2012-10-26 2013-10-23

Country Status (11)

Country Link
US (1) US9428484B2 (en)
EP (1) EP2725019B1 (en)
KR (1) KR101892580B1 (en)
CN (1) CN104781248B (en)
BR (1) BR112015009181B1 (en)
EA (1) EA027033B1 (en)
ES (1) ES2536294T3 (en)
IN (1) IN2015DN02895A (en)
MX (1) MX361328B (en)
WO (1) WO2014064160A1 (en)
ZA (1) ZA201501651B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2840390A1 (en) * 2013-08-19 2015-02-25 Mettler-Toledo AG Coulometric titration cell
US10080071B2 (en) * 2014-04-11 2018-09-18 Telefonaktiebolaget Lm Ericsson (Publ) Controlling time division duplex operation
EP3130911A1 (en) * 2015-08-10 2017-02-15 PURAC Biochem BV Quantification method of meso-lactide in a lactide-containing composition

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2526554A (en) 1947-07-28 1950-10-17 Goodrich Co B F Preparation of beta-hydroxy carboxylic acid esters by alcoholysis of linear polyesters derived from beta-lactones
US5229528A (en) 1991-11-22 1993-07-20 E. I. Du Pont De Nemours And Company Rapid depolymerization of polyhydroxy acids
BR9305788A (en) 1992-01-24 1997-02-18 Cargill Inc Continuous process for the manufacture of lactide polymers with improved purification methods
US5420304A (en) * 1992-03-19 1995-05-30 Biopak Technology, Ltd. Method to produce cyclic esters
EP0628533A1 (en) 1993-06-07 1994-12-14 E.I. Du Pont De Nemours And Company Recovery of hydroxy acids from trash
JPH07165753A (en) 1993-12-08 1995-06-27 Musashino Kagaku Kenkyusho:Kk Purification of lactide
JP3503127B2 (en) 1995-09-14 2004-03-02 トヨタ自動車株式会社 Method for recovering lactide from high molecular weight polylactic acid
US6229046B1 (en) 1997-10-14 2001-05-08 Cargill, Incorported Lactic acid processing methods arrangements and products
DE10020898B4 (en) 2000-04-20 2004-02-05 Inventa-Fischer Gmbh Process for the production of polylactic acid and device therefor
EP1694626B1 (en) 2003-12-10 2007-11-14 TATE & LYLE PUBLIC LIMITED COMPANY Purification process for lactide
CN100475808C (en) 2004-04-30 2009-04-08 国立大学法人九州工业大学 Method of recovering lactide from polylactic acid or derivative thereof
EP2072508A1 (en) 2007-12-19 2009-06-24 Galactic S.A. Method for obtaining lactide
JP2009249508A (en) 2008-04-07 2009-10-29 Kyushu Institute Of Technology Method for oligomerizing polylactic acid product efficiently
WO2010011894A1 (en) 2008-07-24 2010-01-28 The Board Of Regents Of The University Of Texas System Vh4 codon signature for multiple sclerosis
CN101434594B (en) 2008-12-19 2012-05-02 河北科技大学 Method for preparing lactide by mixed solvent process
BE1019608A3 (en) 2009-04-14 2012-09-04 Galactic Sa CHEMICAL RECYCLING OF PLA BY ALCOHOLISIS.
BE1018716A3 (en) 2009-04-14 2011-07-05 Galactic Sa CHEMICAL RECYCLING OF PLA BY HYDROLYSIS.
BE1018882A3 (en) 2009-09-10 2011-10-04 Galactic Sa PROCESS FOR STEREOSPECIFIC RECYCLING OF A MIXTURE OF POLYMERS BASED ON PLA.
WO2011104728A1 (en) * 2010-02-26 2011-09-01 Council Of Scientific & Industrial Research Improved process for the preparation of l-lactide of high chemical yield and optical purity
CN101906041B (en) * 2010-08-23 2013-07-10 孝感市易生新材料有限公司 Method for producing high-content and high optical purity amyl ester lactate by using two-step method

Also Published As

Publication number Publication date
CN104781248A (en) 2015-07-15
KR20150074159A (en) 2015-07-01
WO2014064160A1 (en) 2014-05-01
MX2015005066A (en) 2015-07-17
MX361328B (en) 2018-11-16
ES2536294T3 (en) 2015-05-22
ZA201501651B (en) 2015-12-23
EP2725019A1 (en) 2014-04-30
EP2725019B1 (en) 2015-04-08
EA201590366A1 (en) 2015-08-31
US9428484B2 (en) 2016-08-30
BR112015009181A2 (en) 2017-07-04
US20150266849A1 (en) 2015-09-24
EA027033B1 (en) 2017-06-30
KR101892580B1 (en) 2018-08-29
CN104781248B (en) 2017-09-12
BR112015009181B1 (en) 2020-10-27

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