AU2374092A - Thin film depolymerization to dimeric cyclic esters - Google Patents

Thin film depolymerization to dimeric cyclic esters

Info

Publication number
AU2374092A
AU2374092A AU23740/92A AU2374092A AU2374092A AU 2374092 A AU2374092 A AU 2374092A AU 23740/92 A AU23740/92 A AU 23740/92A AU 2374092 A AU2374092 A AU 2374092A AU 2374092 A AU2374092 A AU 2374092A
Authority
AU
Australia
Prior art keywords
thin film
cyclic esters
dimeric cyclic
depolymerization
film depolymerization
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
AU23740/92A
Inventor
Kamlesh Kumar Bhatia
Kang Lin
Robert Stephen Nash
Thomas Walter Stambaugh
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of AU2374092A publication Critical patent/AU2374092A/en
Abandoned legal-status Critical Current

Links

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/22—Evaporating by bringing a thin layer of the liquid into contact with a heated surface
    • B01D1/222—In rotating vessels; vessels with movable parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/18—Stationary reactors having moving elements inside
    • B01J19/1887—Stationary reactors having moving elements inside forming a thin film
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J6/00—Heat treatments such as Calcining; Fusing ; Pyrolysis
AU23740/92A 1991-07-24 1992-07-23 Thin film depolymerization to dimeric cyclic esters Abandoned AU2374092A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US734977 1985-05-16
US73497791A 1991-07-24 1991-07-24

Publications (1)

Publication Number Publication Date
AU2374092A true AU2374092A (en) 1993-02-23

Family

ID=24953831

Family Applications (1)

Application Number Title Priority Date Filing Date
AU23740/92A Abandoned AU2374092A (en) 1991-07-24 1992-07-23 Thin film depolymerization to dimeric cyclic esters

Country Status (6)

Country Link
EP (1) EP0641336A1 (en)
JP (1) JP3255413B2 (en)
AU (1) AU2374092A (en)
CA (1) CA2113799A1 (en)
TW (1) TW211577B (en)
WO (1) WO1993002075A1 (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6326458B1 (en) * 1992-01-24 2001-12-04 Cargill, Inc. Continuous process for the manufacture of lactide and lactide polymers
US6005067A (en) 1992-01-24 1999-12-21 Cargill Incorporated Continuous process for manufacture of lactide polymers with controlled optical purity
US5686630A (en) * 1993-09-29 1997-11-11 Chronopol, Inc. Purifying cyclic esters by aqueous solvent extraction
US6005068A (en) * 1992-10-02 1999-12-21 Cargill Incorporated Melt-stable amorphous lactide polymer film and process for manufacture thereof
DE69322155T2 (en) * 1992-10-02 1999-08-19 Cargill Inc PAPER WITH A COATING FROM MELT-STABLE POLYMER AND ITS METHOD FOR THE PRODUCTION THEREOF
US5338822A (en) * 1992-10-02 1994-08-16 Cargill, Incorporated Melt-stable lactide polymer composition and process for manufacture thereof
US5359026A (en) * 1993-07-30 1994-10-25 Cargill, Incorporated Poly(lactide) copolymer and process for manufacture thereof
BE1008099A3 (en) * 1994-03-04 1996-01-16 Brussels Biotech Sa Semi-continuous polylactide production by opening lactide cycles obtainedfrom lactic acid derivatives
US5830991A (en) * 1996-02-09 1998-11-03 Kureha Kagaku Kagyo Kk Preparation process and purification process of dimeric cyclic ester of hydroxycarboxylic acid
US6313319B1 (en) 1998-09-25 2001-11-06 Shimadzu Corporation Method for purifying lactide and lactide for food additives
US7005496B2 (en) * 2003-07-24 2006-02-28 Shell Oil Company Production of trimethylene carbonate from poly (trimethylene carbonate) by wiped film reactive evaporation
AT412951B (en) * 2003-10-02 2005-09-26 Vtu Engineering Planungs Und B THIN FILM EVAPORATOR
JP4696824B2 (en) * 2005-10-07 2011-06-08 株式会社日立プラントテクノロジー Polyester production method and polyester production apparatus
JP5098233B2 (en) 2006-06-30 2012-12-12 株式会社日立プラントテクノロジー Polyhydroxycarboxylic acid synthesis method and apparatus
AU2007327594B2 (en) * 2006-11-28 2013-08-22 Purac Biochem Bv Stable lactide particles
JP4650427B2 (en) * 2007-01-04 2011-03-16 株式会社日立プラントテクノロジー Centrifugal thin film evaporator and operating method thereof
JP5229268B2 (en) * 2010-05-10 2013-07-03 株式会社日立プラントテクノロジー Polylactic acid synthesis apparatus and method
EP2559725B1 (en) * 2011-08-19 2024-05-08 Uhde Inventa-Fischer GmbH Method and device for recovery of lactide from polylactide and glycolide from polyglycolide
CN105536653A (en) * 2015-12-22 2016-05-04 江苏瑞安特重型机械有限公司 A fusing and mixing device for treating high viscosity materials
CN111013520B (en) * 2019-12-23 2022-04-05 重庆市天友乳业股份有限公司 Preparation process of solid lactic acid

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5023349A (en) * 1990-05-08 1991-06-11 E. I. Du Pont De Nemours And Company Continuous process for rapid conversion of oligomers to cyclic esters

Also Published As

Publication number Publication date
JP3255413B2 (en) 2002-02-12
CA2113799A1 (en) 1993-02-04
JPH07500091A (en) 1995-01-05
EP0641336A1 (en) 1995-03-08
WO1993002075A1 (en) 1993-02-04
TW211577B (en) 1993-08-21

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