DE69320467D1 - Verfahren zur herstellung von cyclischen estern aus hydroxysäuren und deren derivaten - Google Patents
Verfahren zur herstellung von cyclischen estern aus hydroxysäuren und deren derivatenInfo
- Publication number
- DE69320467D1 DE69320467D1 DE69320467T DE69320467T DE69320467D1 DE 69320467 D1 DE69320467 D1 DE 69320467D1 DE 69320467 T DE69320467 T DE 69320467T DE 69320467 T DE69320467 T DE 69320467T DE 69320467 D1 DE69320467 D1 DE 69320467D1
- Authority
- DE
- Germany
- Prior art keywords
- cyclic esters
- derivatives
- disclosed
- acids
- hydroxysic
- 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.)
- Expired - Fee Related
Links
- 238000004519 manufacturing process Methods 0.000 title abstract 3
- 239000002253 acid Substances 0.000 title 1
- 150000007513 acids Chemical class 0.000 title 1
- 150000002148 esters Chemical class 0.000 title 1
- 125000004122 cyclic group Chemical group 0.000 abstract 4
- 238000006243 chemical reaction Methods 0.000 abstract 2
- 238000000034 method Methods 0.000 abstract 2
- RKDVKSZUMVYZHH-UHFFFAOYSA-N 1,4-dioxane-2,5-dione Chemical compound O=C1COC(=O)CO1 RKDVKSZUMVYZHH-UHFFFAOYSA-N 0.000 abstract 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical class OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 abstract 1
- -1 cyclic ester Chemical class 0.000 abstract 1
- JJTUDXZGHPGLLC-UHFFFAOYSA-N lactide Chemical compound CC1OC(=O)C(C)OC1=O JJTUDXZGHPGLLC-UHFFFAOYSA-N 0.000 abstract 1
- 239000007791 liquid phase Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 239000005022 packaging material Substances 0.000 abstract 1
- 229920000642 polymer Polymers 0.000 abstract 1
- 239000012808 vapor phase Substances 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/42—Separation; Purification; Stabilisation; Use of additives
- C07C51/48—Separation; Purification; Stabilisation; Use of additives by liquid-liquid treatment
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
- C09D167/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
-
- 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
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/19—Details relating to the geometry of the reactor
- B01J2219/194—Details relating to the geometry of the reactor round
- B01J2219/1941—Details relating to the geometry of the reactor round circular or disk-shaped
- B01J2219/1942—Details relating to the geometry of the reactor round circular or disk-shaped spherical
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Heterocyclic Compounds That Contain Two Or More Ring Oxygen Atoms (AREA)
- Polyesters Or Polycarbonates (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/854,559 US5319107A (en) | 1990-09-18 | 1992-03-19 | Method to produce cyclic esters |
PCT/US1993/002483 WO1993019058A2 (en) | 1992-03-19 | 1993-03-17 | Process for the production of cyclic esters from hydroxy acids and derivatives thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69320467D1 true DE69320467D1 (de) | 1998-09-24 |
DE69320467T2 DE69320467T2 (de) | 1999-04-22 |
Family
ID=25319033
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69320467T Expired - Fee Related DE69320467T2 (de) | 1992-03-19 | 1993-03-17 | Verfahren zur herstellung von cyclischen estern aus hydroxysäuren und deren derivaten |
Country Status (16)
Country | Link |
---|---|
US (1) | US5319107A (de) |
EP (1) | EP0632807B1 (de) |
JP (1) | JP2922303B2 (de) |
KR (1) | KR950700898A (de) |
CN (1) | CN1080921A (de) |
AT (1) | ATE169913T1 (de) |
AU (1) | AU677183B2 (de) |
BR (1) | BR9306101A (de) |
DE (1) | DE69320467T2 (de) |
FI (1) | FI115459B (de) |
IL (1) | IL104765A0 (de) |
MY (1) | MY116462A (de) |
NO (1) | NO943464L (de) |
NZ (1) | NZ251210A (de) |
TW (1) | TW321645B (de) |
WO (1) | WO1993019058A2 (de) |
Families Citing this family (53)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5767222A (en) * | 1988-08-08 | 1998-06-16 | Chronopol, Inc. | Degradable polydioxaneone-based materials |
JP2852545B2 (ja) * | 1989-11-14 | 1999-02-03 | チッソ株式会社 | 複数の不斉点を持つ光学活性化合物および製造法 |
US5420304A (en) * | 1992-03-19 | 1995-05-30 | Biopak Technology, Ltd. | Method to produce cyclic esters |
US5686630A (en) * | 1993-09-29 | 1997-11-11 | Chronopol, Inc. | Purifying cyclic esters by aqueous solvent extraction |
US5463086A (en) * | 1993-03-24 | 1995-10-31 | Dainippon Ink And Chemicals, Inc. | Process for producing lactides and process for purifying crude lactides |
BE1008099A3 (fr) * | 1994-03-04 | 1996-01-16 | Brussels Biotech Sa | Production semi-continue de polylactides par ouverture de cycle lactides obtenus a partir de derives d'acide lactique. |
JPH10109983A (ja) * | 1996-10-04 | 1998-04-28 | Mitsubishi Gas Chem Co Inc | 環状エステルの製造方法および精製方法 |
DE19723807C2 (de) * | 1997-06-06 | 2003-04-24 | Ferring Gmbh | Verfahren zur Herstellung von Copolyestern |
BE1011759A3 (fr) * | 1998-02-24 | 1999-12-07 | Brussels Biotech S A | Procede de production d'esters cycliques. |
US6313319B1 (en) | 1998-09-25 | 2001-11-06 | Shimadzu Corporation | Method for purifying lactide and lactide for food additives |
DE19902879A1 (de) * | 1999-01-25 | 2000-08-03 | Wolff Walsrode Ag | Verfahren zur Herstellung von hochreinem Dilactid |
US6469133B2 (en) | 1999-12-13 | 2002-10-22 | Board Of Trustees Of Michigan State University | Process for the preparation of polymers of dimeric cyclic esters |
DE10027393B4 (de) * | 2000-06-02 | 2007-05-16 | Wella Ag | Poly- und Oligoester kationischer Hydroxysäuren, Verfahren zu ihrer Herstellung und ihre Verwendung |
BR0114355A (pt) * | 2001-01-31 | 2003-12-09 | Toyota Motor Co Ltd | Processo para a produção de lactida, processo para a produção de ácido polilático, processo para a produção de etila, processo para a produção de éster de lactato e processo para a produção de pré-polìmero de ácido lático |
US6982026B2 (en) * | 2001-03-15 | 2006-01-03 | Tate & Lyle Ingredients Americas, Inc. | Azeotropic distillation process for producing organic acids or organic acid amides |
US6926810B2 (en) * | 2001-03-15 | 2005-08-09 | A. E. Staley Manufacturing Co. | Process for obtaining an organic acid from an organic acid ammonium salt, an organic acid amide, or an alkylamine organic acid complex |
US6984293B2 (en) * | 2001-03-15 | 2006-01-10 | Tate & Lyle Ingredients | Azeotropic distillation of cyclic esters of hydroxy organic acids |
US6979720B2 (en) | 2002-05-03 | 2005-12-27 | E. I. Du Pont De Nemours And Company | manufacture of certain cyclic ester oligomers |
CA2522409A1 (en) * | 2003-04-30 | 2004-11-18 | E.I. Du Pont De Nemours And Company | Continuous bioreactor process for the preparation of polyester cyclic oligomers |
WO2006124899A2 (en) * | 2005-05-13 | 2006-11-23 | Cargill, Incorporated | Production of derivatives of lactide, production of lactides, and use of lactide in foods and to produce polymers |
EP2017347B1 (de) * | 2006-03-29 | 2014-05-07 | Bio-Energy Corporation | Verfahren zur trennung von milchsäurekomponenten von milchsäurefermentationsbrühe und trennvorrichtung |
EP2102183B1 (de) * | 2006-12-13 | 2012-06-27 | Samuel J. Wajc | Herstellung von cyclischen diestern von alphahydroxysäuren |
CN101925591B (zh) * | 2007-12-26 | 2013-12-04 | 克坦顿有限公司 | 用于生产α-羟酸的环二酯的方法 |
CA2712490A1 (en) * | 2008-01-18 | 2009-07-23 | Greenlight Biofuels Holdings, Llc | Process and system for preparation of bio-fuels |
JP5459974B2 (ja) * | 2008-04-11 | 2014-04-02 | 株式会社日立製作所 | 精製乳酸環状二量体の製造方法及び製造装置、並びに、ポリ乳酸の製造方法及び製造装置 |
BE1018247A3 (fr) * | 2008-08-14 | 2010-07-06 | Futerro Sa | Procede d'obtention de lactide. |
EP2321294B1 (de) * | 2008-08-29 | 2015-09-30 | Uhde Inventa-Fischer GmbH | Verfahren zur herstellung eines gemisches von lactid-derivaten |
KR101154029B1 (ko) | 2009-05-20 | 2012-06-07 | 한국화학연구원 | 젖산에스테르로부터 락타이드의 직접 전환용 촉매 및 이를 이용한 락타이드의 제조방법 |
WO2012000921A1 (en) | 2010-06-29 | 2012-01-05 | Solvay Sa | Process for the manufacture of lactide |
EP2407463A1 (de) | 2010-07-14 | 2012-01-18 | Solvay SA | Verfahren zur Herstellung eines cyclischen Diesters einer alpha-Hydroxysäure |
BR112013004935A2 (pt) * | 2010-09-07 | 2016-08-02 | Myriant Corp | "desitratação catalítica de ácido láctico e ésteres de ácido láctico". |
KR101616171B1 (ko) | 2010-10-28 | 2016-04-28 | 토탈 마케팅 서비스 | 유기산 제조에서의 모나스쿠스의 용도 |
US20120245322A1 (en) * | 2011-03-25 | 2012-09-27 | Hyundai Motor Company | Manufacturing lactide from lactic acid |
KR101326521B1 (ko) * | 2011-05-26 | 2013-11-07 | 현대자동차주식회사 | 유산으로부터 락타이드의 제조 방법 |
CN102351838B (zh) * | 2011-07-21 | 2013-07-24 | 凯莱英医药集团(天津)股份有限公司 | 一种1,4-二氧六环-2,5-二醇的合成方法 |
KR101459819B1 (ko) * | 2012-04-04 | 2014-11-07 | 현대자동차주식회사 | 유산염으로부터 락타이드의 제조방법 |
WO2013160485A1 (de) | 2012-04-28 | 2013-10-31 | Uhde Inventa-Fischer Gmbh | Verfahren zur kontinuierlichen herstellung von lactid direkt aus konzentrierter milchsäure |
EP3056490A1 (de) * | 2015-02-13 | 2016-08-17 | PURAC Biochem BV | Verfahren zur Herstellung von Lactid |
CN105801555A (zh) * | 2016-03-31 | 2016-07-27 | 东华大学 | 一种聚合级丙交酯的制备方法 |
JP2019519609A (ja) * | 2016-06-20 | 2019-07-11 | トタル リサーチ アンド テクノロジー フエリユイ | オリゴマーおよび触媒の加水分解を回収し水で行う単一工程によるラクチドの製造方法 |
JP2019519608A (ja) * | 2016-06-20 | 2019-07-11 | トタル リサーチ アンド テクノロジー フエリユイ | 溶剤を別に供給する単一工程によるラクチドの製造方法 |
JP2019521186A (ja) * | 2016-06-20 | 2019-07-25 | トタル リサーチ アンド テクノロジー フエリユイ | 熱回収を行なうラクチドの一段階製造方法 |
CN109563068A (zh) * | 2016-06-20 | 2019-04-02 | 道达尔研究技术弗吕公司 | 通过滗析回收水的单步骤丙交酯生产工艺 |
GB201621549D0 (en) | 2016-12-19 | 2017-02-01 | Univ Leuven Kath | Catalytic process |
EP3891135A1 (de) * | 2018-12-06 | 2021-10-13 | Haldor Topsøe A/S | Verfahren zur herstellung von glykolid |
CN113387921B (zh) * | 2021-06-18 | 2022-08-19 | 华东理工大学 | 一种合成乙交酯的方法 |
EP4134365A1 (de) * | 2021-08-12 | 2023-02-15 | Sulzer Management AG | Anlage und effizientes verfahren zur herstellung von lactid aus milchsäure |
CN113861159A (zh) * | 2021-10-28 | 2021-12-31 | 北京工商大学 | 一种直接缩聚制备丙交酯的方法 |
CN113842657B (zh) * | 2021-10-28 | 2023-10-03 | 北京工商大学 | 一种循环制备丙交酯的设备 |
CN114163414A (zh) * | 2021-11-26 | 2022-03-11 | 上海中化科技有限公司 | 乙交酯的制备方法和制备装置 |
CN114195755B (zh) * | 2021-11-26 | 2023-09-19 | 上海浦景化工技术股份有限公司 | 一种乙交酯的制备方法 |
CN114621179B (zh) * | 2022-03-17 | 2024-03-26 | 中国神华煤制油化工有限公司 | 乙交酯的合成方法 |
CN114805285A (zh) * | 2022-06-07 | 2022-07-29 | 南昌大学 | 一种从l-乳酸制备丙交酯的方法 |
Family Cites Families (44)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA863673A (en) * | 1971-02-16 | K. Schneider Allan | Absorbable suture | |
DE221786C (de) * | ||||
DE53074C (de) * | Frau A. LA GUAYRA MAYO in Great Falls, Cty Cascade, und W. HUDNALL in Helena, Cty Lewisand Clark, V. St. A | Verstellbare Säumvorrichtung für Nähmaschinen | ||
DE267826C (de) * | 1912-12-28 | 1913-12-02 | Chemische Werke | Verfahren zur Darstellung von lactid |
US1095205A (en) * | 1913-05-15 | 1914-05-05 | Chemische Werke Vorm Dr Heinrich Byk | Manufacture of lactid. |
US1594843A (en) * | 1921-08-19 | 1926-08-03 | Du Pont | Purification of lactic acid |
US1995970A (en) * | 1931-04-04 | 1935-03-26 | Du Pont | Polymeric lactide resin |
US2163268A (en) * | 1933-12-12 | 1939-06-20 | Du Pont | Method for making cyclic esters |
US2174491A (en) * | 1938-06-28 | 1939-09-26 | Paul D Watson | Method of making lactic acid resinous products |
US2189572A (en) * | 1938-09-01 | 1940-02-06 | Paul D Watson | Process for fractionating resinous products |
US2703316A (en) * | 1951-06-05 | 1955-03-01 | Du Pont | Polymers of high melting lactide |
US2668162A (en) * | 1952-03-20 | 1954-02-02 | Du Pont | Preparation of high molecular weight polyhydroxyacetic ester |
US2758987A (en) * | 1952-06-05 | 1956-08-14 | Du Pont | Optically active homopolymers containing but one antipodal species of an alpha-monohydroxy monocarboxylic acid |
US2768973A (en) * | 1954-11-30 | 1956-10-30 | Du Pont | Preparation of glycolaldehyde by hydrolysis of 4-chloro-2-oxodioxolane |
US3322791A (en) * | 1963-09-26 | 1967-05-30 | Ethicon Inc | Preparation of optically active lactides |
DE1194142B (de) * | 1963-11-19 | 1965-06-03 | Bayer Ag | Verfahren zum UV-Stabilisieren von Polycarbonaten |
NL6516979A (de) * | 1964-12-28 | 1966-06-29 | ||
DD53074A1 (de) | 1965-12-18 | 1967-01-05 | Verfahren zur Herstellung cyclischer Esteranhydride von alpha-Hydroxycarbonsäuren | |
US3457280A (en) * | 1967-06-12 | 1969-07-22 | American Cyanamid Co | Alpha-glycolide and methods for the isolation thereof |
US3435008A (en) * | 1967-08-22 | 1969-03-25 | American Cyanamid Co | Method for preparation of isomerically pure beta-glycolide and polymerization method for glycolide compositions employing partial hydrolyzate of said beta-glycolide |
US3597450A (en) * | 1969-11-05 | 1971-08-03 | American Cyanamid Co | Preparation of glycolide polymerizable into polyglycolic acid of consistently high molecular weight |
US3867190A (en) * | 1971-10-18 | 1975-02-18 | American Cyanamid Co | Reducing capillarity of polyglycolic acid sutures |
US3736646A (en) * | 1971-10-18 | 1973-06-05 | American Cyanamid Co | Method of attaching surgical needles to multifilament polyglycolic acid absorbable sutures |
US4033938A (en) * | 1974-01-21 | 1977-07-05 | American Cyanamid Company | Polymers of unsymmetrically substituted 1,4-dioxane-2,5-diones |
US3960152A (en) * | 1974-01-21 | 1976-06-01 | American Cyanamid Company | Surgical sutures of unsymmetrically substituted 1,4-dioxane-2,5-diones |
DE3708915C2 (de) * | 1987-03-19 | 1996-04-04 | Boehringer Ingelheim Kg | Verfahren zur Herstellung von Lactid |
DE3632103A1 (de) * | 1986-09-20 | 1988-03-24 | Boehringer Ingelheim Kg | Verfahren zur herstellung von lactid |
EP0261572A1 (de) * | 1986-09-20 | 1988-03-30 | Boehringer Ingelheim Kg | Verfahren zur Herstellung von Lactid |
ES2030409T3 (es) * | 1986-10-24 | 1992-11-01 | Boehringer Ingelheim Kg | Procedimiento para preparar y purificar compuestos termolabiles . |
EP0275581B1 (de) * | 1986-12-19 | 1992-08-12 | Akzo N.V. | Herstellung von Polymilchsäure und Copolymeren daraus |
US4835293A (en) * | 1987-02-24 | 1989-05-30 | E. I. Du Pont De Nemours And Company | Atmospheric pressure process for preparing pure cyclic esters |
NL8702563A (nl) * | 1987-10-28 | 1989-05-16 | Cca Biochem B V | Polymeer lactide, werkwijze voor het bereiden van een dergelijk polymeer lactide, alsmede een samenstelling, die een dergelijk polymeer lactide bevat. |
US5274127A (en) * | 1990-09-18 | 1993-12-28 | Biopak Technology, Ltd. | Lactide production from dehydration of aqueous lactic acid feed |
US5068418A (en) * | 1989-05-08 | 1991-11-26 | Uop | Separation of lactic acid from fermentation broth with an anionic polymeric absorbent |
US5075115A (en) * | 1990-04-02 | 1991-12-24 | Fmc Corporation | Process for polymerizing poly(lactic acid) |
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 |
US5091544A (en) * | 1990-05-08 | 1992-02-25 | E. I. Du Pont De Nemours And Company | Process for rapid conversion of oligomers to cyclic esters |
EP0531458B1 (de) * | 1990-05-03 | 1997-08-13 | E.I. Du Pont De Nemours And Company | Verfahren zur schnellen herstellung cyclischer ester |
US5043458A (en) * | 1990-05-03 | 1991-08-27 | E. I. Du Pont De Nemours And Company | One-step continuous process for preparing cyclic esters |
US5023350A (en) * | 1990-05-24 | 1991-06-11 | E. I. Du Pont De Nemours And Company | Process for the purification of cyclic esters |
US5138074A (en) * | 1990-06-28 | 1992-08-11 | E. I. Du Pont De Nemours And Company | Continuous catalyzed vapor phase dimeric cyclic ester process |
WO1992000974A1 (en) * | 1990-07-13 | 1992-01-23 | E.I. Du Pont De Nemours And Company | High yield recycle process for lactide |
US5332839A (en) * | 1990-09-18 | 1994-07-26 | Biopak Technology, Ltd. | Catalytic production of lactide directly from lactic acid |
US5089632A (en) * | 1991-01-30 | 1992-02-18 | E. I. Du Pont De Nemours And Company | Process for preparing cyclic esters using a fluorocarbon |
-
1992
- 1992-03-19 US US07/854,559 patent/US5319107A/en not_active Expired - Lifetime
-
1993
- 1993-02-17 IL IL104765A patent/IL104765A0/xx unknown
- 1993-03-17 NZ NZ251210A patent/NZ251210A/en unknown
- 1993-03-17 DE DE69320467T patent/DE69320467T2/de not_active Expired - Fee Related
- 1993-03-17 WO PCT/US1993/002483 patent/WO1993019058A2/en active IP Right Grant
- 1993-03-17 JP JP5516722A patent/JP2922303B2/ja not_active Expired - Fee Related
- 1993-03-17 AT AT93907579T patent/ATE169913T1/de not_active IP Right Cessation
- 1993-03-17 BR BR9306101A patent/BR9306101A/pt not_active IP Right Cessation
- 1993-03-17 EP EP93907579A patent/EP0632807B1/de not_active Expired - Lifetime
- 1993-03-17 AU AU38130/93A patent/AU677183B2/en not_active Ceased
- 1993-03-17 MY MYPI93000472A patent/MY116462A/en unknown
- 1993-03-19 CN CN93104488A patent/CN1080921A/zh active Pending
- 1993-05-07 TW TW082103587A patent/TW321645B/zh active
-
1994
- 1994-09-15 FI FI944275A patent/FI115459B/fi not_active IP Right Cessation
- 1994-09-16 NO NO943464A patent/NO943464L/no unknown
- 1994-09-16 KR KR1019940703230A patent/KR950700898A/ko not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
DE69320467T2 (de) | 1999-04-22 |
JPH07504916A (ja) | 1995-06-01 |
EP0632807A1 (de) | 1995-01-11 |
AU3813093A (en) | 1993-10-21 |
WO1993019058A3 (en) | 1993-11-11 |
MY116462A (en) | 2004-02-28 |
EP0632807A4 (de) | 1995-05-03 |
JP2922303B2 (ja) | 1999-07-19 |
US5319107A (en) | 1994-06-07 |
FI944275A0 (fi) | 1994-09-15 |
NO943464D0 (no) | 1994-09-16 |
KR950700898A (ko) | 1995-02-20 |
AU677183B2 (en) | 1997-04-17 |
ATE169913T1 (de) | 1998-09-15 |
WO1993019058A2 (en) | 1993-09-30 |
IL104765A0 (en) | 1993-06-10 |
NO943464L (no) | 1994-11-15 |
CN1080921A (zh) | 1994-01-19 |
NZ251210A (en) | 1996-10-28 |
FI115459B (fi) | 2005-05-13 |
TW321645B (de) | 1997-12-01 |
BR9306101A (pt) | 1995-09-12 |
EP0632807B1 (de) | 1998-08-19 |
FI944275L (fi) | 1994-11-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE69320467D1 (de) | Verfahren zur herstellung von cyclischen estern aus hydroxysäuren und deren derivaten | |
CA2128509A1 (en) | Continuous process for manufacture of lactide polymers with improved purification methods | |
CA2173616A1 (en) | Continuous process for the manufacture of lactide and lactide polymers | |
ATE161819T1 (de) | Verfahren zur herstellung von carbonsäureestern aus carbonsäurehalogeniden und alkoholen | |
DE69205581D1 (de) | Verfahren zur herstellung von 2,2,4,4-tetramethylcyclobutandiol. | |
DE69209770D1 (de) | Verfahren zur Herstellung von Aldehyden und von deren Abkömmlingen | |
DE69817726D1 (de) | Verfahren zur kontinuierlichen herstellung von polyestern | |
AU2002339838A1 (en) | Azeotropic distillation of cyclic esters of hydroxy organic acids | |
DE50308226D1 (de) | Verfahren zur herstellung von 2-(4-n, n-dialkylamino-2-hydroxybenzoyl)benzoes ureestern | |
ATE393151T1 (de) | Laktonisierung im verfahren zur herstellung von statinen | |
EA199900491A1 (ru) | Материал, содержащий продукты полимеризации, и способ его получения | |
DE3765157D1 (de) | Verfahren zur herstellung von macrolid-derivaten. | |
DE69923795D1 (de) | Verfahren zur Herstellung biologisch-abbaubarer Polyester | |
ATE177091T1 (de) | Chinasäurederivate und verfahren zur herstellung von chinasäurederivaten | |
CA2132843A1 (en) | Process for the production of cyclic esters from hydroxy acids and derivatives therefrom | |
ATE9230T1 (de) | Polyolhaltige komponente mit hohem feststoffgehalt und verfahren zur herstellung von polyurethan-harzen daraus. | |
ATE134987T1 (de) | Verfahren zur synthese von succinylobernsternsäuredialkylestern und ihre umwandlung in dialkyl 2,5-diarylamino-3,6- dihydroterephthalsäureester | |
KR910016676A (ko) | α,β-불포화카르복시산 에스테르의 제조 방법 | |
DE59908999D1 (de) | Verfahren zur Herstellung von Polyesterpolyolen | |
ATE231503T1 (de) | Verfahren zur herstellung von dimeren zyklischen estern | |
AU7145096A (en) | Process for preparing polyhydroxy carboxylic acid | |
ATE219505T1 (de) | Verfahren zur herstellung von polyhydroxycarbonsäure | |
DE50013497D1 (de) | Verfahren zur herstellung von flächengebilden aus nachwachsenden rohstoffen | |
ES2114030T3 (es) | Productos de reaccion que contienen azetidinol. | |
KR960031504A (ko) | 디히드록시 화합물을 함유하는 잔류물을 처리하는 방법 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |