DE1668993B2 - Verfahren zur isolierung von alpha-glycolid - Google Patents
Verfahren zur isolierung von alpha-glycolidInfo
- Publication number
- DE1668993B2 DE1668993B2 DE19681668993 DE1668993A DE1668993B2 DE 1668993 B2 DE1668993 B2 DE 1668993B2 DE 19681668993 DE19681668993 DE 19681668993 DE 1668993 A DE1668993 A DE 1668993A DE 1668993 B2 DE1668993 B2 DE 1668993B2
- Authority
- DE
- Germany
- Prior art keywords
- glycolide
- isolating alpha
- isolating
- alpha
- 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.)
- Granted
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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/06—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from hydroxycarboxylic acids
- C08G63/08—Lactones or lactides
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Polyesters Or Polycarbonates (AREA)
- Saccharide Compounds (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Medicinal Preparation (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US64550267A | 1967-06-12 | 1967-06-12 |
Publications (3)
Publication Number | Publication Date |
---|---|
DE1668993A1 DE1668993A1 (de) | 1972-03-23 |
DE1668993B2 true DE1668993B2 (de) | 1973-07-12 |
DE1668993C3 DE1668993C3 (de) | 1974-02-07 |
Family
ID=24589277
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1668993A Expired DE1668993C3 (de) | 1967-06-12 | 1968-03-05 | Verfahren zur Isolierung von alpha-Glycolid |
Country Status (8)
Country | Link |
---|---|
US (1) | US3457280A (de) |
BE (1) | BE714117A (de) |
CH (1) | CH543501A (de) |
DE (1) | DE1668993C3 (de) |
ES (1) | ES354952A1 (de) |
FR (1) | FR1560162A (de) |
NL (1) | NL159382B (de) |
SE (2) | SE356047B (de) |
Families Citing this family (38)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3912692A (en) * | 1973-05-03 | 1975-10-14 | American Cyanamid Co | Process for polymerizing a substantially pure glycolide composition |
US4716964A (en) * | 1981-08-10 | 1988-01-05 | Exxon Production Research Company | Use of degradable ball sealers to seal casing perforations in well treatment fluid diversion |
US4727163A (en) * | 1985-07-11 | 1988-02-23 | E. I. Du Pont De Nemours And Company | Process for preparing highly pure cyclic esters |
US4650851A (en) * | 1986-03-19 | 1987-03-17 | Pfizer Hospital Products Group, Inc. | Purification of glycolide |
DE3781133T2 (de) * | 1986-12-19 | 1993-06-24 | Akzo Nv | Herstellung von polymilchsaeure 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 |
US5274127A (en) * | 1990-09-18 | 1993-12-28 | Biopak Technology, Ltd. | Lactide production from dehydration of aqueous lactic acid feed |
US5319107A (en) * | 1990-09-18 | 1994-06-07 | Biopak Technology, Ltd. | Method to produce cyclic esters |
US5223630A (en) * | 1989-10-10 | 1993-06-29 | E. I. Du Pont De Nemours And Company | Glycolide purification process |
US5043458A (en) * | 1990-05-03 | 1991-08-27 | E. I. Du Pont De Nemours And Company | One-step continuous process for preparing cyclic esters |
US5332839A (en) * | 1990-09-18 | 1994-07-26 | Biopak Technology, Ltd. | Catalytic production of lactide directly from lactic acid |
US5675021A (en) * | 1992-03-19 | 1997-10-07 | Chronopol, Inc. | Method to produce and purify cyclic esters |
US5686630A (en) * | 1993-09-29 | 1997-11-11 | Chronopol, Inc. | Purifying cyclic esters by aqueous solvent extraction |
US5420304A (en) * | 1992-03-19 | 1995-05-30 | Biopak Technology, Ltd. | Method to produce cyclic esters |
US6074673A (en) * | 1996-04-22 | 2000-06-13 | Guillen; Manuel | Slow-release, self-absorbing, drug delivery system |
WO2007011708A2 (en) | 2005-07-15 | 2007-01-25 | Micell Technologies, Inc. | Stent with polymer coating containing amorphous rapamycin |
WO2007011707A2 (en) | 2005-07-15 | 2007-01-25 | Micell Technologies, Inc. | Polymer coatings containing drug powder of controlled morphology |
PL2019657T3 (pl) | 2006-04-26 | 2015-10-30 | Micell Technologies Inc | Powłoki zawierające wiele leków |
US9539593B2 (en) | 2006-10-23 | 2017-01-10 | Micell Technologies, Inc. | Holder for electrically charging a substrate during coating |
US11426494B2 (en) | 2007-01-08 | 2022-08-30 | MT Acquisition Holdings LLC | Stents having biodegradable layers |
CA2679712C (en) | 2007-01-08 | 2016-11-15 | Micell Technologies, Inc. | Stents having biodegradable layers |
JP2010527746A (ja) | 2007-05-25 | 2010-08-19 | ミセル テクノロジーズ、インコーポレイテッド | メディカルデバイスコーティング用ポリマーフィルム |
CN102083397B (zh) | 2008-04-17 | 2013-12-25 | 米歇尔技术公司 | 具有生物可吸收层的支架 |
US9486431B2 (en) | 2008-07-17 | 2016-11-08 | Micell Technologies, Inc. | Drug delivery medical device |
US8834913B2 (en) | 2008-12-26 | 2014-09-16 | Battelle Memorial Institute | Medical implants and methods of making medical implants |
US9981072B2 (en) | 2009-04-01 | 2018-05-29 | Micell Technologies, Inc. | Coated stents |
WO2010121187A2 (en) | 2009-04-17 | 2010-10-21 | Micell Techologies, Inc. | Stents having controlled elution |
EP2453834A4 (de) | 2009-07-16 | 2014-04-16 | Micell Technologies Inc | Medizinische wirkstofffreisetzungsvorrichtung |
EP2531140B1 (de) | 2010-02-02 | 2017-11-01 | Micell Technologies, Inc. | Stent und stenteinsatzsystem mit verbesserter einsetzbarkeit |
US8795762B2 (en) | 2010-03-26 | 2014-08-05 | Battelle Memorial Institute | System and method for enhanced electrostatic deposition and surface coatings |
US10232092B2 (en) | 2010-04-22 | 2019-03-19 | Micell Technologies, Inc. | Stents and other devices having extracellular matrix coating |
CA2805631C (en) | 2010-07-16 | 2018-07-31 | Micell Technologies, Inc. | Drug delivery medical device |
US10464100B2 (en) | 2011-05-31 | 2019-11-05 | Micell Technologies, Inc. | System and process for formation of a time-released, drug-eluting transferable coating |
US10117972B2 (en) | 2011-07-15 | 2018-11-06 | Micell Technologies, Inc. | Drug delivery medical device |
US10188772B2 (en) | 2011-10-18 | 2019-01-29 | Micell Technologies, Inc. | Drug delivery medical device |
EP2967803B1 (de) | 2013-03-12 | 2023-12-27 | Micell Technologies, Inc. | Bioabsorbierbare biomedizinische implantate |
WO2014186532A1 (en) | 2013-05-15 | 2014-11-20 | Micell Technologies, Inc. | Bioabsorbable biomedical implants |
CN110684011B (zh) * | 2018-07-06 | 2021-02-09 | 中国石油化工股份有限公司 | 乙交酯的制备方法 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2668162A (en) * | 1952-03-20 | 1954-02-02 | Du Pont | Preparation of high molecular weight polyhydroxyacetic ester |
-
1967
- 1967-06-12 US US645502A patent/US3457280A/en not_active Expired - Lifetime
-
1968
- 1968-03-05 DE DE1668993A patent/DE1668993C3/de not_active Expired
- 1968-04-19 FR FR1560162D patent/FR1560162A/fr not_active Expired
- 1968-04-24 BE BE714117D patent/BE714117A/xx unknown
- 1968-05-08 NL NL6806492.A patent/NL159382B/xx not_active IP Right Cessation
- 1968-06-10 CH CH856168A patent/CH543501A/de not_active IP Right Cessation
- 1968-06-12 SE SE07911/68A patent/SE356047B/xx unknown
- 1968-06-12 SE SE7111003A patent/SE378597B/xx unknown
- 1968-06-12 ES ES354952A patent/ES354952A1/es not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US3457280A (en) | 1969-07-22 |
CH543501A (de) | 1973-12-14 |
SE378597B (de) | 1975-09-08 |
ES354952A1 (es) | 1970-03-01 |
FR1560162A (de) | 1969-03-14 |
DE1668993C3 (de) | 1974-02-07 |
BE714117A (de) | 1968-10-24 |
SE356047B (de) | 1973-05-14 |
NL6806492A (de) | 1968-12-13 |
DE1668993A1 (de) | 1972-03-23 |
NL159382B (nl) | 1979-02-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C3 | Grant after two publication steps (3rd publication) | ||
E77 | Valid patent as to the heymanns-index 1977 | ||
8339 | Ceased/non-payment of the annual fee |