GB1122229A - Purification of lactides - Google Patents
Purification of lactidesInfo
- Publication number
- GB1122229A GB1122229A GB5495065A GB5495065A GB1122229A GB 1122229 A GB1122229 A GB 1122229A GB 5495065 A GB5495065 A GB 5495065A GB 5495065 A GB5495065 A GB 5495065A GB 1122229 A GB1122229 A GB 1122229A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lactide
- lactides
- benzene
- heating
- purified
- 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
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)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
High molecular weight polylactide thermoplastics are produced by a process comprising heating a purified lactide (see Division C2) under nitrogen to 103 DEG C. until all of the lactide is melted, and then adding a solution containing 25% diethyl zinc and 75% heptane. The heating is continued with stirring for one hour and the polymer then removed. The examples describe the preparation of polymers from lactide having inherent viscosities of 1.98, 2.43, 2.62 and 1.95.ALSO:Lactides are purified by crystallization under anhydrous conditions from benzene or a mono-, di- or tri-(C1- 4-alkyl) benzene.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US42170264A | 1964-12-28 | 1964-12-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1122229A true GB1122229A (en) | 1968-07-31 |
Family
ID=23671671
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5495065A Expired GB1122229A (en) | 1964-12-28 | 1965-12-28 | Purification of lactides |
Country Status (6)
Country | Link |
---|---|
BE (1) | BE674355A (en) |
DE (1) | DE1280838B (en) |
FR (1) | FR1462616A (en) |
GB (1) | GB1122229A (en) |
NL (1) | NL6516979A (en) |
SE (1) | SE322788B (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4966982A (en) * | 1988-04-27 | 1990-10-30 | Mitsui Toatsu Chemicals, Incorporated | Process for the production of lactide |
WO1992005167A1 (en) * | 1990-09-18 | 1992-04-02 | 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 |
US5332839A (en) * | 1990-09-18 | 1994-07-26 | Biopak Technology, Ltd. | Catalytic production of lactide directly from lactic acid |
US5420304A (en) * | 1992-03-19 | 1995-05-30 | Biopak Technology, Ltd. | Method to produce cyclic esters |
JPH07206851A (en) * | 1994-01-25 | 1995-08-08 | Shimadzu Corp | Method for purifying lactide and method for polymerizing the same |
US5444113A (en) * | 1988-08-08 | 1995-08-22 | Ecopol, Llc | End use applications of biodegradable polymers |
US5556895A (en) * | 1988-08-08 | 1996-09-17 | Ecopol Llc | Degradable polydioxaneone-based materials |
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 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2115472C (en) * | 1993-02-17 | 2002-08-13 | William George O'brien | Melt crystallization purification of lactides |
CN114011462B (en) * | 2021-11-18 | 2023-10-27 | 扬州大学 | Polyaniline loaded zinc catalyst and preparation method and application thereof |
-
1965
- 1965-12-27 SE SE1678365A patent/SE322788B/xx unknown
- 1965-12-27 NL NL6516979A patent/NL6516979A/xx unknown
- 1965-12-27 DE DEP38443A patent/DE1280838B/en active Pending
- 1965-12-27 BE BE674355D patent/BE674355A/xx unknown
- 1965-12-28 FR FR44021A patent/FR1462616A/en not_active Expired
- 1965-12-28 GB GB5495065A patent/GB1122229A/en not_active Expired
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4966982A (en) * | 1988-04-27 | 1990-10-30 | Mitsui Toatsu Chemicals, Incorporated | Process for the production of lactide |
US5760118A (en) * | 1988-08-08 | 1998-06-02 | Chronopol, Inc. | End use applications of biodegradable polymers |
US5556895A (en) * | 1988-08-08 | 1996-09-17 | Ecopol Llc | Degradable polydioxaneone-based materials |
US5801223A (en) * | 1988-08-08 | 1998-09-01 | Lipinsky; Edward S. | Degradable polydioxaneone-based materials |
US5444113A (en) * | 1988-08-08 | 1995-08-22 | Ecopol, Llc | End use applications of biodegradable polymers |
US5767222A (en) * | 1988-08-08 | 1998-06-16 | Chronopol, Inc. | Degradable polydioxaneone-based materials |
WO1992005167A1 (en) * | 1990-09-18 | 1992-04-02 | 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 |
US5332839A (en) * | 1990-09-18 | 1994-07-26 | Biopak Technology, Ltd. | Catalytic production of lactide directly from lactic acid |
US5274127A (en) * | 1990-09-18 | 1993-12-28 | Biopak Technology, Ltd. | Lactide production from dehydration of aqueous lactic acid feed |
US5675021A (en) * | 1992-03-19 | 1997-10-07 | Chronopol, Inc. | Method to produce and purify cyclic esters |
US5750732A (en) * | 1992-03-19 | 1998-05-12 | Chronopol, Inc. | Method to produce cyclic esters |
US5420304A (en) * | 1992-03-19 | 1995-05-30 | Biopak Technology, Ltd. | Method to produce cyclic esters |
US5856523A (en) * | 1992-03-19 | 1999-01-05 | Chronopol, Inc. | Purifying cyclic esters by aqueous solvent extraction and further purification |
US5686630A (en) * | 1993-09-29 | 1997-11-11 | Chronopol, Inc. | Purifying cyclic esters by aqueous solvent extraction |
JPH07206851A (en) * | 1994-01-25 | 1995-08-08 | Shimadzu Corp | Method for purifying lactide and method for polymerizing the same |
JP2959375B2 (en) | 1994-01-25 | 1999-10-06 | 株式会社島津製作所 | Lactide purification and polymerization |
Also Published As
Publication number | Publication date |
---|---|
DE1280838B (en) | 1968-10-24 |
SE322788B (en) | 1970-04-20 |
FR1462616A (en) | 1966-12-16 |
BE674355A (en) | 1966-06-27 |
NL6516979A (en) | 1966-06-29 |
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