PH30804A - Method to produce cyclic esters. - Google Patents
Method to produce cyclic esters.Info
- Publication number
- PH30804A PH30804A PH49051A PH49051A PH30804A PH 30804 A PH30804 A PH 30804A PH 49051 A PH49051 A PH 49051A PH 49051 A PH49051 A PH 49051A PH 30804 A PH30804 A PH 30804A
- Authority
- PH
- Philippines
- Prior art keywords
- cyclic esters
- starting materials
- recovery
- production
- molecular weight
- Prior art date
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
- 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
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Polymers & Plastics (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Medicinal Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Heterocyclic Compounds That Contain Two Or More Ring Oxygen Atoms (AREA)
- Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/128,797 US5420304A (en) | 1992-03-19 | 1993-09-29 | Method to produce cyclic esters |
Publications (1)
Publication Number | Publication Date |
---|---|
PH30804A true PH30804A (en) | 1997-10-17 |
Family
ID=22437018
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PH49051A PH30804A (en) | 1993-09-29 | 1994-09-23 | Method to produce cyclic esters. |
Country Status (15)
Country | Link |
---|---|
US (2) | US5420304A (de) |
EP (1) | EP0722433B1 (de) |
JP (1) | JPH09502997A (de) |
CN (1) | CN1136309A (de) |
AT (1) | ATE189204T1 (de) |
AU (1) | AU7726794A (de) |
BR (1) | BR9407655A (de) |
CA (1) | CA2172798A1 (de) |
DE (1) | DE69422819D1 (de) |
FI (1) | FI961402A0 (de) |
MY (1) | MY113939A (de) |
PH (1) | PH30804A (de) |
TW (1) | TW321646B (de) |
WO (1) | WO1995009142A1 (de) |
ZA (2) | ZA961426B (de) |
Families Citing this family (56)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0669151B1 (de) * | 1994-02-24 | 2003-03-26 | Matsushita Electric Industrial Co., Ltd. | Verfahren zur Extraktion organischer Substanz, in diesem Verfahren zu verwendendes Lösungsmittel und Verfahren zur Messung des Gehaltes an organischer Substanz |
US5856567A (en) * | 1995-06-07 | 1999-01-05 | Novus International, Inc. | Continuous hydrolysis process for preparing 2-hydroxy-4-methylthiobutanioc acid or salts thereof |
EP0832062B1 (de) | 1995-06-07 | 2001-09-12 | Novus International, Inc. | Kontinuerliches hydrolyse-verfahren zur herstellung von 2-hydroxy-4-methylthiobutansäure oder salze davon |
US5830991A (en) * | 1996-02-09 | 1998-11-03 | Kureha Kagaku Kagyo Kk | Preparation process and purification process of dimeric cyclic ester of hydroxycarboxylic acid |
US6229046B1 (en) | 1997-10-14 | 2001-05-08 | Cargill, Incorported | Lactic acid processing methods arrangements and products |
US6475759B1 (en) * | 1997-10-14 | 2002-11-05 | Cargill, Inc. | Low PH lactic acid fermentation |
US6313319B1 (en) | 1998-09-25 | 2001-11-06 | Shimadzu Corporation | Method for purifying lactide and lactide for food additives |
US7074603B2 (en) * | 1999-03-11 | 2006-07-11 | Zeachem, Inc. | Process for producing ethanol from corn dry milling |
ES2400285T3 (es) * | 1999-03-11 | 2013-04-08 | Zeachem, Inc. | Proceso para producir etanol |
IL132289A (en) * | 1999-10-08 | 2003-12-10 | Staley Mfg Co A E | Process for conversion of an extracted carboxylic acid to a non-ionized product |
NL1013682C2 (nl) * | 1999-11-26 | 2001-05-30 | Purac Biochem Bv | Werkwijze en inrichting voor het zuiveren van een waterige oplossing van melkzuur. |
FR2802923B1 (fr) * | 1999-12-28 | 2002-03-08 | Roquette Freres | Procede de preparation d'une composition d'ester d'acide lactique et son utilisation en tant que solvant |
US6509179B1 (en) | 2000-10-12 | 2003-01-21 | Barbara I. Veldhuis-Stribos | Continuous process for preparing lactic acid |
US6984293B2 (en) * | 2001-03-15 | 2006-01-10 | Tate & Lyle Ingredients | Azeotropic distillation of cyclic esters of hydroxy organic acids |
US6916959B2 (en) * | 2001-05-11 | 2005-07-12 | Nippon Shokubai Co., Ltd. | Halogen-containing aromatic compound |
EP1300387A1 (de) * | 2001-10-05 | 2003-04-09 | Haltermann GmbH | Verfahren zum Herstellen von Estern einer Hydroxysäure |
EP1513940A4 (de) | 2002-05-30 | 2006-10-25 | Cargill Dow Llc | Verfahren und materialien zur produktion von milchsäure in hefe |
EP1626979B1 (de) | 2003-05-02 | 2012-06-06 | Cargill, Incorporated | Genetisch modifizierte hefeart und fermentationsverfahren, bei denen die genetisch modifizierte hefe eingesetzt wird |
MX306561B (es) * | 2004-01-29 | 2013-01-09 | Zeachem Inc | Recuperacion de acidos organicos. |
US7652167B2 (en) * | 2004-07-19 | 2010-01-26 | Board Of Trustees Of Michigan State University | Process for production of organic acid esters |
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 |
AU2006291566A1 (en) | 2005-06-02 | 2007-03-22 | Cargill, Inc. | Genetically modified yeast of the species issatchenkia orientalis and closely related species and fermentation processes using same |
JP5121070B2 (ja) | 2005-11-23 | 2013-01-16 | ネイチャーワークス・エル・エル・シー | L−又はd−ラクタート:フェリチトクロームc酸化還元酵素遺伝子が機能しない乳酸産生酵母 |
CN100545159C (zh) * | 2005-12-19 | 2009-09-30 | 奇美实业股份有限公司 | α-羟基有机酸环酯类化合物的制造方法 |
JP5443970B2 (ja) | 2006-03-13 | 2014-03-19 | カーギル インコーポレイテッド | ジヒドロキシアセトンリン酸からグリセロールへの経路が破壊された酵母細胞 |
JP5083775B2 (ja) | 2006-03-29 | 2012-11-28 | Bio−energy株式会社 | 乳酸発酵液からの乳酸成分の分離方法および分離装置 |
DE102006055427A1 (de) * | 2006-11-22 | 2008-05-29 | Evonik Röhm Gmbh | Verfahren zur Herstellung von Tetramethylglycolid |
AU2008212826A1 (en) * | 2007-02-09 | 2008-08-14 | Zeachem Inc. | Energy efficient methods to produce products |
JP2008239601A (ja) * | 2007-02-26 | 2008-10-09 | Sumitomo Chemical Co Ltd | ラクチド化合物の製造方法 |
EP2133346A1 (de) * | 2008-06-12 | 2009-12-16 | Ktanton Ltd | Herstellungsverfahren eines zyklischen Diesters einer Alphahydroxylsäure (AHA) |
KR101154029B1 (ko) | 2009-05-20 | 2012-06-07 | 한국화학연구원 | 젖산에스테르로부터 락타이드의 직접 전환용 촉매 및 이를 이용한 락타이드의 제조방법 |
EP2407463A1 (de) | 2010-07-14 | 2012-01-18 | Solvay SA | Verfahren zur Herstellung eines cyclischen Diesters einer alpha-Hydroxysäure |
EP2633027B1 (de) | 2010-10-28 | 2014-06-04 | Total Research & Technology Feluy SA | Verfahren zur herstellung von polymilchsäure unter verwendung von monascus |
MX2013005654A (es) | 2010-11-22 | 2013-07-17 | Novozymes Inc | Composiciones y metodos para la produccion de acido 3-hidroxipropionico. |
WO2012103261A2 (en) | 2011-01-25 | 2012-08-02 | Finley Kenneth R | Compositions and methods for succinate production |
WO2013119959A1 (en) | 2012-02-09 | 2013-08-15 | Novus International Inc. | Heteroatom containing cyclic dimers |
CA2878617A1 (en) | 2012-07-12 | 2014-01-16 | Houston Stephen Smith | Matrix and layer compositions for protection of bioactives |
US9850507B2 (en) | 2012-07-25 | 2017-12-26 | Cargill, Incorporated | Yeast cells having reductive TCA pathway from pyruvate to succinate and overexpressing an exogenous NAD(P)+ transhydrogenase enzyme |
EP2725019B1 (de) * | 2012-10-26 | 2015-04-08 | Uhde Inventa-Fischer GmbH | Verfahren zur Herstellung cyclischer Diester, insbesondere Dilactid |
CA2891130A1 (en) | 2012-11-30 | 2014-06-05 | Novozymes, Inc. | 3-hydroxypropionic acid production by recombinant yeasts |
CN105431520A (zh) | 2013-07-31 | 2016-03-23 | 诺维信公司 | 利用表达昆虫天冬氨酸1-脱羧酶的重组酵母的3-羟基丙酸生产 |
WO2016100910A1 (en) | 2014-12-19 | 2016-06-23 | Novozymes A/S | Recombinant host cells for the production of 3-hydroxypropionic acid |
EP3056490A1 (de) * | 2015-02-13 | 2016-08-17 | PURAC Biochem BV | Verfahren zur Herstellung von Lactid |
EP3262161B1 (de) | 2015-02-27 | 2021-06-30 | Novozymes A/S | Mutante wirtszellen zur herstellung von 3-hydroxypropionsäure |
US20180265902A1 (en) | 2015-08-24 | 2018-09-20 | Novozymes A/S | Beta-Alanine Aminotransferases For The Production of 3-Hydroxypropionic Acid |
KR102547252B1 (ko) * | 2016-01-08 | 2023-06-23 | 에스케이이노베이션 주식회사 | 유기물질 기상탈수반응 원료의 제조방법 |
CN106397389B (zh) * | 2016-09-07 | 2019-01-29 | 南京大学 | 一种合成乙交酯的工艺方法 |
CN106554342A (zh) * | 2016-10-26 | 2017-04-05 | 中国地质大学(武汉) | 3,6‑二氯甲基乙交酯及其制备方法和用途 |
TWI780152B (zh) | 2017-05-12 | 2022-10-11 | 日商中外製藥股份有限公司 | 環狀有機化合物的製造方法 |
US10584306B2 (en) | 2017-08-11 | 2020-03-10 | Board Of Regents Of The University Of Oklahoma | Surfactant microemulsions |
CN112574165B (zh) * | 2020-12-30 | 2022-01-07 | 安徽丰原生物技术股份有限公司 | 一步转化生成丙交酯的方法 |
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 |
CN115028615B (zh) * | 2022-07-27 | 2024-01-09 | 万华化学(四川)有限公司 | 一种l,l-丙交酯及其制备方法和应用 |
CN115417851A (zh) * | 2022-08-30 | 2022-12-02 | 中国科学院长春应用化学研究所 | 一种乳酸直接制备丙交酯的方法 |
EP4389740A1 (de) * | 2022-12-21 | 2024-06-26 | Röhm GmbH | Polymerisierbares tetramethylglycolid |
Family Cites Families (57)
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 |
US1906068A (en) * | 1931-03-02 | 1933-04-25 | Grasselli Chemical Co | 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 |
US3371112A (en) * | 1964-12-18 | 1968-02-27 | Allied Chem | Purification of crude malic acid liquors |
BE674355A (de) * | 1964-12-28 | 1966-06-27 | ||
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 |
US3736646A (en) * | 1971-10-18 | 1973-06-05 | American Cyanamid Co | Method of attaching surgical needles to multifilament polyglycolic acid absorbable sutures |
US3867190A (en) * | 1971-10-18 | 1975-02-18 | American Cyanamid Co | Reducing capillarity of polyglycolic acid 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 |
US4045418A (en) * | 1975-01-28 | 1977-08-30 | Gulf Oil Corporation | Copolymers of D,L-lactide and epsilon caprolactone |
US4070375A (en) * | 1976-08-05 | 1978-01-24 | Chevron Research Company | Process for preparing 1,4-dioxan-2-ones |
US4435595A (en) * | 1982-04-26 | 1984-03-06 | Eastman Kodak Company | Reactive distillation process for the production of methyl acetate |
FR2583413B1 (fr) * | 1985-06-14 | 1987-11-20 | Rhone Poulenc Spec Chim | Procede de preparation de trifluoroacetate de methyle. |
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 |
US4771001A (en) * | 1986-03-27 | 1988-09-13 | Neurex Corp. | Production of lactic acid by continuous fermentation using an inexpensive raw material and a simplified method of lactic acid purification |
EP0261572A1 (de) * | 1986-09-20 | 1988-03-30 | Boehringer Ingelheim Kg | Verfahren zur Herstellung von Lactid |
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 |
DE3778111D1 (de) * | 1986-10-24 | 1992-05-14 | Boehringer Ingelheim Kg | Verfahren zur herstellung und reinigung thermolabiler verbindungen. |
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 |
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. |
EP0339882A1 (de) * | 1988-04-27 | 1989-11-02 | MITSUI TOATSU CHEMICALS, Inc. | Verfahren zur Herstellung von Lactide |
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 |
US5068418A (en) * | 1989-05-08 | 1991-11-26 | Uop | Separation of lactic acid from fermentation broth with an anionic polymeric absorbent |
US4939294A (en) * | 1989-05-22 | 1990-07-03 | Eastman Kodak Company | Preparation of ultra high purity methyl acetate |
US5075115A (en) * | 1990-04-02 | 1991-12-24 | Fmc Corporation | Process for polymerizing poly(lactic acid) |
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 |
US5043458A (en) * | 1990-05-03 | 1991-08-27 | E. I. Du Pont De Nemours And Company | One-step continuous process for preparing cyclic esters |
JPH05506242A (ja) * | 1990-05-03 | 1993-09-16 | イー・アイ・デユポン・ドウ・ヌムール・アンド・カンパニー | 環状エステルの迅速製造のための改良法 |
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 |
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 |
US5089632A (en) * | 1991-01-30 | 1992-02-18 | E. I. Du Pont De Nemours And Company | Process for preparing cyclic esters using a fluorocarbon |
US5236560A (en) * | 1992-03-13 | 1993-08-17 | E. I. Du Pont De Nemours And Company | Solventless dimeric cyclic ester distillation process |
US5264592A (en) * | 1992-09-08 | 1993-11-23 | Camelot Technologies Inc. | Lactide melt recrystallization |
US5310599A (en) * | 1993-05-06 | 1994-05-10 | E. I. Du Pont De Nemours And Company | Method for making polymers of alpha-hydroxy acids |
-
1993
- 1993-09-29 US US08/128,797 patent/US5420304A/en not_active Expired - Fee Related
-
1994
- 1994-09-13 WO PCT/US1994/010286 patent/WO1995009142A1/en active IP Right Grant
- 1994-09-13 DE DE69422819T patent/DE69422819D1/de not_active Expired - Lifetime
- 1994-09-13 CN CN94194326A patent/CN1136309A/zh active Pending
- 1994-09-13 AT AT94928095T patent/ATE189204T1/de not_active IP Right Cessation
- 1994-09-13 EP EP94928095A patent/EP0722433B1/de not_active Expired - Lifetime
- 1994-09-13 JP JP7510327A patent/JPH09502997A/ja active Pending
- 1994-09-13 BR BR9407655A patent/BR9407655A/pt not_active IP Right Cessation
- 1994-09-13 AU AU77267/94A patent/AU7726794A/en not_active Abandoned
- 1994-09-13 CA CA002172798A patent/CA2172798A1/en not_active Abandoned
- 1994-09-16 ZA ZA961426A patent/ZA961426B/xx unknown
- 1994-09-16 ZA ZA947211A patent/ZA947211B/xx unknown
- 1994-09-23 PH PH49051A patent/PH30804A/en unknown
- 1994-09-27 MY MYPI94002566A patent/MY113939A/en unknown
-
1995
- 1995-02-13 TW TW083112073A patent/TW321646B/zh active
- 1995-05-19 US US08/444,954 patent/US5750732A/en not_active Expired - Lifetime
-
1996
- 1996-03-27 FI FI961402A patent/FI961402A0/fi not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
ATE189204T1 (de) | 2000-02-15 |
CA2172798A1 (en) | 1995-04-06 |
AU7726794A (en) | 1995-04-18 |
MY113939A (en) | 2002-06-29 |
ZA961426B (en) | 1996-06-18 |
ZA947211B (en) | 1996-06-18 |
US5750732A (en) | 1998-05-12 |
TW321646B (de) | 1997-12-01 |
CN1136309A (zh) | 1996-11-20 |
US5420304A (en) | 1995-05-30 |
EP0722433A1 (de) | 1996-07-24 |
EP0722433B1 (de) | 2000-01-26 |
JPH09502997A (ja) | 1997-03-25 |
DE69422819D1 (de) | 2000-03-02 |
WO1995009142A1 (en) | 1995-04-06 |
FI961402A (fi) | 1996-03-27 |
FI961402A0 (fi) | 1996-03-27 |
EP0722433A4 (de) | 1996-07-31 |
BR9407655A (pt) | 1997-01-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
PH30804A (en) | Method to produce cyclic esters. | |
ATE88442T1 (de) | Verfahren zur trennung von zucker und konzentrierter schwefelsaeure. | |
TW331646B (en) | Produce cyclic ester. | |
AU6615894A (en) | Recovery of citric acid from impure process streams by addition of strong acids and salts thereof | |
GB1488773A (en) | Process for the preparation of propylene oxide | |
DE60110932D1 (de) | Kontinuierliches verfahren zur herstellung von l-ascorbinsäure | |
JPS5821621B2 (ja) | ユウキヨウザイチユウ ノ ペルカルボンサンヨウエキ ノ セイホウ | |
SU719497A3 (ru) | Способ рекуперации перекиси водорода | |
ES2189764T3 (es) | Proceso para la separacion y purificacion de una mezcla acuosa que tiene como componentes principales acido acetico y acido formico. | |
JPH11292802A (ja) | 改良された酸化プロピレンとスチレン単量体の同時製造方法 | |
GB1489037A (en) | Process for the preparation of organic solutions of percarboxylic acids | |
US2915558A (en) | Process for the separation of diisopropylbenzene dihydroperoxides | |
US4897085A (en) | Recovery of hydrogen peroxide | |
JP2505836B2 (ja) | 粗イソプロピルアルコ―ルの精製方法 | |
AU2002233613A1 (en) | Process and apparatus for the production of calcium bromide by liquid-liquid extraction | |
JPS5829790B2 (ja) | 有機溶媒中過カルボン酸の連続製造法 | |
GB1495481A (en) | Process for the obtaining of isobutylene of high purity | |
PH20955A (en) | Process for purifying wet-processed phosphoric acid | |
JPH05186391A (ja) | 酢酸エチルの精製法 | |
JPH0782247A (ja) | 第3級ブチルハイドロパーオキシド含有混合物の製造方法 | |
CN114539081B (zh) | 一种利用n,n-二丁基乙醇胺分离提纯甘氨酸的方法 | |
HU208306B (en) | Process for purifying paraffin sulfonic acids | |
GB1497970A (en) | Process for the preparation of propylene oxide | |
US4296251A (en) | Synthesis of (+)-cis-homocaronic acid | |
ATE555077T1 (de) | Hochkonzentrierte wässrige lösungen von n,n- dialkyl-glyzinen und verfahren zu deren herstellung |