Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1992-03-19
1994-06-07
Ivy, C. Warren
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
549379, C07D31900, C07D31912
Patent
active
053191072
ABSTRACT:
Disclosed is a method for producing cyclic esters by the conversion of hydroxy carboxylic acids and their derivatives to their respective cyclic esters. Such cyclic esters, including lactide or glycolide, are particularly useful for producing polymers which can be used to make biodegradable materials, such as biodegradable packaging material. Various methods of cyclic ester production are disclosed, including liquid phase and vapor phase reactions. Also disclosed are various methods for recovering cyclic esters from product-containing streams.
REFERENCES:
patent: 1095205 (1914-05-01), Gruter et al.
patent: 1594843 (1926-08-01), Lawrie
patent: 1995970 (1935-03-01), Dorough
patent: 2163268 (1939-06-01), Carothers et al.
patent: 2174491 (1939-09-01), Watson
patent: 2189572 (1940-02-01), Watson
patent: 2668162 (1954-02-01), Lowe
patent: 2703316 (1955-03-01), Schneider
patent: 2758987 (1956-08-01), Salzberg
patent: 2768973 (1956-10-01), Castle et al.
patent: 3322719 (1967-05-01), Peilstocker
patent: 3435008 (1969-03-01), Schmitt et al.
patent: 3457280 (1969-07-01), Schmitt et al.
patent: 3597450 (1971-08-01), Schmitt et al.
patent: 3736646 (1973-06-01), Schmitt et al.
patent: 3867190 (1975-02-01), Schmitt et al.
patent: 3960152 (1976-06-01), Augurt et al.
patent: 4033938 (1977-07-01), Augurt et al.
patent: 4797468 (1989-01-01), De Vries
patent: 4835293 (1989-05-01), Bhatia
patent: 4990222 (1991-02-01), Aigner et al.
patent: 5023349 (1991-06-01), Bhatia
patent: 5023350 (1991-06-01), Bhatia
patent: 5043458 (1991-08-01), Bhatia
patent: 5053485 (1991-10-01), Nieuwenhuis et al.
patent: 5053522 (1991-10-01), Muller
patent: 5068418 (1991-11-01), Kulprathipanja et al.
patent: 5075115 (1991-12-01), Brine
patent: 5089632 (1992-02-01), Paul
patent: 5091544 (1992-02-01), Bhatia
Bezzi, "The Constitution of Some Polyglycolides", pp. 219-233, 1949, Gazz Chim. Ital., vol. 79.
Bischoff et al., "Ueber das Glycolid und Seine Homologen", pp. 262-265, 1893, Chem. Ber., vol. 26.
Carothers et al., "Studies of Polymerization and Ring Formation. X. The Reversible Polymerization of Six-Membered Cyclic Esters", pp. 761-771, 1932, J. Am. Chem. Soc., vol. 54.
Carothers, "Polymers and Polyfunctionality", pp. 39-53, 1936, Transactions of the Faraday Society, vol. 32.
Deibig et al., "Polytetramethyl Glycolide, I. Synthesis and Properties of Polytetramethyl Glycolide", pp. 123-131, 1971, Die Makromolekulare Chemie, vol. 145.
Deibig et al., "Polytetramethyl Glycolide, II. Thermal Behavior of Polytetramethyl Glycolide", pp. 133-139, 1971, Die Makromolekulare Chemie, vol. 145.
Dietzel et al., "Uber das Chemische Gleichgewicht Zwischen der Milchsaure und Ihren Anhydriden in Wabriger Losung", pp. 1307-1314, 1925, Chem. Ber., vol. 58B.
Hill et al., "Cyclic and Polymeric Formals", pp. 925-928, (1935), J. Am. Chem. Soc., vol. 57.
Imasaka et al., "Synthesis of Degradable Terpolymers Responding to External Stimuli Such as pH, Ionic Strength, and Temperature", pp. 715-722, (1991), Makromol. Chem., vol. 192.
Montgomery, "Acidic Constituents of Lactic Acid-Water Systems", pp. 1466-1468, 1952, J. Am. Chem. Soc., vol. 74.
Bezzi, "Transformation of Cyclic Ester into Linear Polyesters", pp. 215-224, (1938), Gazz. Chim. Ital., vol. 68.
Bezzi et al., "Dehydration Products of Lactic Acid Typifying the Transformation of Cyclic Esters into Linear Polyesters", 1936, Meeting of the Italian Academy of Science, Nov.
Filachione et al., "Lactic Acid Condensation Polymers: Preparation by Batch and Continuous Methods", pp. 223-228, 1944, Industrial and Engineering Chemistry, Mar., vol. 36, No. 3.
Holten, "Lactic Acid. Properties and Chemistry of Lactic Acid and Derivatives", pp. 221-231, 1971, Verlag Chemie.
Ikada et al., "Stereocomplex Formation Between Enantiomeric Poly(Lactides)", pp. 904-906, 1987, American Chemical Society, Macromolecules, 20.
Jackanicz et al., "Polylactic Acid as a Biodegradable Carrier for Contraceptive Steroids", pp. 227-234, 1973, The Population Counsel, Sep., vol. 8, No. 3.
Jungfleisch et al., "Organic Chemistry--of Lactyllactyllactic Acid and the Dilactide of Racemic Lactic Acid", pp. 502-505, 1905, Academie des Sciences, Meeting of Feb. 20.
Jungfleisch et al., "Organic Chemistry--on the Dilactide of the Right", pp. 111-113, 1905, Academie des Sciences, Meeting of Jul. 10.
Jungfleisch et al., "Organic Chemistry--on the Dilactide of Left Lactic Acid", pp. 637-639, 1906, Meeting of Mar. 12.
Jungfleisch et al., "Organic Chemistry--on Ethyl Lactyllactate", 1907, Academie des Sciences, Meeting of Feb. 25.
Jungfleisch et al., "Organic Chemistry--on Inactive Dilactylic Acid", p. 979, 1907, Academie des Sciences, Meeting of May 6.
Kleine et al., "High Molecular Weight, Especially Optically Active Polyesters of Lactic Acid: An Investigation of the Stereochemistry of Macromolecular Compounds", pp. 1-21, 1958, Report from the Research Laboratory for Macromolecular Chemistry, Dec.
Kulkarni et al., "Polyactic Acid for Surgical Implants", pp. 839-843, 1966, Arch. Surg., vol. 93, Nov.
Light, "Lactic Acid Resins", pp. 135-136, 1940, Paint Manufacture, Jun.
Watson, "Composition of Lactic Acid. Production of a Highly Concentrated Acid", pp. 399-401, 1940, Industrial and Engineering Chemistry, vol. 32, No. 3.
Wise, "Biopolymeric Controlled Release Systems", pp. 3-28, 1984, CRC Press, vol. 1.
Wise, "Biopolymeric Controlled Release Systems", pp. 187-199, CRC Press, vol. 2.
Wise et al., "Lactic/Glycolic Acid Polymers", pp. 237-270, Dynatech R/D Company, Cambridge, Mass., U.S.A., 1984.
Wislicenus, "On the Optically Active Lactic Acid of Sarcolactic Liquid, the Paralactic Acid", pp. 318-319, 1873, Liebigs Ann. Chem., vol. 167.
Benecke Herman P.
Cheung Alex
Cremeans George E.
Hillman Melville E. D.
Lipinsky Edward S.
BioPak Technology, Ltd.
Covington Raymond
Ivy C. Warren
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