GB1194501A - Process for Preparing Substantially Pure Glycolide - Google Patents

Process for Preparing Substantially Pure Glycolide

Info

Publication number
GB1194501A
GB1194501A GB14368A GB14368A GB1194501A GB 1194501 A GB1194501 A GB 1194501A GB 14368 A GB14368 A GB 14368A GB 14368 A GB14368 A GB 14368A GB 1194501 A GB1194501 A GB 1194501A
Authority
GB
United Kingdom
Prior art keywords
glycolide
substantially pure
layer
temperature
cooling surface
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
Application number
GB14368A
Inventor
Edward Emil Schmitt
Martin Epstein
Rocco Albert Polistina
David Anthony De Prospero
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wyeth Holdings LLC
Original Assignee
American Cyanamid Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by American Cyanamid Co filed Critical American Cyanamid Co
Publication of GB1194501A publication Critical patent/GB1194501A/en
Expired legal-status Critical Current

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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Polyesters Or Polycarbonates (AREA)
  • Medicinal Preparation (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Polyamides (AREA)

Abstract

1,194,501. Glycolide. AMERICAN CYANAMID CO. 1 Jan., 1968 [14 Feb., 1967], No. 143/68. Heading C2C. Substantially pure glycolide of the formula is prepared from a recrystallized partially purified glycolide containing some impurities by heating a layer of partially purified glycolide to a temperature of from 85‹ to 130‹ C. under a pressure not greater than 2À5 mm. of mercury absolute, while providing a cooling surface, cooled constantly to a temperature not greater than 42‹ C., positioned vertically immediately above the glycolide layer, whereby the glycolide is sublimed and becomes deposited in substantially pure form on the cooling surface from where it may be recovered. The glycolide so purified is suitable for polymerization to a high molecular weight polymer.
GB14368A 1967-02-14 1968-01-01 Process for Preparing Substantially Pure Glycolide Expired GB1194501A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US61593167A 1967-02-14 1967-02-14

Publications (1)

Publication Number Publication Date
GB1194501A true GB1194501A (en) 1970-06-10

Family

ID=24467362

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14368A Expired GB1194501A (en) 1967-02-14 1968-01-01 Process for Preparing Substantially Pure Glycolide

Country Status (4)

Country Link
CH (1) CH493515A (en)
DE (1) DE1643773B2 (en)
DK (1) DK129933B (en)
GB (1) GB1194501A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992005138A1 (en) * 1990-09-20 1992-04-02 E.I. Du Pont De Nemours And Company Manufacture of high-purity hydroxyacetic acid

Also Published As

Publication number Publication date
DE1643773C3 (en) 1973-11-22
DE1643773A1 (en) 1972-03-09
DE1643773B2 (en) 1973-04-26
CH493515A (en) 1970-07-15
DK129933C (en) 1975-05-20
DK129933B (en) 1974-12-02

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee