Title:
【発明の名称】ヒドロキシ酸及びその誘導体からの環状エステルの製造方法
Document Type and Number:
Japanese Patent JP2922303
Kind Code:
B2
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.
Inventors:
BENETSUKI HAAMAN PII
CHAN ARETSUKUSU
KUREMENSU JOOJI II
HIRUMAN MERUBIRU II DEII
RIPINSUKII EDOWAADO ESU
MAAKURU RICHAADO EE
SHINKUREAA RICHAADO JII
CHAN ARETSUKUSU
KUREMENSU JOOJI II
HIRUMAN MERUBIRU II DEII
RIPINSUKII EDOWAADO ESU
MAAKURU RICHAADO EE
SHINKUREAA RICHAADO JII
Application Number:
JP51672293A
Publication Date:
July 19, 1999
Filing Date:
March 17, 1993
Export Citation:
Assignee:
BAIOPATSUKU TEKUNOROJII LTD
International Classes:
B01J21/04; C07D319/12; C08J5/18; C08L67/04; C09D167/04; (IPC1-7): C07D319/12
Domestic Patent References:
| JP6504762A | ||||
| JP3516063A |
Other References:
【文献】国際公開92/292(WO,A1)
【文献】国際公開91/17155(WO,A1)
【文献】国際公開91/17155(WO,A1)
Attorney, Agent or Firm:
Hironobu Onda