Process and activated carbon catalyst for ring-opening...

Details Process and activated carbon catalyst for ring-opening... Process and activated carbon catalyst for ring-opening...

Filed on

2006-02-03

Date issued

2009-11-24

Examiner

Choi, Ling-Siu (Department: 1796)

Patent Class

Synthetic resins or natural rubbers -- part of the class 520 ser

SubClass

Synthetic resins

SubSubClass

From carboxylic acid or derivative thereof

Other Related Categories

C528S355000, C528S359000, C528S271000, C528S425000

Type

Reexamination Certificate

Status

active

Patent number

07622547

Description

ABSTRACT:
A lactone compound represented by following General Formula (1), such as ε-caprolactone, is reacted in the presence of a powdered activated carbon where necessary with an initiator such as a polyhydric alcohol, an aliphatic alcohol, or an aliphatic carboxylic acid to thereby yield, for example, a polylactone, a polylactone alkyl ether, or a polylactone alkyl ester.[Chemical Formula 1]Wherein R1is an alkylene group having two to eighteen carbon atoms which may be substituted with one or more alkyl groups each having one to ten carbon atoms. Accordingly, a target compound can be produced in a high yield with high quality, from which the catalyst can be easily removed.

REFERENCES:
patent: 4399310 (1983-08-01), Greco
patent: 4663429 (1987-05-01), Murai et al.
patent: 2003/0114704 (2003-06-01), Fuchs
patent: 2005/0080226 (2005-04-01), Watanabe
patent: 1 473 315 (2004-11-01), None
patent: 1-49340 (1989-10-01), None
patent: 2000-7765 (2000-01-01), None

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