METHOD FOR DECOMPOSING ESTER OLIGOMER AND METHOD FOR PRODUCING 4C COMPOUND

Japanese Patent JP2006137749

A

To provide a method for decomposing ester oligomers (high boiling compounds) containing succinic acid and/or 4-hydroxybutyric acid and 1,4-butane diol as their constituting components, especially the high boiling compounds (the ester oligomers) produced as byproducts in the method for producing γ-butyrolactone, and further an industrially advantageous method for producing the group of 4C products, especially a method for producing the γ-butyrolactone.

This method for decomposing the ester oligomers is provided by bringing an aqueous solution of the ester oligomers containing succinic acid and/or 4-hydroxybutyric acid and 1,4-butane diol as their constituting components in contact with a solid acid catalyst under heating to decompose to each of their various constituting components, also converting 1,4-butane diol to tetrahydrofuran and/or converting the 4-hydroxy butyric acid to the γ-butyrolactone in the case of containing the 4-hydroxybutyric acid as the constituting component of the ester oligomers.

JP3773294	PRODUCTION OF DIALKYL CARBONATE AND DIOL
JP3958948	METHOD FOR PRODUCING RAW MATERIAL FOR POLYESTER

UTSUNOMIYA MASARU
MIZOGUCHI KATSUYOSHI
IWASAKA YOUJI

JP2005301040A

June 01, 2006

October 14, 2005

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MITSUBISHI CHEM CORP

C07C27/02; C07C31/20; C07C51/09; C07C55/10; C07C59/01; C07D307/08; C07D307/33; C07B61/00

JPS62111975A	1987-05-22
JPS6140278A	1986-02-26
JPS5293763A	1977-08-06
JPS5096561A	1975-07-31
JPH0753538A	1995-02-28

Hasegawa Soji

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