Production process and purification process of 4-hydroxy-benzoic acid long chain ester
AssigneeUeno Fine Chemicals Industry, Ltd.
InventorsYusuke Kita, Toshihide Komatsu, Takaya Hisano, Kuniyo Yanagawase, Mio Tsuchiya
Life of this patent
Estimating the term…
Abstract
The present invention relates to a production process of a 4-hydroxy-benzoic acid long chain ester, that includes a step of reacting a 4-hydroxy-benzoic acid short chain ester with an aliphatic alcohol in the presence of a metal catalyst. The present invention also relates to a purification process of a 4-hydroxy-benzoic acid long chain ester, that includes a step of adding an acid aqueous solution to a crude composition including the 4-hydroxy-benzoic acid long chain ester, separating the crude composition to an organic phase and a water phase and extracting the organic phase.
Claims24
A production process of a 4-hydroxy-benzoic acid long chain ester represented by formula (3), comprising
- a step of reacting a 4-hydroxy-benzoic acid short chain ester represented by formula (1) with an aliphatic alcohol represented by formula (2) in the presence of a metal catalyst to obtain a crude composition containing the 4-hydroxy-benzoic acid long chain ester represented by formula (3),
- wherein
- “m” represents an integer from 1 to 11 and “n” represents an integer from 15 to 23, and
- a step of adding an acid aqueous solution to the crude composition, separating the crude composition to an organic phase and a water phase and extracting the organic phase.
A purification process of a 4-hydroxy-benzoic acid long chain ester, comprising
- a step of adding an acid aqueous solution to a crude composition containing the 4-hydroxy-benzoic acid long chain ester represented by formula (3), separating the crude composition to an organic phase and a water phase and extracting the organic phase,
- wherein
- “n” represents an integer from 15 to 23.
Dependencies are inferred from the claim text.