Prevention of color development of aromatic compound having hydroxyl group

Abstract

Abstract PURPOSE: To maintain the quality of a substance having a hydroxyl group and liable to color during storage, e.g. β-naphthol, and to prevent the color developement of the substance, by keeping the substance in a closed vessel containing an oxygen acceptor such as active iron oxide preventing direct contact of both contents. CONSTITUTION: The color development of an aromatic compound having a hydroxyl group and liable to develop color with time (e.g. catechol, resorcinol, hydroquinone, phenol, naphthol, etc.) can be prevented by storing the compound in a closed vessel (keeping from the outer atmosphere) containing a substance capable of absorbing oxygen (e.g. active iron, a mixture of a dithionous acid salt and a hydrous alkaline earth metal) preventing the direct contact of both contents (e.g. placing the oxygen-absorbing substance in a breathable bag or box placed in the empty space of the vessel). EFFECT: A sufficient effect can be attained by the use of only a small amount of the oxygen-absorbing substance. The purity of the product can be maintained at a high level because there is not contamination of the product with the oxygen-absorbing substance. COPYRIGHT: (C)1981,JPO&Japio

Inventors

• 👤 Naoyuki Yano
• 👤 Tadashi Matsufuji
• 👤 Shuichi Sako

Bibliographic Details