C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 65/11 (2006.01) C07C 51/47 (2006.01)
Patent
CA 2255621
A process for separating and purifying alkali metal salts of hydroxynaphthalenecarboxylic acids, wherein a mixture of alkali metal salts of hydroxynaphthalenecarboxylic acids is treated with a nonionic porous synthetic adsorbent in water or both water and a water-soluble organic solvent.
Procédé servant à séparer et à purifier des sels de métaux alcalins d'acides hydroxynaphtalènecarboxyliques, ce qui consiste à traiter un mélange de sels de métaux alcalins d'acides hydroxynaphtalènecarboxyliques avec un adsorbant synthétique poreux non ionique, dans de l'eau ou, à la fois, dans de l'eau et dans un solvant organique soluble dans l'eau.
Kitayama Masaya
Mori Shigeji
Uchiyama Yoshiro
Ueno Ryuzo
Yanagawase Kuniyo
Kabushiki Kaisha Ueno Seiyaku Oyo Kenkyujo
Kirby Eades Gale Baker
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