Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1978-09-11
1981-05-05
Lee, Lester L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
210688, 525 32, 525 35, 525391, 525396, 525397, 525480, 525504, 525505, 525506, 525508, 528162, 528163, 528164, 528212, C08G 810, C08G 828, C08G 832
Patent
active
042660459
ABSTRACT:
An etherified phenolic chelate resin prepared by stabilizing and protecting the chelate groups of a phenolic chelate resin and then converting some or all of the phenolic hydroxyl groups into ether groups; a process for the production of the etherified phenolic chelate resin; and a method for separating a heavy metal ion from an aqueous solution having a pH of at least 7 by using this etherified phenolic chelate resin.
REFERENCES:
patent: 2259503 (1941-10-01), Wassenegger et al.
patent: 3936399 (1976-02-01), Hirai et al.
patent: 4028284 (1977-06-01), Hirai et al.
Hirai Masahide
Sakaida Tsutomu
Uejima Hiroyuki
Lee Lester L.
Unitika Ltd.
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