Detail of "21035-59-6"

Reference

Water-insoluble chelate exchange resin

Water-insoluble chelate exchange resin. Grinstead, Robert R.; Nasutavicus, Wilmonte A. (Dow Chemical Co., USA). Ger. Offen. DE 2626623 20 Jan 1977, 26 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: B01J001-08. PRIORITY: US 75-587185 16 Jun 1975. DOCUMENT TYPE: Patent CA Section: 36 (Plastics Manufacture and Processing) Section cross-reference(s): 56 The title resins with high selectivity for Cu were prepd. 4377-33-7 and 62402-17-9 are cas registry numbers of chemicals which are used as reagents here. from chloromethyl derivs. of divinylbenzene-styrene copolymer (I) [9003-70-7] and 2-picolylamines. For example, 10 parts 50-100-mesh chloromethylated I (1.8% divinylbenzene, 19.2% Cl) was treated with 16.1 parts N-methyl-2-picolylamine [21035-59-6] in toluene to give a chelate exchange resin with dry exchange capacity 3.1 mequiv./g and a 10-fold greater selectivity for Cu than Fe. .

Water insoluble chelate exchange resins having a crosslinked polymer matrix and pendant thereto a plurality of methyleneaminopyridine groups

Water insoluble chelate exchange resins having a crosslinked polymer matrix and pendant thereto a plurality of methyleneaminopyridine groups. Grinstead, Robert R.; Nasutavicus, Wilmonte A. (Dow Chemical Co., USA). U.S. US 4031038 21 Jun 1977, 10 pp. (English). (United States of America). CODEN: USXXAM. CLASS: IC: B01D015-04. NCL: 260002200R. APPLICATION: US 75-587185 16 Jun 1975. DOCUMENT TYPE: Patent CA Section: 36 (Plastics Manufacture and Processing) Section cross-reference(s): 54 Chelate exchange resins contg. pendent methyleneaminopyridine groups, which are capable of selective recovery of Cu, Ni, and other metals from an acidic leach liquor, are prepd. by treating a crosslinked haloalkyl polymer matrix resin with an aminopyridine. Thus, a slurry of 10 parts acrylomethylated divinylbenzene-styrene copolymer [9003-70-7] beads was warmed 30 min in PhMe to swell the beads, and 16.1 parts N-methyl-2-picolylamine [21035-59-6] was added. The mixt. was refluxed 5 h and filtered through 20-mesh screen to yield the resin, which was slurried with 100 parts 1.2 N HCl. The resin had exchange capacity 0.74 mequiv./mL wet resin and water holding capacity 59%. A column contg. 12 mL resin hydrochloride in a 50 mL burette was treated with a simulated Cu leach soln. contg. 0.85 g/L Cu and 1.4 g/L Fe as sulfates with pH 1. 63671-70-5 is also in the experiment.7 at 1.8 mL/min; the effluent Cu concn. did not reach 50% of the feed level until after 12 bed vols. had passed through the resin column, but the Fe breakthrough occurred after only a few bed vols. After passage of .apprx.25 bed vols., the column was washed with H2O and eluted with 1 N H2SO4. Anal. of the eluate indicated a resin loading of 10 and 2 mg/mL of resin bed for Cu and Fe, resp., a Cu-Fe ratio .apprx.10-fold greater than that of the feed liquor. In a similar run with a com. iminodiacetic acid chelate resin (Dowex A-1), the loading was 5 and 9 mg/mL for Cu and Fe, resp. .