PSI WP-2 Ion Exchange Resin

PRIMARY APPLICATION: Nickel Recovery from Acidic Liquors

WP-2® is a non-styrene ion exchange resin containing an iminoacetic acid functional group that may be used to selectively recover high purity nickel from complex leach liquors found in mining and industrial waste treatment. The resin has been formulated so that metal recovery takes place by ion exchange mechanisms, molecular size and geometry affinity, and reversible chemical reactions.
SELECTIVITY
  • Dependent on pH of pregnant liquor: At pH < 3.3 WP-2® co-loads ferric iron (rejects ferrous iron), copper, nickel & cobalt
  • At pH > 3.3 the resin will begin to co-load aluminium, lead, zinc, manganese and cadmium.
  • Designed to reject sodium, calcium, magnesium and potassium where pH < 9.
  • During the resin loading stage a number of metals co-load and are then displaced by metals with stronger binding affinities. For example, nickel will displace cobalt and copper will displace nickel.
RECOVERY
  • WP-2® is being used to recover high purity nickel from complex feed solutions including heap leach solutions containing high magnesium and aluminum.
  • Most complex feed solutions contain a variety of metals along with the target metal nickel. These contaminating metals usually include iron along with metals dissolved in the leach process.
  • The WP-2® technology relies on the resin’s ability to reject virtually all of the ferrous iron present. Provided the pregnant liquor stream contains only ferrous iron, has all copper removed, and the PLS pH is < 3 (pH 2 optimum), it is probable that a high purity nickel elute product can be obtained cost effectively.

KEY PRODUCT FEATURES
  • Non styrene resin
  • Cycles are load, wash, elute, rinse
  • Typical 1 hour cycle time for Carousel, 2 hours for Fixed Bed
  • Loads Co, Ni, Fe3+, Cu at pH<3, rejects Fe2+, Ca, Mg, Na, K
  • Ni and Co elute products typically >99% if iron present as Fe2+
  • At pH>3.5 will load Al, Cd, Cr, Pb, Mn, V, Zn, Zr
  • May be eluted with concentrated H2SO4, HNO3, HCl, NH3
  • Two particle sizes: 350 - 650 micron and 180 - 250 micron
  • Long resin life with <10% loss in loading capacity after 10,000 cycles
  • Zero shrink or swell
  • Process temperatures to 110C
  • Not suitable for use with HF & NaOH > 1M

LINKS

MSDS
USA 
Aust

Product Data Sheet
WP-2
Bench Test with WP-2
Bench Test with WP-2 Industrial Waste Stream sample being tested at MonTEC Labs.
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