Removal of corrodants from nmp solvent by contacting with...

Details Removal of corrodants from nmp solvent by contacting with... Removal of corrodants from nmp solvent by contacting with...

C - Chemistry, Metallurgy

10

G

204/88

C10G 29/04 (2006.01) C10G 1/04 (2006.01)

Patent

CA 1258044

ABSTRACT OF THE DISCLOSURE Corrosion of the process equipment in solvent extraction units utilizing N methyl-2-pyrrolidone as the selective extraction solvent is significantly reduced by means of a sacrificial metal contacting zone or bed containing a metal or metal alloy with a higher electro chemical potential than the metals used in the extraction unit vessels and lines. Preferred sacrificial metals are magnesium, zinc, calcium, barium, and strontium, most preferably magnesium, as metal strips, shavings, ribbons, sponge, filings, chips, blocks, bricks, etc.

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