Recycle treatment of waste water from nickel plating

Details Recycle treatment of waste water from nickel plating Recycle treatment of waste water from nickel plating

1975-09-15

1977-02-22

Hart, Charles N.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210 32, 210 38B, 210 45, 210 60, 75101BE, 75119, 423139, 423145, B01D 1504

Patent

active

040091015

ABSTRACT:
A method for the recycle treatment of nickel plating waste water, in order to efficiently recover the nickel components from waste water which has been used for the washing of nickel plated products in a form re-usable as a nickel plating solution as such, wherein the nickel plating waste water is mixed with an aqueous alkaline component so as to remove, by precipitation in the form of hydroxides, contaminating metal ions other than nickel; the filtrate so obtained is treated through an ion exchange process so as to obtain an aqueous solution of nickel salts containing excess free sulfuric acid, a portion of which is then treated with alkali so as to precipitate nickel hydroxide which is separated in the form of nickel hydroxide through filtration by means of a centrifuge; the nickel hydroxide so obtained is then added to the rest of the aqueous nickel salt solution for neutralization with the free sulfuric acid contained therein to form nickel sulfate; and the free sulfuric acid is then removed so as to obtain a highly concentrated nickel sulfate solution.

REFERENCES:
patent: 3342730 (1967-09-01), Mihara et al.
patent: 3493498 (1970-02-01), Abrams et al.
patent: 3575854 (1971-04-01), Richards
patent: 3630892 (1971-12-01), Hirs et al.
patent: 3658470 (1972-04-01), Zievers et al.
patent: 3725259 (1973-04-01), De Pree
patent: 3800024 (1974-03-01), Forsell et al.

Affiliated with

Also associated with

Rating

Recycle treatment of waste water from nickel plating does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Recycle treatment of waste water from nickel plating, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Recycle treatment of waste water from nickel plating will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-323116