RO114982B1 - Process for recovering nickel from waste water and nickel-bearing sludges - Google Patents

Process for recovering nickel from waste water and nickel-bearing sludges

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Publication number
RO114982B1
RO114982B1 RO92-200139A RO92200139A RO114982B1 RO 114982 B1 RO114982 B1 RO 114982B1 RO 92200139 A RO92200139 A RO 92200139A RO 114982 B1 RO114982 B1 RO 114982B1
Authority
RO
Romania
Prior art keywords
nickel
waste water
sludges
solution
recovering
Prior art date
Application number
RO92-200139A
Other languages
Romanian (ro)
Inventor
Stela Popa
Romanita Teodorescu
Mihaela Ulmanu
Maria Antigona Suciu
Original Assignee
Institutul De Cercetare Si Proiectare Pentru Metale Neferoase Si Rare
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Institutul De Cercetare Si Proiectare Pentru Metale Neferoase Si Rare filed Critical Institutul De Cercetare Si Proiectare Pentru Metale Neferoase Si Rare
Priority to RO92-200139A priority Critical patent/RO114982B1/en
Publication of RO114982B1 publication Critical patent/RO114982B1/en

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  • Manufacture And Refinement Of Metals (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

Invenţia se referă la un procedeu de recuperare a nichelului din ape reziduale şi nămoluri nichelifere, constând, într-o primă fază, în spălarea nămolului nichelifer cu apă conţinând un adaos de 0,05...0,3% soluţie medasol, reprezentând o poliacril - amidă hidrolizată, drept floculant, după care, într-o fază următoare, suspensia separată prin filtrare este tratată cu acid azotic, sulfuric sau clorhidric, pentru solubilizarea nichelului, la pH=2,5...5,5 şi 70...85°C, după filtrarea impurităţilor şi concentrarea prin evaporare a soluţiei nichelifere reziduale, sarea de nichel obţinută fiind cristalizată prin răcire şi uscată, putând fi utilizată în circuitul industrial.The invention relates to a process for the recovery of nickel in wastewater and nicheliferous sludges, consisting in a first stage in the washing of the nickelliferous sludge with water containing an addition of 0.05 ... 0.3% medal solution, representing a hydrolyzed polyacrylamide as a flocculant, after which, in a subsequent step, the separated filtrate suspension is treated with nitric, sulfuric or hydrochloric acid to solubilize the nickel to pH = 2.5-5.5 and 70. .85 ° C, after filtration of the impurities and evaporation concentration of the residual nichelifer solution, the obtained nickel salt being crystallized by cooling and drying and can be used in the industrial circuit.

RO92-200139A 1992-02-13 1992-02-13 Process for recovering nickel from waste water and nickel-bearing sludges RO114982B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RO92-200139A RO114982B1 (en) 1992-02-13 1992-02-13 Process for recovering nickel from waste water and nickel-bearing sludges

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RO92-200139A RO114982B1 (en) 1992-02-13 1992-02-13 Process for recovering nickel from waste water and nickel-bearing sludges

Publications (1)

Publication Number Publication Date
RO114982B1 true RO114982B1 (en) 1999-09-30

Family

ID=64357669

Family Applications (1)

Application Number Title Priority Date Filing Date
RO92-200139A RO114982B1 (en) 1992-02-13 1992-02-13 Process for recovering nickel from waste water and nickel-bearing sludges

Country Status (1)

Country Link
RO (1) RO114982B1 (en)

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