Nickel hydroxide recovery from stainless steel pickling liquors by selective precipitation

Jorge Hermoso; Javier Dufour; José Luis Gálvez; Carlos Negro; Federico López-Mateos

doi:10.1021/ie050422n

Nickel hydroxide recovery from stainless steel pickling liquors by selective precipitation

Jorge Hermoso
, Javier Dufour^*
, José Luis Gálvez
, Carlos Negro
, Federico López-Mateos

^*Corresponding author for this work

Complutense University
Universidad Rey Juan Carlos

Research output: Contribution to journal › Article › peer-review

26 Citations (Scopus)

Abstract

Stainless steel pickling liquor is obtained when a steel surface is treated with hydrofluoric and nitric acid mixtures. Industrial treatments of this dangerous and toxic effluent are focused on acid recovery, while metals are considered as a waste to be managed. Thus, a process taking into account the need to recover valuable metals is under development. This work presents the optimization of the first precipitaiton stage of this new process, with the aim of separating metals (iron and chromium) as fluorides by crystallization, keeping nickel in solution. Experimental conditions that lead to the best yield of reaction were 60-65 °C, pH 4.1-4.2, and free fluoride from 14 to 15% of alkali stream as potassium fluoride. Crystals obtained are mainly hydrated K₂FeF₅ and CrF₃, with a little fraction of other oxides and fluorides phases. The entire content of nickel remaining in solution precipitates as Ni(OH)₂ in another stage.

Original language	English
Pages (from-to)	5750-5756
Number of pages	7
Journal	Industrial and Engineering Chemistry Research
Volume	44
Issue number	15
DOIs	https://doi.org/10.1021/ie050422n
Publication status	Published - 20 Jul 2005
Externally published	Yes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 6 Clean Water and Sanitation

Access to Document

10.1021/ie050422n

Cite this

@article{477b5f1ae60f4b4790134f98fc606c19,

title = "Nickel hydroxide recovery from stainless steel pickling liquors by selective precipitation",

abstract = "Stainless steel pickling liquor is obtained when a steel surface is treated with hydrofluoric and nitric acid mixtures. Industrial treatments of this dangerous and toxic effluent are focused on acid recovery, while metals are considered as a waste to be managed. Thus, a process taking into account the need to recover valuable metals is under development. This work presents the optimization of the first precipitaiton stage of this new process, with the aim of separating metals (iron and chromium) as fluorides by crystallization, keeping nickel in solution. Experimental conditions that lead to the best yield of reaction were 60-65 °C, pH 4.1-4.2, and free fluoride from 14 to 15\% of alkali stream as potassium fluoride. Crystals obtained are mainly hydrated K2FeF5 and CrF3, with a little fraction of other oxides and fluorides phases. The entire content of nickel remaining in solution precipitates as Ni(OH)2 in another stage.",

author = "Jorge Hermoso and Javier Dufour and G{\'a}lvez, \{Jos{\'e} Luis\} and Carlos Negro and Federico L{\'o}pez-Mateos",

year = "2005",

month = jul,

day = "20",

doi = "10.1021/ie050422n",

language = "English",

volume = "44",

pages = "5750--5756",

journal = "Industrial and Engineering Chemistry Research",

issn = "0888-5885",

number = "15",

}

TY - JOUR

T1 - Nickel hydroxide recovery from stainless steel pickling liquors by selective precipitation

AU - Hermoso, Jorge

AU - Dufour, Javier

AU - Gálvez, José Luis

AU - Negro, Carlos

AU - López-Mateos, Federico

PY - 2005/7/20

Y1 - 2005/7/20

N2 - Stainless steel pickling liquor is obtained when a steel surface is treated with hydrofluoric and nitric acid mixtures. Industrial treatments of this dangerous and toxic effluent are focused on acid recovery, while metals are considered as a waste to be managed. Thus, a process taking into account the need to recover valuable metals is under development. This work presents the optimization of the first precipitaiton stage of this new process, with the aim of separating metals (iron and chromium) as fluorides by crystallization, keeping nickel in solution. Experimental conditions that lead to the best yield of reaction were 60-65 °C, pH 4.1-4.2, and free fluoride from 14 to 15% of alkali stream as potassium fluoride. Crystals obtained are mainly hydrated K2FeF5 and CrF3, with a little fraction of other oxides and fluorides phases. The entire content of nickel remaining in solution precipitates as Ni(OH)2 in another stage.

AB - Stainless steel pickling liquor is obtained when a steel surface is treated with hydrofluoric and nitric acid mixtures. Industrial treatments of this dangerous and toxic effluent are focused on acid recovery, while metals are considered as a waste to be managed. Thus, a process taking into account the need to recover valuable metals is under development. This work presents the optimization of the first precipitaiton stage of this new process, with the aim of separating metals (iron and chromium) as fluorides by crystallization, keeping nickel in solution. Experimental conditions that lead to the best yield of reaction were 60-65 °C, pH 4.1-4.2, and free fluoride from 14 to 15% of alkali stream as potassium fluoride. Crystals obtained are mainly hydrated K2FeF5 and CrF3, with a little fraction of other oxides and fluorides phases. The entire content of nickel remaining in solution precipitates as Ni(OH)2 in another stage.

UR - https://www.scopus.com/pages/publications/22944452402

U2 - 10.1021/ie050422n

DO - 10.1021/ie050422n

M3 - Article

AN - SCOPUS:22944452402

SN - 0888-5885

VL - 44

SP - 5750

EP - 5756

JO - Industrial and Engineering Chemistry Research

JF - Industrial and Engineering Chemistry Research

IS - 15

ER -

Nickel hydroxide recovery from stainless steel pickling liquors by selective precipitation

Abstract

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this