hydrogen reduction of nickel in autoclave

Nickel production Harjavalta Production process

Nickel production Harjavalta Production process

The reduction plant''s end product is nickel briquettes. The purified nickel solution then goes through hydrogen reduction in batches. This is achieved by using hydrogen gas under suitable conditions in the autoclaves. Nickel powder generated in the autoclaves is

Production of cobalt and nickel powder AMAX Inc.

Production of cobalt and nickel powder AMAX Inc.

Aug 02, 1988 · Fine cobalt or nickel powder is produced by hydrogen reduction of a sulfate solution in the presence of a base and a strong reductant such as a metal borohydride wherein the base is added stagewise to the solution with the initial addition of base being sufficient to insure an essentially neutral pH at the time of reductant addition.

Hydrogenation in Practice

Hydrogenation in Practice

The autoclave has to ensure that the hydrogen is dissolved efficiently into the oil. The conventional type of autoclave is a stirred tank, in which the hydrogen is introduced through a sparger ring at the bottom of the tank (see figure 1). The hydrogen bubbles are dispersed into tiny bubbles by means of a central vertical agitator device.

Producing Copper Powder from Copper Bleed Solution by

Producing Copper Powder from Copper Bleed Solution by

copper powder. A titaniumlined autoclave of 1 L capacity was used for this study. After the optimization of the parameters for the recovery of copper powder, hydrogen reduction of copper was done in a larger autoclave to validate the results. processed for the recovery of nickel powder by hydrogen reduction.

Nickel supported on nitrogendoped carbon nanotubes as

Nickel supported on nitrogendoped carbon nanotubes as

The hydrogen fuel cells are based on two halfcell reactions: hydrogen oxidation reaction (HOR) at the anode and oxygen reduction reaction (ORR) at the hode. To date, Pt is the most active alyst for both HOR and ORR 4. However, the commercialization

hydrogen reduction of nickel in autoclave pdf

hydrogen reduction of nickel in autoclave pdf

Method for the reduction of nickel from an aqueous Mar 30, 2004· What is claimed is: 1. A method of the reduction of nickel powder suitable as a component of refined steel, comprising reducing an aqueous solution containing nickel sulphate in a pressurised space using hydrogen as the reducing agent, the reduction occurring continuously at a temperature between 110160° C. and at a

Murrin Murrin NickelCobalt Mine Wikimapia

Murrin Murrin NickelCobalt Mine Wikimapia

The Murrin Murrin nickelcobalt project, 60km east of Leonora, was commissioned by Anaconda Nickel Ltd. The project is now a joint venture between Murrin Murrin Holdings Pty Ltd, a wholly owned subsidiary of Minara Resources Ltd (60%), and Glenmurrin Pty Ltd, a wholly owned subsidiary of Glencore International AG (40%). It is based on the mining and processing of lateritic ore for the

Hydrogenation in Practice

Hydrogenation in Practice

The autoclave has to ensure that the hydrogen is dissolved efficiently into the oil. The conventional type of autoclave is a stirred tank, in which the hydrogen is introduced through a sparger ring at the bottom of the tank (see figure 1). The hydrogen bubbles are dispersed into tiny bubbles by means of a central vertical agitator device.

US4758266A Production of high surface area nickel powder

US4758266A Production of high surface area nickel powder

Nickel powder of high surface area is produced by pressurized hydrogen reduction of an ammoniacal aqueous nickel sulfate solution using a small amount of a alytic reductant compound exemplified by formaldehyde sulfoxalate (rongalite).

2017 – Kwinana Nickel Refinery – Nickel Reduction Autoclaves

2017 – Kwinana Nickel Refinery – Nickel Reduction Autoclaves

Access Petrotec took up the challenge and delivered the fabried and tested Autoclave in a record time of 5 months to BHP Billiton''s nominated freight forwarder in India. Later an additional Autoclave was added to the order for the expansion of their Kwinana Nickel Refinery.

Autoclaves and agitators. Free Online Library

Autoclaves and agitators. Free Online Library

A major potential problem in nickel reduction autoclaves is axial impeller interference. The classic case is when two axial impellers are pumping in the same direction and are separated by about one impeller diameter. This can easily occur in a nickel autoclave with

Nanoscale nickel oxide/nickel heterostructures for active

Nanoscale nickel oxide/nickel heterostructures for active

Aug 22, 2014 · Active, stable and costeffective electroalysts are a key to water splitting for hydrogen production through electrolysis or photoelectrochemistry. Here we report nanoscale nickel oxide/nickel

Minerals Free FullText A Novel EcoFriendly Vanadium

Minerals Free FullText A Novel EcoFriendly Vanadium

In recent years, the method of hydrothermal hydrogen reduction has been developed for precipitating metal powders such as Ag, Ni, Cu, etc. from their highvalence metal ion solutions or slurries [24,25,26,27].Through using the reduction ability of the green gas of hydrogen, the method is carried out in suitable equipment under controlled conditions of pH, temperature and H 2 partial pressure

Minerals Free FullText A Novel EcoFriendly Vanadium

Minerals Free FullText A Novel EcoFriendly Vanadium

In recent years, the method of hydrothermal hydrogen reduction has been developed for precipitating metal powders such as Ag, Ni, Cu, etc. from their highvalence metal ion solutions or slurries [24,25,26,27].Through using the reduction ability of the green gas of hydrogen, the method is carried out in suitable equipment under controlled conditions of pH, temperature and H 2 partial pressure

US4758266A Production of high surface area nickel powder

US4758266A Production of high surface area nickel powder

Nickel powder of high surface area is produced by pressurized hydrogen reduction of an ammoniacal aqueous nickel sulfate solution using a small amount of a alytic reductant compound exemplified by formaldehyde sulfoxalate (rongalite).

HPAL Process — Precision Valve Engineering

HPAL Process — Precision Valve Engineering

The remaining nickel solution feeds the nickel hydrogen reduction area. The metal sulphate solutions are hydrogenreduced in parallel autoclaves. The resulting powders are dewatered, dried and packaged for sale. Other SchuF valves used by the mining industry include Ram Valves for various injection,

Direct synthesis of nickel powders from NiO  DeepDyve

Direct synthesis of nickel powders from NiO DeepDyve

Apr 01, 2010 · Read "Direct synthesis of nickel powders from NiO slurry by hydrothermal hydrogen reduction process, Hydrometallurgy" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publiions available at your fingertips.

How Sherritt Refines Nickel

How Sherritt Refines Nickel

The reduction of nickel occurs as a batch operation in the reduction autoclaves. Here an autoclave is filled with the purified solution and a small amount of nickel powder. Hydrogen is added under pressure and the nickel precipitates from solution, depositing on the nickel powder. The autoclave is agitated to keep the nickel in suspension.

A review of the precipitation of nickel from salt

A review of the precipitation of nickel from salt

ELSEVIER Hydrometallurgy 47 (1998) 309324 hydrometallurgy A review of the precipitation of nickel from salt solutions by hydrogen reduction Thomas Saarinen a, LarsEric Lindfors a,*, Sigmund Fugleberg b a ~borator3, of Industrial Chemistry, Abo Akademi Uniuersiiy, FIN20500 Turku, Finland b Outokumpu Research Oy, FIN28101 Pori, Finland Received 26 January 1996 accepted 31 August

Nickel: Chemical reactions Pilgaard Elements

Nickel: Chemical reactions Pilgaard Elements

Nickel metal dissolves slowly in dilute sulphuric acid to form the aquated Ni(II) ion and hydrogen, H 2.In aqueous solution, Ni(II) is present as the complex ion [Ni(H 2 O) 6] 2+. Ni (s) + H 2 SO 4 (aq) Ni 2+ (aq) + SO 4 2− (aq) + H 2 (g) The strongly oxidizing concentrated nitric acid, HNO 3, reacts on the surface of iron and passivates the surface.

HPAL Process — Precision Valve Engineering

HPAL Process — Precision Valve Engineering

The remaining nickel solution feeds the nickel hydrogen reduction area. The metal sulphate solutions are hydrogenreduced in parallel autoclaves. The resulting powders are dewatered, dried and packaged for sale. Other SchuF valves used by the mining industry include Ram Valves for various injection,

Reduction of nickel oxide particles by hydrogen studied in

Reduction of nickel oxide particles by hydrogen studied in

In situ reduction of nickel oxide (NiO) particles is performed under 1.3 mbar of hydrogen gas (H 2) in an environmental transmission electron microscope (ETEM). Images, diffraction patterns and electron energyloss spectra (EELS) are acquired to monitor the structural and chemical evolution of the system during reduction, whilst

Synthesis of FeNi3 Alloyed Nanoparticles by Hydrothermal

Synthesis of FeNi3 Alloyed Nanoparticles by Hydrothermal

reduction of two metal salts under high temperature and high pressure, conditions under which aqueous solutions exhibit a critical or supercritical state.13 In the present work, we describe a facile hydrothermal method to synthesize stoichiometric FeNi3 alloy nanoparticles by reducing iron and nickel salts with hydrazine hydrate in strong

Method for the reduction of nickel from an aqueous

Method for the reduction of nickel from an aqueous

Mar 30, 2004 · What is claimed is: 1. A method of the reduction of nickel powder suitable as a component of refined steel, comprising reducing an aqueous solution containing nickel sulphate in a pressurised space using hydrogen as the reducing agent, the reduction occurring continuously at a temperature between 110160° C. and at a hydrogen pressure between 210 bar in at least one autoclave

Hydrogen Reduction an overview ScienceDirect Topics

Hydrogen Reduction an overview ScienceDirect Topics

The liquor from hydrogen reduction contains residual nickel, cobalt, and zinc. These metal ions are precipitated using hydrogen sulfide and recovered as sulfide precipitates. The common precipitation reaction can be written: forming in the autoclave at a concentration of 5 g/L. The hydrogen reduction process is carried out at 550 K, and at

US3989509A Catalytic hydrogen reduction of metals from

US3989509A Catalytic hydrogen reduction of metals from

An improved method is provided for efficiently precipitating metal powder selected from the group consisting of nickel, cobalt and copper from aqueous solutions using sulfurfree hydrogen at elevated pressure and temperature, the improvement residing in adding to the solution a small but effective amount of a alyst as an antiplating agent, said alyst comprising an alkali metal or

Hydrogenation in Practice

Hydrogenation in Practice

The autoclave has to ensure that the hydrogen is dissolved efficiently into the oil. The conventional type of autoclave is a stirred tank, in which the hydrogen is introduced through a sparger ring at the bottom of the tank (see figure 1). The hydrogen bubbles are dispersed into tiny bubbles by means of a central vertical agitator device.

A History of Sherritt – Fifty Years of Pressure

A History of Sherritt – Fifty Years of Pressure

Jan 14, 2009 · While nickel reduction has been practiced commercially for over 50 years, it remains a unit operation where operating practice is considerably lower than theoretical optimum. The actual amount of operating time nickel reduction autoclaves spend chemically reducing nickel from solution is only 30 to 50% (10).

Nickel: Chemical reactions Pilgaard Elements

Nickel: Chemical reactions Pilgaard Elements

Nickel metal dissolves slowly in dilute sulphuric acid to form the aquated Ni(II) ion and hydrogen, H 2.In aqueous solution, Ni(II) is present as the complex ion [Ni(H 2 O) 6] 2+. Ni (s) + H 2 SO 4 (aq) Ni 2+ (aq) + SO 4 2− (aq) + H 2 (g) The strongly oxidizing concentrated nitric acid, HNO 3, reacts on the surface of iron and passivates the surface.

A History of Sherritt – Fifty Years of Pressure

A History of Sherritt – Fifty Years of Pressure

Jan 14, 2009 · While nickel reduction has been practiced commercially for over 50 years, it remains a unit operation where operating practice is considerably lower than theoretical optimum. The actual amount of operating time nickel reduction autoclaves spend chemically reducing nickel from solution is only 30 to 50% (10).

The Precipitation Kinetics of Nickel Powder Produced by

The Precipitation Kinetics of Nickel Powder Produced by

Abstract The active particulate processes in the precipitation of nickel powder by hydrogen reduction were investigated on an industrial scale by analyzing the evolution of the particle size distribution (PSD) and its derived moments.

Reduction using Catalytic hydrogenation

Reduction using Catalytic hydrogenation

easily and is generally faster than reduction of alkenes or carbonyl groups. Raney nickel or any of the platinum metals can be used as the alyst, and the choice is governed by the nature of other functional groups in the molecule. H 2,5 % Pd/C EtOH,H 2 SO 4 Nitriles are reduced with hydrogen and platinum or palladium at room

Method for the reduction of nickel from an aqueous

Method for the reduction of nickel from an aqueous

Mar 30, 2004 · What is claimed is: 1. A method of the reduction of nickel powder suitable as a component of refined steel, comprising reducing an aqueous solution containing nickel sulphate in a pressurised space using hydrogen as the reducing agent, the reduction occurring continuously at a temperature between 110160° C. and at a hydrogen pressure between 210 bar in at least one autoclave

Autoclaves and agitators. Free Online Library

Autoclaves and agitators. Free Online Library

A major potential problem in nickel reduction autoclaves is axial impeller interference. The classic case is when two axial impellers are pumping in the same direction and are separated by about one impeller diameter. This can easily occur in a nickel autoclave with

The Precipitation Kinetics of Nickel Powder Produced by

The Precipitation Kinetics of Nickel Powder Produced by

The active particulate processes in the precipitation of nickel powder by hydrogen reduction were investigated on an industrial scale by analyzing the evolution of the particle size distribution (PSD) and its derived moments. Based on this information, an appropriate model based on the moment form of the population balance equation (PBE) was tested. Nickel powder samples were collected from

Direct synthesis of nickel powders from NiO  DeepDyve

Direct synthesis of nickel powders from NiO DeepDyve

Apr 01, 2010 · Read "Direct synthesis of nickel powders from NiO slurry by hydrothermal hydrogen reduction process, Hydrometallurgy" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publiions available at your fingertips.

Nickelmolybdenum nitride nanoplate electroalysts for

Nickelmolybdenum nitride nanoplate electroalysts for

Nov 25, 2019 · Here we report the nickelmolybdenumnitride nanoplates loaded on carbon fiber cloth (NiMoN/CFC), for the concurrent electrolytic productions of highpurity hydrogen at

(PDF) The Precipitation Kinetics of Nickel Powder Produced

(PDF) The Precipitation Kinetics of Nickel Powder Produced

Metallic nickel and other metals are industrially produced by the reduction of nickel diamine sulphate by hydrogen under pressure at elevated temperatures in mechanically agitated autoclaves.

A comprehensive review on the hydro  eprints@NML

A comprehensive review on the hydro [email protected]

Agrawal, A and Kumar, Vinay and Pandey, B D and Sahu, K K (2006) A comprehensive review on the hydro metallurgical process for the production of nickel and copper powders by hydrogen reduction. Materials Research Bulletin, 41 (4). pp. 879892.

Hydrogen as a reducing agent: Stateoftheart science and

Hydrogen as a reducing agent: Stateoftheart science and

In principle, hydrogen can be applied as a reducing agent for the production of many metals. It has found commercial appliion for the synthesis of platinum group metals, some rare metals such as germanium and rhenium, and for the production of special grades of metals (e.g., fine nickel and cobalt powders) However, hydrogen is primarily applied for the synthesis of tungsten and molybdenum

US3989509A Catalytic hydrogen reduction of metals from

US3989509A Catalytic hydrogen reduction of metals from

An improved method is provided for efficiently precipitating metal powder selected from the group consisting of nickel, cobalt and copper from aqueous solutions using sulfurfree hydrogen at elevated pressure and temperature, the improvement residing in adding to the solution a small but effective amount of a alyst as an antiplating agent, said alyst comprising an alkali metal or

Production of cobalt and nickel powder AMAX Inc.

Production of cobalt and nickel powder AMAX Inc.

Aug 02, 1988 · Fine cobalt or nickel powder is produced by hydrogen reduction of a sulfate solution in the presence of a base and a strong reductant such as a metal borohydride wherein the base is added stagewise to the solution with the initial addition of base being sufficient to insure an essentially neutral pH at the time of reductant addition.

The Reduction of Nickel Oxide by Hydrogen Journal of the

The Reduction of Nickel Oxide by Hydrogen Journal of the

KINETICS OF REDUCTION OF NICKEL OXIDE WITH HYDROGEN GAS IN THE 230452°C RANGE. Chemical Engineering Communiions 1997, 156 (1), 130. DOI: 10.1080/00986449708936666. Katsuhiko TAKAHASHI, Minoru ASADA, Masahiro KAWAKAMI. Effects of MgO Content and Temperature on the Reduction Rate of NiOMgO Solid Solution by Hydrogen.

Hydrogen as a reducing agent: Stateoftheart science and

Hydrogen as a reducing agent: Stateoftheart science and

In principle, hydrogen can be applied as a reducing agent for the production of many metals. It has found commercial appliion for the synthesis of platinum group metals, some rare metals such as germanium and rhenium, and for the production of special grades of metals (e.g., fine nickel and cobalt powders) However, hydrogen is primarily applied for the synthesis of tungsten and molybdenum

Design and Materials Selection of Autoclaves and Auxiliary

Design and Materials Selection of Autoclaves and Auxiliary

Over the past 50 years, the use of autoclaves in the metallurgical industry has evolved from final metal recovery (hydrogen reduction) and purifiion (sulphide precipitate oxidation) to treating whole ores and concentrates. Recent process developments, such as the use of autoclaves for laterite leaching, have necessitated

OutOtec HydrOmetallurgical Nickel PlaNts aNd PrOcesses

OutOtec HydrOmetallurgical Nickel PlaNts aNd PrOcesses

produced by using hydrogen reduction technology. The new Outotec anode bag technology in nickel electrowinning offers an environmentally friendly electrowinning process by significantly reducing nickel emissions and notably improving the working hygiene of operators. This new technology reduces operating costs and enables fully