US7736607B2 - Process for metals recovery from spent catalyst ...

The catalyst is roasted to remove carbonaceous and sulfurous residues then metals are leached simultaneously from spent catalyst. ... 4,514,369 discloses leaching spent supported catalysts, to obtain a liquor containing cobalt, nickel, molybdenum and vanadium. .... Any needed make-up solution is added at this point.

Selective extraction of molybdenum and vanadium from spent ...

Spent hydrodesulfurization catalysts containing alumina, at least one metal from the group consisting of molybdenum, tungsten and vanadium and at least one metal from the ... The digested solids contain essentially all the nickel and cobalt present in the original catalyst and may be worked up for recovery of these metals.

Recovery of molybdenum from spent hydro-refining catalysts by ...

to extract about 81% of molybdenum with temperature 500oC, soda ash 20wt% when roasted for 20 minutes. ... oxide, from the spent hydro-refining catalyst, under the optimum condition of reaction temperature 575oC ... The pyro-metlalurgical routes are mainly implemented for the very low grade concentrate where.

UP-GRADATION OF MoO3 AND SEPARATION OF COPPER, IRON ...

Product 90 - 95 ... The main target of the present study is the up-gradation of MoO3 from roasted molybdenum ore by a leaching process without waste generation. ... denite concentrate, which is the first commercial product. To generate MoS2 ... molybdenum from spent catalysts by metallurgical processing (Zeng and Cheng,...

Up-gradation of MoO3 and separation of copper, iron, zinc from ...

Product 90 - 95 ... The soda ash roasting process is another methodology developed and reported for a secondary source of molybdenum (Kar et al., 2004). At low temperatures (200-450 ºC), the method established for the leaching process for spent Co-Mo/Al2O3 catalyst was sulfuric acid baking (Kim et al., 2009).

Material and Energy Flows Associated with Select Metals in GREET ...

Life-cycle analysis has been effectively used in many fields to quantify the environmental impacts of products and processes. Argonne National Laboratory's GREET model (Greenhouse. Gases, Regulated Emissions, and Energy Use in Transportation), was originally developed to evaluate fuel-cycle (or well-to-wheels)...

About us - Chengdu Molyplus

Based on its own molybdenum ores and reliable source for Mo-bearing spent catalysts, Molyplus has grown and prospered and now is the greatest manufacturer and ... Its subsidiary, Molyplus (HK) Ltd., plays a supplementary role by sourcing Roasted Molybdenum Concentrates from domestic and oversea market to meet...

RECOVERY OF MOLYBDENUM AND COBALT POWDERS FROM ...

The latter increased with the increase in acid concentration, time up to 3 hours and temperature: IOO°C ... oxide states of molybdenum and cobalt are formed by roasting in atmospheric oxygen. Reduction with ... of Mo and vanadium was effected by roasting the spent catalyst with sodium carbonate) 12.13). Hubred (14) used...

WO2012065191A2 - Method for recovering molybdenum, vanadium ...

No. 3,773,890 of Fox et al. disclose a process for utilizing spent hydroprocessing catalysts for metal recovery where the catalysts were roasted with sodium chloride, which converts vanadium and molybdenum to a water soluble form. After water leaching, the vanadium and molybdenum solution is separated and the residue...

alkali process to removal of vanadium and molybdenum from spent ...

NaOH aqueous solutions, concentrated and diluted, at. 23.8 atmwere used as a leaching agent to extract V from catalysts. In the study published by Chen Y. & al (2006), extraction of molybdenum and vanadium from ammonia leaching residue of spent catalyst was investigated, by roasting the residue with soda carbonate...

moxba-metrex metal residue management

Moxba-Metrex is a Dutch company, specialized in the responsible and environmentally friendly processing of spent catalyst and metal-containing ... arc. Roasted material. Metal oxides,. Concentrates &. Alloys. Gas cleaning. Magnesium sulphate. Moxba-Metrex B.V.. T: +31 546 577 400. F: +31 546 577 600. E: [email protected]

Molybdenum - Indian Bureau of Mines

MOLYBDENUM. Indian Minerals. Yearbook 2013. (Part- II : Metals & Alloys). 52 nd. Edition. MOLYBDENUM. (FINAL RELEASE). GOVERNMENT OF INDIA. MINISTRY OF MINES .... of roasted concentrates, oxide or ferro-molybdenum in the defence ... out basic research on recovery of molybdenum from spent catalysts.

Jernkontorets rapport D 816

Apr 5, 2006 ... The vanadium ends normally up in a LD-slag containing approximately 5 % V2O5. The report is mainly .... roasting of titaniferrous ore concentrate and/or via a vanadium-rich slag (V-slag) from pre-treatment of ..... Figure 17 - Recovery of vanadium and molybdenum from spent catalyst. Calcination, 630°C...

Extractive Metallurgy of Rhenium: A Review - ResearchGate

Rhenium Recovery from. Pyrometallurgical Effluent Streams. • During molybdenum roasting rhenium present in the molybdenum concentrate is oxidized to rhenium heptoxide (Re2. O7. ) 2ReS. 2. +7.5O. 2(g). = Re. 2. O. 7(g). + 4SO. 2(g). (ΔG°298K = -406.5 kcal). • This volatile rhenium exits in the flue gas stream and is.

Leaching and recovery of molybdenum, nickel and cobalt from ...

Sep 28, 2016 ... b) To set up a batch recovery tests for the metals precipitation with Na2S from the synthetically prepared ..... leaching (PO2 = 965.3 kPa) of the molybdenite concentrate (Khoshnevisan et al., 2012). At least .... Co/Ni. During the leaching process, roasted spent catalyst (at 500°C) was primarily treated with.

National Metallurgical Laboratory - Hydrometallurgy

Copper powder from various solid waste containing copper. Recovery of zinc from zinc concentrate, zinc dross/residue. Recovery of nickel as nickel sulphate and ferronickel from spent nickel catalyst. Recovery of Cu,Ni,Co from sea nodules by reduction roasting and ammoniacal leaching. Recovery of valuable metals from...

Roasting of sulphide using carbothermal reduction - SciELO Colombia

In this paper, we analyze sulfur concentrates rich in copper, iron, and molybdenum that are obtained through rougher flotation and differential floats, which give rise to different laws. .... Once the roasting temperature was set up, for which the maximum molybdenum value was obtained, work was started with molar variations.

Spent catalyst Suppliers - Tradekey

32 Products ... Find Spent catalyst Manufacturers, Spent catalyst Suppliers & Wholesalers of Spent catalyst from China, Hong Kong, USA & Spent catalyst Products from ... Spent Molybdenum And Vanadium Refinery Catalyst Concentrates ... For sale in 100 to 300 ton lots, spent molybdenum and vanadium refinery catalysts.

CPC Definition - C22B PRODUCTION AND REFINING OF METALS ...

the production of metal by smelting, roasting or furnace method;. the extraction of ... If a document discloses an acidic leaching process of an ore or concentrate in general, then classify in the head group C22B 3/06;. If a document .... General method for recovering metals from spent catalysts (C22B 7/009). Working-up flue...

Spent Catalyst Report | Cracking (Chemistry) | Oil Refinery - Scribd

Product 90 - 95 ... Spent Catalyst Report - Download as PDF File (.pdf), Text File (.txt) or read online. ... preheated in a fired heater (600-800 degrees F) and then charged under pressure (up to 1,000 psi) through a fixed-bed catalytic .... For instance, roasting with soda converts molybdenum and vanadium into water-soluble...

Navin Mittal - Director | LinkedIn

Recovery of tungsten as metal Compounds from tungsten carbide scrap. The key unit operations include roasting, alkali leaching, purification, solvent extraction, evaporation and crystallization. - Processing of spent catalysts for the recovery of molybdenum, vanadium, tungsten, cobalt and nickel. The flowsheet is based on...

ITC (HS) - DGFT

This Chapter does not cover: (a) Slag or similar industrial waste prepared as macadam (heading 2517);. (b) Natural magnesium carbonate (magnesite), whether or not calcined. (heading 2519);. (c) Sludges from the storage tanks of petroleum oils, consisting mainly of such oils (2710);. (d) Basic slag of Chapter 31;. (e) Slag...

Molybdenum - Freeport Resources Inc.

Molybdenum is valued for its properties as a catalyst in the petroleum ... and concentrate, which was up from the 8900 t produced in 2003 and the 7950 ..... Conventional. Japan. Item No. Description. MFN. GPT. USA. Canada. Rate (1). WTO (2). 26.13. Molybdenum ores and concentrates. 2613.10. Roasted. Free. Free. Free.

Final Best Demonstrated Available Technology (BDAT) Background ...

This mixture is roasted at about 850°C, and the vanadium oxides are converted to water-soluble sodium metavanadate, NaVO-. The vanadium is .... The process separates the spent catalyst into four products: molybdenum trisulfide, vanadium pentoxide, alumina trihydrate, and nickel-cobalt concentrate. The spent catalyst is...

Vanadiferous Titanomagnetite "VTM" Concentrate - VanadiumCorp ...

Feb 28, 2017 ... Successful trials conducted with a vanadiferous titanomagnetite concentrate from the Vanadiumcorp Lac Dore Vanadium Project. ... Location agnostic: Creates opportunity for process technology centers next to primary vanadium resources and secondary vanadium feedstocks such as spent catalysts, slags...

Separation of Vanadium and Tungsten from Sodium Molybdate ...

May 3, 2014 ... Abstract: Vanadium and molybdenum are recovered from spent petroleum PEMEX catalyst in the form of sodium vanadate and molybdate by ... Selective Separation and Extraction of Vanadium(IV) and Manganese(II) from Co-leaching Solution of Roasted Stone Coal and Pyrolusite via Solvent Extraction.

Cobalt processing | Britannica.com

At higher temperatures up to the melting point of 1495 °C (2723 °F), the stable form is face-centred cubic. ... For copper-cobalt ores, a sulfide concentrate is roasted under controlled conditions to transform most of the cobalt sulfide to a soluble sulfate while minimizing the change of copper and iron to their water-soluble...

Sulphating roasting of copper-cobalt concentrates

The objective of roasting is a selective sulphation of copper and cobalt, while ferrous minerals and components are oxidized to haematite. The sulphates are dissolved in the leaching stage. Calcine leaching is often carried out with spent acid to improve leaching kinetics and to recover also the small portion of copper oxides...

Recovery of the Components of Spent C18-HC Catalyst and Reuse ...

infancy even fifty years ago. Most frequently used metals in the catalysts are critical ones such as cobalt, nickel, molybdenum, vanadium, copper, zinc etc in addition to noble metals. However there have been discouraging factors in the way of taking up the processing of spent catalysts for metals values. Some of these are:.

PRODUCTION AND REFINING OF METALS - Cooperative Patent ...

the production of metal by smelting, roasting or furnace method; the extraction of metal compounds from ore and concentrates by wet processes; electrochemical treatment of ores and metallurgical .... General method for recovering metals from spent catalysts (C22B 7/009). Working-up flue dust (C22B 7/02). Working-up...

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