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The use of xanthate and dithiophosphate in the collector suite allows the coexistence of dixanthogen and free dithiophosphate radical because the latter has a higher redox potential requirement ...
INTERPRETING THE ROLE OF REAGENTS 175 Introduction The platinum group elements (PGE) in the Merensky Reef in the Bushveld Complex are strongly associated with the base metal sulphide (BMS) minerals present in the Reef, either as discrete platinum group minerals (PGM) included or attached to the sulphides, or in solid solution with these
Synopsis. Five novel silver(I) clusters constructed with ethynide and dithiophosphate were successfully synthesized and structurally characterized by singlecrystal Xray crystallography, two of which are templated by carbonate ion in situ generated from the fixation of CO 2 in the atmosphere, and the other three silver(I)ethynide clusters encapsulate a sulfide ion in the center by variation ...
An investigation into the role of DTP as a cocollector in the flotation of a South African PGM ore: 2011: Chaponda, B. Using IsaMill technology in main stream grinding applications in Platinum Ores: 2011: Massey, W. Investigating the effect of energy input on flotation kinetics in an oscillating grid flotation cell: 2011: Mhlanga, S.
Abstract. Tribochemical interactions between zinc dithiophosphate (ZDDP) and micellar calcium borate (CB) under boundary lubrication were investigated by coupling, in the same location of the wear track, both analytical TEM analysis of collected wear fragments from the tribofilm and XPS surface analysis of the tribofilm directly underneath.
Oct 10, 2015· The role of single collectors and collector mixture were evaluated in terms of copper grade and recovery. • Examined the flotation results to investigate that whether there was synergistic effect arising from mixing collectors. • The information will help in the flotation of copper smelter slag for better copper grade and recovery.
The formulation and use of mixed collectors in sulphide flotation. ... The role of dithiophosphate as a cocollector in the flotation of a platinum group mineral ore ... Pulp pH plays a ...
The findings from these studies are rationalized and explained by drawing on concepts and insights from coordination chemistry. A comparison between the interactions with various minerals and metals of dithiophosphinate and dithiophosphate analogues brings out some of the subtleties that seemingly minor changes in collector chemistry can make.
Zinc dithiophosphate are produced in two steps. First phosphorus pentasulfide is treated with suitable alcohols (ROH) to give the dithiophosphoric acid. A wide variety of alcohols can be employed, which allows the lipophilicity of the final zinc product to be fine tuned; the resulting dithiophosphate is then neutralized by adding zinc oxide:
Zinc dithiophosphate are produced in two steps. First phosphorus pentasulfide is treated with suitable alcohols (ROH) to give the dithiophosphoric acid. A wide variety of alcohols can be employed, which allows the lipophilicity of the final zinc product to be fine tuned. The resulting dithiophosphate is then neutralized by adding zinc oxide:
Role of additives and transition metals in lubricating oil oxidation. ... and Tribological Evaluation of TiO2Reinforced Boron and Nitrogen coDoped Reduced Graphene Oxide Based Hybrid Nanomaterials as Efficient Antiwear Lubricant Additives. ACS Applied ... Thiolate C−S and Dithiophosphate Ester C−O Heterolyses within a Dimolybdenum(V) System.
A hydraulic fluid comprising a lubricant base oil in combination with (a) from to 5 %wt of magnesium salicylate, (b) from to 8 %wt of zinc dithiophosphate, and optionally (c) from to 5 %wt of a dicarboxylic acid or its mono or diester or its monoamide or diamide or imide containing in total between 4 and 70 carbon atoms ...
Interpreting the role of reagents in the flotation of platinumbearing Merensky ores media, the mechanism of activation in this pH range may be via the reaction of the collector with hydroxide precipitates (Ralston and Healy, 1980; Laskowski et al., 1997). Buswell and Nicol (2002) carried out an electrochemical
Jan 07, 2019· The findings from these studies are rationalized and explained by drawing on concepts and insights from coordination chemistry. A comparison between the interactions with various minerals and metals of dithiophosphinate and dithiophosphate analogues brings out some of the subtleties that seemingly minor changes in collector chemistry can make.
13 days ago· Sodium diethyl dithiophosphate was chosen over other DTPs such as sodium diisobutyl dithiophosphate so as to minimise any detrimental side effects of frothing that would confound the results . DOW 200, supplied by Betachem, was used as a frother at a fixed dosage of 40 g/t.
AbstractIn situ spacer layer interferometry has been used to monitor and compare the formation of both tribo and thermal zinc dialkyldithiophosphate (ZDDP) films on steel surfaces. For the ZDDP solution studied, negligible thermal film formation takes place below a temperature of 110°C, but a ZDDP tribofilm is generated on rubbed surfaces even at room temperature.
The procedure is similar to that used in the synthesis of 8‐DP‐11‐M, using didodecyl dithiophosphate ( g, mmol) instead of diisooctyl dithiophosphate. Didodecyl dithiophosphate had already been prepared by the same method as described for the preparation of diisooctyl dithiophosphate.
behave in their triple role as antioxidants, corrosion inhibitors and antiwear agents. This paper reviews the history of ZDDPs as lubri ... Current usage of zinc dithiophosphate in the United States is estimated at 30,000,000 pounds per year on a active ingredient basis.
Jul 12, 2014· Optimization of Cu–Zn Massive Sulphide Flotation by Selective Reagents. ... The role of dithiophosphate as a cocollector in the flotation of a platinum group mineral ore. Miner. Eng. 36, 100–104 (2012) Google Scholar. 16. J. Wiese, P. Harris, D. Bradshaw, Investigation of the role and interactions of a dithiophosphate collector in the ...
Dec 15, 2016· In this paper, the effect of water molecule on the three typical thiol collectors (xanthate, Received in revised form 3 July 2016 dithiocarbomate and dithiophosphate) interactions at the galena (PbS) and sphalerite (ZnS) surfaces has Accepted 12 July .
Aug 01, 2000· Read "Tribochemical interactions between molybdenum dithiophosphate and succinimide additives, Surface and Interface Analysis" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
The role of testing in CLP; CL Inventory. ... Substance Information. Substance information. Infocards are automatically generated based on industry data. What is an infocard? See a problem or have feedback? RSS. Dibenzyl hydrogen dithiophosphate . Regulatory process names 1 IUPAC names 1 Other identifiers 1 . EC / List no.: .
The role of dithiophosphate as a cocollector in the flotation of a platinum group mineral ore. Article. Oct 2012; Kirsten Claire Corin. J. C. Bezuidenhout. O''Connor.
In the present study the effect of adding sodium diethyldithiophosphate (DTP) to sodium isobutyl xanthate (SIBX) as a cocollector in the flotation of a platinum group mineral (PGM) ore was studied with a view to investigating whether there was any evidence of a synergistic beneficial effect resulting from the use of the mixture.
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