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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
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.
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.
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.
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.
Dithiophosphate has the formula [PO 2 S 2] 3−, which has C 2v symmetry. Sodium dithiophosphate, which is colorless, is the major product from the reaction of phosphorus pentasulfide with NaOH: P 2 S 5 + 6 NaOH → 2 Na 3 PO 2 S 2 + H 2 S + 2 H 2 O. Dithiophosphoric acid is obtained by treatment of barium dithiophosphate with sulfuric acid:
The invention relates to an analysis method for the structure of a ZDDP additive in lubricating oil. The analysis method comprises the following steps: heating the lubricating oil containing the ZDDP additive to a temperature of 160 to 240 DEG C under the protection of inert gas; carrying out sampling at intervals within to 6 h and subjecting obtained samples to infrared spectroscopic ...
Flotation of a copper sulphide ore from Okiep using thiol collectors and their mixtures The Journal of The South African Institute of Mining and Metallurgy VOLUME 105 NONREFEREED PAPER MARCH 2005 201 Figure 1—The final cumulative copper recovery vs. collector dosage obtained with C2X, diC2DTP and diC2DTC in the flotation of the Okiep copper ore
XXVI International Mineral Processing Congress (IMPC) 2012 Proceedings, New Delhi, India, 2428 September 2012. Pg . 2012: AlvarezSilva, M., Wiese, J. and O''Connor, An Investigation into the Role of the Froth Phase in the Flotation of Ug2 Ore using a Laboratory Column Flotation Cell.
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.
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.
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:
The role of dithiophosphate as a cocollector in the flotation of a platinum group mineral ore. 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 ...
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 ...
The antiwear and antiseizure performance and action mechanisms of zinc dithiophosphate (ZDDP) have been investigated under reciprocating pure sliding conditions to simulate piston ring and cylinder liner assembly, using new techniques. The Mini Traction Machine–Space Layer Imaging is a useful method for monitoring tribofilm formation by ZDDPs.
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.
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 .
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:
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 ...
The role of testing in CLP; CL Inventory. ... Substance information. Infocards are automatically generated based on industry data. What is an infocard? See a problem or have feedback? RSS. Sodium O,Odiisobutyl dithiophosphate. Regulatory process names 1 .
Dithiophosphate 25 belongs to both collector and ing agent, it is an effective collector of lead, copper, silver and sulphide ore activated zinc sulfide ore, commonly used in lead and zinc flotation separation operations collector galena., under certain conditions, also has some heavy metal oxide ore collector effect of the product is slightly soluble in water, can be directly added to the ...
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 ...
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.
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 ...
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