The aim of the present work was to develop a simple and rapid electrolytic extraction process of titanium [l-3] and its dioxide from the ilmenite ore of the Eastern Desert. The ore mother liquor used for the electrolysis process is either produced by direct leaching with 98% H,SO, (S/L = 1 : 15), 35% HCl (S/L = 1: 20) and alkaline digestion with caustic soda in a ball-mill autoclave at 175°C under a pressure of 9.5 kg cmP2, or it is prepared through the fusion method using NaOH or Na,S,O, separately as fluxes at 600-700°C.
EXPERIMENTAL
Synthesis of tris (thiourea) copper (i) sulphate by kwezi mwaka juliusMakerere University
its a well described report on SYNTHESIS OF TRIS (THIOUREA) COPPER (I) SULPHATE and this serves to industrial chemistry students doing transition metal chemistry.
property of Tris(acetylacetonato)manganese(III) MUKULsethi5
this presentation useful for discussing #chemical and #physical property and application of ..
#Manganese(III)acetylacetonate
#Manganicacetylacetonate
#3-Penten-2-one,4-hydroxy-,manganese(3+) salt
#Mangan(3+)tris[(2Z)-4-oxo-2-penten-2-olat]
#3-Penten-2-one,4-hydroxy-,manganese(3+)salt,(3Z)-(3:1)
in this I discuss chemical and physical property, #spectra, application, #harmness etc
Synthesis of tris (thiourea) copper (i) sulphate by kwezi mwaka juliusMakerere University
its a well described report on SYNTHESIS OF TRIS (THIOUREA) COPPER (I) SULPHATE and this serves to industrial chemistry students doing transition metal chemistry.
property of Tris(acetylacetonato)manganese(III) MUKULsethi5
this presentation useful for discussing #chemical and #physical property and application of ..
#Manganese(III)acetylacetonate
#Manganicacetylacetonate
#3-Penten-2-one,4-hydroxy-,manganese(3+) salt
#Mangan(3+)tris[(2Z)-4-oxo-2-penten-2-olat]
#3-Penten-2-one,4-hydroxy-,manganese(3+)salt,(3Z)-(3:1)
in this I discuss chemical and physical property, #spectra, application, #harmness etc
matboard photo frame CNC cutter used to cut the photo frame to decorate photo, cut matboard pattern after import the design into cutting table. Help you offer amazing design to customers.
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ELECTROLYTIC SEPARATION OF LEAD AND ITS DIOXIDE FROM CARBONATE ORE RESIDIUUMAl Baha University
Electrowinning work is carried out on the roasted Eastern Desert complex carbonate ore residuum. Lead and its dioxide are electrodeposited from various electrolyte ore baths and the results showed a wide variety of ore electrolyte solutions, either in the form of soluble simple ore salts, or those containing complex ore anions. The optimum conditions and the efficiency of the electrolytic extraction are determined experimentally on the ore leach solutions.
We present a study of the in-camera image processing through an extensive analysis of more than 10,000 images from over 30 cameras. The goal of this work is to investigate if image values can be transformed to physically meaningful values, and if so, when and how this can be done. From our analysis, we found a major limitation of the imaging model employed in conventional radiometric calibration methods and propose a new in-camera imaging model that fits well with today’s cameras. With the new model, we present associated calibration procedures that allow us to convert sRGB images back to their original CCD RAW responses in a manner that is significantly more accurate than any existing methods. Additionally, we show how this new imaging model can be used to build an image correction application that converts an sRGB input image captured with the wrong camera settings to an sRGB output image that would have been recorded under the correct settings of a specific camera.
We also describe a method to construct a sparse lookup table (LUT) that is effective in modeling the camera imaging pipeline that maps a RAW camera image to its sRGB output based on the new aforementioned color processing model. We show how to construct a LUT using a novel nonuniform lattice regression method that adapts the LUT lattice to better fit the underlying 3D function which was previously formulated as a RBF function. Our method offers not only a performance speedup of an order of magnitude faster than RBF, but also a compact mechanism to describe the imaging pipeline.
ELECTRODEPOSITION OF TITANIUM AND ITS DIOXIDE FROM ILMENITE Al Baha University
The aim of the present work was to develop a simple and rapid electrolytic extraction process of titanium [l-3] and its dioxide from the ilmenite ore of the Eastern Desert. The ore mother liquor used for the electrolysis process is either produced by direct leaching with 98% H,SO, (S/L = 1 : 15), 35% HCl (S/L = 1: 20) and alkaline digestion with caustic soda in a ball-mill autoclave at 175°C under a pressure of 9.5 kg cmP2, or it is prepared through the fusion method using NaOH or Na,S,O, separately as fluxes at 600-700°C.
matboard photo frame CNC cutter used to cut the photo frame to decorate photo, cut matboard pattern after import the design into cutting table. Help you offer amazing design to customers.
tel: 0086-13549354183
E-mail: sales02@cutcnccam.com
Skype: trinityhu
MSN: trinityhu@hotmail.com
QQ: 2355895767
ELECTROLYTIC SEPARATION OF LEAD AND ITS DIOXIDE FROM CARBONATE ORE RESIDIUUMAl Baha University
Electrowinning work is carried out on the roasted Eastern Desert complex carbonate ore residuum. Lead and its dioxide are electrodeposited from various electrolyte ore baths and the results showed a wide variety of ore electrolyte solutions, either in the form of soluble simple ore salts, or those containing complex ore anions. The optimum conditions and the efficiency of the electrolytic extraction are determined experimentally on the ore leach solutions.
We present a study of the in-camera image processing through an extensive analysis of more than 10,000 images from over 30 cameras. The goal of this work is to investigate if image values can be transformed to physically meaningful values, and if so, when and how this can be done. From our analysis, we found a major limitation of the imaging model employed in conventional radiometric calibration methods and propose a new in-camera imaging model that fits well with today’s cameras. With the new model, we present associated calibration procedures that allow us to convert sRGB images back to their original CCD RAW responses in a manner that is significantly more accurate than any existing methods. Additionally, we show how this new imaging model can be used to build an image correction application that converts an sRGB input image captured with the wrong camera settings to an sRGB output image that would have been recorded under the correct settings of a specific camera.
We also describe a method to construct a sparse lookup table (LUT) that is effective in modeling the camera imaging pipeline that maps a RAW camera image to its sRGB output based on the new aforementioned color processing model. We show how to construct a LUT using a novel nonuniform lattice regression method that adapts the LUT lattice to better fit the underlying 3D function which was previously formulated as a RBF function. Our method offers not only a performance speedup of an order of magnitude faster than RBF, but also a compact mechanism to describe the imaging pipeline.
ELECTRODEPOSITION OF TITANIUM AND ITS DIOXIDE FROM ILMENITE Al Baha University
The aim of the present work was to develop a simple and rapid electrolytic extraction process of titanium [l-3] and its dioxide from the ilmenite ore of the Eastern Desert. The ore mother liquor used for the electrolysis process is either produced by direct leaching with 98% H,SO, (S/L = 1 : 15), 35% HCl (S/L = 1: 20) and alkaline digestion with caustic soda in a ball-mill autoclave at 175°C under a pressure of 9.5 kg cmP2, or it is prepared through the fusion method using NaOH or Na,S,O, separately as fluxes at 600-700°C.
Electrolytic recovery of antimony from natural stibnite ore
Loutfy H. Madkour a, *, Ibrahim A. Salem b
a Chemistry Department, Faculty of Science, Tanta University, Tanta, Egypt b Geology Department, Faculty of Science, Tanta University, Tanta, Egypt
Received l0 November 1995; accepted 6 December 1995
Abstract
Stibnite ore at Wadi Abu Quraiya, situated in the central Eastern Desert of Egypt has been subjected to petrographical, mineralogical, infrared, X-ray diffraction, chemical and spectral analyses. Hydrometallurgical treatment based on leaching with acids, precipitation and electrode- position of metal values from the ore have been developed. Studies to investigate suitable electrolytic baths for the cathodic deposition of metallic antimony either directly from the leach liquor or in the presence of complexing agents have been carded out. The influence of various factors on the electrodeposition process of the element from its electrolyte solutions is discussed. Advantages of the flowsheet and various approaches depending on convenient electrolytes for the deposition of antimony from the stibnite ore have been investigated. The results of spectrophoto- metric and chemical analyses revealed that the purity of the metal is > 99%.
Electrolytic recovery of antimony from natural stibnite ore Al Baha University
Stibnite ore at Wadi Abu Quraiya, situated in the central Eastern Desert of Egypt has been subjected to petrographical, mineralogical, infrared, X-ray diffraction, chemical and spectral analyses. Hydrometallurgical treatment based on leaching with acids, precipitation and electrode- position of metal values from the ore have been developed. Studies to investigate suitable electrolytic baths for the cathodic deposition of metallic antimony either directly from the leach liquor or in the presence of complexing agents have been carded out. The influence of various factors on the electrodeposition process of the element from its electrolyte solutions is discussed. Advantages of the flowsheet and various approaches depending on convenient electrolytes for the deposition of antimony from the stibnite ore have been investigated. The results of spectrophoto- metric and chemical analyses revealed that the purity of the metal is > 99%.
Keywords: stibnite; leaching; antimony extraction
Extraction of Silver From Photographic Waste--and their toxic effects and analysis of the amount is silver extracted from x-ray waste,methods of analysis of amount of toxic silver
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This results in only 2 molecules of ATP per each glucose molecule instead of the 36 or so ATPs healthy cells gain. As a result, cancer cells need to use a lot more sugar molecules to get enough energy to survive.
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Cancer cells only partially break down sugar molecules. They overuse the first step of respiration, glycolysis. They frequently do not complete the second step, oxidative phosphorylation.
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PRESENTATION ABOUT PRINCIPLE OF COSMATIC EVALUATION
ELECTRODEPOSITION OF TITANIUM AND ITS DIOXIDE FROM ILMENITE
1. J Electrounal Chem.. 199 (1986) 207-210
Elsewer Sequoia S.A.. Lausanne - Printed m The Netherlands
207
Short communication
ELECTRODEPOSITION OF TITANIUM AND ITS DIOXIDE FROM
ILMENITE
L.H. MADKOUR *
Cherntsty Department, Faculiy of Sctence, Tantu lJmaerst&, Tunta (Egvpt)
A.S. FOUDA
Chemtstn Department, Faculty of Sctence, Mansouro Unwerstty, Munsour~~ (Egvpt)
(Recewed 15th April 1985: in revised form 13th September 1985)
INTRODUCTION
The aim of the present work was to develop a simple and rapid electrolytic
extraction process of titanium [l-3] and its dioxide from the ilmenite ore of the
Eastern Desert. The ore mother liquor used for the electrolysis process is either
produced by direct leaching with 98% H,SO, (S/L = 1 : 15), 35% HCl (S/L = 1: 20)
and alkaline digestion with caustic soda in a ball-mill autoclave at 175°C under a
pressure of 9.5 kg cmP2, or it is prepared through the fusion method using NaOH or
Na,S,O, separately as fluxes at 600-700°C.
EXPERIMENTAL
Ti and TiO, were prepared by electrodeposition on platinum sheets as described
previously [3-61. All the chemicals used were of BDH Analar grade and were used
without further purification; 0.1 M ore leach chloride and sulphate were prepared
from doubly distilled water and their concentrations were determined as given by
Vogel [7].
RESULTS AND DISCUSSION
Baths suitable for the electrodeposition of Ti and TiO, are indicated in Table 1.
The production of titanate and its dissolution are assumed. The effects of current
density, complexing agents. ammonium salt, temperature and current efficiency were
studied. Also, we confirmed the presence of positively and negatively charged
complex species by carrying out experiments using the ion-exchange resin technique
l To whom correspondence should be addressed.
0022-0728/86/$03.50 ‘a 1986 Elsewer Sequoia S.A
2. TABLE 1
Suitable baths for the electrolyttc extraction of tttanium and its dioxrde from rlmenite ore
Bath Composttion of electrolyte solution
(in 500 cm3 ore liquor)
PH Current Product Complex spectes Current Recovery
density/ efftctency /W
mA cme2 /%
Sulphate
Chloride
Ammonia
Borate
Acetate
Tartarate
Bromide
Fluoride
Oxalate
Urea
Sodium
hydroxide
Ore leach sulphate (0.1 M) and 20 cm3
1 M H,SO.,
Ore leach chloride (0.1 M) and 10 cm3
perchloric acid
Ore leach chlonde (0.1 M), 60 g
NH,CI and NH,OH (1: 1)
Ore leach chlonde (0.1 M). 60 g NH,CI,
3 g borax and NH,OH (1: 1)
Ore leach chloride (0.1 M), 30 g NH,Cl,
50 cm3 (1 M) acetic acid and NH,OH (1 : 1)
Ore leach chloride (0.1 M), 40 g NH,CI,
50 cm3 (1 M) tartanc acid and NH,OH (1: 1)
Ore leach chloride and 20 cm3 2 M HBr
Ore leach chloride (0.2 M). 50 g
NH,CI, NaF and NH,OH (1: 1)
Ore leach chloride (0.1 M). 60 g NH,Cl,
50 cm3 (1 M) oxalic acid and NH,OH (1: 1)
Ore leach chloride (0.1 M) and 5 g urea
Ore leach chlonde (0.1 M), 60 g
NaOH and 15 cm3 glycerol
4.0 250 T1 [Ti(OH),HSO,]‘+
99.3 96.2
3.8 240 TI [Tt(OH)Cl, +TI]‘+
99.4 95.6
FXNH3),13+
9.0 200 Ti 98.7 97.1
[Ti(B407)12’
9.0 400
7.5 230
Tl
TI
99.6 94.3
99.8 96.2
5.0 250 TI [TK&$H,)I’+ 99.6 93.4
4.0 300 Ti [Tt(OH)Br2 + Ti]j+ 99.4 94.7
8.0 200 99.2 95.2
8.0 600
8.0 300
TiO 2 [TC,)12-
Ti [Ti(C,Q, )12’
Ti lTWWH,),),13+
99.5 96.3
98.6 94.5
10.0 300 TI [Ti(OH),]” 99.4 93.8
3. 209
[8,9]. The structures of titanium complexes of the type [Ti(NH,),13+ were proved
[lo]. Also, the tartarate 1111, oxalate 1121, bromide, chloride 1131, perchlorate 1141,
sulphate [14], urea [14] and fluoride [15] [Ti(F,)12- complexes of titanium were
identified and proved conductometrically. The formation of Ti and TiO, is dis-cussed.
The results of chemical and spectrophotometric analyses indicate that the
purity of titanium is 99.1%. Also the electron micrograms confirmed by the X-ray
standard tables (ASTM) for TiO, coincide well with those given by chemical
analysis.
The reaction of ilmenite ore with NaOH and its dissolution in H,SO, and WC1
can be represented as follows:
FeTiO, + 2 NaOH + Na zTiO, + Fe0 +H,O
(1) NaZTiO, C 3 H,S04 -+Ti(SO,),+Na,SO,+3 H,O
Ti(SO,), + H,O + TiOSO, + H *SO,
(2) Na,TiO, + 4 HCI -+Ti(OCl)z+2 NaCl +2 Hz0
Ti
The following equation represents the mechanism of formation of the element
from the different baths used 1161:
Ti(L)“++ ne”-+Ti+L
where L is the ligand of the complex species and n is the number of positive charges
on the species. Adsorption of hydrogen ions and complex species on the surface of
Ti protects it from oxidation.
During the deposition of TiO,, the complex species [TiF612- migrated towards the
anode, where it loses its negative charge and dissociates yielding Ti4’ ions. These
ions are oxidized by the OH. radicals at the anode to form TiOz [17].
[TiF612- +Ti4++6 F-Ti4++
2 H,O~TiO~+4 H” i
Effect of current density
At low current density (200 mA cme2}, only a thin layer of Ti was deposited and
an oxide with low oxygen content was obtained in the case of TiO, deposition. At
higher current densities (> 400 mA cm-‘), a non-adherent and randomly oriented
deposit [18] of Ti and an oxide with higher oxygen content were obtained. Suitable
current densities for cathodic and anodic deposition are shown in Table 1.
4. Effect of complexmg agent/metal ion ratto
Smooth deposition of bright grey-silver Ti was obtained at low concentration
( = 0.1 M) of complexing agent. Also, the adsorption of complexing agents at the
cathode prevents the oxidation of Ti.
Effect of ammonium salt
Ammonium salt acts as a buffering medium for the bath; it assists the stability of
the Ti complexes. prevents the precipitation of Ti hydroxide as the pH is raised. and
increases the conductance of the solution.
Effect of temperature
Increasing the temperature from 25 to 50°C favours the deposition of Ti and TiO,
owing to the acceleration of both the ionic migration of the complex species and the
oxidation of Ti” at the anode.
Current efficiency
In the ammonia and urea baths the current yield is nearly 99%. The platinum
plate and the dilute solution of Ti are responsible [19] for the current yield being
slightly lower than 100%.
ACKNOWLEDGEMENT
The author would like to thank the Egyptian Geological Survey and Mining
Authority. A.R.E.. for kindly supplying a sample of the title ore.
REFERENCES
1 T. Hammada. Japanese Patent. 2357 (55). 11 Apnl (1957) 51.
2 N.T. Kudryavtsev and R.G. Golovchanskaya, USSR Patent 127. 10 March (1960) 121.
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6 L.H. Madkour. J. Chem. Tech. Biotechnol., 35 A (1985) 108.
7 A. Vogel. Quantitative Inorganic Analysis, Wiley. New York, 1975, pp. 6088615.
8 A.S. Fouda. 3. Electroanal. Chem., 110 (1980) 357.
9 M.M Elsemongy, M.M. Gouda and Y.A. Elewady, J. Electroanal. Chem., 79 (1977) 376.
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11 S.P. Biswas, T.S. Krishnamoorthy and C. Venkateswarlu. Indian J. Chem., 14 (1976) 592.
12 Ya. S. Kamenlsev, Probl. Sovrem. Anal. Khim., 1 (1976) 60.
13 A.G Stromberg and A.I. Kartushmskaya. Fiz. Khtm. Anal.. Akad. Nauk SSSR. Sibirak Otd Inst
Neorgankhrm., (1963) 315.
14 F.A. Cotton and G. Wilkinson, Advanced Inorganic Chemtstry, 3rd ed.. Wiley. New Delhi. 1976, p.
810
15 Ya.A. Buslaev, V.A. Boekbareva and N.S. Nikolaev, Izv. Akad. Nauk SSR Otd. Khim. Nauk. 3 (1962)
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16 M.M. Elsemongy, Y.A. Elawady. M.M Gouda and A. Elasklany. J. Electroanal. Chem., 84 (1977) 359.
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19 AS. Fouda and M.M. Eisemongy, J. Electroanal. Chem.. 124 (1981) 301.