ترمودینامیک جذب رنیوم با تبادل یونی رزین

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۸50۲ ‎١‏ ع لاك 

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Rhenium Chemical element with the symbol of Re and - atomic number 75 It is a silvery-white, heavy and one of the - rarest elements in the Earth's crust = Rhenium resembles manganese chemically- and is obtained as a by-product of molybdenum and copper refinement. Rhenium shows in its compounds a wide variety of 5 2ReS,(s) + ‏(ع) ره ند‎ < Re, O,(g) +4SO,(g) 

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Applications of (۱-۱۰ Rhenium is added to high-temperature- superalloys that are used to make jet engine parts, making 70% of the -worldwide : The alloys norm: .rhenium productio Another major application is in platinum- rhenium catalysts, which are primarily used in making lead-free, high-octane -gasoline - 05 015696 390 صنة] 

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Applications of Rhenium(catalyst) Rhenium in the form of rhenium-platinum alloy is used as catalyst for catalytic reforming, which is a chemical process to convert petroleum refinery naphthas with low octane ratings into -high-octane liquid pro Worldwide, 30% of cat process contain rhe is the other reaction fo ich rhenium is used as catalyst. Normally Re,O, on alumina is used for this process. Rhenium catalysts are very resistant chemical poisoning from nitrogen, . sulfur and phosphorus ts used for this jolefin/metathesis No 

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Perrhenate The perrhenate ion is ReO,- and a perrhenate is a- compound containing this ion. Salts of perrhenic acid are known as perrhenates. The henate anion is .tetrahedral, as shown by s The perrhenate anion: coordinating anion. It is a . stronger than ‏رم‎ BF Structurally the behavior of ReO,- resembles that of - perchlorate, ClO,-: perrhenate and perchlorate salts are .often isomorphous er base than Cl- or Br- but 

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KReO, is common and is the basis of the- recovery of rhenium compounds from natural ores and laboratory residues 

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The crystal structure of ammonium perrhenate with orientationally ordered ammonium ions (blue) and ReO, (grey) tetrahedra 

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perrhenate Ammonium perrhenate (APR) is the - ammonium salt of perrhenic acid, NH,ReO,. This is the most common form in which rhenium is traded. Rhenium content of APR i all ‏ره اك‎ aya Reactions 0 Pure rhenium powder c can be produced- hydrogen from APR by reducing it with NH,ReO, + 7H, —2 Re +8H,0+ 22 NH, 

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Amberlite- -Purolite Varion- 

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Amberlite Amberlite selective resins are widely used for metal removal and recovery in mining and che micals, ground 

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Varion Highly effective in solid phase synthesis applications Economical manufacture ¢ Highly ‏ی‎ i Exceptionally 

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Se ا وتو 086 fliter) ak liter) 075 3.34] 0.69 

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Procedure of reaction Dissolving perrhenate potassium in- pure water in pure water dissolving .0500 gr- each resin Add 150 ml soluti chemical analyze before and after- adsorption : aggitation for 4 fas 25 C- Amount of rhenium- 

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و۱ 

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1 ‏و‎ val i 0 

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Cc 3 10 50 80 177.56 414.31 710.25 

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ورهار رت و23 ‎perrhenate on adsorption of‏ ‎rhenium(temp‏ ‎Cs, (Amb.) Ci, (Var) Cs, (Pur.)‏ 1,5-2.5 44.19 49.71 29.30 2258 4.5-5.5 2.40 4.90 9.0 4.30 6.40 25.0 3 1.84 35.0 6.59 1.84,7.80 45.0 1.98 1.18 60.0 

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الس “لم ۵0+ ۱۳-۵۳ |] ۹۰1۰ [Cy les el 00 qa. [Cre|™ 

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A ۱۱ ‏فیاافت‎ 1.65- 0.75- 0.07 0.63 0.64 1.92 1.66 0.90 0.49- 0.93- B = logiC am] —logiCrem] عانا۳۰ 1.51 0.83- 0.15- 1.43 1.45 2.79 1.50 0.62 0.97- 1257 - 

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A=-0.653B+0.1436 pas: -0.5 Y-Values ۱! ‏اس بي سس‎ ROVE Mii Axis Title os عع كتى وى تمت ‎Sa aa SS‏ 9 ل 7 s Sy ۳۳-۳ 0-2 NY Qs فا 115 

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A=-0.7091B+0.3784 Y-Values 0 6 7 0 0 1 2 

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Amberli Purolite te 

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د 

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۱۷۸ ‏نزب‎ ‎InD(Re) Purolite Varion Amberlite 6.98 7.19 7.51 3.64 8.49 8.20 8.66 3.6 10.63 10.71 11.47 3.25 11.47 3.14 1115 11.32 11.92 3.00 

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Variation of Distribution Coefficient according to reverse of temperature 7 ۰ ۸۵ 12 ۰ ۰ en ‏عم‎ ‎Qa ۰ = 5 3 ۰ ; y = -6.8296x + 32.917 * 6. s ۰ ۰ ‏و ود‎ 31 32 33 34 35 38 37 1000/T (1/K) 

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Variation of Distribution Coefficient according to reverse of temperature 3 2 2 11 + ۰ 5 ۰ = —- 5 9 y = -6.3805x + 30.853 7 > 3 23 aa 32 a3 34 1000/T (1/K) ss xe 37 

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Variation of Distribution Coefficient according to reverse of temperature 1 

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Amberlite 56.781 1 56.781- 0.274T Varion 53.047 : 53.047- 0.257T Purolite 50.205 50.205- 0.247T 

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CONCLUSION In the most of resources the stoichiometry factor of ionic reaction is one but after a lot of researches it changed to 0.65,also the selection equilibrium factor for amberlite(0.65) an olite(0.71),shows That pueolite ha gher capacity for adsorption of cl. = The thermodynamic factors are using for designing and utilizing ionic systems that extract Rhenium. 

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