Which of the following processes is used for the concentration of bauxite
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(i) Chemical method or Leaching method is employed when the ore is in a very pure form . (ii) The ore is treated with a suitable reagent such that the ore is soluble in its but the impurities are not . (iii) The impurities are removed by filtration . (iv) The solution of the ore,, the filtrate is treated with a suitable reagent which precipitates the ore .
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Describe the Hall process for the production of aluminum from the mineral bauxite. How is energy saved by recycling aluminum rather than preparing it by the Hall process? AI Homework Help. Expert Help. Study Resources. Log in Join. QE, Ex QE, Ex All Textbook Solutions; Chemistry;
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Aluminium Ore Ores of Aluminium Aluminium is a highly reactive metal, belonging to the IIIA group of the periodic table. In nature, aluminium is found in the form of its oxide in its ores. The important ores of aluminium are Bauxite Al 2 O 3 .2H 2 O Corundum Al 2 O 3 Cryolite Na 3 AlF 6 Metallurgy of Aluminium
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Baeyer's process is used to leach Red Bauxite, which has Fe2O3 as the chief impurity. Serpeck's process, on the other hand, is used to leach White Bauxite, which has Silica as main impurity. Both are efficient for their respective ores. But Baeyer's process is more frequently used, as Bauxite, more often than not, is also a source of Gallium ...
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The discovery of bauxite occurred near Les Baux, France, an ancient village near the Mediterranean Sea named for, and carved from, a rocky outcrop. On March 23, 1821, a geologist named Pierre Berthier discovered a reddish, claylike material. He found that the substance, later named bauxite after the village, consisted of about 50 percent ...
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In Bayer's process, aluminium ore is heated with concentrated caustic soda while in Hall's process, it is heated with aqueous sodium carbonate to obtain wate...
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Alumina Extraction Problem. In the standard Bayer Process for refining bauxite to produce alumina, the dissolution of the alumina in the ore to form sodium aluminate is accomplished in autoclaves under high pressures varying from 70 to 200 pounds per square inch. However, some lateritic bauxite ores are readily soluble in caustic, making it ...
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Ans. Baeyer's process : It is the process for concentration of Bauxite ore. The impure bauxite is purified to pure alumina through different steps. Step I : Conversion of impure bauxite to sodium aluminate. Step II : Conversion of sodium aluminate to aluminium hydroxide. Step III : Conversion of Al(OH)3 to pure alumina by heating it. f.
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During the processing of bauxite to alumina in the Bayer process, gallium accumulates in the sodium hydroxide liquor. From this it can be extracted by a variety of methods. The most recent is the use of ionexchange resin. Achievable extraction efficiencies critically depend on the original concentration in the feed bauxite.
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Answer: hi friends............ Click here 👆 to get an answer to your question ️ Describe the Hall's process of concentration of Bauxite ore
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Hall's process for leaching of alumina from bauxite: (1) Bauxite ore and sodium carbonate are fused toghether to convert aluminium oxide into soluble sodium metaaluminate. The insoluble residue contains the impurities of silica and iron oxide. The fused mass is treated with water.
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How many of the following species are related to Hall's process of purification of bauxite? White bauxite, Na(2)CO(3), CO(2), cryolite, red bauxite, NaOH ... The reaction not involved in the concentration of bauxite are by Hall's process is. 02:07. View Solution. ... Describe Hall's process for concentration of bauxite.
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How is bauxite mined and processed? Pure aluminas are used for pottery, ceramics, refractories, catalyst supports, and for the production of aluminum by the Hall process. Thus, bauxite and other aluminum containing minerals such as kaolinite ((Al_4Si_4O_{10}(OH)_8)) must be mined and processed to produce pure alumina.
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The ore obtained is concentrated by Hall's method. The concentration of Bauxite by Hall's method The hall method of concentration of Bauxite was invented in 1886 by the American chemist Charles Martin Hall. This is the reason the method is named Hall's method. It takes place by following three steps Step 1.
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The third most abundant element in the earth's crust—and its most plentiful metal—, aluminum is made from bauxite, a reddishbrown rock discovered in Les Baux, France, in 1821. ... headed by metallurgist Alfred E. Hunt, agreed to support the commercialization of Hall's process and founded the Pittsburgh Reduction Company. In 1888 Hall ...
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In the HallHéroult process, control of alumina concentration is crucial to process performance and safety. Existing logicbased alumina feed control typically implements overfeedbasefeedunderfeed cycles to control the cell voltage in a band to maintain the alumina concentration in a range. This, however, leads to significant variations of alumina concentration, and risks ...
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In Fig., the numbers on the graphs of equilibrium relate to caustic soda concentrations in Na 2 CO /C denotes aluminate ion concentration as Al 2 O 3 (A)/caustic soda concentration as Na 2 CO 3 (C). A typical Bayer process cycle with low temperature digestion is also shown. Virtually each bauxite contains more or less amount of clay minerals, mainly kaolinite (Al 2 (OH) 4 ...
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Find an answer to your question Describe Hall's process for concentration of bauxites . divyajain12 divyajain12 Science Secondary School answered Describe Hall's process for concentration of bauxites . See answer Advertisement ...
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(i) During extractino of aluminium from bauxite. The bauxite ore is concentrated by Bayer's Process. (ii) During concentration, baxuite is converted into alumina. (iii) Crude bauxite contains impurities like iron oxide and silica which are removed during Bayers' process. (iv) The ore is first group in a ball mil. Then it is leached by heating it with concentrated caustic soda solution under ...
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Describe Hall's process for concentration of bauxite. Text Solution. Describe Hall's Process. 04:56. Hall's process is used for purification of . Text Solution. In the HallHeroult's process, the principal reagent is mixed with 02:47. Ask Unlimited Doubts; Video Solutions in multiple languages (including Hindi)
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The reaction not involved in the concentration of bauxite are by Hall's process is. 02:07. View Solution. ADVERTISEMENT. The Product not involved in the concentration of bauxite are by Hall's process is. 02:07. View Solution. In the purification bauxite by Hall's process. 02:44. ... Describe Hall's process for concentration of bauxite.
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Answer the following questions: Describe Hall's process for concentration of bauxite. ... Describe Hall's process for concentration of bauxite. Ask doubt. Courses. IITJEE. Class 11; Class 12; Dropper; NEET. Class 11; Class 12; Dropper; UP Board. Class 9; Class 10; Class 11; Class 12; Bihar Board.
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to describe of its texture and colour changes. Based on the depth of bauxite profile and test pit points (50 ... area and has major concentration of bauxite deposite. Most of lowland morphology occupies the area around river, swamps and valley, with altitute of 10m 25m and slope of <15%. ... Tertiary, meanwhile, Hall (2012) has another ...
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OCLI5 Describe Hall's process for concentration of bauxite. Solution Verified by Toppr Was this answer helpful? 0 0 Similar questions In Serpeck process, bauxite is converted into AlN, which is hydrolysed to precipitate Al(OH) 3. If true, enter 1 else enter 0. Medium View solution >
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Step by step video image solution for How many of the following species are related to Hall's process of purification of bauxite? White bauxite, Na_(2)CO_(3), CO_(2), cryolite, red bauxite, NaOH by Chemistry experts to help you in doubts scoring excellent marks in Class 12 exams. ... Describe Hall's process for concentration of bauxite ...
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Bauxite is reacted with a conc. solution of NaOH under pressure for 2 hrs as a first step in obtaining Al 2 O 3. The impurities present in bauxite mainly Fe 2 O 3 and SiO 2 remain unaffected with conc. NaOH as impurities are not amphoteric. Bauxite, being amphoteric reacts with the base forming sodium salt [sodium aluminate] and water.
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