Sorption extraction of rare-earth elements on sulfonic cation-exchange resin KU-2-8 from nitrate solutions of loparite concentrate development

2021 ◽  
Vol 22 (7) ◽  
pp. 312-317
Author(s):  
Dmytro Yelatontsev ◽  
◽  
Anatoly Mukhachev ◽  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Cation Exchange ◽  
Exchange Resin ◽  
Raw Materials ◽  
Cation Exchange Resin ◽  
Sodium Content ◽  
Study Results ◽  
Loparite Concentrate ◽  
Nitrate Solutions

The experimental-industrial study results of the process of sorption of rare-earth elements on sulfonic cation-exchange resin KU-2-8 from nitrate solutions of loparite concentrate development are presented. Values of different obtained elements are discussed. Different changes in processes are described. Reprocessing loparine raw materials in the close cycle without hydrochloric and sulfuric acid, and excess of normative sodium content in productional concentrate is possible. Keywords: ionite, sorption, loparite concentrate, rare-earth element, thorium.

scholarly journals Adsorption of rare earth elements by strong acid cation exchange resin thermodynamics, characteristics and kinetics

2018 ◽  
Vol 1 (1) ◽  
Author(s):  
Yasser M. Khawassek ◽  
Ahmed A. Eliwa ◽  
El Sayed A. Haggag ◽  
Sayed A. Omar ◽  
Saad M. Abdel-Wahab
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Cation Exchange ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Strong Acid ◽  
Acid Cation

REMOVAL OF STRONTIUM AND CESIUM FROM MILK

1959 ◽  
Vol 37 (1) ◽  
pp. 1287-1292 ◽  
Author(s):  
B. B. Migicovsky
Keyword(s):  
Cation Exchange ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Physiological Mechanism ◽  
Calcium Content ◽  
Sodium Content ◽  
Successive Treatment

Radiostrontium can be removed from milk by stirring it with a cation exchange resin saturated with calcium. Successive treatment of milk with the resin will remove 95% of added strontium. Strontium which enters milk via the physiological mechanism is also removed by this process. Treatment of milk with a calcium-saturated resin raises the calcium content and reduces the potassium and sodium content of the milk.Resin that is equilibrated with a solution of CaCl2, KCl, and NaCl which has the same cation proportions as does milk is effective in removing strontium and cesium and does not alter the calcium, potassium, or sodium content of the milk.

Rare-earth elements as tracers of the genetic relationship between smectite and palygorskite in marine phosphorites

Clay Minerals ◽  
1999 ◽  
Vol 34 (3) ◽  
pp. 419-427 ◽  
Author(s):  
A. Chahi ◽  
N. Clauer ◽  
T. Toulkeridis ◽  
M. Bouabdelli
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Genetic Relationship ◽  
Acid Treatment ◽  
Crystallization Process ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Distribution Patterns ◽  
Dilute Acid ◽  
Before And After

AbstractDetrital smectite in a sandy claystone and a phosphorite, and authigenic palygorskite in a dolomitic marl and a porcellanite from Cretaceous-Tertiary phosphorite deposits of the Ganntour Basin (Morocco) were purified using cation exchange resin, leached with dilute acid, and analysed for the contents and distribution patterns of their REE before and after acid treatment. The normalized patterns confirm a detrital origin for the smectite in the sandy claystone, whereas the origin of the smectite from the phosphorite is obscured by the addition of REE from the phosphogenic environment. The normalized REE patterns of the palygorskite suggest formation in non-oxidizing restricted environments. The Al2O3/ΣREE ratio of the two clay types suggests formation of diagenetic palygorskite (and mixed-layer illite-smectite) from Al-bearing detrital smectite by a dissolution-crystallization process.

On the Fast Chemical Separation of Carrier-free Samples from Macro-amounts of Proton-irradiated Rare-Earth Targets

1963 ◽  
Vol 1 (3) ◽  
Author(s):  
G. K. Oelsner-Ryde
Keyword(s):  
Rare Earth ◽  
Cation Exchange ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Chemical Separation ◽  
Rare Earth Oxides ◽  
The Body ◽  
Carrier Free ◽  
Fast Chemical ◽  
Insoluble Salt

SummaryThe formation of precipitates, which appeared in the body of the cation-exchange resin beds during the chemical separation of carrier-free samples from proton-irradiated cyclotron targets of more than 50 mg of rare-earth oxides, is investigated. The properties and character of this insoluble salt are discussed. A method for such a separation, which avoids the disturbing influence of a precipitate, is given. The sample produced is suitable for beta ray spectroscopy. The method described is applicable to fairly short-lived rare-earth isotopes, as the procedure can be carried out within 8 hours.

scholarly journals Liquefaction of Peanut Shells with Cation Exchange Resin and Sulfuric Acid as Dual Catalyst for the Subsequent Synthesis of Rigid Polyurethane Foam

Polymers ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 993 ◽  
Author(s):  
Qinqin Zhang ◽  
Weisheng Chen ◽  
Guojuan Qu ◽  
Xiaoqi Lin ◽  
Dezhi Han ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Cation Exchange ◽  
Exchange Resin ◽  
Raw Materials ◽  
Cation Exchange Resin ◽  
Value Added ◽  
Strong Acid ◽  
Polyurethane Foams ◽  
Uniform Size ◽  
Peanut Shells

The conversion of lignocellulosic biomass from renewable raw materials to high value-added fine chemicals expanded their application in biodegradable polymers materials synthesis, such as polyurethanes and phenolic resin, etc. In this work, the strong-acid cation exchange resin and sulfuric acid as the dual catalyst offered an effective way to catalyze the liquefaction reaction of the peanut shells. The properties of liquefied products were characterized by means of hydroxyl value, viscosity and solubility tests, while the properties of peanut shells and liquefaction residue were analyzed by means of ATR-FTIR, TG and SEM techniques. The results indicated that the liquefied products could be completely dissolved in deionized water, methanol and polyethylene glycol, respectively, and they could be a preferable substitution of petrochemical polyols as soft segments to synthesize the rigid polyurethane foams. Moreover, the cellulose and hemicellulose in the peanut shells were easily decomposed into smaller molecules via the breakage of the C–O bond besides five-membered and hexatomic ring, while the lignin could be degraded via the breakage of the C–O chemical bonds of β-O-4, 4-O-5 and dibenzodioxocin units. The fabricated rigid polyurethane (RPU) foam, containing higher percentage of open pores with uniform size, can be potentially utilized for flower mud and sound-absorbing materials.

REMOVAL OF STRONTIUM AND CESIUM FROM MILK

1959 ◽  
Vol 37 (11) ◽  
pp. 1287-1292 ◽  
Author(s):  
B. B. Migicovsky
Keyword(s):  
Cation Exchange ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Physiological Mechanism ◽  
Calcium Content ◽  
Sodium Content ◽  
Successive Treatment

Radiostrontium can be removed from milk by stirring it with a cation exchange resin saturated with calcium. Successive treatment of milk with the resin will remove 95% of added strontium. Strontium which enters milk via the physiological mechanism is also removed by this process. Treatment of milk with a calcium-saturated resin raises the calcium content and reduces the potassium and sodium content of the milk.Resin that is equilibrated with a solution of CaCl2, KCl, and NaCl which has the same cation proportions as does milk is effective in removing strontium and cesium and does not alter the calcium, potassium, or sodium content of the milk.

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