A method for measuring the cation exchange capacity of weathering crust elution type rare earth ores

A weathering crust elution type, cation exchange technology, applied in the direction of measuring devices, material separation, instruments, etc., can solve the problems of low accuracy of measurement results and high requirements for cleanliness, and achieve good analysis accuracy and repeatability, The effect of simple operation device and low cost

Inactive Publication Date: 2011-12-21
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires to ensure that the adsorption of medicament cations in the raw ore is a single-layer adsorption, and at the same time requires a high degree of washing of the raw ore to minimize the physical adsorption of the medicament, but in fact both physical adsorption and multi-layer adsorption of the medicament in the raw ore will occur, making The accuracy of the measurement results is not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Dingnan Rare Earth Mine in Jiangxi was dried, 2.9992g and 3.0004g of ore samples were weighed twice, and 50 mL of neutral ammonium acetate solution with a concentration of 1.0 mol / L was added, stirred evenly, and the solid and liquid were separated, and the supernatant was discarded. Repeat the treatment of the ore sample 6 times; then add 40 mL of distilled water to wash away the residual ammonium acetate solution in the ore sample, separate the solid and liquid, discard the supernatant, and repeat the washing 4 times; add a small amount of distilled water to the processed ore sample, Stir evenly, and transfer to a 150 mL Kjeldahl bottle, the volume of distilled water is 60 mL, then add 1.0 g of solid magnesium oxide and 2.0 mL of liquid paraffin for distillation, and absorb the distilled ammonia with 30.0 mL of boric acid indicator solution, and wait for distillation After the total volume of the liquid reaches 160 mL, check with Na's reagent until there is no yellow r...

Embodiment 2

[0044] Fujian Ninghua rare earth mine was dried, and the ore samples 2.9974 g and 3.0136 g were weighed twice, and 40 mL of neutral ammonium acetate solution with a concentration of 2.0 mol / L was added, stirred evenly, and the solid and liquid were separated, and the supernatant was discarded. Repeat the treatment of the ore sample 5 times; then add 50 mL of distilled water to wash away the residual ammonium acetate solution in the ore sample, separate the solid and liquid, discard the supernatant, and repeat the washing 6 times; add a small amount of distilled water to the processed ore sample, Stir evenly, and transfer to a 150 mL Kjeldahl bottle, the volume of distilled water is 80 mL, then add 2.0 g of solid magnesium oxide and 4.0 mL of liquid paraffin for distillation, the distilled ammonia is absorbed with 28.0 mL of boric acid indicator solution, and then distilled After the total volume of the liquid reaches 154 mL, check with Na's reagent until there is no yellow reac...

Embodiment 3

[0047] Jiangxi Longnan Rare Earth Mine was dried, weighed 4.0015 g and 3.9981 g ore twice, added 60 mL of neutral ammonium acetate solution with a concentration of 1.0 mol / L, stirred evenly, separated the solid and liquid, discarded the supernatant, and repeated Process the ore sample 6 times; then add 50 mL of distilled water to wash away the residual ammonium acetate solution in the ore sample, separate the solid from the liquid, discard the supernatant, and repeat the washing 5 times; add a small amount of distilled water to the processed ore sample, and stir evenly , and transferred to a 150 mL Kjeldahl bottle, the volume of distilled water is 65 mL, then add 1.5 g solid magnesium oxide and 2.5 mL liquid paraffin for distillation, the distilled ammonia is absorbed with 25.0 mL boric acid indicator solution, and the distillate After the total volume reaches 158 mL, check with Na's reagent until there is no yellow reaction; respectively pipette 25.90 mL and 25.48 mL of distil...

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Abstract

The invention relates to a method for measuring the cation exchange capacity of a weathered crust illuviation rare earth ore. The method comprises the following steps of: (1) drying: drying a weathered crust illuviation rare earth ore sample; (2) exchanging and eluting; (3) distilling and absorbing ammonium; (4) measuring the ammonium; and (5) calculating the cation exchange capacity of the weathered crust illuviation rare earth ore sample according to a calculation formula. The invention has the beneficial effects that: the defect of the conventional measurement of the cation exchange capacity of a weathered crust illuviation rare earth ore is overcome, the method is suitable for measuring the cation exchange capacities of various weathered crust illuviation rare earth ores, an operationdevice is simple, the cost is low, and high analysis accuracy and repeatability are achieved.

Description

technical field [0001] The invention relates to a method for measuring the cation exchange capacity of weathering crust leaching type rare earth ores, and belongs to the field of analyzing weathering crust leaching type rare earth ores by ion exchange. Background technique [0002] The weathering crust elution-type rare earth ore can be used as a special inorganic exchange resin loaded with rare earth ions and impurity ions by clay minerals. In rare earth clay ores, clay minerals such as halloysite, kaolinite, illite and a small amount of montmorillonite are mainly used to adsorb cations. They have a layered structure, the particle size is about 2 μm, the specific surface area is large, and the adsorption capacity is strong. In clay minerals, cations are mainly adsorbed on the active center of the substitution structure, or on the active center of the residual bond on the fracture surface. The more clay minerals, the more active sites for adsorption, and the larger the amo...

Claims

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Application Information

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IPC IPC(8): G01N30/00
Inventor 李慧周芳池汝安
Owner WUHAN INSTITUTE OF TECHNOLOGY
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