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Method for preparing uranium adsorption material with intercalation structure by use of oil shale ash as raw material

A technology for oil shale ash and adsorption materials, which is applied in chemical instruments and methods, removal of solid waste, alkali metal oxides/hydroxides, etc. , the problem of high production cost, to achieve the effect of promoting healthy development, reducing production cost, and low preparation cost

Active Publication Date: 2015-02-25
哈尔滨海能拓科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are still some deficiencies in the above studies that need to be improved: the use of metal ions is single, the comprehensive utilization of various metal ions in oil shale ash has not been realized, and there is still a large amount of industrial waste liquid containing other metal ions produced during the processing process. Environmental Pollution
However, the disadvantages are mainly concentrated in the high production cost of using chemical reagents as raw materials

Method used

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  • Method for preparing uranium adsorption material with intercalation structure by use of oil shale ash as raw material
  • Method for preparing uranium adsorption material with intercalation structure by use of oil shale ash as raw material
  • Method for preparing uranium adsorption material with intercalation structure by use of oil shale ash as raw material

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Experimental program
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Effect test

Embodiment 1

[0028] (1) Crush and grind oil shale ash to 100 mesh, take 10g and add 4-6g NaCl, calcinate for 3-5h at 1000-1400K, air-dry, 20-200ml 30% H 2 SO 4 , heated to 353K to extract metal ions, 3-10h, separate the extract and residue, extract Al 3+ , Fe 3+ , Mg 2+ 、Ti 4+ , Ca 2+ and other metal ions;

[0029] (2) Add Mg(NO 3 ) 2Adjust the ratio of the total moles of trivalent and tetravalent metal ions to the total moles of divalent metal ions in the solution to 1:5-1:2, adjust the pH of the solution with NaOH=7-12, and stir at 353K for 600min;

[0030] (3) The intercalation material is obtained by filtering and drying;

[0031] (4) The filtrate can be recrystallized until the by-product Na 2 SO 4 ;

[0032] (5) Under the condition of pH=4 and 318K, the uranium adsorption capacity is 105mg / g.

Embodiment 2

[0034] The preparation method of the uranium adsorption material in Example 2 is basically the same as that in Example 1, except that in step (1), the oil shale slag is pulverized and ground to 100 mesh, and 10 g is added with 5 g of NaCl, and calcined for 5 h under the condition of 1223 K, Air-dried, 200ml 30%H 2 SO 4 , heated to 353K to extract metal ions, vigorously stirred for 8h, and the leaching solution and residue were separated; in step (5), under pH=4, 318K, the uranium adsorption capacity was 113mg / g.

Embodiment 3

[0036] The preparation method of the uranium adsorption material in Example 3 is basically the same as that in Example 2, with the difference that: step (2) adds Mg(NO) to the leaching solution 3 ) 2 Adjust the ratio of the total moles of trivalent and tetravalent metal ions to the total moles of divalent metal ions in the solution to be 1:2, adjust the pH of the solution with NaOH=11, and stir at 353K for 600 min; step (5) at pH=4, Under the condition of 318K, the uranium adsorption capacity is 168mg / g.

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Abstract

The invention provides a method for preparing a uranium adsorption material with an intercalation structure by use of oil shale ash as a raw material. The method comprises the following steps: crushing and grinding the oil shale ash to 100 meshes, adding NaCl accounting for 30 to 60% of oil shale ash by mass, and calcining for 3 to 10 hours at a temperature of 800 to 1400 K and air drying; adding an acid solution by 2 to 20 mL per gram of the oil shale ash, and after extraction, carrying out residue separation to obtain an extraction solution; through a method of adding metal ions, adjusting the ratio of the total mole amount of three-valent and four-valent matal ions to the total mole amount of divalent metal ions in the extraction solution to be 1:5-1:2, adjusting the pH of the solution to be 5-12, and further stirring for 10 to 1000 min or hrdro heating for 120 to 3600 min by transferring to a hydro-thermal kettle at a temperature of 373 to 433 K; and filtering, washing and drying to obtain the uranium adsorption material with the intercalation structure. The preparation method provided by the invention is simple in preparation technology and low in production cost, and is free from the restrictions of chemical composition differences of the oil shale ash, thereby facilitating the harmlessness, resource and functionalization utilization of industrial waste, i.e, the oil shale ash.

Description

technical field [0001] The invention relates to a method for preparing uranium adsorption materials, in particular to a method for preparing radioactive waste liquid treatment materials from industrial waste after oil shale processing. Background technique [0002] Energy and the environment have become two major themes in the development of the world today. Oil shale has huge reserves and is generally considered to be an important alternative energy source for oil and natural gas. However, due to the high ash content of oil shale, oil shale ash is the most important by-product in the process of processing and utilization. Stacking ash not only takes up a lot of land, but also causes serious environmental pollution. The realization of harmless, resourceful and functional application of oil shale ash will play a positive role in promoting the rapid development of my country's oil shale industry. [0003] The main component of oil shale ash is SiO 2 、A1 2 o 3 , Fe 2 o 3...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/08B01J20/28B01J20/30B09B3/00
Inventor 王君张宏森张斌李松南刘琦刘婧媛宋大雷高赞邹继龙
Owner 哈尔滨海能拓科技发展有限公司
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