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Modified corn shell adsorbent for adsorbing gold ions, and preparation method and application of adsorbent

A corn husk, gold ion technology, applied in the direction of ion exchange, selective adsorption, ion exchange regeneration, etc., can solve the problem of not using corn husk gold ions, and achieve good application and economic value, high adsorption rate, and cheap raw materials. Effect

Active Publication Date: 2018-06-15
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there is no use of corn husk as an adsorbent for gold ions.

Method used

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  • Modified corn shell adsorbent for adsorbing gold ions, and preparation method and application of adsorbent
  • Modified corn shell adsorbent for adsorbing gold ions, and preparation method and application of adsorbent
  • Modified corn shell adsorbent for adsorbing gold ions, and preparation method and application of adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: A kind of preparation method of the modified corn husk adsorbent that is used to adsorb gold ion, concrete steps are as follows:

[0027] (1) Dry and crush the corn husks, then add them to concentrated sulfuric acid, react and carbonize for 15 hours at a temperature of 90°C under stirring conditions, wash the reaction product with water until neutral, dry and grind to obtain the product CCB; The liquid-solid ratio mL:g of corn husk is 5:1;

[0028] (2) Add the product CCB and chloroacetyl chloride obtained in step (1) into N,N-dimethylformamide, react at a temperature of 100°C for 24 hours under stirring conditions, and then sequentially use N,N-dimethylformamide formamide, distilled water washing, solid-liquid separation, and vacuum drying the solid to obtain the product CC-CCB; wherein the liquid-solid ratio of N,N-dimethylformamide to the product CCB mL:g is 8:1, chloroacetyl chloride and N, The volume ratio of N-dimethylformamide is 8:1; the specific ...

Embodiment 2

[0035] Embodiment 2: a kind of preparation method of the modified corn husk adsorbent that is used to adsorb gold ion, concrete steps are as follows:

[0036] (1) Dry and crush the corn husks, then add them to concentrated sulfuric acid, react and carbonize for 24 hours at a temperature of 80°C under stirring conditions, wash the reaction product with water to neutrality, dry and grind to obtain the product CCB; the concentrated sulfuric acid The liquid-solid ratio mL:g of corn husk is 8:1;

[0037] (2) Add the product CCB and chloroacetyl chloride obtained in step (1) into N,N-dimethylformamide, react for 10 hours at a temperature of 110°C under stirring conditions, and then sequentially use N,N-dimethylformamide formamide, distilled water washing, solid-liquid separation, and vacuum drying the solid to obtain the product CC-CCB; wherein the liquid-solid ratio of N,N-dimethylformamide to the product CCB mL:g is 11:1, chloroacetyl chloride and N, The volume ratio of N-dimethy...

Embodiment 3

[0043] Embodiment 3: a kind of preparation method of the modified corn husk adsorbent that is used to adsorb gold ion, concrete steps are as follows:

[0044] (1) Dry and crush the corn husks, then add them to concentrated sulfuric acid, react and carbonize for 10 hours at a temperature of 100°C under stirring conditions, wash the reaction product with water to neutrality, dry and grind to obtain the product CCB; the concentrated sulfuric acid The liquid-solid ratio mL:g of corn husk is 10:1;

[0045] (2) Add the product CCB and chloroacetyl chloride obtained in step (1) to N,N-dimethylformamide, react at a temperature of 90°C for 16 hours under stirring conditions, and then sequentially use N,N-dimethylformamide formamide, distilled water washing, solid-liquid separation, and vacuum drying the solid to obtain the product CC-CCB; wherein the liquid-solid ratio of N,N-dimethylformamide to the product CCB mL:g is 15:1, and chloroacetyl chloride and N, The volume ratio of N-dime...

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Abstract

The invention relates to a modified corn shell adsorbent for adsorbing gold ions, and a preparation method and application of the adsorbent, and belongs to the technical field of adsorbent preparation. The preparation method comprises the following steps: drying and crushing corn shells, adding the crushed corn shells into concentrated sulfuric acid, carrying out a reaction for carbonization undera stirring condition for 10-24 hours at a temperature of 80-100 DEG C, washing the obtained reaction product with water to a neutral state, and carrying out drying and grinding to obtain a product CCB; adding the product CCB and chloroacetyl chloride to N,N-dimethyl formamide, carrying out a reaction under a stirring condition for 10-24 hours at a temperature of 90-110 DEG C, then sequentially carrying out washing with N,N-dimethyl formamide and distilled water, carrying out solid-liquid separation, and carrying out vacuum drying on a solid to obtain a product CC-CCB, adding the product CC-CCB, potassium carbonate and 2-aminothiazole into a tetrahydrofuran solution, carrying out a reaction under a stirring condition for 10-24 hours at a temperature of 80-100 DEG C, then sequentially carrying out washing with tetrahydrofuran and distilled water, carrying out solid-liquid separation, and carrying out vacuum drying on a solid to obtain the modified corn shell adsorbent for adsorbing goldions, wherein the adsorbent is marked as AT-CCB. The modified corn shell adsorbent provided by the invention can be used for adsorbing gold ions.

Description

technical field [0001] The invention relates to a modified corn husk adsorbent for adsorbing gold ions, a preparation method and application thereof, and belongs to the technical field of adsorbent preparation. Background technique [0002] Corn husk is a kind of agricultural and forestry waste. During the harvest season, it is usually destroyed by incineration, which causes a serious waste of resources and brings great pollution to the environment. Gold is a precious metal that can be used in catalysts, alloys, electroplating and various contact materials. It has unique physical and chemical properties and is widely used in many fields such as microelectronics technology, chemical industry, aviation manufacturing, and metallurgical industry. Petrochemical, environmental science, electrical engineering, national defense and other cutting-edge science and modern industry play a key and central role. Gold in nature is usually low grade and associated with other elements. Wit...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30B01D15/08
CPCB01D15/08B01J20/24B01J2220/4806B01J2220/4812B01J2220/4825
Inventor 张利波林国王仕兴胡途杨黎彭金辉付立康
Owner KUNMING UNIV OF SCI & TECH
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