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High-efficiency adsorption and dearomatization modified activated carbon and preparation method thereof

A technology of activated carbon and modification, which is applied in the direction of chemical instruments and methods, other chemical processes, alkali metal oxides/hydroxides, etc., can solve problems that cannot meet practical applications, and achieve the purpose of improving the selective adsorption of aromatic amino acids by activated carbon, Effect of reducing adsorption loss and improving selectivity

Active Publication Date: 2019-05-10
JIANGNAN UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since most commercial activated carbons are not suitable for practical applications, they need to be modified in different ways for different studies

Method used

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  • High-efficiency adsorption and dearomatization modified activated carbon and preparation method thereof
  • High-efficiency adsorption and dearomatization modified activated carbon and preparation method thereof
  • High-efficiency adsorption and dearomatization modified activated carbon and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Prepare a mixed solution of free amino acids containing leucine, isoleucine, valine, phenylalanine, and tyrosine at a concentration of 5 mmol / L, respectively.

[0036] Preparation of modified activated carbon: HNO with concentrations of 3, 4, 5, 6, 8, 10mol / L 3 Add granular activated carbon to the solution at a carbon-to-liquid ratio (g / mL) of 1:5 and soak for 20 hours, then wash with deionized water to pH 5.0-6.0, and dry in an oven at 105°C to obtain modified activated carbon.

[0037] Add 100g / L activated carbon prepared under the above conditions to the mixed amino acid solution, and adsorb for 2 hours at pH 2.0-3.0, temperature 55°C, and measure the branched chain retention rate and aromatic amino acid removal rate. The results show that (Such as figure 1 ), 3-5mol / L nitric acid solution modified activated carbon can make the branched chain retention rate reach 75-80%, and the aromatic amino acid removal rate reach 97-99%.

Embodiment 2

[0039] The specific embodiment is the same as in Example 1, the difference is that the concentration is divided into 0.05,0.1,0.5,1,5,10mol / L of H 2 SO 4 Solution replacement HNO 3 solution.

[0040] The branched chain retention rate and the aromatic amino acid removal rate of the solution after the modified activated carbon treatment were measured, and the results showed (such as figure 2 ), the concentration is 0.1~10mol / L of H 2 SO 4 Solution modified activated carbon can make the branched chain retention rate reach 70-75%, and the removal rate of aromatic amino acid reach 97-98%.

Embodiment 3

[0042] The specific embodiment is the same as in Example 1, the difference is that HNO is replaced by HCl solutions with concentrations of 0.05, 0.1, 0.5, 1, 5, and 10 mol / L respectively 3 solution.

[0043] The branched chain retention rate and the aromatic amino acid removal rate of the solution after the modified activated carbon treatment were measured, and the results showed (such as image 3 ), the HCl solution with a concentration of 1mol / L has a relatively good effect of modifying activated carbon, which can make the branched chain retention rate reach 58%, and the aromatic amino acid removal rate reach 99%.

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Abstract

The invention discloses a high-efficiency adsorption and dearomatization modified activated carbon and application thereof and belongs to the field of activated carbon preparation. The preparation method of the high-efficiency adsorption and dearomatization modified activated carbon comprises performing cooperative treatment on activated carbon with nitric acid and sulfuric acid and filtering anddrying the treated activated carbon to obtain the modified activated carbon capable of efficiently selectively adsorbing aromatic amino acid. The high-efficiency adsorption and dearomatization modified activated carbon can be well applied to preparing high-Fischer-ratio oligopeptides with more than 20 branched chain amino acids / aromatic amino acids, greatly reduce the adsorption loss when appliedto the branched chain amino acids and meanwhile help obtain oligopeptides with a high Fischer ratio. The preparation method of the high-efficiency adsorption and dearomatization modified activated carbon is simple in operation, mild in treating process and high in modification efficiency.

Description

technical field [0001] The invention relates to a modified activated carbon with high-efficiency adsorption and dearomatization and a preparation method thereof, belonging to the field of activated carbon preparation. Background technique [0002] Activated carbon is a kind of good adsorbent, because of its well-developed pore structure and huge specific surface area, it is widely used in many fields of industrial production. Since most commercial activated carbons cannot meet practical applications, they need to be modified in different ways for different studies. Modification methods include chemical modification and physical modification. Physical modification is to improve the adsorption capacity and adsorption performance by changing the pore structure and specific surface area of ​​activated carbon, mainly including high-temperature calcination and cremation. Chemical modification refers to changing the surface functional groups of activated carbon to meet the select...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30B01J20/28C12P21/06
Inventor 孙付保黎剑徐立华王志翠
Owner JIANGNAN UNIV
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