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Cross-link polyamino acid type metal adsorbent, method for preparing same and method for adsorbing metal

A polyamino acid, amino acid type technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., to achieve good environmental protection effects

Active Publication Date: 2017-06-13
长春鑫螯科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The application of amino acid hydrogels in the field of metal adsorbents has not been reported so far

Method used

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  • Cross-link polyamino acid type metal adsorbent, method for preparing same and method for adsorbing metal
  • Cross-link polyamino acid type metal adsorbent, method for preparing same and method for adsorbing metal
  • Cross-link polyamino acid type metal adsorbent, method for preparing same and method for adsorbing metal

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preparation example Construction

[0052] The present invention also provides a method for preparing a cross-linked polyamino acid metal adsorbent, comprising the following steps:

[0053] Perform polycondensation reaction of one or more amino acids with a cross-linking agent with a functionality ≥ 2 to obtain a cross-linked polyamino acid;

[0054] Or carry out a cross-linking reaction between a straight-chain polyamino acid and a cross-linking agent with a functionality ≥ 2 to obtain a cross-linked polyamino acid;

[0055] Or carry out a crosslinking reaction between branched polyamino acid and a crosslinking agent with a functionality ≥ 2 to obtain crosslinked polyamino acid;

[0056] Or carry out a crosslinking reaction with a mixture of linear polyamino acid and branched polyamino acid and a crosslinking agent with a functionality ≥ 2 to obtain a crosslinked polyamino acid.

[0057] In the present invention, the content of the cross-linking agent with functionality ≥ 2 is X, where 0%

Embodiment 1

[0081] To prepare hyperbranched polylysine, add 100 grams of lysine to a 500-milliliter round-bottomed flask equipped with a Dean-Stock trap, heat to 180° C. and stir for 12 hours, then vacuumize for 10 hours. The reaction system was cooled to room temperature to obtain 89 grams of hyperbranched polylysine.

Embodiment 2

[0083] For the preparation of polyglutamic acid, add 59g of ground L-glutamic acid and 52mL of benzyl alcohol into a 500mL three-necked bottle, after mechanically stirring evenly, slowly add 48mL of 60% concentrated sulfuric acid dropwise with a constant pressure dropping funnel, The temperature of the oil bath was controlled at 70°C until the reaction solution became clear. Heating was stopped, and after the reaction solution dropped to normal temperature, it was added to 65 g of sodium bicarbonate in ice water. After filtration, the crude product was recrystallized with distilled water at 70°C to obtain flaky crystals, washed with ethanol and ether in sequence, and dried in vacuum to obtain the white product γ-benzyl-L-glutamic acid.

[0084] Add 10g of γ-benzyl-L-glutamic acid into 100mL of anhydrous tetrahydrofuran, add 5g of triphosgene while stirring, and react in an oil bath at 50-60°C for 3 hours. Hydrogen chloride gas. After the solution was clarified, the heating w...

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Abstract

The invention provides a cross-link polyamino acid type metal adsorbent, a method for preparing the same and a method for adsorbing metal, and belongs to the field of technologies for adsorbing metal. The cross-link polyamino acid type metal adsorbent structurally comprises one or two types of linear (I) and branching (II) constitutional units and cross-linking agents with the functionality higher than or equal to 2. The constitutional units and the cross-linking agents are coupled with one another to obtain the cross-link polyamino acid type metal adsorbent. The corresponding method is used for adsorbing the metal by the aid of the cross-link polyamino acid type metal adsorbent. The cross-link polyamino acid type metal adsorbent and the methods have the advantages that cross-link polyamino acid contains a type or a plurality of types of massive amino, hydroxyl, carboxyl, sulfhydryl, guanidyl, acylamino, phenolic hydroxyl and imidazole groups, and accordingly the metal can be adsorbed by cross-link polyamino acid; amino acid is a renewable resource, accordingly, dependence on petroleum products can be prevented, and the cross-link polyamino acid type metal adsorbent is non-toxic and is free of pollution and good in environmental friendliness.

Description

technical field [0001] The invention relates to the technical field of metal adsorption, in particular to a cross-linked polyamino acid type metal adsorbent, a preparation method and a method for adsorbing metal. Background technique [0002] In recent years, people have become more and more aware of the importance of the ecological environment. With the vigorous implementation of my country's energy-saving and emission-reduction policies, the demand for wastewater treatment technology and related equipment has been greatly stimulated. Wastewater treatment has a broad market prospect. Research and development of low-cost and high-efficiency wastewater treatment technology to meet the needs of industrial production and solve water pollution problems has become a key scientific and technological issue that urgently needs to be solved in the process of national economic and social development in our country. . In the process of sewage treatment, the removal of metals is very i...

Claims

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Application Information

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IPC IPC(8): C08G69/48C08G69/08C08J3/24B01J20/30B01J20/26C02F1/28C02F101/20
CPCB01J20/26C02F1/285C02F2101/20C08G69/08C08G69/48C08J3/24C08J2377/02
Inventor 刘亚栋季生象刘菁
Owner 长春鑫螯科技有限公司
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