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Preparation method of modified collagen fiber adsorbing material

A collagen fiber and adsorption material technology, which is applied in the field of preparation of modified collagen fiber adsorption materials, can solve the problems of difficult recovery, complicated procedures and high cost, and achieve the effects of no secondary pollution, high adsorption efficiency and strong adsorption performance.

Inactive Publication Date: 2013-08-28
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current method of treating chromium-containing wastewater mainly includes the method of adding alkali to precipitate and recover. Adjusting the appropriate pH is the key to controlling the concentration of chromium in the waste liquid. At present, the most commonly used precipitants for chromium precipitation in tannery are MgO, NaOH and Ca(OH) 2 , but the ubiquitous Cr(OH) 3 Precipitation is difficult to recover, and flocculant needs to be added, the procedure is complicated and the cost is high

Method used

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  • Preparation method of modified collagen fiber adsorbing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Step 1: Preparation of Collagen Fibers

[0022] Collagen fibers are obtained by drying hides and skins after acid treatment, enzyme treatment, alkali treatment, dealkalization, and dehydration (see the preparation and performance characterization of pigskin acid-relaxed collagen fibers, Volume 39, Issue 3, May 2007);

[0023] Step 2: Preparation of hyperbranched polyamidoamine

[0024] The acetone solution of triethylenetetramine and vinyl acetate was reacted at room temperature for 4 hours, and then the temperature was raised to 130° C. to continue the reaction for 3 hours. Remove acetone under reduced pressure and vacuum at 60°C, extract and wash the crude product with acetone, and dry at 60°C to constant weight to obtain hyperbranched polyamidoamine;

[0025] Step 3: Weigh the hyperbranched polyamidoamine, collagen fibers and crosslinking agent glutaraldehyde at a molar ratio of 1:1:0.8, add 50 mL of water per mole of collagen fibers to add the collagen fibers to a ...

Embodiment 2

[0027] Step 1: Preparation of Collagen Fibers

[0028] Collagen fibers are obtained by drying hides and skins after acid treatment, enzyme treatment, alkali treatment, dealkalization, and dehydration (see the preparation and performance characterization of pigskin acid-relaxed collagen fibers, Volume 39, Issue 3, May 2007);

[0029] Step 2: Preparation of hyperbranched polyamidoamine

[0030] Ethylenediamine and ethyl ether solution of vinyl propionate were reacted at room temperature for 5 hours, then the temperature was raised to 150°C and the reaction was continued for 4 hours. Ether was removed under reduced pressure at 80°C, the crude product was extracted and washed with acetone, and then dried at 60°C to constant weight to obtain hyperbranched polyamidoamine;

[0031] Step 3: Weigh the hyperbranched polyamidoamine, collagen fibers and crosslinking agent glyoxal at a molar ratio of 1:1:0.5, add 200 mL of water per mole of collagen fibers to add the collagen fibers to a ...

Embodiment 3

[0033] Step 1: Preparation of Collagen Fibers

[0034] Collagen fibers are obtained by drying hides and skins after acid treatment, enzyme treatment, alkali treatment, dealkalization, and dehydration (see the preparation and performance characterization of pigskin acid-relaxed collagen fibers, Volume 39, Issue 3, May 2007);

[0035] Step 2: Preparation of hyperbranched polyamidoamine

[0036] 1,3-Propanediamine and chloroform solution of isopropenyl acetate were reacted at room temperature for 4 hours, and then the temperature was raised to 140° C. to continue the reaction for 3 hours. The chloroform was removed under reduced pressure at 100°C, the crude product was extracted and washed with acetone, and then dried at 60°C to constant weight to obtain hyperbranched polyamidoamine;

[0037] Step 3: Weigh the hyperbranched polyamidoamine, collagen fibers and crosslinking agent carbodiimide at a molar ratio of 1:1:1.0, add 150 mL of water per mole of collagen fibers, and add the...

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Abstract

The invention relates to a preparation method of a modified collagen fiber adsorbing material, aiming at solving the problems that the adsorption is not thorough and the usage quantity is large in the prior art. In order to solve the problems in the prior art, the technical scheme of the preparation method is as follows: the adsorbing material is prepared by using collagen fibers as a raw material, and the preparation process sequentially comprises the following steps: step 1, preparing the collagen fibers; step 2, preparing hyperbranched polyamidoamine; and step 3, interlinking hyperbranchedpolyamidoamine on the collagen fibers, carrying out amino derivatization modification on the callogen fibers so as to prepare the modified collagen fiber adsorbing material. The adsorbing material can be used for treating wastewater containing Cr(III) in leather, metallurgy, electroplating and other industries, is non-toxic, environment-friendly and biodegradable, has no potential safety hazards and is low in cost.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a preparation method of a modified collagen fiber adsorption material used for treating waste water containing Cr(III). Background technique [0002] The biggest pollution in the tanning industry is the Cr(III)-containing wastewater generated during the chrome tanning process. The absorption rate of chromium in the traditional chrome tanning process is only 65-75%, that is, 25-35% of Cr(III) remains in the waste tanning liquid and cannot be absorbed and fixed by raw hides, and the concentration of Cr(III) in the waste liquid reaches 3 -8g / L -1 (in Cr 2 o 3 ), resulting in serious environmental pollution and waste of resources. Cr(III) will be converted into Cr(VI) under certain conditions, and Cr(VI) has carcinogenic effect on human body. Therefore, how to effectively treat Cr(III) in tanning chrome tanning waste liquor is very important. The current met...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F101/22
Inventor 王学川张斐斐强涛涛
Owner SHAANXI UNIV OF SCI & TECH
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