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Preparation method of carboxyl-terminated hyperbranched polyesteramide collagenous fiber adsorbing material

A hyperbranched polyamide and amino-terminated hyperbranched technology, which is applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, can solve the problems of difficult recovery of precipitation, complicated procedures, and high cost

Active Publication Date: 2013-11-20
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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, but the common presence of Cr(OH) 3 The precipitation is difficult to recover, and flocculant needs to be added, the procedure is complicated, the processing time is long, and the cost is high.

Method used

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  • Preparation method of carboxyl-terminated hyperbranched polyesteramide collagenous fiber adsorbing material

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Embodiment 1

[0020] 1) Preparation of amino-terminated hyperbranched polyamide collagen fibers (HBPN) ([1] Wang Xuechuan, Zhang Feifei, Qiang Taotao. Synthesis and characterization of hyperbranched collagen fiber adsorbents [J]. Functional Materials, 2013, 44, (4) :527~531.);

[0021] 2) Add amino-terminated hyperbranched polyamide collagen fibers into distilled water, stir at room temperature for 0.5 h to disperse evenly, and obtain amino-terminated hyperbranched polyamide collagen fiber dispersion; add 50 mL of amino-terminated hyperbranched polyamide collagen fibers per gram of distilled water ;

[0022] 3) Adjust the pH value of the glyoxylic acid aqueous solution with a mass concentration of 40% to 5.5, then add it to the dispersion of amino-terminated hyperbranched polyamide collagen fibers, and continue the reaction at 0°C for 3.0 hours to obtain a suspension containing the product , filtering the suspension containing the product, and washing the obtained filter cake with normal t...

Embodiment 2

[0024] 1) Preparation of amino-terminated hyperbranched polyamide collagen fibers (CF-HBPN) ([1] Wang Xuechuan, Zhang Feifei, Qiang Taotao. Synthesis and characterization of hyperbranched collagen fiber adsorbents [J]. Functional Materials, 2013, 44, ( 4): 527~531.);

[0025] 2) Add amino-terminated hyperbranched polyamide collagen fibers into distilled water, stir at room temperature for 0.5 h to disperse evenly, and obtain amino-terminated hyperbranched polyamide collagen fiber dispersion; add 100 mL of distilled water per gram of amino-terminated hyperbranched polyamide collagen fibers ;

[0026] 3) Adjust the pH value of the glyoxylic acid aqueous solution with a mass concentration of 40% to 6.5, then add it to the dispersion of amino-terminated hyperbranched polyamide collagen fibers, and continue the reaction at 10°C for 4.0 hours to obtain a suspension containing the product , filtering the suspension containing the product, and washing the obtained filter cake with no...

Embodiment 3

[0028] 1) Preparation of amino-terminated hyperbranched polyamide collagen fibers (CF-HBPN) ([1] Wang Xuechuan, Zhang Feifei, Qiang Taotao. Synthesis and characterization of hyperbranched collagen fiber adsorbents [J]. Functional Materials, 2013, 44, ( 4): 527~531.);

[0029] 2) Add amino-terminated hyperbranched polyamide collagen fibers into distilled water, stir at room temperature for 0.5h to disperse evenly, and obtain amino-terminated hyperbranched polyamide collagen fiber dispersion liquid; add 150mL distilled water to each gram of amino-terminated hyperbranched polyamide collagen fibers ;

[0030] 3) Adjust the pH value of the glyoxylic acid aqueous solution with a mass concentration of 40% to 7.0, then add it to the dispersion of amino-terminated hyperbranched polyamide collagen fibers, and continue the reaction at 20°C for 4.0 hours to obtain a suspension containing the product , filtering the suspension containing the product, and washing the obtained filter cake w...

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Abstract

The invention discloses a preparation method of a carboxyl-terminated hyperbranched polyesteramide collagenous fiber adsorbing material. The preparation method comprises the following steps of: adding carboxyl-terminated hyperbranched polyesteramide collagenous fiber into water, and stirring at normal temperature for uniform dispersion to obtain a carboxyl-terminated hyperbranched polyesteramide collagenous fiber dispersive liquid; then adjusting the pH value of glyoxylic acid aqueous solution to be 5.5-8.0, then adding the glyoxylic acid aqueous solution into the carboxyl-terminated hyperbranched polyesteramide collagenous fiber dispersive liquid, continuously reacting for 3.0-5.0 hours at the temperature of 0-40 DEG C, obtaining turbid liquid containing products, then filtering, drying and grinding a filter cake uniformly to obtain the carboxyl-terminated hyperbranched polyesteramide collagenous fiber adsorbing material. The carboxyl-terminated hyperbranched polyesteramide collagenous fiber adopted by the invention has a large amount of active groups, can be chelated with metal ions and is prepared into the carboxyl-terminated hyperbranched polyesteramide collagenous fiber adsorbing material under the action of a carboxylation reagent; and the carboxyl-terminated hyperbranched polyesteramide collagenous fiber adsorbing material has higher adsorbing performance, wider pH addition range and stronger adaptability to the change of multi-turbidity, alkalinity and the content of organic matters.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a preparation method of carboxyl-terminated hyperbranched polyamide collagen fiber adsorption material. 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% ​​to 75%, that is, 25% to 35% of Cr(III) remains in the waste chrome tanning liquor and cannot be absorbed and fixed by raw hides. The concentration reaches 3~8g / L -1 (in Cr 2 o 3 count), causing serious environmental pollution and waste of chromium metal resources. Cr(III) will be converted to Cr(VI) under the influence of the water environment (pH, redox substances, temperature, etc.), Cr(VI) has carcinogenic and teratogenic effects, and has caused great harm to the human body and organisms in the water. harm. ...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F101/22
Inventor 王学川张斐斐强涛涛席莹
Owner SHAANXI UNIV OF SCI & TECH
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