Synthetic method of collagen hyperbranched polyester/metallic ion loaded fluoride adsorbent

A technology of hyperbranched polyester and collagen, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of large amount of adsorbent, secondary pollution, incomplete adsorption, etc., and achieve cost Inexpensive, easy to recycle, and good reproducibility

Inactive Publication Date: 2014-05-07
SHAANXI UNIV OF SCI & TECH
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Problems solved by technology

[0003] The object of the present invention is to provide a kind of synthetic method of collagen loaded hyperbranched polyester / metal ion fluoride adsorbent, the collagen loaded hyperbranched polyester / metal ion fluoride adsorbent that this method makes can overcome prior art The existing problem of large amount of adsorbent, incomplete adsorption, and easy to produce secondary pollution

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  • Synthetic method of collagen hyperbranched polyester/metallic ion loaded fluoride adsorbent

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preparation example Construction

[0023] The synthesis method of the collagen-loaded hyperbranched polyester / metal ion fluoride adsorbent of the present invention includes the following steps:

[0024] 1) Synthesis of loaded hyperbranched polyester collagen

[0025] 1.1) Dissolve the hydroxyl-terminated hyperbranched polyester in a hydrophilic organic solvent, and then add a crosslinking agent to it, wherein the molar ratio of the hydroxyl-terminated hyperbranched polyester to the crosslinking agent is (8~32): 1. Adjust the pH to 4.5~10, and then react at 30~50℃ for 1.5~3h; among them, the hydroxyl-terminated hyperbranched polyester is Boltorn H20, Boltorn H30 or Boltorn H40. Boltorn H20 is the only one that has reached the pilot scale in the world. The hyperbranched polyester produced is a second-generation hyperbranched polyester synthesized by the "divergent method" using ethoxylated pentaerythritol and dimethylolpropionic acid as raw materials. Its theoretical molecular terminal hydroxyl number is 16, and its r...

Embodiment 1

[0034] 1) Synthesis of loaded hyperbranched polyester collagen

[0035] 1.1) Dissolve Boltorn H20 in 10 mL of dimethyl sulfoxide (DMSO), add epichlorohydrin, and the molar ratio of hydroxyl to epichlorohydrin on the surface of the hydroxyl-terminated hyperbranched polyester is 8:1, by dropping 1 mol / L NaOH solution to adjust the system pH to 10, react at 30°C for 2h;

[0036] 1.2) After the reaction, rinse with deionized water until no epoxy groups are detected in the cleaning solution;

[0037] 1.3) Wash the collagen with 10%, 30%, 50% DMSO aqueous solution, and vacuum the cleaning solution after each cleaning. According to the molar ratio of the amino groups on the collagen surface to the epichlorohydrin is about 0.8:1, add DMSO to the clean collagen to prepare a collagen suspension, and add Boltorn H20 activated by epichlorohydrin to the collagen suspension In the liquid. The reaction system was heated to 50°C and reacted for 18 hours under sealed conditions. The product obtai...

Embodiment 2

[0041] 1) Synthesis of loaded hyperbranched polyester collagen

[0042] 1.1) Dissolve Boltorn H30 in 10 mL of N,N-dimethylformamide (DMF), add divinyl sulfone, and the molar ratio of the hydroxyl-terminated hyperbranched polyester surface to the crosslinking agent is 16:1. Add 0.5mol / L HCl solution to adjust the pH of the system to 4.5, and react at 40℃ for 2h;

[0043] 1.2) After the reaction, rinse with deionized water until no divinyl sulfoxide is detected in the cleaning solution;

[0044] 1.3) Wash the collagen with 10%, 30%, 50% DMF aqueous solution, and vacuum the cleaning solution after each cleaning. According to the molar ratio of the amino groups on the collagen surface to the divinyl sulfoxide of about 1:1, add DMF to the clean collagen to prepare a collagen suspension, and add Boltorn H30 activated by divinyl sulfoxide to the collagen Protein suspension. The reaction system was heated to 60°C and reacted for 15 hours under sealed conditions. The product obtained was w...

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Abstract

The invention discloses a synthetic method of a collagen hyperbranched polyester/metallic ion loaded fluoride adsorbent. The synthetic method is characterized in that terminal hydroxyl hyperbranched polyester is grafted to collagen under the effect of a cross-linking agent to increase the content of surface active group in collagen; the prepared hyperbranched polyester loaded collagen is complexed with metallic ion; and then the complexed and hyperbranched polyester/metallic ion loaded collagen can be utilized for treating fluoride-containing wastewater. The synthetic method is simple, and industrial production is easy to realize; the prepared product shows high selectivity for the fluoride in an aqueous solution and can perform complete adsorption; the collagen of the waste leather in tanning process can be used for treating the fluoride-containing wastewater after being modified, so that the purposes of treating sewage with waste and maximizing the economic benefit can be reached.

Description

Technical field [0001] The invention belongs to the technical field of fluorine-containing wastewater treatment, and specifically relates to a method for synthesizing a collagen-loaded hyperbranched polyester / metal ion fluoride adsorbent. Background technique [0002] Fluoride ions are widely present in the earth’s water bodies. The main sources of fluoride pollution in the environment are steel, aluminum, chemicals, phosphate fertilizers, glass, ceramics, fluorine chemicals, bricks and tiles, and other industries that emit fluorine in the process of burning coal. ". The fluorine-containing "three wastes" discharged in the industrial process mainly use cryolite (Na 3 AlF 6 ), fluorite (CaF 2 ), phosphate rock (3Ca (PO 4 ) 2 CaF 2 ) And HF corporate emissions. In recent years, groundwater fluorine pollution has gradually become a worldwide problem and has attracted attention. The fluoride content in drinking water in many countries and regions in the world exceeds the standards ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28
Inventor 王学川张斐斐强涛涛
Owner SHAANXI UNIV OF SCI & TECH
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