3033-77-0Relevant articles and documents
Preparation and flocculation performance study of a novel amphoteric alginate flocculant
Ni, Caihua,Sang, Xinxin,Shi, Gang,Tian, Zhenle,Zhang, Liping
, (2020)
Sodium alginate is a natural biomacromolecule with promising applications as a flocculant for wastewater treatment due to its biodegradability and non-toxicity. To enhance the flocculating efficiency, simplify the synthetic process of the flocculants and expand the application scope of alginate, a novel amphoteric flocculant was synthesized through reaction of alginate with 3-chloro-2-hydroxypropyltrimethyl ammonium chloride under alkaline conditions. The structures of the flocculants were characterized using various methods. The flocculants demonstrated nanoparticle sizes with a narrow distribution. The amphoteric flocculant could not only effectively remove the positively-charged Pb2+ from wastewater, but also removed the negatively-charged humic acid. Under optimum conditions, the removal rates reached 92.32% and 95.18% for Pb2+ and humic acid, respectively. Compared with unmodified alginate, the amphoteric flocculant had significantly improved flocculation for the heavy metal ions and negatively-charged pollutants. The flocculating mechanism for heavy metals was chelating, and was confirmed by X-ray photoelectron spectroscopy, and the flocculating mechanism for humic acid was electric neutralization. The adsorption isotherm could be described by a Langmuir model. The flocculation process accorded with quasi-second-order kinetics equation. This novel amphoteric flocculant has promising applications as an environmentally-friendly treatment agent for wastewater.
Positive ion reactive dye containing polyether amine chain segments and preparation method of positive ion reactive dye
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Paragraph 0050; 0051; 0117; 0118, (2016/10/10)
The invention relates to positive ion reactive dye containing polyether amine chain segments and a preparation method of the positive ion reactive dye and belongs to the fields of dye chemical engineering and textile printing and dyeing.The preparation method of the positive ion reactive dye containing the polyether amine chain segments comprises the steps of selecting a compound of an amino-anthraquinone-containing structure as a color body, making the compound react with 1, 3, 5-trichloro-triazine to generate a dichloro-triazine compound, and then making the dichloro-triazine compound react with various types of polyether amine, so that an intermediate body containing monochloro-triazine-based polyether amine is generated; dropwise adding a glycidyl quaternary ammonium salt compound to the intermediate body containing monochloro-triazine-based polyether amine, so that the positive ion reactive dye containing the polyether amine chain segments is generated.The positive ion reactive dye containing the polyether amine chain segments is novel in structure, the preparation condition is mild, raw materials are easy to obtain, little pollution is caused, a product is high in yield and purity, and the dye can be applied to salt-free dyeing of cotton fabric.
POLYCATIONIC POLYHYDROXYL COMPOUNDS
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Paragraph 0031; 0032; 0033; 0034, (2015/03/16)
Described are novel polycationic polyhydroxyl compounds and their uses in personal care compositions.