一种新型的腐植酸系水煤浆分散剂的制备及性质研究

实验采用直接酯化法,以马来酸酐和聚乙二醇600先酯化合成酯化单体,再以腐殖酸、甲基丙烯酰氧乙基三甲基氯化铵和酯化单体为原料,以过硫酸钾为引发剂,采用水溶液自由基接枝共聚原理,合成出了一种新型的两性离子型腐殖酸分散剂(HDM)。通过红外光谱对接枝共聚产物的分子结构进行了表征。将其作用于榆林煤制浆,考察了单体配比、引发剂用量、反应温度等对水煤浆性能的影响。最佳工艺条件为:m(MAPEG-600)/m(HA)=2.5:1,引发剂KPS用量为HA和MAPEG-600总质量的6.0%。结果表明,HDM相较于市售的木质素磺酸钠有更好的稳定性。

Preparation and Properties of a New Type of Humic Acid-based Coal Water Slurry Dispersant

this experiment adopts the direct esterification method, with maleic anhydride and polyethylene glycol 600 through esterification esterification monomer first, again with humic acid, methyl acryloyl oxygen ethyl trimethyl ammonium chloride and esterification monomer as raw materials, with potassium persulfate as initiator, using water solution free radical graft copolymerization principle, create a new kind of amphoteric ionic humic acid dispersant(HDM). The molecular structure of the copolymer was represented by the infrared spectra. The effects of monomer ratio, dosage of initiator and reaction temperature on the properties of the coal pulp were investigated. The optimum process condition is: m(map-600)/m(HA) = 2.5:1, the amount of KPS is 6.0% of the total mass of HA and map-600. The results showed that the HDM had better stability than the lignin sodium sulfonate.