马来海松酸醇酰胺的合成及其对神华煤分散作用的研究

Synthesis of Coal-Water Slurry dispersant based on Maleopimaric acid diethanolamine and the effects on surface of Shen Hua coal

摘要:

以松香为原料，与顺丁烯二酸酐加成，再经二乙醇胺改性得到一种多元环状结构的马来海松酸醇酰胺水煤浆分散剂。分散剂含有多个醇酰胺链段，能使水很快润湿煤表面。结合水煤浆在不同浓度、pH、转速等条件下的流变行为和Zeta电位，讨论了分散剂对陕西神华煤成浆性的影响，初步探讨了该分散剂与煤粒的作用机理。研究认为分散剂加入后，以疏水基团与煤表面相连，亲水基团与水相连，并通过亲水链段的空间位阻效应，有效阻隔了煤粒间的聚集，使煤粒得到均匀分散，达到了降低水煤浆粘度，提高稳定性的作用。

Abstract:

This paper focused on the preparation of a dispersant which takes rosin as raw material, then adds maleic anhydride and finally applies diethanolameine to modify to get the Maleopimaric acid diethanolamine dispersant that was used in coal water slurry (CWS). This dispersant has a lot amount of alcohol amide structures which can make water moisten the coal surface rapidly. Studies on dispersant’s effects on rheological behaviour of CWS with different concentration, pH and shear rates, Zeta potential for different concentration are carried out to analyze the interaction of dispersants and the surface of coal particles. Dispersants make viscosity of CWS lower because of homogeneous moistening of coal particles through dispersants’ hydrophobic groups connecting to the surface of coal and their hydrophilic groups connecting to water molecular, breaking coal particles gathering and increasing stability of CWS effectively.