烷基酚聚氧乙烯醚亲水链长度对水煤浆性能的影响

Effect of Hydrophilic Chain Length on the Coal-Water Slurry Properties of Alkylphenol Polyoxyethylene Ether

以烷基酚聚氧乙烯醚(APEO)为水煤浆添加剂,在不添加稳定剂的情况下,采用粘度分析法研究了APEO亲水链长度对5种不同煤所制得水煤浆的分散降粘作用的影响.结果表明,当APEO的亲水亲油平衡值为18.5±0.4,即APEO的聚氧乙烯加成数(EO数)为60～100时,所得水煤浆浆体的表观粘度出现最低值,再增加或降低EO数,成浆性能下降.不同APEO对应的最佳EO数不同,烷基链较短的对应较短的亲水链,烷基链较长的对应较长的亲水链.烷基碳原子数为7,9,12,14,16,18时,对应的最佳EO数分别为60,60,70,80,90和100.

The slurrying ability of alkylphenol polyoxyethylene （APEO）, a coal water slurry （CWS） dispersant, was studied by viscosity analysis of CWS prepared with coal from five sources in the absence of stabilizer. The effect of EO number of APEO addictive on the dispersibility of CWS was examined. The results show that the slurrying ability of APEO changes with the polyoxyethylene adduct number （EO number） obviously. The minimum apparent viscosity of prepared CWS is observed when the hydrophilic-lipophilic balance value of APEO is 18.5±0.4, i.e., when the EO number of APEO lies in the range from 60 to 100. Slurrying ability decreases beyond this EO number range and the optimal EO number increases with the length of alkyl chain in different APEO. APEO with a short alkyl chain shows a small optimum EO number, and vice versa. The optimal EO number has been determined to be 60, 60, 70, 80, 90 and 100 for APEO with different alkyl carbon number values of 7, 9, 12, 14, 16 and 18, respectively.