共查询到15条相似文献,搜索用时 68 毫秒
1.
2.
以淀粉和三甲基环氧丙基氯化铵为原料,在三氯化铝催化作用下,制备了阳离子淀粉,最佳反应条件为:淀粉 50g,三甲基环氧丙基氯化铵 10g,三氯化铝 0. 74g, 50%乙醇 60mL,反应温度 50℃,反应时间 17h. 相似文献
3.
以酶解木质素、甲醛、二甲胺及阳离子化试剂为原料,制备了木质素基阳离子絮凝剂.改变阳离子化试剂的用量、缩合反应的温度和时间等因素,制备不同阳离子度的木质素阳离子絮凝剂;通过其对酸性黑10B的脱色效果研究,确定了最优的制备方案.利用最优条件制备的木质素阳离子絮凝剂对三种不同种类阴离子染料废水进行了絮凝脱色处理.结果表明,原... 相似文献
4.
5.
6.
7.
8.
9.
10.
交联阳离子淀粉的制备及其脱色性能 总被引:12,自引:0,他引:12
在碱催化剂6%氢氧化锂水溶液存在下,以N-(2,3-环氧丙基)三甲基氯化铵(GTA)为阳离子化试剂,制备了交联高取代度季铵型阳离子淀粉。考察了6%氢氧化锂水溶液、水含量、反应温度和反应时间对取代度和反应效率的影响。当淀粉用量为5.8g,GTA用量为3.0g时,最佳反应条件为:6%氢氧化锂水溶液2.0g、反应温度70℃、反应时间2h、反应体系含水量24.6%。在此条件下,取代度可达0.5,反应效率为83.3%。对制得阳离子淀粉的脱色性能研究结果表明,交联取代度阳离子淀粉对活性染料具有优异的脱色效果。当投加量为105mg/L时,对质量浓度为100mg/L活性红X-3B、活性黄KN-6G、活性蓝X-BR溶液的脱色率分别为99.1%、88.0%、95.5%。 相似文献
11.
高分子阳离子絮凝剂用于炼油废水处理研究 总被引:15,自引:0,他引:15
用聚二甲基二烯丙基氯化铵型高分子阳离子絮凝剂处理炼油废水考察了险油和化学耗氧量的动态变化规律。对产生的浮渣性质及滤饼的成份进行了研究。并且与聚合铝的处理效果进行对照。研究结果表明,HCA除油和化学耗管氧量的性能优于PAC,HCA产生的浮渣是PAC的三分之一,而浮渣中的含油量则是PAC的三倍。 相似文献
12.
以硝酸铈铵为引发剂,合成阳离子淀粉(CS)-壳聚糖(CTS)-丙烯酰胺(AM)接枝共聚物,讨论了反应温度、引发剂浓度、单体用量、反应时间以及壳聚糖用量对接枝共聚反应的影响。结果表明:淀粉中葡萄糖环浓度(cAGU)为0.20 mol/L,mCTS/mCS=1/6,cAM=1.0mol/L,cCe4 =5 mmol/L,反应温度60℃,反应时间3 h时,转化率和接枝效率可分别达到88%和92%以上;转化率随mCTS/mCS增大而增大,接枝效率则随着CTS用量增大降低,CTS的存在使AM均聚的几率增大。 相似文献
13.
Starch can be efficiently converted into the corresponding formates homogeneously using N-formyl imidazole obtained by the reaction of 1,1′-carbonyldiimidazole and formic acid in dimethyl sulfoxide as a solvent. Starch formates are soluble in polar aprotic solvents, not susceptible against hydrolysis, and not meltable. Thermoplastics could be generated by conversion of starch formates with long-chain fatty acids exemplified by the conversion with lauroyl chloride in N,N-dimethylacetamide, leading to mixed starch laurate formates. The mixed esters show melting temperatures mainly dependent on the amount of laurate ester moieties. 相似文献
14.
电磁干法制备阳离子淀粉 总被引:8,自引:0,他引:8
阳离子淀粉是一种系列产品,用不同类型的醚化剂,在不同反应条件下进行阳离子化反应,能制得不同类型和品种且具有不同用途的阳离子淀粉,可用作优良的造纸湿部添加剂和补强剂,已广泛应用于造纸、纺织、食品和油田钻井等行业,目前国内外均采用湿式法工艺来制备各种不同的阳离子淀粉,为改善其性能和提高生产效率,经反复试验,我们发现利 相似文献
15.
Yan Li Hao-Yu Bi Shuang-Long Shen Xiao-Ming Mao Cai-Rong Wang Yong-Sheng Jin 《Journal of Dispersion Science and Technology》2013,34(9):1239-1246
The thixotropic behavior of Mg-Al hydrotalcite-like compound (HTlc)/cationic starch (CS) suspensions was investigated as a function of the mass ratio (> 0.08) of HTlc to CS, the electrolyte and the temperature, respectively. The thixotropy was studied by monitoring viscosity (η) change during the recovery process as a function of time (t) after the cessation of intensive shear. The results showed that the strength of negative thixotropy of the CS solution decreased with the increasing of electrolyte (NaCl, CaCl2, or AlCl3) concentration and the temperature. The thixotropic type of the HTlc/CS suspensions could transform from negative to complex, positive, complex, and then to negative thixotropy with the increasing of HTlc content if CS was the main component of the suspensions. In addition, the thixotropic type of the HTlc/CS suspensions transformed from original type to positive thixotropy with the increasing of electrolyte concentration and the temperature. 相似文献