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马来酐-丙烯酰胺-丙烯酸羟乙酯共聚阻垢剂的研究 总被引:7,自引:0,他引:7
以马来酐、丙烯酰胺、丙烯酸羟乙酯为原料合成了新型三元共聚物阻垢分散剂,探讨了对共聚物阻垢性能的影响因素,得出了最佳合成条件:单体配比n(MA):n(AM):n(HEA)=1.5:0.6:0.4、引发剂与单体质量比为8%、聚合温度80℃、聚合时间4 h.阻垢性能试验表明该共聚物相对分子质量为2 400及共聚物质量浓度为15 mg/L时阻垢效果最好.该共聚物具有良好的阻垢性能,是一种高效的绿色阻垢剂. 相似文献
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《应用化工》2022,(1)
以衣康酸(IA)、苯乙烯磺酸钠(SSS)、2,2-二羟甲基丙酸(DMPA)为单体,过硫酸铵为引发剂,采用水溶液自由基聚合法,合成了一种含有羧酸基、磺酸基和羟基的多元衣康酸共聚阻垢剂。研究了反应物单体配比、反应温度、反应时间、引发剂质量分数对共聚物阻垢剂阻垢性能的影响。结果表明,在IA∶SSS∶DMPA(摩尔比)=4∶1∶1.5,引发剂用量占单体质量分数的11%,反应温度为90℃,反应时间为2.5 h条件下制得的共聚物阻垢剂阻垢性能最佳。通过静态阻垢法进行了阻垢剂的阻垢性能的评定,当此三元共聚物阻垢剂加剂量为12 mg/L时,对CaCO_3的阻垢率可达94.9%,用红外光谱和扫描电镜对共聚物阻垢剂的结构和CaCO_3垢样进行了表征。其中扫描电镜表明,加入此衣康酸三元共聚阻垢剂后,CaCO_3呈现明显的疏松结构。 相似文献
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《应用化工》2017,(1)
以衣康酸(IA)、苯乙烯磺酸钠(SSS)、2,2-二羟甲基丙酸(DMPA)为单体,过硫酸铵为引发剂,采用水溶液自由基聚合法,合成了一种含有羧酸基、磺酸基和羟基的多元衣康酸共聚阻垢剂。研究了反应物单体配比、反应温度、反应时间、引发剂质量分数对共聚物阻垢剂阻垢性能的影响。结果表明,在IA∶SSS∶DMPA(摩尔比)=4∶1∶1.5,引发剂用量占单体质量分数的11%,反应温度为90℃,反应时间为2.5 h条件下制得的共聚物阻垢剂阻垢性能最佳。通过静态阻垢法进行了阻垢剂的阻垢性能的评定,当此三元共聚物阻垢剂加剂量为12 mg/L时,对CaCO_3的阻垢率可达94.9%,用红外光谱和扫描电镜对共聚物阻垢剂的结构和CaCO_3垢样进行了表征。其中扫描电镜表明,加入此衣康酸三元共聚阻垢剂后,CaCO_3呈现明显的疏松结构。 相似文献
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以亚磷酸、衣康酸(IA)、2-丙烯酰胺-2-甲基丙磺酸(AMPS)为反应单体,水为溶剂,过硫酸铵为引发剂,合成了具有相对较低分子量的膦酰基羧酸类共聚物阻垢剂.考察了合成条件与共聚物阻垢性能的关系,采用静态试验法评价了合成产物的阻垢性能.结果表明:膦酰基羧酸类共聚物阻垢剂性能优良,阻垢率达到96%以上,可有效抑制CaCO3垢. 相似文献
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我厂3号回转窑(Φ4m×60m)生产线在1996年年底由SP窑(产量912t/d)改为NSP窑(产量1320t/d),预分解系统为四级旋风预热器带离线式分解炉 相似文献
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乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。 相似文献
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Conclusions It is significant that the purification on a single passage of viscose through porous ceramic corresponds to the result of a two-stage filtration of it in industrial filter-presses with standard fillings.Kiev Combine. Kiev Technological Institute of Light Industry. Translated from Khimicheskie Volokna, No. 3, pp. 20–22, May–June, 1969. 相似文献
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The objective of the study was to explore the effect of the degree of deacetylation (DD) of the chitosan used on the degradation rate and rate constant during ultrasonic degradation. Chitin was extracted from red shrimp process waste. Four different DD chitosans were prepared from chitin by alkali deacetylation. Those chitosans were degraded by ultrasonic radiation to different molecular weights. Changes of the molecular weight were determined by light scattering, and data of molecular weight changes were used to calculate the degradation rate and rate constant. The results were as follows: The molecular weight of chitosans decreased with an increasing ultrasonication time. The curves of the molecular weight versus the ultrasonication time were broken at 1‐h treatment. The degradation rate and rate constant of sonolysis decreased with an increasing ultrasonication time. This may be because the chances of being attacked by the cavitation energy increased with an increasing molecular weight species and may be because smaller molecular weight species have shorter relaxation times and, thus, can alleviate the sonication stress easier. However, the degradation rate and rate constant of sonolysis increased with an increasing DD of the chitosan used. This may be because the flexibilitier molecules of higher DD chitosans are more susceptible to the shear force of elongation flow generated by the cavitation field or due to the bond energy difference of acetamido and β‐1,4‐glucoside linkage or hydrogen bonds. Breakage of the β‐1,4‐glucoside linkage will result in lower molecular weight and an increasing reaction rate and rate constant. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3526–3531, 2003 相似文献
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A refined nonlinear value of the main parameter of a material, i.e., the elongation modulus versus the instant temperature value, was suggested for introduction into the computational algorithm of tempering stresses. 相似文献
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