共查询到19条相似文献,搜索用时 125 毫秒
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以不同相对分子质量的聚异丁烯(PIB)为原料,与胺、烯酐、稀释剂等在不同条件下反应,制备润滑油无灰分散剂聚异丁烯丁二酰亚胺(PIBSI),并测试其分散性能和抗氧化性能;考察PIB相对分子质量、中间产物聚异丁烯丁二酸酐(PIBSA)的合成工艺对PIBSI性能的影响。结果表明:随着原料PIB相对分子质量的增加,PIBSI的分散性能与抗氧化性能均有提升;与氯化法工艺相比,自由基法工艺不仅能耗低、污染小,而且合成的PIBSI性能更好;其中,由数均相对分子质量为2 300的PIB原料经自由基法工艺制备的PIBSI分散性能最佳,其油泥斑点分散值(SDT)最高可达73.15%。 相似文献
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聚异丁烯丁二酸季戊四醇酯无灰分散剂的研制 总被引:4,自引:1,他引:3
对聚异丁烯丁二酸戊四醇酯无灰分散剂采用催化酯这种新的合成工艺过程中的反应温度1反应时间催化剂选择和用量等工艺者了考察,确定了最佳工艺条件;并对该剂进行了模拟评定、台架和工业放大试验。共结果表明:该剂性能与国外产品LZ936相当,在油品配方中,酯型无灰分散剂和丁二酰亚胺类分散剂复合使用可使油品高低温性能均较好,可用于中、高档内燃机油。 相似文献
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自由基一步法生产聚异丁烯丁二酸酐及其丁二酰亚胺无灰分散剂 总被引:4,自引:0,他引:4
聚异丁烯丁二酸酐(烯酐)是生产丁二酰亚胺型,丁二酸酯型和酚醛胺型无灰分散剂的重要中间体。针对当前热加合工艺和氯化工艺生产燃酐的缺陷,开发了自由基一步法烃化工艺合成烯酐。该工艺经过小试,工业放大试验,生产的烯酐和丁二酰亚胺产品质量符合现行技术指标要求,丁二酰亚胺产品经外光谱分析,其结构与国内外类剂T-152,OLOA-373和LZ-6418相近。新工艺与现行的氯化工艺相比具有工艺简单易行,生产装置投资少,反应温度低,生产周期短,能耗低,生产成本低的特点,而且从工艺源头根除了氯气污染源,符合国家生态安要求。 相似文献
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采用聚异丁烯基丁二酰亚胺、咪唑和水杨醛为原料制备了一种新型沥青分散剂,考察了原料配比、反应温度和反应时间对产品阻垢性能的影响;采用傅里叶红外光谱对产品结构进行表征;采用经典失重法考察产品的缓蚀性能,对其进行热重分析,并考察了阻垢剂各组分配比对油浆阻垢性能的影响。结果表明:沥青分散剂的最佳合成条件为:n(聚异丁烯基丁二酰亚胺):n(咪唑):n(水杨醛)=2:2:1,反应温度140 ℃,反应时间5 h;红外光谱分析表明合成的样品为目的产物;合成的沥青分散剂具有良好的热稳定性,在200~380 ℃内未出现热失重情况;具有较好的阻垢性能,当加入量(w)为150 μg/g时,对油浆的阻垢率可达79.0 %;并具有较好的缓蚀性能,缓蚀率为84.6%。 相似文献
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探索了聚异丁烯硫膦酸钙(简称硫膦酸钙)的合成工艺,重点考察了聚异丁烯硫膦酸(简称硫膦酸)、硫膦酸钙的合成条件。在硫膦酸合成中,考察了反应温度、反应时间、五硫化二磷(P2S5)加入量、催化剂加入量和水的加入量等工艺条件的影响,得到优化的工艺条件为:反应温度为T0,反应时间为10 h,P2S5加入量(与聚异丁烯质量比)为21%,催化剂加入量(与聚异丁烯质量比)为0.5%,水加入量(与聚异丁烯硫膦酸酐质量比)为0.10%;并通过钙化工艺得到低碱值硫膦酸钙。中型放大试验结果表明:合成硫膦酸、硫膦酸钙的工艺条件稳定,试验重复性好,所合成的硫膦酸钙碱值在40~50 mgKOH/g之间,磷质量分数大于0.9%,硫质量分数大于3.0%;产品具有良好的清净、分散、抗氧化性能,可以用于内燃机油中。 相似文献
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M. A. Silin L. V. Ivanova E. A. Burov V. N. Koshelev E. G. Bordubanova 《Petroleum Chemistry》2012,52(4):272-277
Alkenyl succinimides with different alkyl chain lengths have been synthesized. Alkenyl succinimide samples based on polyisobutylene with molecular weights of 1000 and 1300 have displayed the best functional properties. By differential thermal analysis, it has been shown that these samples have high thermal stability and do not decompose at temperatures of about 300°C. Two representative samples of polyalkenyl succinimides in the composition of blended gasoline have been subjected to bench testing in a full-sized engine. A significant reduction in deposits on the engine intake valves has been noted upon testing the fuel in the presence of the synthesized samples with a concentration of 0.05 wt %. 相似文献
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采用分子动力学(MD)模拟方法研究了润滑油氧化产生的极性小分子的聚集行为以及分散剂聚异丁烯琥珀酰亚胺对其聚集的影响。研究发现:随着模拟时间的增长,润滑油氧化产物分子通过氢键形成了分子聚集体;在不含分散剂的润滑油中,形成聚集体的分子个数不断增加,润滑油氧化产物分子在晶胞中的分布不断集中;在含有分散剂的润滑油中,润滑油氧化产物分子之间仍可以形成2~3个分子组成的小聚集体,但是没有出现由多个分子形成的大聚集体,润滑油氧化产物分子仍然相对均匀地分散在晶胞中;分散剂通过对润滑油氧化产物分子形成空间阻隔以及与润滑油氧化产物分子之间形成更加稳定的氢键两方面的作用,阻碍其形成大聚集体。 相似文献
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As the efficiency of dispersants with different origins is questionable for each typical oil sample, the present study provides a reproducible and reliable method for screening asphaltene dispersants for a typical asphaltenic crude oil. Four different asphaltene dispersants (polyisobutylene succinimide, polyisobutylene succinic ester, nonylphenol-formaldehyde resin modified by polyamines, and rapeseed oil amide) were prepared and their performance on two oils from an Iranian field under laboratory and reservoir conditions was studied. A thorough analysis including ash content and SARA tests was performed on the solid asphaltene particles to characterize the nature of deposits. Then a highly efficient carrier fluid, which is crucial when injecting dispersant into the wells, was selected from a variety of chemicals by comparing their solubility. In the next step, using an optical microscope, a viscometer, and a Turbiscan, the screening of dispersants under laboratory conditions was done on a mixture of dead oil and dispersant to evaluate the onset of asphaltene precipitation and its stability when titrating by a precipitant. Finally, two different mixtures of the efficient dispersants, live oil, and carrier fluid were used with the solid detection system (SDS) and the filtration method to examine their effects on the onset pressure of asphaltene precipitation and the asphaltene content of the crude oil under reservoir conditions. The results show that the combination of experimental methods used in this work could be consistently applied to screening asphaltene dispersants. Among the four different dispersants applied here, the dispersant based on nonylphenol-formaldehyde resin modified by polyamines showed the best performance on the available live oils. This chemical modified the onset pressure of asphaltene precipitation of light oil from 4300 psi to about 3600 psi and decreased the precipitated asphaltene of heavy oil by about 30 %. 相似文献
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段庆华 《石油学报(石油加工)》2000,16(5):56-60
研究了丁二酰亚胺的界面活性、对丙酮酸的增溶性能及与 ZDDP复合体系的相互作用。结果表明 ,单丁二酰亚胺的界面活性及对丙酮酸的增溶能力较强 ;丁二酰亚胺与 ZDDP复合后增溶能力有所提高。 相似文献
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