共查询到20条相似文献,搜索用时 62 毫秒
2.
3.
4.
5.
石蜡加氢精制催化剂的发展 总被引:1,自引:0,他引:1
对我国14套石蜡加氢精制装置上国产催化剂的应用情况、国外一些已工业化的石蜡加氢精制催化剂、国内外石蜡加氢精制催化剂的研究动向进行了综述。指出:经过二十余年的发展,我国的中压石蜡加氢精制技术已达到了世界先进水平;近几年来,由于石蜡原料的劣质化给石蜡加氢精制增加了难度,许多公司都致力于开发性能(活性、选择性、寿命及机械强度)优异的石蜡加氢精制催化剂,以全面满足生产优质产品的要求。 相似文献
6.
7.
8.
9.
10.
11.
为了克服油基清防蜡剂存在的有毒、易燃、密度小等缺点,解决水基清防蜡剂存在的清蜡效率低、防蜡效果差及乳液型防蜡剂稳定性差等不足,利用表面活性剂亲水亲油基团结构特点,将蜡晶改进剂均匀地分散在水中,研究出具有低毒不易燃烧、密度较大、清蜡效率高、防蜡效果好等优点的水基蜡晶改进剂型防蜡剂。室内实验表明,该防蜡剂在最佳的配比条件下,降黏率和动态防蜡率大于70%。现场试验表明,采用连续加药方式,可有效减少洗井次数,提高油井产油量。 相似文献
12.
加速法测定石蜡臭味稳定性 总被引:5,自引:0,他引:5
介绍了一种加速测定石蜡臭味稳定性的方法,主要考察了温度、氧化时间、铜线等因素和样品本身的性质对试验结果的影响,并考察了国内部分石蜡产品的臭味稳定性,找出了试验温度、样品本身的性质等是影响该试验结果的主要因素。实验证明,该方法精密度较高,值得推广使用。 相似文献
13.
Bin Xu 《Petroleum Science and Technology》2013,31(20):1635-1641
AbstractWax deposition is harmful to oil wells, especially for waxy heavy oils at low temperature. The influencing factors on wax deposition of heavy oil were studied and a kind of O/W emulsion type wellbore wax remover was investigated. The results showed that the wax deposition rate of Jinghe heavy oil increased with the increasing wax content and asphaltenes content but decreased with the increasing water content. The oil in water emulsion type paraffin remover was prepared and it showed both good wax dissolution and paraffin prevention ability and can save large quantities of solvent. The results of this study provides a possible way for waxy heavy oils to dissolve wax, to prevent wax deposition and reduce the viscosity of heavy oils by emulsification together, which is helpful to reduce the frequency of hot washing and enhance oil recovery for waxy heavy oils. 相似文献
14.
采用顶空-固相微萃取-气相色谱-质谱联用技术对石蜡挥发组分中甲苯和其它有嗅物进行了检测,分析了石蜡中硫、氮和芳烃含量。指出其中甲苯是主要的致嗅物质,二甲苯等苯系物、高碳酮、糠醛及其衍生物是次主要致嗅物质。因硫和氮的含量很低、石蜡中原有芳烃相对挥发度小,对嗅味的贡献远小于上述物质,在一般蜡中未见显著影响。在实验室进行了汽提和白土降嗅试验,结果显示试验样品在较低温度下汽提效果不显著,温度高于200℃后,产品嗅味可不大于1.0号。白土后处理也可降低嗅味。指出早期石蜡生产装置因对嗅味要求不高,分离效率往往较低。对于石蜡精炼装置(如蜡汽提塔),最终应尽可能除沸点不低于161℃的苯系物、酮、醛等物质,作为装置设计和改造的出发点。 相似文献
15.
16.
《石油化工》2019,48(11):1134
采用非离子型乳化剂吐温-60、司潘-80与阴离子型乳化剂十二烷基苯磺酸钠复配,制备了造纸用高稳定性石蜡亚微乳液,利用单因素法考察了配方组成、乳化时间、乳化温度和搅拌转速对乳液粒径大小及分布、分散性和稳定性等的影响。确定了乳化水、58#石蜡、司潘-80、吐温-60和十二烷基苯磺酸钠的最佳用量分别为乳液质量的69.9%,21.0%,3.6%,5.4%,0.1%,得到了最佳制备条件为乳化时间20 min、乳化温度95℃、搅拌转速1 300 r/min,在该条件下制备的石蜡亚微乳液稳定性高,且分散性、固含量等满足造纸用石蜡乳液的基本要求,可用于造纸工业。 相似文献
17.
18.
Microbial remediation is an efficient method of removing paraffin wax from oil wells and pipelines and is found to be environment friendly and economical. In this study, a potential paraffin wax degrading bacterial strain was isolated from oil wells of Gujarat and was identified as Pseudomonas nitroreducens by 16S rRNA sequencing. Pseudomonas nitroreducens showed 100% utilization of heneicosane, 79.74% utilization of pentacosane and 72.50% utilization of triacontane, the major components of paraffin wax in 8 days at 37°C. Pseudomonas nitroreducens degraded 70% of paraffinic crude oil in 10 days at 37°C. The probable end products formed after degradation of eicosane and heneicosane by Pseudomonas nitroreducens were analysed by Mass Spectrum. The above results proving isolate as a potential candidate for degradation of paraffin wax in oil wells. 相似文献
19.