Two-stage lube stock refining from sulfides

An efficient method for cleaning hydrocarbon lube oil fractions of sulfides by their oxidation with hydrogen peroxide to sulfonic acids was developed. The sulfonic acids are removed from distillates by extraction with N-methylpyrrolidone.     

萃取精馏脱高温费托合成C_6馏分中的含氧化合物

采用PRO-Ⅱ模拟平台,选择NRTL热力学方法,以二甲基亚砜、1-甲基-2-吡咯烷酮(NMP)、N,N-二甲基甲酰胺和乙二醇4种溶剂为萃取剂,采用萃取精馏法对高温费托合成C6馏分脱含氧化合物流程进行了模拟,并考察了V(萃取剂)∶V(C6馏分)、塔板数、进料位置、回流比等工艺条件对分离结果的影响。模拟结果显示,NMP为最佳萃取剂,最优模拟操作条件为:理论塔板数为30块、进料位置为第15块,回流比为2,溶剂比为2。采用实验室小型精馏塔对高温费托合成C6馏分进行实验验证。实验结果表明,塔顶采出液中的正丙醇+2-丁酮+丁醛的总含量小于0.1%(w),塔釜采出液中1-己烯含量小于0.1%(w),与模拟值吻合良好。     

C4馏分和直馏汽油的非临氢改质技术及其工业应用

将C4馏分和直馏汽油混合料进行非临氢改质技术处理,可得到辛烷值高且烯烃含量低的汽油和富含烷烃的液化气.该非临氢改质技术在7万t/a C4综合利用装置上的工业应用结果表明,其主要产品是研究法辛烷值(RON)为84.2左右而烯烃质量分数为5.43%的稳定汽油和C3-4烷烃质量分数在90%左右而烯烃质量分数低于10%的液化气,同时副产少量干气;稳定汽油和液化气的收率平均值分别为67.45%,30.19%,且稳定汽油收率比设计值高了13.03个百分点,而液化气收率比设计值低了13.74个百分点,达到了多出稳定汽油、少出液化气的目的.     

双级固井中双级箍存在的问题分析及对策

深井、超深井及各种复杂井大量使用双级固井技术,促使科研人员研发了各种尺寸的双级箍。现场使用的双级箍存在打开困难或打不开,打开后不能建立循环,关闭不严,提前打开、关闭,钻除内套后试不住压及替空等问题。在总结双级箍存在问题的基础上,借助典型井例对各个问题进行了剖析,对各种问题提出了解决措施和建议,旨在提高双级固井质量,提高我国的双级箍研发水平,减少钻井事故的发生,降低钻井成本。     

Processing of the propylene-containing fraction from dehydrogenation of butane

The olefin-containing fractions obtained in many petroleum refining and petrochemical enterprises consist of more than 50 wt. % low-molecular-weight C₂-C₄ olefins. A propylene-containing fraction produced in production of butadiene at the Tobol’sk Petrochemical Combine is such a fraction. The total concentration of ethylene and propylene in it is 65–90 wt. %. This fraction is a by-product and has no qualified use since separation of olefins from it in pure form requires large outlays, including capital expenditures. Translated fromKhimiya i Tekhnologiya Topliv i Masel, No. 5, pp. 12 – 14, September – October, 1999.     

Characterization of light diesel fraction obtained from upgraded heavy oil

In this study, the role of a low-cost catalyst (activated molasses soil) over the hydrocarbon distribution of the light diesel (or distillate) fraction of the pre-upgraded heavy crude oil (Bati Raman) was examined in detail. The low-cost catalyst showed a strong impact on the hydrocarbon distribution of the light diesel fuel fraction. The physicochemical characteristics such as hydrocarbon group distribution, density and kinematic viscosity of the light diesel fuels obtained from the upgraded heavy oil indicated a proper consistency with those having the commercial diesel fuels. As a result, it was revealed that the low-cost material could be successively used in the heavy oil upgrading to obtain the light diesel fuels.     

热二聚法分离C5馏分中的环戊二烯

在立式连续或釜式间歇反应器中对乙烯裂瞬C5原料中的环戊二烯（CPD）进行热二聚,生成双环戊二烯（DCPD）后分离。考察了反应温度和反应时间对CPD热二聚反应转化率和DCPD收率的影响。结果表明,CPD转化率和DCPD收率均随着反应温度的升高和停留时间的延长呈上升趋势;采用釜式间歇反应工艺时,适宜的反应温度为120—130℃、反应时间为12h,此条件下CPD转化率及DCPD收率分别可达到约90％,85％。采用立式连续反应工艺时,适宜的反应温度为100—110℃,反应时间为9h,此条件下CPD转化率和DCPD收率最高分别为88％,78％。工艺过程中应控制原料C5中CPD的质量分数大于10％,C6的质量分数小于3％。