对炼油厂副产低碳烃及低辛烷值油品的裂解性能评价

在实验室裂解装置上,对中国石油兰州石化分公司炼油装置副产的低碳烃(丙烷、正丁烷、轻C4及重C4)和低辛烷值油品(重整拔头油、重整抽余油和焦化汽油)的裂解性能进行了评价。结果表明,丙烷、正丁烷和重整拔头油是裂解制乙烯的优质原料;重整抽余油裂解时,在900℃,m(蒸汽)/m(重整抽余油)为0.63的条件下,乙烯收率为31.87%,三烯(乙烯、丙烯和丁二烯)总收率为50.62%;焦化汽油的裂解性能与库西石脑油相当;在890℃,m(蒸汽)/m(焦化汽油)为0.60的条件下,乙烯收率为31.63%,三烯总收率为50.34%。     

Synthesis and Structure of a Polymeric Complex [Ce（bphsb）2（NO3）3]n

Polymeric cerium nitrate complex with 1,4-bis (phenylsulfinyl) butane (bphsb) [Ce(bphsb)2(NO3)3]n (1) was synthesized and characterized. The crystal structure of the complex indicated that the ligand bphsb and cerium( Ⅲ ) ion form a polymeric double-bridge chain complex involving 18-membered macrometallocycles. Each cerium ion is coordinated by ten 0 atoms in a distorted 4,4-bicapped square antiprism. In the complex the disulfoxide ligand acts as bis-monodentate O-ligand bridging metal centers.     

No x abatement over VPO catalysts

Vanadium phosphorus oxide (P/V = 1.1) was found to be active for NO reduction by butane to N₂ at 766–816 K. The conversion increased with increasing butane concentration, increasing temperature, and decreasing NO concentration. The activity per surface vanadium ion compared favorably with other active catalytic systems, but was low in the absence of butane. Propane was also effective in reducing NO over this catalyst.     

常温液态混合丁烷精脱硫技术的工业应用

介绍常温液态混合丁烷精脱硫原理及工艺流程,简述QSJ-01型COS脱除剂和SQ108型常温吸附剂在异丁烷脱氢装置混合丁烷原料精脱硫过程中的工业应用。结果表明,经过该技术精脱硫后,混合丁烷总硫含量可降至小于1×10-6,脱硫效果显著,满足了异丁烷脱氢催化剂的要求。     

2,3,5-三甲基吡嗪生产工艺的改进

本文讨论以丁二酮、1，2－丙二胺为原料，合成2，3，5－三甲基吡嗪生产工艺条件的改进，重点讨论溶剂、萃取剂的改变对其产率的影响。结果表明：当丁二酮、1，2－丙二胺、碱土金属氧化物、氢氧化钾，乙醇溶剂的投料比为1：1．1：2．2：2．2：12（物质的量比）时，乙醇溶剂部分改用碱性回收乙醇，萃取剂改用价格低廉的饱和盐水，可大大降低产品的成本，且对其产率不发生影响，以丁二酮计其转化率可达57％左右，产品纯度≥99．0％。     

Analysis of factors controlling catalytic activity by neural network

An artificial neural network was applied to the analysis of factors controlling catalytic activity by taking, as examples, experimentally established correlations of catalytic activities with primary factors including both monotonous and volcano-type correlations. Three equations were proposed and applied to the estimation of relative importance of each given factor from the weightings of connecting links in the trained artificial neural network of an error back-propagation model. In all the examples, the primary factors that had been proposed in experimental studies were successfully identified by using an equation based on our previous proposal. Further, the possibility of identifying secondary factor was also discussed.     

碳氢制冷剂热物理性质的计算

将Carl的热物理性质计算关联式应用于碳氢制冷剂HC290和HC600a，在制冷空调的常用温度范围内，检验了Carl系数的计算精度，并进行了重新拟合，使拟合误差比应用Carl系数的误差减小了一个量级左右，效果良好，可用于系统仿真和快速工程计算。另外补充了新的饱和蒸汽的热物理性质计算方程及系数，给出了全部计算偏差结果，最后对数据拟合的精度问题作了简要分析。     

亚临界溶剂生物萃取技术的发展及现状

对用于亚临界萃取的溶剂、生产工艺和设备进行综述,并详细介绍了亚临界生物萃取技术的应用范围。     

丁烷芳构化反应规律的研究

利用100 mL等温固定床实验装置,采用LAC芳构化催化剂,研究了丁烷芳构化生产芳烃的反应规律,主要考察了反应温度和空速对丁烷芳构化产品分布的影响。实验结果表明,高温和低空速可得到较高的液体收率和芳烃收率。随着反应温度的升高,丁烷芳构化反应的液体收率逐渐增大,同时干气产率也增加较快;随着进料空速的增大,丁烷芳构化反应的液体收率和干气收率逐渐减小,而液化石油气收率逐渐增大。反应温度和进料空速对n-C4H10的芳构化反应影响较大,而对i-C4H10的影响较小;i-C4H10较n-C4H10易转化为芳烃,当反应温度为460～540℃、质量空速为0.25～1.00 h-1时,以n-C4H10为原料能得到质量分数为17%～30%的轻质芳烃和质量分数为10%～16%的液化石油气,以i-C4H10为原料能得到质量分数为33%～41%的轻质芳烃和质量分数为21%～34%的液化石油气。在大量实验的基础上得到了丁烷单体烃芳构化反应的液体收率随工艺条件变化的经验关联式,利用此关联式在一定条件下可以预测不同组成丁烷芳构化反应的液体收率,关联式的绝对误差小于2.5%。