共查询到19条相似文献,搜索用时 140 毫秒
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2011年初,永坪炼油厂120万吨催化裂化装置,面临巨大挑战:原油性质发生较大变化,重质化、劣质化现象日益严重,原型号催化剂已不适应生产形势的变化,迫切需求一种适合加工重油的催化剂。该装置试验使用LVR-60R催化剂,并对催化剂置换前后的生产情况、催化剂活性、加工量、收率、产品质量等一系列关键参数对比分析。 相似文献
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介绍了长岭催化剂厂生产的提高炼油厂催化裂化装置液化气及丙烯产率的专用新型催化剂CRMI-2在中石化股份公司安庆分公司炼油一部MIP催化裂化装置的试用过程。通过对比使用过程中两次标定数据与空白标定数据,对CRMI-2的试用结果进行了总结,长岭催化剂厂生产的专用新型催化剂CRMI-2能有效提高炼油厂催化裂化装置的液化气及丙烯产率。 相似文献
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介绍中国石化催化剂有限公司齐鲁分公司COKC-1催化剂在中国石化武汉分公司二套催化裂化装置的工业应用情况。结果表明,与对比催化剂相比,在平衡剂重金属含量增加情况下,COKC-1催化剂表现出优良的抗重金属能力和水热稳定性;使用COKC-1催化剂后,汽油产率增加6.68个百分点,汽油产率达到51.28%,液化气和汽油总产率增加2.73个百分点,油浆、干气和柴油产率下降。 相似文献
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抚顺石化分公司石油二厂1.5Mt/a催化裂化装置于2010年12月进行MIP—CGP工艺改造,并于2011年12月使用专用催化剂CGP—FS。应用结果表明,当CGP—FS催化剂占系统藏量75%时,与使用降烯烃催化剂LDO-70时相比,汽油辛烷值RON上升3.5个单位,达到90左右;汽油烯烃保持在32%左有;液化气丙烯含量上升13%;柴油变重、密度增加、十六烷值下降到22.5;油浆变重、密度增加,芳香烃含量达到85%左右;液化气收率增加5.33%,汽油产率下降2.62%,油浆产率下降2.27%,轻收下降2.89%,总液收上升1.44%。 相似文献
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《过程工程学报》2016,(6)
用不同催化剂微波裂解棉秆,研究了催化剂对裂解产物产率和裂解油组分的影响.结果表明,NaOH,Na_2CO_3和H_3PO_4均可降低液体产物产率、增加固体产物和气体产物产率.液体产率由不加催化剂时的28.9%分别降到23.8%,22.1%和26.7%.不加催化剂时微波裂解油中主要组分包括羟基丙酮、糠醛、愈创木酚及4-甲基愈创木酚,加入NaOH和Na_2CO_3均能显著提高羟基丙酮含量,羟基丙酮含量由35.24%提高到约50%.加入H_3PO_4可明显促进糠醛和4-甲基愈创木酚生成,糠醛+4-甲基愈创木酚含量提高到约70%,而不加催化剂时其含量均在10%以下,且H_3PO_4抑制羟基丙酮生成,并显著简化微波裂解油组分.提出了由纤维素、半纤维素和木质素分别直接裂解生成羟基丙酮、糠醛和4-甲基愈创木酚的可能的反应路径. 相似文献
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LHO-1降烯烃催化剂的工业应用 总被引:1,自引:0,他引:1
榆林炼油厂12万t/a催化裂化装置加工的原料为长庆石蜡基原油,混合原料性质较好,表现为重金属含量一般,残碳低,密度不高,易裂化及轻质油收率高等。为提高装置总液收率和进一步降低汽油组分中的烯烃含量,催化裂化装置开始试用LHO-1催化剂。工业实验表明,LHO-1的综合性能优于LBO-16催化剂。使用LHO-1降烯烃催化剂以来,H/C降低了22.9%,抗重金属污染性能较好,水热稳定性较好,流动性能较好,催化剂单耗由0.85 kg/t油降到0.82 kg/t油,油浆产率降低了1.2%,产品收率提高了1.1%,催化汽油烯烃含量较使用LBO-16催化剂降低约5%,变化不明显。 相似文献
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对利用油酸氧化制取壬二酸进行了较为系统的探索。在 50℃ ,pH =2 .5,适宜催化剂条件下 ,壬二酸的收率提高到 60 %,且反应条件温和 ,具备工业生产的价值。 相似文献
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A non-phosgene route for the synthesis of hexamethylene-1,6-diisocyanate(HDI) was developed via catalytic decomposition of hexamethylene-1,6-dicarbamate(HDC) over Zn–Co bi-metallic supported ZSM-5 catalyst.The catalyst was characterized by FTIR and XRD analyses. Three solvents dioctyl sebacate(DOS), dibutyl sebacate(DBS) and 1-butyl-3-methylimidazolium tetrafluoroborate(BMIMBF_4) were investigated and compared; DOS gave better performance. The catalytic performances for thermal decomposition of HDC to HDI using DOS as solvent were then investigated, and the results showed that, under the optimized reaction conditions, i.e.,10 wt%concentration of HDC in DOS, 250 °C temperature, 60 min reaction time, 83.8% yield of HDI had been achieved over Zn–Co/ZSM-5. Decomposition of the intermediate hexamethylene-1-carbamate-6-isocyanate(HMI) over Zn–Co/ZSM-5 in DOS solvent was further studied and the results indicated that yield of HDI from HMI reached to 69.6%(98.6% HDI selectively) at 270 °C, which further increased the yield of the total HDI(HDI_(tol)) to as high as 95.0%. Recycling of catalyst showed that HDI and HMI yield slightly decreased, and by-product yield increased after the catalyst was reused for 4 times. At last possible reaction mechanism was proposed. 相似文献
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Continuous production of palm methyl esters 总被引:4,自引:0,他引:4
A system for continuous transesterification of palm oil was developed using a continuous stirred-tank reactor (CSTR) and pumps
for continuous delivery of oil and catalyst and for continuous removal of product. Potassium hydroxide was used as the catalyst,
the methanol-to-oil molar ratio was 6∶1, and reaction temperature was 60°C. The yield of methyl esters increased from 58.8%
of theoretical yield at a residence time of 40 min to 97.3% at a residence time of 60 min. However, higher residence times
decreased the production rate. During long-term continuous operation, the CSTR displayed steady state conditions in terms
of product profile and methyl ester concentration. This process has good potential in the manufacture of biodiesel. 相似文献
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介绍了LOG-90型高辛烷值型重油催化裂化催化剂的反应性能,并进行固定流化床评价。结果表明,与对比催化剂相比,优化反应条件后,LOG-90型催化剂重油产率由5.31%降为5.04%,焦炭产率由8.37%升为8.53%,总液体收率由83.27%降为83.15%,丙烯收率由4.06%升为6.32%,研究法辛烷值提高1.14个单位,达到90.64,马达法辛烷值提高0.85个单位,达到82.50。1.2 Mt·a-1催化裂化装置工业应用结果表明,与空白标定相比,总结标定时油浆产率和总液体收率基本相当,汽油研究法辛烷值提高1.57个单位,达到91.5。单柱色谱法与多维色谱法综合分析结果表明,汽油辛烷值增加是芳烃含量与异构烃含量共同增加的结果。 相似文献
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Jifeng Pang Mingyuan Zheng Aiqin Wang Ruiyan Sun Hua Wang Yu Jiang Tao Zhang 《American Institute of Chemical Engineers》2014,60(6):2254-2262
Miscanthus, a promising energy crop, was used for ethylene glycol (EG) production through one‐pot catalytic conversion. With a binary catalyst composed of commercial tungstic acid and Raney Ni, the miscanthus with 1 % concentration was transformed into EG with a yield of 35.5%. However, the yield dropped to 13.6% as the miscanthus concentration was increased to 10 %. The underlying reason for the yield decrease was disclosed through analysis of the liquid products, investigation of pretreatments, and characterization of the catalysts. It was found that the protectors on the surface of miscanthus and the lignin component underwent decomposition under reaction conditions, resulting in the formation of some organic acids and unsaturated compounds that preferentially poisoned the Raney Ni catalyst and consequently decreased the EG yield. When the inhibitors were effectively removed by base solvent pretreatment, the EG yield was successfully improved to 39.0% even under 10% concentration of feedstock. © 2014 American Institute of Chemical Engineers AIChE J, 60: 2254–2262, 2014 相似文献
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