共查询到18条相似文献,搜索用时 156 毫秒
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《精细化工原料及中间体》2017,(7)
<正>该项目位于湖南省岳阳市路口镇,由中国石油化工股份有限公司长岭分公司筹建,将现有的30万吨/年催化重汽油加氢装置改造成60万吨/年催化轻汽油醚化装置,装置以催化轻汽油和甲醇为原料,采用轻汽油醚化工艺,大幅度降低汽油中的烯烃含量。主要建设内容包括汽油切割装置部分和汽油醚化装置部分,项目总投资9987万元。 相似文献
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《中国石油和化工标准与质量》2016,(12)
60万吨/年催化汽油加氢装置采用DSO催化汽油选择性加氢脱硫成套技术,全馏分催化裂化汽油在分馏塔内实现轻汽油馏分(LCN)和重汽油馏分(HCN)分离,轻汽油馏分作为产品直接与加氢脱硫后的重汽油进行调和。轻汽油馏分去新建醚化装置后,结合汽油加氢装置实际产生的问题分析对本装置生产与运行产生一定影响。 相似文献
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《化学工业与工程技术》2000,21(2)
由齐鲁石化研究院开发成功的轻汽油醚化工艺技术 ,近日在京通过鉴定。该技术是将FCC轻汽油馏分 (≤ 75℃ )经水洗和选择性加氢处理 ,以满足醚化工艺对原料的质量要求 ,然后经串联的醚化反应器和催化蒸馏塔进行醚化反应。目前 ,该工艺已完成中试。结果表明 ,叔戊烯的总转化率≥ 91% ,TAME的选择性≥ 99% ;叔己烯的总转化率≥ 4 1% ,甲基叔己基醚的选择性达 10 0 %。经醚化的轻汽油馏分与重汽油馏分调和后的汽油烯烃含量降低 5.4个质量百分点 ,蒸汽压降低 10 .5% ,辛烷值 (RON)提高 1个单位 ,氧含量约达 1.14%。该技术达到了目前国… 相似文献
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轻汽油催化醚化工艺的反应条件温和,过程环保,已被证明是提高车用汽油质量的有效手段之一.该工艺将催化裂化汽油中的C4~C7活性烯烃与醇类发生反应,生成相应的醚,总转化率可达90%以上,催化汽油中的烯烃含量降低了29v%,还可将全馏分催化裂化汽油的辛烷值(RON)提高2~3个单位,蒸气压下降10~12kPa,氧含量达到5.... 相似文献
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在实际生产过程中,MTBE装置加工后的剩余C4中含有大量非活性C4烯烃,该部分烯烃随着液化气作为产品进行销售,对于液化气中的C4造成浪费。提出将MTBE装置剩余C4引入汽油加氢醚化装置异构化反应器进行异构化反应,将剩余C4中的非活性烯烃转化为活性烯烃,再将异构化产物送至MTBE装置原料缓冲罐中作为MTBE装置原料进行反应。通过调研后得出,异构化反应器催化剂对剩余C4中的非活性烯烃转化率可达30%,异构化反应产物与进料对比,异丁烯含量上升约3%,可有效提高MTBE装置产品产量。 相似文献
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利用催化裂化催化剂在小型固定流化床实验装置上对催化裂化汽油催化改质降烯烃过程的反应规律进行了实验研究,详细考察了反应温度、剂油比和重时空速对产物收率和汽油辛烷值的影响,得到了催化裂化汽油改质过程的最佳实验操作条件:反应温度为400~430℃,剂油比为7左右,重时空速为20~30 h-1。在此基础上,计算了汽油改质过程的反应热,分析了反应条件对反应热的影响,揭示了反应热的变化规律。结果表明,低温改质为放热过程,高温改质为吸热过程。改质条件对反应热影响的强弱顺序为反应温度>剂油比>重时空速。 相似文献
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Conversion of polyolefins (HDPE, LDPE and PP) into feedstock naphtha was investigated by hydroliquefaction process. Hydroliquefaction experiments were carried out under cold hydrogen pressure of 5 MPa at the temperatures between 375 and 450 °C in absence and presence of catalyst. Two types commercial catalysts were used, a hydrocracking catalyst (DHC-8) and a hydrogenation catalyst (HYDROBON). The effect of temperature and catalyst type on product yields and composition of gas and liquid products was investigated. The temperature was the main effect in hydroliquefaction. DHC-8 showed good cracking activity, but it gave the liquid product containing high olefin content same as thermal run. Although HYDROBON catalyst produced the sufficient amount of liquid (and naphtha fraction) at the higher temperature, it gave the liquid product with very low olefin content. The naphtha fractions obtained from polyolefins under the optimal hydrocracking conditions were analyzed by PIONA instrument to determine the hydrocarbon groups. PIONA analysis showed that the naphtha obtained from hydroliquefaction over HYDROBON catalyst could be used as a petrochemical feedstock. However, the naphtha obtained in presence of DHC-8 catalyst, which is to be used a feedstock, was needed further hydrogenation treatment. 相似文献
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Study of direct and indirect naphtha recycling to a resid FCC unit for maximum propylene production 总被引:2,自引:0,他引:2
To satisfy the increasing propylene demand, direct and indirect naphtha recycling schemes around an existing resid fluid catalytic cracking (FCC) unit were investigated. To this aim, light cracked naphtha (LCN), heavy cracked naphtha (HCN) and a PolyNaphtha (PN) oligomerisation product were cracked under a wide range of operating conditions over a commercial Y zeolite based equilibrium catalyst. Experimental data were acquired in three different units: a fixed bed bench scale unit, a fixed fluidised bed unit and an adiabatic circulating fluidised bed pilot plant. It was shown that FCC naphthas require high operating severities to crack, and that even then their conversion remains relatively moderate. Hence, direct recycling to the main riser does not seem a viable pathway to increase propylene product. Feeding FCC naphthas to a second reaction zone operating at high severity allows to increase the propylene yield in a significant manner. Increasing conversion, however, not only leads to higher LPG and propylene yields, but also results in very high dry gas yields. An alternative scheme was proposed, in which the olefinic C4 and C5 fractions are converted into a naphtha fraction through oligomerisation in a dedicated unit before being recracked in the secondary riser. As the highly olefinic oligomerised effluent mainly consist of dimerised and trimerised butenes and pentenes, this feed is more easily cracked and high conversions can be achieved. This indirect interconversion of butenes and pentenes into propylene therefore effectively allows to convert these butenes and pentenes into propylene, resulting in a significant increase in propylene yield. Each of the three main naphtha recycle options (directly to the main riser, directly to a secondary riser or indirectly via a light olefin oligomerisation unit) have been analysed and compared to a base case. In the evaluation of each of these schemes, all heat balance effects, both on the riser and the regenerator side, have been accounted for. The proposed process scheme with an indirect recycle via an oligomerisation unit enhances the already inherent flexibility of the FCC unit. The naphtha recycle can be turned on or off, the second reaction zone can be used to crack naphtha or to crack resid feed to maximise throughput, while the effluent of the oligomerisation unit can be recycled to the FCC unit for propylene production or hydrogenated and sent to gasoline and kerosene pool. 相似文献