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目前,用异丁烷(iC_4)脱氢制取甲基叔丁基醚(MTBE)的原料异丁烯和用丙烷(C_3)脱氢制丙烯的烷烃脱氢工艺在石化工业中开始崭露头角。现简介Lummus、UOP、Phillips、Snamprogetti、Linde5个公司已工业化并发许可证的丙烷和异丁烷脱氢工艺。原料:5个公司均以流化催化裂化(FCC)或 相似文献
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作为燃料的碳四馏分被用于生产高附加值产品,可以提高企业的竞争能力.河北新欣园能源股份有限公司碳四精细一体化装置中的丁烷异构单元和脱氢单元可以将正丁烷转化成异丁烷,再经脱氢单元制取异丁烯.目前公司以异丁烯为原料生产甲基叔丁基醚(MTBE)和乙二醇单叔丁基醚(ETB),增加了公司的竞争力,增强了公司产品的多样化.新增以异丁烯为原料的醋酸叔丁酯项目,为碳四馏分中的异丁烯下游产品开发奠定基础. 相似文献
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邹盛欧 《精细与专用化学品》1987,(8)
美国空气产品与化学品公司开发了以原料异丁烷制甲基叔丁基醚(MTBE)的技术,即 Houdry Catofin 工艺。得克萨斯石油化学制品公司采用此工艺进行异丁烷脱氢。该工艺首先将异丁烷脱氢,得到异丁烯混合物。通过特定的催化剂及设备,获得高收率异丁烯。以前制取 MTBE 受异丁烯量 相似文献
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分析了气体分馏、甲基叔丁基醚(MTBE)、烷基化装置的工艺特点,针对各装置特点对传统流程进行了评价,认为传统流程存在缺陷,未能有效地实现物料最优化、效益最大化,并就此提出了通过改进工艺流程(现有MTBE原料增加脱异丁烷塔、改变气分碳四塔操作控制方案,塔顶轻碳四不再控制烷/烯比,烷基化原料改为异丁烷和重碳四两路进料),实现改进后碳四组分利用更合理、运行能耗更低、产品质量更优、效益更好等目标,有效提高碳四利用水平。 相似文献
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综述了单组分轻质烷烃的裂解性能、炼厂干气和液化气净化、分离技术及在国内石油化工企业的利用情况。针对炼厂实际干气和液化气组成,分析了干气、各类液化气经处理、加工后作为裂解原料的优劣。分析认为,干气经过净化、分离后得到的C2烷烯烃是理想的乙烯低成本生产原料;加氢裂化、重整液化气含有大量丙烷,剩余C4中含有一定数量的正丁烷,但这些物料中不同程度地含有异丁烷,导致乙烯、丁二烯烃收率下降,因此在实际生产中应根据企业裂解原料的自给情况,结合液化气、石脑油以及烯烃的价格变化及时进行测算再确定利用方案;从组成看,焦化液化气含有大量的丙烷、丙烯,而异丁烷少,是潜在的优质烯烃原料,应加强利用。 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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混合碳四来自丁二烯抽提装置和MTBE装置生产的含炔碳四、炼厂轻烃回收装置生产的重碳四,该部分碳四经过全加氢饱和其中的烯烃和炔烃后可作为裂解原料。混合碳四中烯烃含量(摩尔分数)较高,通常占65%以上。随着装置运行,烯烃在反应器中聚合、结焦,长时间累积会堵塞催化剂孔道,造成催化剂活性下降,床层压差升高,影响产品质量和装置运行,需要停车再生催化剂。分析了再生过程,评价了再生结果,为装置后续运行提供了理论基础。 相似文献
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A new technique is introduced allowing simultaneous in situ MAS NMR investigations of hydrocarbon conversions on solids under
flow conditions and on-line gas chromatography. For adsorption of methanol on zeolite HBeta, equal amounts of adsorbed molecules
were determined by both analytical methods. Studying the synthesis of methyl tertiary-butyl ether (MTBE) on zeolite HBeta
using an MAS NMR rotor reactor, a constant yield of MTBE of Ymtbe= 27% was obtained up to a weight hourly space velocity of 1.4 h-1. The variation of the reaction temperature led to a simultaneous change of the 13C MAS NMR signals of isobutoxy species and of the yield of MTBE determined by on-line gas chromatography which indicates that
isobutoxy species act as chemically active compounds. In this first application, the new in situ technique has demonstrated
its advantage for a simultaneous investigation of compounds with a long residence time on the catalyst surface and of compounds
rapidly leaving the catalyst surface.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
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分析了煤基混合碳四的组成,结合煤制烯烃项目的产品特点和市场情况,提出了适合煤基混合碳四深加工的两种综合利用方案:甲基叔丁基醚/1-丁烯+烯烃转化方案和甲基叔丁基醚/1-丁烯+2-丙基庚醇方案,分别介绍了两种方案的建设规模、产品方案和工艺流程,并从投资、技术经济、装置能耗、技术特点等方面进行了对比,总结出两种方案适宜的建设条件。 相似文献
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通过对甲基叔丁基醚分馏塔的工艺模拟,找出了进料中甲醇与烃类组分含量对MTBE产品质量的影响及其与塔操作压力和温度之间的规律。 相似文献
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高密度烃燃料合成与复配研究进展 总被引:2,自引:0,他引:2
概述了高密度烃燃料的研发情况,对包括双环类、三环类、金刚烷类、笼状烃类等在内的高密度烃燃料的性能特征与合成方法进行了较为详细的阐述,对其中难以单独作为燃料使用的高密度烃复配研究情况进行了总结,并对这几类高密度烃燃料的优缺点及应用前景作出了评价。 相似文献
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《Separation and Purification Technology》2002,26(2-3):147-163
Reactive distillation is a hybrid process where chemical reaction and distillative separation are performed in a single equipment. Even though reactive distillation could increase the selectivity of the desired product by the selective reaction this is not always true as shown in this work. A study on the MTBE reaction system using two coupled reactive distillation columns to separate a C4 crack mixture is carried out, where methanol acts as reactive entrainer and MTBE is the intermediate product. In the first column, isobutene and methanol react to form MTBE hence separating the inert C4 component, while in the second column MTBE splits back to methanol and isobutene. Methanol is recycled back to the MTBE formation column and isobutene is obtained as a product. This coupled process with direct recycle of methanol is possible only if no side reactions occur. When the side reactions are taken into account, byproducts such as diisobutene, dimethyl ether and water will be produced so that higher purity methanol can not be obtained at the bottom of the splitting column. The outlet of the splitting column must be firstly separated rather than being recycled directly to the formation column. Moreover, an attempt has been made to show how the selectivity of the desired product isobutene can be critically influenced by the operating parameters such as the reflux ratio. If the reflux ratio increases, a high quantity of diisobutene and dimethyl ether will be obtained which seriously affects the selectivity of isobutene. The influence of operating parameters is investigated by using a continuation method, which shows that bifurcation behavior can appear in both MTBE formation and decomposition process. 相似文献