共查询到17条相似文献,搜索用时 125 毫秒
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正 《精细与专用化学品》1996,(17)
LIOP公司开发了一种用异戊烷生产叔-戊基甲基醚(TAME)的Oletlex脱氢技术。TAME是比汽油掺混剂MTBE更有吸引力的代用品,但异戊烷的价格高于丁烷。尽管如此,由于TAME的Reid蒸汽压比MTBE的低,因此,此产品对炼油厂更有吸引力,所以,UOP公司开发研究了用异戊烷脱氢制TAME的技术。 相似文献
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甲基叔戊基醚( TAME)和甲基叔丁基醚( MTBE)均为燃料醚, MTBE是人们最为熟悉的燃料醚,从 1997年美国环保局( EPA)批准其在无铅汽油中使用以来,已在美国的调合汽油中使用,而欧洲从 1973年起在汽油中使用。 TAME具有 MTBE的所有优点,甚至更类似于汽油。在所有的醚中, TAME在环保方面作用最大,它能减少尾气排放污染,并将汽油中某些易挥发的反应性高的 C5烯烃转化成 RVP非常低的燃烧洁净的醚。由于添加 TAME可降低汽油的 RVP,这就使炼油厂在今后满足 RVP的控制规定方面有更大的灵活性,调入汽油的量更多… 相似文献
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环境保护的需要,许多国家都相继对汽油的使用标准进行立法,使用清洁汽油。MTBE,TAME等醚类产品是二十一世纪清洁汽油最理想的稳定剂,近期内尚无其它产品可以取代。 相似文献
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介绍了SPC-01型催化剂在甲基叔戊基醚(TAME)裂解生产异戊烯中的工业应用。该催化剂具有良好的活性和稳定性,TAME转化率和异戊烯的选择性均超过99%。利用X射线衍射(XRD)、热重分析(TG-DTA)、红外光谱(FT-IR)和孔结构分析对新鲜的和从装置卸出的催化剂进行表征,并对催化剂活性下降的机理进行了讨论。结果表明,在长周期运行中,催化剂比表面下降、结焦和酸性的损失是导致催化剂活性降低的主要原因,最后提出了TAME裂解催化剂的改进方向。 相似文献
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1 前言 当前世界各国对环保问题更加关注,对汽油质量的要求越来越高,把汽油中的轻组分(C_5、C_6烯烃)转化为挥发性更低、辛烷值更高并且含氧的燃料组分是必然的选择。自联邦德国石油化学公司1982年首先开始工业试验装置的研究工作以来,世界上已有10多家公司报道了他们在醚化工艺的开发和应用情况。10多年来,叔戊基甲基醚(TAME)的开发和应用有了很大的进展,据有关资料报道,1993年美国TAME生产能力已达40多万t,其余国家的生产能力总 相似文献
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The octane enhancer tertiary amyl methyl ether (TAME) is produced by liquid phase synthesis from methanol and a mixture of isoamylenes, namely 2-methyl-1-butene and 2-methyl-2-butene, using a sulfonic acid ion exchange resin as catalyst. Three reactions take place simultaneously in TAME synthesis: etherification of the two methylbutenes and their isomerisation. In order to study the equilibrium of the multiple reactions in TAME synthesis, the thermodynamic properties of the compounds in the liquid phase and equilibrium constants were calculated using a modified UNIFAC method to describe the nonideality of the system. Four parameters influencing the equilibrium conversion were derived and discussed in detail. Supplemental experiments were performed at three temperatures in the range from 303 to 343 K and at different initial molar ratios of educts. Equilibrium conversions of methanol were determined from these experiments and compared with calculated values. At 298 K the predicted activity based equilibrium constant was 22.9 for TAME synthesis from 2-methyl-1-butene and 1.6 for TAME synthesis from 2-methyl-2-butene; for isomerisation of 2-methyl-1-butene to 2-methyl-2-butene a value of 14.3 was obtained. 相似文献
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Multiple Analysis in a Reactive Distillation Column for the Synthesis of tert‐Amyl Methyl Ether
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tert‐Amyl methyl ether (TAME) is produced via reactive distillation. A simulation is set up and controlled on Aspen HYSYS v 8.0 for generating the highest purity of TAME. This simulation includes a plug‐flow reactor and a reactive distillation column. Emphasis was put on finding the optimal operating conditions of the reactive distillation column in order to get the maximum purity of TAME. The operational parameters were reflux ratio, number of reactive stages in the distillation column, and condenser pressure. The results indicated the optimal reflux ratio and condenser pressure which could be adapted to industrial scale. 相似文献
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利用C5馏分生产TAME的现状及展望 总被引:8,自引:0,他引:8
甲基叔戊基醚(TAME) 由C5 馏分中的异戊烯和甲醇反应制得。介绍了国外CDTECH、UOP、IFP、ARCO、SNAM、NESTE等公司的TAME工艺技术,其中,催化蒸馏工艺是最先进的。还介绍了国内的TAME研究及开发情况。目前,国内的TAME 还处于起步阶段,只有抚顺建有一套催化裂化轻汽油醚化工业化装置。利用C5 馏分合成TAME 是急待研究、开发的课题。 相似文献
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Yanqing Ma Gongxuan Lu 《Journal of Inorganic and Organometallic Polymers and Materials》2008,18(4):435-440
The supramolecular recognition of Ca(II) and N
α-4-tosyl-l-arginine methyl ester hydrochloride (TAME) with ATP were investigated using 1H and 31P NMR spectra. In the Ca(II)–ATP–TAME ternary system, Ca2+ and TAME bind with ATP via the phosphate chain and adenine ring of ATP. The binding forces are mainly electrostatic and cation
(Ca2+)–π and π–π stacking interaction. Furthermore, the hydrolysis of ATP catalyzed by Ca(II) and TAME was studied at pH 7.0 and
60 °C using 31P NMR spectra. Kinetics studies show that the ATP hydrolysis rate constant is 0.1035 h−1 in the Ca(II)–TAME–ATP ternary system, whereas the value is 8.5 × 10−3 h−1 under the same conditions without TAME and Ca2+. The Ca(II) ions and TAME accelerate the ATP hydrolysis process about 12-fold. The proposed mechanism of ATP hydrolysis catalyzed
by Ca2+–TAME occurs through an addition–elimination reaction sequence. These results can help us get more useful information at the
molecular level about the key amino acid residue(s) and metal ions that serve as cofactors in the ATPase effect on ATP hydrolysis/synthesis. 相似文献
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Development of a petrochemical process from laboratory scale tests to a commercial plant. A plant producing TAME (tertiary amyl methyl ether) and isoamylene serves as an example illustrating the development of a petrochemical process from laboratory scale tests to a commercial size plant. TAME is an anti-knock compound used in unleaded gasoline, and isoamylene is a multi-purpose specialty chemical. In an introduction, the laboratory and pilot plants at EC Erdoelchemie GmbH in Cologne, Germany are presented. Subsequently the main process engineering developments made through experience gained with a semicommercial demonstration plant are discussed. These include optimization of the reactors, design of a methanol extraction unit, and the separation of TAME and high purity isoamylene in specially designed distillation towers. The high degree of coordination during the experimental testing phase to match the requirements of the basic and detail engineering allowed the commercial plant to be started up without expensive modifications within 4 years. The resulting savings overcompensate the costs of the semicommercial plant. 相似文献
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