共查询到19条相似文献,搜索用时 140 毫秒
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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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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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粗异戊烯产自浙石化50万t/a裂解C5分离装置,年产8.8万t/a,粗异戊烯经过加氢后可作为汽油、乙烯原料或与甲醇反应生成高纯度的异戊烯。浙石化粗异戊烯可通过石脑油加氢装置、汽油加氢装置、S-Zorb装置加工。在石脑油加氢装置加工时,粗异戊烯进入拔头油作为乙烯原料送乙烯,解决了粗异戊烯因烯烃含量高不能直接送乙烯加工的问题;在汽油加氢装置加工时,粗异戊烯作为轻汽油馏分送至汽油醚化装置与甲醇反应,增加了工艺附加值;在S-Zorb装置加工时,由于粗异戊烯中的二烯烃自聚,使原料/反应产物换热器管程堵塞,造成偏流及换热效果下降,不能长期加工。 相似文献
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为了合理利用炼厂C5馏份中的烷烃与烯烃资源,同时也为了开拓TAMA(甲基叔戊基醚)的生产原料异戊烯(主要是2-甲基-1-丁烯和2-甲基-2-丁烯)的新来源,对石油炼制中生成的C5馏份进行全组分异构烯烃化处理获取异戊烯已成为近年来众人关注的课题。本文对C5馏份全组分异构烯烃化处理中必将遇到的正戊烷异构制异戊烷、异戊烷脱氢制异戊烯和正戊烯异构制异戊烯等几个主要过程的催化反应原理、催化剂研究状况及工艺过程开发情况进行了全面的分析与评述。 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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Experimental liquid-liquid equilibrium data obtained at 25 and 35°C for ternary mixtures of MTBE + ethanol + water, and at 25, 35 and 45°C for ternary mixtures of TAME + ethanol + water, were satisfactorily fitted with NRTL and UNI-QUAC equations using the correlation program developed by Sørensen (1980). 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