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Showing 1 to 20 of 69 for “"Butene"”.
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Improvement of propylene yield via butene metathesis
… demand, One of the technologies available is 1-butene metathesis, which describes a one-step process where isomerisation of 1-butene to 2-butene followed by cross-metathesis taking place. Products of the cross metathesis are propene and 2-pentene. In addition ethene and 3-hexene are expected as …
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Zeolites for Cleaner Processes: Alkylation of isobutane and n-butene
… transfer rate and the ratio of isobutane to n-butene: P/ O) concentration in the vicinity of the catalyst. For a given P/O feed ratio, achieving close to plug flow for isobutane and high back-mixing for n-butene further enhances local P/O ratio and yield. Furthermore, optimal zeolite catalyst …
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Mechanistic tracer studies of a synthetic mica-montmorillonite: n-butene isomerizations
… rearrangements of the carbons) of the n-butenes were employed as the probe reactions. Product analyses were performed via gas chromatography and mass spectroscopy. The reaction products distribution was kinetically controlled, which suggests the possibility of a metastable intermediate. …
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Oxidation of butene over platinum catalysts in a zirconia-yttria electrochemical reactor
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1986.
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Kinetics of the reaction of chloromethyl methyl ether with 2-methyl-1-butene
Includes bibliographical references.
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Kinetics of the reaction of chloromethyl methyl ether with 2-methyl-1-butene
Includes bibliographical references.
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The gaseous compressibility of isobutane, the vapor pressures, critical constants, and gaseous compressibility of butene-1
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1943.
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The Mechanism of Chemoprotection by 1-Cyano-2-Hydroxy-3-Butene, a Natural Component of Cruciferous Vegetables
In a final study, CHB was found to mediate a monofunctional DNA-directed increase in GST subunit Ya$\sb2,$ Yc$\sb2$ and QR mRNA levels, without a concomitant increase in mRNA levels of CYP 1A. This suggests that, in the previous study, the protection afforded against aflatoxin-induced …
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Morphology, Crystallization and Melting Behaviors of Random Copolymers of Ethylene with 1-Butene, 1-Pentene and 1-Hexene
… three types of copolymers studied - ethylene/1-butene, ethylene/1-pentene and ethylene/1-hexene - were found to be identical to each other, suggesting that the crystallization process examined was independent of branch type for the ethyl, propyl and butyl branches examined. Since the lengthy …
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Morphology, Crystallization and Melting Behavior of Statistical Copolymers of Propylene with Ethylene, 1-Butene, 1-Hexene and 1-Octene
… copolymers (propylene/ethylene, propylene/1-butene, propylene/1-hexene and propylene/1-octene) has been examined. The multiple melting behavior has been correlated with the presence of alpha and gamma phases and with the occurrence of cross-hatching morphology. The Crystallization and melting …
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Rotationsspektroskopische und quantenchemische Studien zur Methyltorsion in halogenierten Dimethylethenen
… (1-halogeno-2-methylpropene, E-2-halogeno-2-butene, and Z-2-halogeno-2-butene) have two internally rotating methyl groups. Using MB-FTMW-spectroscopy the splittings of the rotational transition caused by internal rotation and nuclei quadrupole coupling were resolved. By analyzing the observed …
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A study of miscibility, morphology, crystallization and melting behavior of isotactic poly(propylene) in blends of poly(propylene) and poly(1-butene)
… of blends of polypropylene (PP) and poly(l-butene) (PB1) will be reexamined. The driving force for this study is the fact that contradictory conclusions on this subject exist in the literature. In this thesis, the glass transition behavior, morphology, spherulite growth rate and melting …
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A study of active sites on fibrillar alumina catalysts
… and isomerization/ deuterium exchange of n-butenes were used as test reactions to investigate both the concentration and chemical nature of active sites on two kinds of fibrous alumina catalysts. The results of this investigation are comparable to results reported in the literature …
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Alumina-supported palladium and palladium/copper catalysts: Characterization and use for selective hydrogenation of 1,3-butadiene
… studied in the presence of a 10:1 excess of 1-butene over supported bimetallic catalysts containing palladium in a vapor-phase atmospheric plug flow reactor in the temperature range 299-313 K. Copper addition to alumina-supported Pd increases its selectivity for converting butadiene to …
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Conversion of methyl ethyl ketone (MEK) to valuable chemicals over multifunctional supported catalysts
… part discusses the direct conversion of MEK to butene over supported copper catalysts (Cu-Al₂O₃, Cu-zeolite Y sodium (Cu-ZYNa) and Cu-zeolite Y hydrogen (Cu-ZYH)) in a fixed bed reactor. In this reaction, MEK is hydrogenated to 2-butanol over metal sites, and further dehydrated on acid sites to …
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Conversion of n-pentenes over H-ZSM-5
… of I-pentene provides the feed stock 2-methyl-2-butene and 2-methyl-I-butene for the production of tertiary amyl methyl ether (TAME), an octane booster for petrol. Benzene, toluene, xylenes and ethylbenzene (BTX+EB) are good or even better octane boosters, although the use of benzene is limited …
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Selective ethylene dimerization by a nickel-exchanged metal-organic framework catalyst
Short linear [alpha]-olefins such as 1-butene are valuable commodity chemicals due to their use as comonomers in linear low-density polyethylene. Presently only homogeneous systems are used to catalyze ethylene dimerization in industry, causing many to suffer from quick deactivation and poor …
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Reduced molybdenum oxidation states in hydrodesulfurization catalysis by Chevrel phases
… benzothiophene hydrodesulfurization (HDS) and 1-butene hydrogenation (HYD). These materials have been found to have HDS activities comparable to, or greater than, model unpromoted and cobalt-promoted MoS[subscript]2 catalysts; in contrast, Chevrel phases exhibit low activities for 1-butene …
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