583-48-2Relevant academic research and scientific papers
Lewis-Pair-Mediated Selective Dimerization and Polymerization of Lignocellulose-Based β-Angelica Lactone into Biofuel and Acrylic Bioplastic
Hong, Miao,Wang, Xiao-Jun
supporting information, p. 2664 - 2668 (2020/01/24)
This contribution reports an unprecedentedly efficient dimerization and the first successful polymerization of lignocellulose-based β-angelica lactone (β-AL) by utilizing a selective Lewis pair (LP) catalytic system, thereby establishing a versatile bio-refinery platform wherein two products, including a dimer for high-quality gasoline-like biofuel (C8–C9 branched alkanes, yield=87 %) and a heat- and solvent-resistant acrylic bioplastic (Mn up to 26.0 kg mol?1), can be synthesized from one feedstock by one catalytic system. The underlying reason for exquisite selectivity of the LP catalytic system toward dimerization and polymerization was explored mechanistically.
Production of cellulosic gasoline: Via levulinic ester self-condensation
Li, Zheng,Otsuki, Andrew L.,Mascal, Mark
supporting information, p. 3804 - 3808 (2018/08/22)
Most biomass to biofuel processes are limited to the production of linear or minimally branched hydrocarbons. Motor gasoline, however, consists of highly branched linear and/or cyclic alkanes. This work describes the optimization of the levulinic ester self-condensation reaction and the efficient conversion of its products, which are highly branched cyclopentadienes, into a mixture of substituted cyclopentanes with high octane ratings and excellent density and flow properties.
Oligomerization of 1-butene with a homogeneous catalyst system based on allylic nickel complexes
Behr,Bayrak,Peitz,Stochniol,Maschmeyer
, p. 41372 - 41376 (2015/05/27)
The oligomerization of 1-butene with a nickel-based catalyst system constitutes an elegant synthesis method for obtaining linear octenes from readily available chemicals. It is well known that the bis-(cyclooctadiene)nickel(0)-complex (Ni(COD)2) can be used in combination with 1,1,1,5,5,5-hexafluoroacetylacetone (hfacac) forming [Ni-1] as a catalyst for the dimerization of 1-butene, which produces a linear octene yield of 75-83% at reaction temperatures between 70-80 °C. We are the first to demonstrate that it is also possible to use allylic nickel complexes in combination with hfacac to produce linear octenes with a selectivity of 70% under very mild reaction conditions and at low catalyst concentrations. Additionally the catalyst can be formed simply by adding the activator hfacac to a solution of the allylic nickel complex. No complicated synthesis or purification is needed.
Copper-catalyzed oxidative homo- and cross-coupling of grignard reagents using diaziridinone
Zhu, Yingguang,Xiong, Tao,Han, Wenyong,Shi, Yian
supporting information, p. 6144 - 6147 (2015/01/09)
Transition-metal-catalyzed cross-coupling reactions are among the most powerful synthetic transformations. This paper describes an efficient copper-catalyzed homo- and cross-coupling of Grignard reagents with di-tert-butyldiaziridinone as oxidant under mild conditions, giving the coupling products in good to excellent yields. The reaction process has a broad substrate scope and is also effective for the C(sp)-C(sp3) coupling.
Nickel-catalyzed cross-coupling of alkyl zinc halides for the formation of C(sp2)-C(sp3) bonds: Scope and mechanism
Phapale, Vilas B.,Guisan-Ceinos, Manuel,Bunuel, Elena,Cardenas, Diego J.
supporting information; experimental part, p. 12681 - 12688 (2010/06/12)
Optimal conditions for a general Ni-catalysed Negishi cross-coupling of alkyl zinc halides with aryl, heteroaryl and alkenyl halides have been determined. These conditions allow the reaction to take place smoothly, with low catalyst loading, and in the pr
Alkylation process with recontacting in settler
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Page/Page column 3-5, (2008/06/13)
A system and/or process for decreasing the level of at least one organic fluoride present in a hydrocarbon phase contained in an alkylation settler by contacting the hydrocarbon phase with an HF containing stream, containing greater than about 80 wt. % and less than about 94 wt. % HF, in the intermediate portion of the settler which contains at least one tray system, with each tray system comprising a perforated tray defining a plurality of perforations and a layer of packing below the perforated tray, are disclosed.
Disproportionation of hydrocarbons
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Page 2, (2010/02/07)
A novel hydrocarbon disproportionation process is provided and includes contacting a hydrocarbon feed comprising at least one paraffin with a disproportionation catalyst comprising a support component, a metal, and a halogen in a disproportionation reaction zone under disproportionation reaction conditions.
Catalyst and process for contacting a hydrocarbon and ethylene
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Page 17-18, (2008/06/13)
A process of contacting at least one feed hydrocarbon, containing three to about seven carbon atoms per molecule, and ethylene in a hydrocarbon-containing fluid in the presence of a catalyst composition to provide at least one product hydrocarbon isomer containing about four to about nine carbon atoms per molecule is provided. The at least one feed hydrocarbon can be selected from paraffins, isoparaffins, and the like and combinations thereof. The catalyst composition contains a hydrogen halide component, a sulfone component, and a metal halide component.
Alkene oligomerization process
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Page 5-6, (2008/06/13)
A process for oligomerising alkenes having from 3 to 6 carbon atoms which comprises contacting a feedstock comprising a) one or several alkenes having x carbon atoms, and, b) optionally, one or several alkenes having y carbon atoms, x and y being different, with a catalyst containing a zeolite of the MFS structure type, under conditions to obtain selectively oligomeric product containing predominant amounts of certain oligomers. The process is carried out at a temperature comprised between 125 and 175° C. when the feedstock contains only alkenes with 3 carbon atoms and between 140 and 240° C., preferably between 140 and 200° C. when the feedstock contains comprises at least one alkene with 4 or more carbon atoms.
Mechanism of reaction of n-butane with but-2-enes in the presence of LaCaX faujasites
Bachurikhin, A. L.,Mortikov, E. S.,Gribanov, V. Yu.,Abronin, I. A.
, p. 783 - 788 (2007/10/03)
The reactions of n-butane and an n-butane (80 mol. percent)-isobutane (20 mol. percent) mixture with but-2-enes in the presence of polycationic PdLaCaX faujasites were studied. Quantum-chemical calculation of the enthalpies of formation of alkanes C4-C8 a
