16136-85-9Relevant academic research and scientific papers
2, 3, 3, 3-tetrafluoropropene method for the synthesis of
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Paragraph 0022, (2018/01/19)
The invention discloses a method for synthesizing 2,3,3,3-tetrafluoropropene and belongs to the field of organic synthesis. The method comprises the following steps: (1) preparing 2-chloropropene from 1,2-dichloropropane, which serves as a raw material, through continuous catalytic cracking by adopting a fixed bed in the presence of beta-zeolite, which serves as a catalyst; (2) selectively chlorinating 2-chloropropene with chlorine gas under the catalysis of ferric chloride, so as to prepare 2,3,3,3-tetrachloropropylene; and (3) fluorating 2,3,3,3-tetrachloropropylene with hydrofluoric acid under the catalysis of SbF3 or SbF5, thereby obtaining 2,3,3,3-tetrafluoropropene. The synthesis route has the advantages that the source of raw materials is wide, the cost is low, and the product yield is high; and the obtained product can serve as an automotive air conditioning refrigerant and has a positive significance in reduction of greenhouse effect.
PROCESS FOR THE PRODUCTION OF CHLORINATED PROPANES AND/OR PROPENES
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Paragraph 0059-0061, (2013/06/05)
Processes for the production of chlorinated propenes are provided wherein the feedstream comprises 1,2-dichlropropane. The present processes make use of at least one reactor twice, i.e., at least two reactions occur in the same reactor. Cost and time savings are thus provided. Additional savings can be achieved by conducting more than two chlorination reactions, or all chlorination reactions, in one chlorination reactor, and/or by conducting more than two dehydrochlorination reactions, or all dehydrochlorination reactions, within a single dehydrochlorination reactor.
Dehydrochlorination of 1,2-dichloropropane by CO2 laser-induced breakdown; comparison with thermal elimination
Ouchi, Akihiko,Sakuragi, Masako
, p. 2249 - 2255 (2007/10/03)
Dehydrochlorination of 1,2-dichloropropane (DCP) was conducted by thermal elimination and CO2 laser-reduced dielectric breakdown, which was induced by focusing the 10.6 μm lines of a CO2 TEA laser. Thermal dehydrochlorination proceeded by a four-centered mechanism at > 425 °C and by a surface-catalyzed radical process at 2000 °C.
KrF Excimer Laser-induced Dehydrochlorination of 1,2-Dichloropropane
Ouchi, Akihiko,Niino, Hiroyuki,Yabe, Akira,Kawakami, Haruhiko
, p. 917 - 920 (2007/10/02)
Dehydrochlorination of 1,2-dichloropropane was conducted with and without irradiation of KrF excimer laser (248 nm).It afforded four products, cis-1-, trans-1-, 2-, and 3-chloropropene.The reaction was remarkably accelerated with irradiation of laser especially at the low temperatures.
Collisional Energy Transfer in Thermal Decomposition Reaction of 1,2-Dichloropropane
Yun, Sun Jin,Jung, Kyung-Hoon,Kang, Wee-Kyeong
, p. 5842 - 5847 (2007/10/02)
The thermal decomposition reaction of 1,2-dichloropropane (1,2-DCP) was studied at temperatures from 663.2 to 703.2 K over the pressure range 0.04-10.0 Torr.The decomposition modes of 1,2-DCP were monitored via four reaction channels of unimolecular HCl eliminations and a negligible portion of a side radical chain reaction. 3-Chloropropene (3-CP), cis-1-chloropropene (cis-1-CP), trans-1-chloropropene (trans-1-CP), and 2-chloropropene (2-CP) were produced.Rate parameters for the thermal processes found in this study are k3(3-CP)/s-1=1013.61 +/- 0.30exp-1/RT>, kcis(cis-1-CP)/s-1=1012.90 +/- 0.70exp-1/RT>, ktrans(trans-1-CP)/s-1=1013.21 +/- 0.80exp-1/RT>, k2(2-CP)/s-1=1013.05 +/- 0.44exp-1/RT>, and ktot(total)/s-1=1013.70 +/- 0.50exp-1/RT>.The unimolecular thermal decomposition reactions of the four-channel 1,2-DCP system were carried out in the presence of a He bath gas to evaluate intermolecular-energy-transfer parameters.The average energies removed per collision from energized 1,2-DCP by bath gas are as follows: by the substrate, 1200 cm-1 for the stepladder model; by He, 250 cm-1 for the exponential model.The effects of active additives, CO2 and HCl, and the surface condition of the reaction vessel were also studied to ascertain the potential properties of the thermal decomposition reaction of 1,2-DCP.
REDUCTION OF SOME POLYHALOGENATO- AND POLYACETOXYALLYLIC COMPOUNDS WITH TRIBUTYLTIN HYDRIDE IN THE PRESENCE OR ABSENCE OF A PALLADIUM CATALYST I. REDUCTION OF DICHLORO- AND DIACETOXY-PROPENES
Guibe, Francois,Zigna, Anne-Marie,Balavoine, G.
, p. 257 - 266 (2007/10/02)
Radical-promoted tributyltin hydride reduction of 3,3-dichloropropene, (Z)-1,3-dichloropropene, or (E)-1,3-dichloropropene yields a mixture of the three possible regio-stereoisomeric monochloropropenes.The palladium-catalyzed reduction yields regiospecifically the two stereoisomeric 1-chloropropenes with a Z/E ratio which remains constant whatever the starting dichloropropene but which is not the thermodynamic ratio.The results are against a radical mechanism and strongly support a polar ?-allyl mechanism for the catalytic reactions.
Bestimmung der Geschwindigkeitskonstanten der Reaktion von 1CH2 mit Fluor- und Chlorethen
Simon, F. G.,Heydtmann, H.
, p. 543 - 545 (2007/10/02)
The rate constants for the addition of 1CH2 to fluoroethene and chloroethene have been determined using the known rate constant for the reaction of 1CH2 with ketene.The experiments yielded the results k4a(296 K) = (8.2 -/+ 0.6)E13 cm3 mol-1 s-1 k4b(296 K) = (2.9 -/+ 0.4)E13 cm3 mol-1 s-1. - Keywords: Chemical Kinetics / Gases / Photochemistry / Radicals
Polyfunctionalized N-Tensides. VII. Substitution and Elimination in the Reaction of 1,2-Dihalogenoalkanes with Amines
Beger, J.,Meerbote, E.
, p. 12 - 22 (2007/10/02)
1,2-Dichloroalkanes, 1,2-Dibromoalkanes and mixtures of 1-bromo-2-chloroalkanes and 1-chloro-2-bromoalkanes react with primary or secondary amines and give both elimination and substitution products, often in a nearly 1:1 proportion.The elimination products are the cis and trans-1-halo-1-alkenes, the 2-halo-1-alkenes, the 1,3- and 2,4-dienes and the 1-alkenes.The main substitution products are the 1,2-bis-aminoalkanes.Physical dates, 1H-n.m.r.-spectra,surface tension values and CMC-dates are given.
