- Method used for preparing chloropropene using microchannel reactors
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The invention relates to a method used for preparing chloropropene using microchannel reactors, and more specifically relates to a method used for preparing 1, 1, 2, 2, 3-pentachloropropane or 1, 2, 2, 3-tetrachloropropane via reaction of raw material 1, 2, 3-trichloropropene or 2, 3-dichloropropene with chlorine respectively in Corning microchannel reactors. The method comprises following steps: under light source irradiation (in preparation of 1, 1, 2, 2, 3-pentachloropropane from 2, 3-dichloropropene, light source irradiation is not necessary), chloropropene and chlorine are subjected to preheating to reaction temperature respectively, and then are introduced into a first microchannel reactor for mixing and reaction; an obtained mixture is introduced into a subsequent microchannel reactor or 2 to 4 microchannel reactors connected in series so as to obtain a chloropropene flow. Compared with the prior art, the method comprises following advantages: technology is simple; less three wastes is generated; accurate control of reaction conditions can be realized; yield is high; reaction time is short; and continuous production can be realized.
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Paragraph 0046-0050
(2017/05/18)
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- Compositions comprising 2,3,3,3-tetrafluoropropene, 1,1,2,3-tetra-chloropropene, 2-chloro-3,3,3-trifluoropropene, or 2-chloro-1,1,1,2-tetrafluoropropane
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The present disclosure relates to compositions comprising 2,3,3,3-tetrafluoropropene that may be useful as heat transfer compositions, aerosol propellants, foaming agents, blowing agents, solvents, cleaning agents, carrier fluids, displacement drying agents, buffing abrasion agents, polymerization media, expansion agents for polyolefins and polyurethane, gaseous dielectrics, extinguishing agents, and fire suppression agents in liquid or gaseous form. Additionally, the present disclosure relates to compositions comprising 1,1,2,3-tetrachloropropene, 2-chloro-3,3,3-trifluoropropene, or 2-chloro-1,1,1,2-tetrafluoropropane, which may be useful in processes to produce 2,3,3,3-tetrafluoropropene.
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Page/Page column 5
(2016/05/09)
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- PROCESS FOR THE PRODUCTION OF CHLORINATED PROPENES
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Processes for the production of chlorinated propenes are provided. The processes make use of 1,2-dichloropropane as a starting material and subject a feedstream comprising the same to an ionic chlorination process. At least a portion of any tri- and tetrachlorinated propanes not amenable to ionic chlorination conditions are removed from the ionic chlorination product stream, or, are subjected to chemical base dehydrochlorination step. In this way, recycle of intermediates not amenable to ionic chlorination reactions is reduced or avoided, as is the buildup of these intermediates within the process. Selectivity and, in some embodiments, yield of the process is thus enhanced.
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Paragraph 0086; 0087; 0088
(2014/07/08)
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- SULFURYL CHLORIDE AS CHLORINATING AGENT
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The use of sulfuryl chloride, either alone or in combination with chlorine, as a chlorinating agent is disclosed.
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Paragraph 0091-0095
(2013/07/05)
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- PROCESS FOR THE PRODUCTION OF CHLORINATED PROPANES AND/OR PROPENES
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Processes for the production of chlorinated propanes and/or propenes are provided. The present processes make use of methylacetylene, a by-product in the production of ethylene and/or propylene, as a low cost starting material, alone or in combination with propadiene, propene and/or propane. In the latter embodiments, the processes may also be utilized to provide a substantially pure stream of propane.
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Paragraph 0078
(2013/06/05)
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- PROCESS FOR THE PRODUCTION OF CHLORINATED PROPENES
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Processes for the production of chlorinated propenes are provided. The present processes make use of a feedstock comprising 1,2,3-trichloropropane and chlorinates the 1,1,2,3-tetrachloropropane generated by the process prior to a dehydrochlorination step. Production of the less desirable pentachloropropane isomer, 1,1,2,3,3-pentachloropropane, is thus minimized. The present processes provide better reaction yield as compared to conventional processes that require dehydrochlorination of 1,1,2,3-tetrachloropropane prior to chlorinating the same. The present process can also generate anhydrous HCl as a byproduct that can be removed from the process and used as a feedstock for other processes, while limiting the production of waste water, thus providing further time and cost savings.
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Page/Page column 0064; 0065
(2013/03/26)
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- PROCESS FOR THE PRODUCTION OF CHLORINATED PROPENES
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Processes for the production of chlorinated propenes are provided. The present processes make use of a feedstock comprising 1,2,3-trichloropropane and chlorinates the 1,1,2,3-tetrachloropropane generated by the process prior to a dehydrochlorination step. Production of the less desirable pentachloropropane isomer, 1,1,2,3,3-pentachloropropane, is thus minimized. The present processes provide better reaction yield as compared to conventional processes that require dehydrochlorination of 1,1,2,3-tetrachloropropane prior to chlorinating the same. The present process can also generate anhydrous HCl as a byproduct that can be removed from the process and used as a feedstock for other processes, while limiting the production of waste water, thus providing further time and cost savings.
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Paragraph 0071; 0072
(2013/03/26)
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- PROCESS FOR THE PRODUCTION OF CHLORINATED PROPENES
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Processes for the production of chlorinated propenes are provided. The present processes make use of 1,2-dichloropropane, a by-product in the production of chlorohydrin, as a low cost starting material, alone or in combination with 1,2,3-trichloropropane. The present processes can also generate anhydrous HCl as a byproduct that can be removed from the process and used as a feedstock for other processes, providing further time and cost savings. Finally, the processes are advantageously conducted in the liquid phase, thereby presenting additional savings as compared to conventional, gas phase processes.
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Page/Page column 19-20
(2013/02/28)
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- PROCESSES FOR PREPARING 1,1,2,3-TETRACHLOROPROPENE
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Provided is a continuous process for preparing 1,1,2,3-tetrachloro-1-propene having the steps of catalytically dehydrochlorinating CH2ClCCl2CH2Cl in the gas phase to produce CHCl═CClCH2Cl; chlorinating the CHCl═CClCH2Cl to form CHCl2CCl2CH2Cl; and catalytically dehydrochlorinating the CHCl2CCl2CH2Cl in the gas phase to form CCl2═CClCH2Cl.
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Page/Page column 2
(2009/02/11)
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- CHLORINATION OF 2,3-DICHLOROPROPENE
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Polychlorohexanes and polychlorohexenes C6H8Cl6, C6H7Cl5, and C6H8Cl4 are formed as side products in the chlorination of 2,3-dichloropropene with molecular chlorine.
- Lebedev, V. V.,Virin, L. I.,Treger, Yu. A.,Levanova, S. V.,Semenov, S. G.,et al.
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- KINETIC CHARACTERISTICS OF SUBSTITUTIONAL CHLORINATION OF TETRACHLOROPROPANE IN PRESENCE OF DICHLOROPROPENE.
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The purpose of this investigation is to determine the kinetic characteristics of this process, which are to form the basis of a model of the chlorination reactor. It is found that the activation energy E equals 43. 22 plus or minus 1. 78 kJ/mole for the reaction of substitutional chlorination of TCP in presence of DCP is considerably lower than the activation energy of thermal chlorination (83. 7-104. 7 kJ/mole), confirming the existence of an inductive effect in additive chlorination in a system of concurrent reactions I and II.
- Evstigneev,Levanova,Berlin,Rodova,Lebedev
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p. 1372 - 1376
(2007/10/02)
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