142-28-9Relevant articles and documents
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Krenzel' et al.
, (1959)
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Laser-Initiated Chain Reactions of Chlorine with Propane and Cyclopropane in Amorphous Films at 77 K
Sedlacek, Arthur J.,Mansueto, Edward S.,Wight, Charles A.
, p. 6223 - 6229 (1987)
Free radical reactions of chlorine with propane and cyclopropane deposited as amorphous thin films at 77 K have been investigated.Reactions are initiated by pulsed laser photolysis of the chlorine molecules at 308 nm.Product yields and branching ratios have been determined by Fourier transform infrared absorption spectroscopy of the films following irradiation.The Cl2/propane system is characterized by low product yields consistent with a local radical recombination mechanism.However, the Cl2/cyclopropane reaction proceeds via a true chain reaction mechanism involving ring opening of the hydrocarbon.The dominant product of the reaction is the anti,anti conformer of 1,3-dichloropropane.Product yields have been determined as a function of the mole fraction of chlorine in binary mixtures of the reagents.The results are consistent with a simple statistical model for free radical trapping in nonreactive sites within the amorphous films.
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Levaillant
, (1936)
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Morgan,Burstall
, p. 1497,1500 (1930)
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Preparation method of dichloroalkane
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Paragraph 0019, (2021/02/10)
The invention discloses a preparation method of dichloroalkane, which comprises the following steps: mixing diol, a catalyst and a solvent, stirring and heating the components, introducing HCl gas into the mixture, and carrying out reflux reaction for 3-5 hours; and after the reaction is finished, treating the reaction solution to obtain dichloroalkane. According to the preparation method providedby the invention, the catalyst ammonium chloride is added, so that the reaction speed is obviously increased, and side reactions are reduced. In the invention, a large amount of solvent water is added in the reaction process, so that on one hand, the formation of monochloro ether by-products can be effectively inhibited, a water phase can be directly and repeatedly used, and basically no sewage is discharged; besides, by using the oil-water separator, the dichloroalkane product can be effectively separated, the product purity is high, and the yield is high.
Continuous method for preparation of dihalogenated alkane from diol compound
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Paragraph 0044-0050, (2020/03/16)
The invention discloses a continuous method for preparation of dihalogenated alkane from a diol compound. A diol compound and haloid acid are used as the substrate, a microchannel reactor is utilizedto synthesize dihalogenated alkane continuously. Synthesis of the dihalogenated alkane includes the steps of: inputting the diol compound and haloid acid into a mixer respectively by a metering pump at room temperature, conducting premixing, then sending the mixture into a high-temperature section of the microchannel reactor at for reaction, and controlling the reaction temperature by an externalcirculating heat exchange system; at the end of the reaction, letting the product flow out from an outlet of the microchannel reactor and enter a cooling section, letting the cooled material enter a liquid separation kettle for standing and liquid separation, and collecting an organic layer; and preheating the organic layer, then feeding the preheated organic layer into a rectifying tower by a metering pump, controlling the temperature and reflux ratio of a reboiler, and collecting fractions at a specific temperature, thus obtaining the target product in a product collecting tank. The method provided by the invention has the characteristics of high reaction efficiency, safety, environmental protection, convenience and rapidity.
PROCESS FOR HYDROGENATING DICHLOROISOPROPYL ETHER
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Page/Page column 5, (2016/04/20)
Convert dichloroisopropyl ether into a halogenated derivative by contacting the dichloroisopropyl ether with a source of hydrogen and a select heterogeneous hydrogenation catalyst under process conditions selected from a combination of a temperature within a range of from 50 degrees centigrade (oC) to 350 oC, a pressure within a range of from atmospheric pressure (0.1 megapascals) to 1000 pounds per square inch (6.9 MPa), a liquid feed volume flow to catalyst mass ratio between 0.5 and 10 L/Kg*h and a volume hydrogen / volume liquid ratio between 100 and 5000 ml gas/ ml liquid. The halogenated derivative is at least one of 1-chloro-2-propanol and 1,2-dichloropropane 1, and glycerin monochlorohydrin.