TH14979A - Processes and tools for preparation 1,2-dichloroethane by direct addition of chlorine - Google Patents

Abstract

If in the reaction of ethylene and chlorine to form 1,2-dichloroethane (EDC), which uses a catalyst Reactions containing sodium chloride and iron (III) chloride at a molar ratio of less than 0.5, the resulting EDC is of sufficiently high purity to permit the direct conversion to vinyl chloride. By keeping the stated mole ratio, the reaction can be of great advantage in Equipment term and power consumption, for example by vaporizing some EDC in the expansion container

Claims (9)

1. Process for preparation 1,2-dichloroethane By the reaction of ethylene with chlorine in the presence of a sodium chloride-ion (III) chloride catalyst, which consists of maintaining the number ratio. The moles of sodium chloride to iron (III) chloride ranged from 0.3 to below 0.5 during the whole reaction. 2. The process referred to in claim 1, where the molar ratio of sodium chloride to (III) chloride ions is from 0.3 to 0.45. 3. The process referred to in any one or two claim, in which the reaction takes place from 50 to 105 ํ the ideal is in the range from 70 to 90 ํ. 4. The process referred to in one or more of the above claims. In which the reaction is done at High pressure, ideal gauge pressure 1 bar is from gage pressure 0.4 to 0.6 bar. 5. The process referred to in claim 4, where the pressure gauge is arranged by covering with inert gas. 6. The procedure referred to in one or more of the above claims. All or part of the 1,2-dichloroethane passes through the vessel, which is maintained at reduced pressure. That product which distilled Were taken separately and remaining 1,2-dichloroethane that is recycled in that process 7. The process referred to in one or more of the above claims. Where the medium of that reaction is 1,2-dichloroethane. Circulating 8. The procedure referred to in one or more of the above claims. Which feeds chlorine into a gas 9. Instrument for performing such a process referred to in one or more of the above claims. Which consists of reactor (1), feed line (2) and (3) for ethylene and chlorine respectively, line (5) to expansion vessel (6) which has line (7) for Removal of vaporized product and line (8) for non-vaporized product backflow, and line (11) for return of Partial flow of the product to the reactor (1) that 1 0.The instrument referred to in claim 9, which has one or more of the following characteristics: line (4) to reactor (1) for inert gas, melting vessel (9) which is connected to line (8). ), In-line pump (10) (8), in-line pump (12) (11), cooler or heat exchanger (13) between pump (12) and reactor (1) in line (7) connected. From the chiller (14), which has a line (16), leads to the receptacle -EDC (17) in line (7) towards the end of the cooler (14) with a vacuum pump (15), a line (18) from the unit The vacuum pump (15) follows the compressor (19) to the reactor (1) and the waste gas line (20) and (21).