The Continuously Craft Research Of 3, 4-Dichlorophenyl Isocyanate

3,4—Dichlorophenyl Isocyanate(3,4—DCPI) is the important organic reaction intermediate that mainly used in the urea class weed killer, pesticidesynthesis and certain medicine syntheses intermediates. Recent years because of increasing demand, establishment large-scale continuously craft is the urgent need. This article unifies the actual situation, and slightly tries through the flow simulation, to design 100 tons/year experimental equipment, carries on the and debugs the equipment after the experimental installment, has carried on experimental, and has conducted the research to the isocyanogen diethylene glycol dinitrate reaction kinetics.First, through the consult literature and the actual situation, formulated 3,4 -phenyl-dichloride bases isocyanogen diethylene glycol dinitrate continuously to melt the production the flow: 3, 4 - dichloraniline dissolve with the toluene, the liquid carbonyl chloride and 3, 4 - dichloraniline solutions passes over the cold reactor,then gradually passes through thermal response 1, 2, 3, inflow actinic fluid storage tank; Has determined the production main restraint condition and the operating condition: The system load, the carbonyl chloride allocated proportion, the solvent allocated proportion, the system pressure, various reactors temperature and stirs the rotational speed. Through ASPEN and PROII software simulating, and the union actual situation design the continuously experimental equipment of 3, 4 - Dichlorophenyl Isocyanate for 100 tons/years.Then,afeter the continuously experimental equipment of 3, 4 - Dichlorophenyl Isocyanate has been made, carries on the equipment setup and the debugging. Debugs the equipment, first run operation using the pure solvent in to equipment under the condition to carry on the test. Afterwards, has carried on under the different operating condition.Finally, through to the experimental test result reorganization and analysis, may recognize the continuously experimental equipment of 3, 4 - Dichlorophenyl Isocyanate continuously craft to be completely feasible. And through experiment have found the more superior operating condition of the continuously craft:(table presses) 10~20KPa in the system pressure. The system load of 3 , 4-Dichlorophenyl Isocyanate is 150 tons/years. The cold reactor temperature 30~40℃. The rotational speed of the cold reactor stirs is 750 r/min. the first thermal response temperature 80 °C. The rotational speed of first thermal response stirs is 200r/min. Second thermal response temperature is 90~100℃, The rotational speed of second thermal response...