【文章內(nèi)容簡介】 instead of the catalytic oxidation of dhea dhea butadiene production. Oxidation rate of dhea production butadiene oneway 70% selectivity for 80 39。92 percent. Our successful development in the 1960s dinitramine oxidation production technology, butadiene dhea bees the main method of butadiene in production. ethylene plant in C isolated butadiene fractionsPetroleum hydrocarbons steam cracking is the production of ethylene, propylene, butadiene, etc, and the important method in the separation of ethylene and propylene and separated from cracking C fractions., which contains a lot of butadiene, is the main raw material, production of butadiene by C distillate is currently producing butadiene separation method of butadiene and the vast majority of the world. The product is with a butadiene method of production. Due to C in distillate close with the boiling point of butadiene extraction distillation can be separated. By using different solvents under different methods: furfural, acetonitrile method, DMF, methyl ethyl amide, n. a methyl pyrrole method, etc. Widely used in industry is acetonitrile method, DMF and N a methyl pyrrole method. acetonitrile methodThe earliest Shell pany developed by the United States in 1956 and industrial production. It is to cut 10% acetonitrile solvent (AC, the extraction, braising, pression, high pressure, low desorption desorption and solvent recovery process units. 1977 Shel pany in renovation of the condenser and increased, and water tower and low voltage braising desorption gas bined pression. About 8% by condensation water tower to wash the solvent distillation column gas phase returns, raw materials from the C C hydrocarbon gases. The rest of hydrocarbon to high tower. Another part as desorption transformation reboiler gas extraction distillation tower bottom to provide heat. Eliminating a transformation reboiler, reduces the steam. Rinse about 1% to bottom solvent refined, the solvent recovery system to ensure the quality of circular solvent. GuiTing high content of raw materials needed by the precision processing, or hydrogenation distillation and extraction of two to get high purity of butadiene. Currently, this method in Italy and Japan JSR process technology SIR represented.Italy in aqueous 5% SIR ACN solvent, using 5 tower processes (ammonia washing tower, first extraction distillation and extraction distillation, off the light and heavy) off. In the first extraction distillation before washing tower, add a ammonia removal raw materials used in % % (quality percentage of aldehydes ketones). GuiTing extraction distillation tower from the first 75 pieces tower, to contact effluence lateralline plate condenser. Dropping tower and condenser bottom bottom, the material bined heat recovery after the raw material for the evaporator. Not only can make butadiene yield reached 96% 39。98 percent also can make butadiene and GuiTing separation, butadiene and product purity can reach above. This technique % characteristic is simple and solvent extraction column in the next section desorption pleted by two first extraction distillation, feeding, favorable renovation thermal coupling technique, is the second extraction distillation column of steam. All contain butadiene without condensation directly into dropping tower. Also will drop off heavy tower from the middle part of the fluid flow out on the tray, sent to the second extraction distillation tower, such as fluid backflow second extraction distillation column condenser, this section does not need to add to the heat off all the tower, heavy bottom were coupled heat load capacity about 40% lower before, so as to achieve further energysaving. In 1988, the transform