The Study On Optimizing The Ratio Of Nitrochlorobenze By Continous Heat Insulation Nitration

The nitro chlorobenzene (is mainly to the neighborhood, nitro chlorobenzene) is an important chemical raw materials, widely used in dyes, pigments, the medicine, the agricultural chemicals, rubber additives, engineering plastic fine chemical field.In this paper, according to the company’s existing technology, in room temperature nitration legal nitro chlorobenzene single kettle test and continuous optimization experiment test foundation, USES of adiabatic technology focused adiabatic nitrification nitro chlorobenzene process research synthesis, and discussed the mixed acid composition, the ratio of raw materials, reaction temperature, moisture to the influence of adiabatic nitration and corrosion resistance materials selection was conducted. The experimental results show that the best small adiabatic nitration reaction parameters for:m(p):m(H2SO4)=4:1. total acid in the amount of nitric acid content is1%, m (HNO3):m (chlorobenzene)=1:1. reaction temperature130～135℃. To neighbors for1.24than isomers byproduct of two tanner, only0.116%.Adiabatic nitrification process parameters for the pilot right:m (p):m (H2SO4)=2.2:1,90KPa vacuum control. To neighbors than in1.35, two tanner content is0.8%or so, the nitro phenolic for500mg/1or so, to further improve the product quality.The pilot in the condition of equipment material corrosion situation of the test, the selection ultimately chose four fluorine pipe line and the self-developed acid porcelain plate, with KP1daub lining of the reaction kettle. Thus for comprehensive assessment the feasibility of mass production provides production experience and the scientific basis.With an annual capacity of50000tons of nitro chlorobenzene device technology business accounting, make the technological process and operation procedures, product test results:to adjoining isomers than from the original1.95:1drop to1.5:1, meet the demand of market, increase the enterprise economic benefits.