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Nitrobenzene wastewater use centrifugal extraction solvent extraction effect research

by:Deyuan      2020-09-08
Nitrobenzene is a kind of important chemical raw materials, processed can synthesize between nitrate nitrochlorobenzene between between benzene sulfonic acid, nitrobenzene, such as the dye, medicine, pesticide intermediates, but in the process of production will produce large amounts of nitrobenzene wastewater, this kind of wastewater is difficult to be biodegradable in the nature, the ecological and environment caused serious damage.

with the increase demand of nitrobenzene compounds, nitrobenzene wastewater emissions also more and more big, therefore, the treatment of nitrobenzene wastewater by solvent extraction method, reduce the harm of waste water, implementation of nitrobenzene recycling has important significance.

centrifugal extraction machine plays an important role in nitrobenzene wastewater treatment, extraction company launched. cwl - zhengzhou days M series centrifugal extraction machine is developed aiming at the disadvantages of traditional centrifugal extraction machine, under the same processing conditions, the series of centrifugal extraction machine power consumption is only 10% ~ 30% of traditional ring gap model. Centrifugal extraction machine at the same time, the remaining time is short, split phase quickly, high extraction efficiency, save the investment cost and solvent recycling fee.

nitrobenzene wastewater treatment, using cyclohexane and fatty acid methyl ester as extraction agent for experiments, cyclohexane as extraction solvent extraction effect is superior to fatty acid methyl ester. Nitrobenzene wastewater removal, cyclohexane and nitrobenzene wastewater according to certain proportion into the centrifugal extraction machine, with the aid of the rotation of the drum, the two-phase mixing and dispersing quickly, and two phase solution fully mass transfer, mixing and mass transfer process. After mixing liquid under the action of vortex disk into the rotary drum, in under the action of centrifugal force, two phase realize quick separation, clarification of two phase fluid respectively through their weir plate into the collection chamber and the tube was closed to derivation, respectively, to complete the two phase separation process.

in the operation of extraction, extraction solvent regeneration problems, directly affect the feasibility of extraction. So after extraction need to carry on the back extraction of organic load, the extractant recycling use again. The low cyclohexane boiling point, and nitrobenzene atmospheric pressure boiling point is 210. 9 ℃, so the regeneration of cyclohexane distillation method, nitrobenzene can be separated from cyclohexane.

related extraction equipment figure:



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