FIELD: chemistry.
SUBSTANCE: organic solvent is used as the extractant in the processes of obtaining or using aniline, with content of aniline in the solvent of 5% mass. Putting the extractant and the water solution into the extractor is done counter-flow. Recovery of the solvent is done through distillation of the obtained extract with obtaining of a residue, containing 10-40% mass of organic solvent. In particular, benzol can be used as the organic solvent, a by-product of the process of obtaining aniline through recovery of nitrobenzol using hydrogen. Recovery of the solvent is done in a distillation column for separating the by-product benzole from the fraction in the process of obtaining aniline.
EFFECT: lowering of heat consumption in the process of recuperating aniline from concentrated solutions by 11-13 times.
2 cl, 2 ex
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