METHOD OF ANILINE REFINING Russian patent published in 1997 - IPC

Abstract RU 2072983 C1

FIELD: chemical technology. SUBSTANCE: product: aniline synthesized by catalytic reduction of nitrobenzene with hydrogen is subjected for refining by separation for an aqueous and aniline layers, heteroazeotropic aniline layer drying, separation of the obtained distillate, vacuum rectification of anhydrous semiproduct in two sequential columns; bottom layer or unseparated emulsion of heteroazeotropic drying distillate is fed to the separation with the parent aniline. If necessary, mixing with distillate from the second column is carried out before feeding to the separation. EFFECT: improved method of refining. 4 ex, 1 dwg

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RU 2 072 983 C1

Authors

Savel'Ev N.I.

Khitrov N.V.

Zharikov L.K.

Shkuro V.G.

Smirnov Ju.N.

Dates

1997-02-10Published

1993-12-14Filed