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
Title | Year | Author | Number |
---|---|---|---|
PROCESS FOR PURIFYING BENZENE-CONTAINING AMILANE | 1993 |
|
RU2084446C1 |
PROCESS FOR RECOVERY OF DEHYDRATED DIETHYLHYDROXYLAMINE FROM MIXTURE OF WATER AND DIETHYLHYDROXYLAMINE | 1992 |
|
RU2080319C1 |
ANILINE PRODUCING METHOD | 0 |
|
SU529761A1 |
PROCESS FOR ISOLATING ACETIC ACID FROM AQUEOUS SOLUTIONS OF HOMOLOGS | 0 |
|
SU910587A1 |
METHOD OF PREPARING ALKYL-TERT-ALKYL ETHERS | 1992 |
|
RU2068838C1 |
METHOD OF OBTAINING ETHYL TERT-BUTYL ETHER | 2006 |
|
RU2327682C1 |
METHOD FOR SEPARATING VINYL ACETATE AND METHANOL | 0 |
|
SU1313849A1 |
N-METHYLANILINE ISOLATION PROCESS | 2000 |
|
RU2167851C1 |
METHOD FOR PREPARING HIGH-OCTANE PRODUCT | 2004 |
|
RU2265588C1 |
METHOD OF PROCESSING ISOBUTENE-CONTAINING HYDROCARBON MIXTURE | 2005 |
|
RU2319686C2 |
Authors
Dates
1997-02-10—Published
1993-12-14—Filed