FIELD: chemistry.
SUBSTANCE: invention relates to a method of producing 4,4'-methylenedianiline (MDA). Method involves mixing a solution of formaldehyde in water with a solution of aniline in hydrochloric acid and water in molar ratio of aniline to formaldehyde equal to 2:1, and feeding the reaction mass into microcapillary channels from polytetrafluoroethylene with an inner diameter of 0.1 to 1 mm at temperature of 40 to 55 °C and flow rate from 0.5 to 3 ml/min.
EFFECT: increased yield of MDA, simplified process of synthesis and reduced temperature fluctuations.
1 cl, 1 dwg, 4 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PRODUCING ISOPHORONE IN MICROCAPILLARIES | 2024 |
|
RU2835674C1 |
| METHOD FOR PRODUCING METHYLENED DIPHENYLDIAMINE USING A HETEROGENEOUS CATALYST | 2020 |
|
RU2743925C1 |
| METHOD FOR PRODUCING METHYLENE DIPHENYL DIISOCYANATE | 2020 |
|
RU2750198C1 |
| MODULAR FLOW MICROFLUID REACTOR TO PERFORM CHEMICAL REACTIONS AT HIGH PRESSURE AND TEMPERATURE | 2023 |
|
RU2807773C1 |
| METHOD OF PRODUCING (POLY)DIAMINODIPHENYLMETHANE AND METHOD OF PRODUCING (POLY)DIPHENYLMETHANE DIISOCYANATE | 2022 |
|
RU2832614C2 |
| METHOD OF PRODUCING NITROPHENOLS IN MICROCHANNELS | 2024 |
|
RU2831144C1 |
| METHOD FOR PRODUCING 4-AMINO-1,2,4-TRIAZOLE | 2020 |
|
RU2739325C1 |
| METHOD FOR LIQUID-PHASE CATALYTIC ALKYLATION OF AROMATIC AMINES | 2005 |
|
RU2285691C1 |
| METHOD FOR PRODUCING TIN SALT (IV) FROM TIN SALT (II) | 2022 |
|
RU2797089C1 |
| METHOD FOR PRODUCING (POLY)METHYLENEDIANILINE (OPTIONS) AND METHOD FOR PRODUCING (POLY)POLYMETHYLENE DIISOCYANATE | 2022 |
|
RU2798849C1 |
