FIELD: chemistry.
SUBSTANCE: invention relates to production of stable aqueous solutions of N-aminomethylene derivatives of amides of carboxylic acids, particularly stabilised aqueous solutions of N,N'-bis(dimethylaminomethyl)-urea. The method involves reaction of aqueous solutions of dimethylamine, formaldehyde and urea in stoichiometric ratios at temperature of 5-50°C. Aqueous solutions of formaldehyde and dimethylamine are mixed and held for not more than 0.5 hours, and aqueous urea solution and 50% ethylene glycol solution in methanol is added to the formed reaction mixture in amount of not less than 0.01 mole ethylene glycol per mole of dimethylamine.
EFFECT: invention prolongs the shelf life of N,N'-bis(dimethylaminomethyl)-urea.
1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR PREPARING N, N'-BIS-(DIMETHYLAMINOMETHYL)UREA | 2005 |
|
RU2311406C2 |
| METHOD OF OBTAINING N, N'-BIS[DIMETHYLAMINOMETHYL](THIO)UREA | 2012 |
|
RU2518490C2 |
| 2,4,6-TRIS(N,N-DIMETHYLAMINOMETHYL)PHENOL PRODUCTION PROCESS | 1998 |
|
RU2146245C1 |
| METHOD OF PREPARING MIXTURE OF PHENOL MANNICH BASES | 1998 |
|
RU2146666C1 |
| METHOD OF PREPARING 2,5-N,N′-(DIMETHYLAMINOMETHYL)-1-4- HYDROQUINONE | 1994 |
|
RU2089539C1 |
| METHOD OF PREPARING 2-(N,N-DIMETHYLAMINOMETHYL)PHENOL | 1998 |
|
RU2144529C1 |
| METHOD FOR PREPARING N,N,N',N'-TETRAMETHYL-1,2- AND -1,3-PROPYLENEDIAMINES | 2004 |
|
RU2290396C2 |
| METHOD OF PREPARING N,N'-SUBSTITUTED PIPERAZINES | 1998 |
|
RU2157804C2 |
| METHOD OF OBTAINING COPPER [N,N'-BIS(DIMETHYLAMINOMETHYL)-THIOUREA OXALATE]SULFATE PENTAHYDRATE AS PREPARATION FOR FIGHTING SOIL AND SEED-SURFACE INFECTION | 2012 |
|
RU2536404C2 |
| METHOD OF PRODUCTION OF N,N-DIMETHYL-(3,5-DI-TERT-BUTYL-4-OXYBENZYL)-AMINE | 1988 |
|
SU1596699A1 |
