| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: invention relates to a method of producing piperazinophenols, involving reaction of piperazine, N-(-aminoethyl)piperazine, N-(-benzylaminoethyl)piperazine or N,N1-bis-(piperazinoethyl)ethylenediamine with a Mannich base in an aqueous medium at temperature 90-110C in molar ratio of piperazine, N-(-aminoethyl)piperazine, N-(-benzylaminoethyl)piperzine:Mannich base equal to 1:0,8-2, N,N1-bis-(piperazinoethyl)ethylenediamine:Mannich base equal to 1:2 or 1:4 until release of dimethylamine stops; as well as aminomethylation of piperazine or N-(-aminoethyl) piperazine with diphenylol propane (DPP) in the presence of formaldehyde (FA) in an aqueous medium with molar ratio piperazine: FA: DPP equal to 1:1:1 or 1:2:2 at temperature 50-90C for 4-10 hours. Reactants react in the presence of a surfactant in amount of 2-6% of the weight of the starting piperazine, and the surfactant used is neonol, OP-7, OP-10. ^ EFFECT: ensuring fire safety of the process, high output of the end product which can be used as antioxidant phenol stabilisers. ^ 1 cl, 13 ex |
