[EN] PROCESS FOR PREPARING OLIGO ETHYLENE GLYCOL METHYL ETHER BORATE<br/>[FR] PROCÉDÉ DE PRÉPARATION DE BORATE D'ÉTHER MÉTHYLIQUE D'OLIGOÉTHYLÈNEGLYCOL
申请人:BASF SE
公开号:WO2021104982A1
公开(公告)日:2021-06-03
The present invention relates to a process for preparing oligo ethylene glycol methyl ether borate comprising the steps of: a) feeding boric acid and oligo ethylene glycol monomethyl ether into a reactor (10) and reacting the resulting mixture to obtain a raw product which comprises oligo ethylene glycol methyl ether borate, water and unreacted boric acid and oligo ethylene glycol monomethyl ether; b) feeding the raw product to a reactive distillation device (30) and reacting boric acid with oligo ethylene glycol monomethyl ether to full conversion of boric acid; c) transferring a distillate stream containing water from the top of the reactive distillation device (30) to a condenser (34) and recycling a condensed liquid stream to the top of the reactive distillation device (30); and d) withdrawing a bottom product stream containing oligo ethylene glycol methyl ether borate from the reactive distillation device (30), transferring part of the bottom product stream to a reboiler (33) and recycling the resulting vapor stream to the bottom section of the reactive distillation device (30).