Patent ID: 11926639
Assignee: BASF SE
Field: Organic fine chemistry (Chemistry)
Classification: CPC C  Y | IPC C

Claim 0:
1. A process for preparing oligo ethylene give ether borate, comprising:
feeding boric acid and oligo ethylene glycol monomethyl ether into a reactor and reacting a resulting mixture to obtain a raw product which comprises oligo ethylene glycol methyl ether borate, water, unreacted boric acid, and unreacted oligo ethylene glycol monomethyl ether;
(b) feeding the raw product to a reactive distillation device and reacting the unreacted boric acid with the unreacted oligo ethylene glycol monomethyl ether for full conversion of boric acid;
(c) transferring a distillate stream containing the water from a top of the reactive distillation device to a condenser and recycling a condensed liquid stream to the top of the reactive distillation device; and
(d) withdrawing a bottom product stream containing the oligo ethylene glycol methyl ether borate from the reactive distillation device, transferring part of the bottom product stream to a reboiler and recycling a resulting vapor stream to a bottom section of the reactive distillation device.