Method for the production of hydrogen-bis(chelato) borates and alkali metal-bis(chelato)borates

摘要

Methods are described for the production of hydrogen-bis(chelato)borates of the general formula H[BL¹L²] and of alkali metal-bis(chelato)borates of the general formula M[BL¹L²] where M=Li, Na, K, Rb, Cs L¹=-OC(O)-(CR¹R²)_n-C(O)O- or -OC(O)-(CR³R⁴)-O- where n=0 or 1, R¹, R², R³, R⁴ independently of one another denote H, alkyl, aryl or silyl, L²=-OC(O)-(CR⁵R⁶)_n-C(O)O- or -OC(O)-(CR⁷R⁸)-O- where n=0 or 1, R⁵, R⁶, R⁷, R⁸ independently of one another denote H, alkyl, aryl or silyl, wherein the respective raw materials are mixed in solid form without the addition of solvents and are reacted. Lithium-bis(oxalato)borate, lithium-bis(malonato)borate, caesium-bis-(oxalato)borate, caesium-bis-(malonato)borate and the mixed salts lithium(lactato,oxalato)borate and lithium(glycolato,oxalato)borate for example may be produced in this way.