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

A process for the production of hydrogen-bis(chelato)borates of the formula H[BL1L2] comprising:

• mixing starting compounds H2L1 and H2L2 with an oxidic boron compound without adding a solvent to form a heterogeneous mixture, reacting the heterogeneous mixture and optionally introducing water with the raw materials, and removing water formed during the reaction, wherein
• L11 is selected from the group consisting of —OC(O)—(CR1R2)n—C(O)O— or —OC(O)—(CR3R4)—O—;
• R1, R2, R3 and R4 are independently selected from the group consisting of H, alkyl, aryl or silyl;
• L2 is selected from the group consisting of —OC(O)—(CR5R6)n—C(O)O— and —OC(O)—(CR7R8)—O—,
• R5, R6, R7 and R8 independently selected from the group consisting of H, alkyl, aryl and silyl;
• H2L1 is selected from the group consisting of H—OC(O)—(CR1R2)n—C(O)O—H and H—OC(O)—(CR3R4)—O—H;
• and
• H2L2 is selected from the group consisting of H—OC(O)—(CR5R6)n—C(O)O—H or H—OC(O) (CR7R8)—O—H (=H2L2);
• wherein H2L1 and H2L2 are optionally the same;
• and n is 0 or 1.

A process for the production of alkali metal-bis(chelato)borates of the formula M[BL1L2] comprising:

• mixing an alkali metal boron oxide with H2L1 and H2L2 without the addition of solvents to form a heterogeneous mixture, reacting the heterogeneous mixture, and removing the water optionally introduced with the raw materials and water formed during the reaction wherein:
• M is selected from the group consisting of Li, Na, K, Rb and Cs;
• L1 is selected from the group consisting of —OC(O)—(CR1R2)n—C(O)O— and —OC(O)—(CR3R4)—O—;
• R1, R2, R3 and R4 are independently selected from the group consisting of H, alkyl, aryl and silyl;
• L2 is selected from the group consisting of —OC(O)—(CR5R6)n—C(O)O— or —OC(O)—(CR7R8)—O—,
• wherein R5, R6, R7 and R8 independently selected from the group consisting of H, alkyl, aryl and silyl;
• wherein n is 0 or 1.

A process for the production of alkali metal-bis(chelato)borates of the formula M[BL1L2] comprising mixing M2L1 and H2L2 or MHL1 and H2L2 with an oxidic boron compound without the addition of solvents to form a heterogeneous mixture;

• reacting the heterogeneous mixture;
• and
• removing water optionally introduced with the raw materials and water formed during the reaction;
• wherein
• M is selected from the group consisting of Li, Na, K, Rb, and Cs;
• L1 is —OC(O)—(CR1R2)n—C(O)O— or —OC(O)—(CR3R4)—O— wherein R1, R2, R3 and R4 independently selected from the group consisting of H, alkyl, aryl and silyl;
• L2 is —OC(O)—(CR5R6)n—C(O)O— or —OC(O)—(CR7R8)—O—, wherein R5, R6, R7 and R8 are independently selected from the group consisting of H, alkyl, aryl and silyl, and wherein n is 0 or 1.