Patent ID: 7674911

Claim:
A process for the production of hydrogen-bis(chelato)borates of the formula H[BL 1 L 2 ] comprising: mixing starting compounds H 2 L 1 and H 2 L 2 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 L 1 is selected from the group consisting of —OC(O)—(CR 1 R 2 ) n —C(O)O— or —OC(O)—(CR 3 R 4 )—O—; R 1 , R 2 , R 3 and R 4 are independently selected from the group consisting of H, alkyl, aryl or silyl; L 2 is selected from the group consisting of —OC(O)—(CR 5 R 6 ) n —C(O)O— and —OC(O)—(CR 7 R 8 )—O—, R 5 , R 6 , R 7 and R 8 independently selected from the group consisting of H, alkyl, aryl and silyl; H 2 L 1 is selected from the group consisting of H—OC(O)—(CR 1 R 2 ) n —C(O)O—H and H—OC(O)—(CR 3 R 4 )—O—H; and H 2 L 2 is selected from the group consisting of H—OC(O)—(CR 5 R 6 ) n —C(O)O—H or H—OC(O) (CR 7 R 8 )—O—H; wherein H 2 L 1 and H 2 L 2 are optionally the same; and n is 0 or 1.