| abstract |
(57) Abstract: The present invention provides a process for obtaining a high yield without the operation of the high purity of the organic onium QMF n salt recrystallization. SOLUTION: A general formula NH 4 MF n (M is a periodic table 4-1) Represents an element of group 6; n is 3 or 4, if group 4; 5, if group 5, 4, 6 or 7, if group 7, 3 or 5, if group 7; 3 or 4, 8 or 9 or 3 or 5 or 10 or 3 or 11 or 3 or 13 or 4 or 6, or 5 or 15 or 13 or 4 or 6 or 14 respectively. Is 4 or 6, when the compound is of the 16th group, and 5 when the compound is of the 16th group). Reacting a salt represented by OH (Q represents an organic onium) in a solution, wherein the organic onium salt represented by a general formula QMF n (Q and M have the same meanings as the above formula) Production method. |