Process for the fluorination of boron hydrides
AssigneeAir Products and Chemicals, Inc.
InventorsWilliam Jack Casteel, Jr., Sergei Vladimirovich Ivanov
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Abstract
This invention relates to an improvement in a liquid phase process for the direct fluorination of borohydride salts including the B10H10−2 and B12H12−2 salts wherein said borohydride salt is contacted with fluorine, under conditions for forming said fluorinated borohydride salt. The improvement in the liquid phase process resides in effecting the fluorination of said borohydride salt in the presence of a reaction medium having an acidity between that of water and anhydrous HF. More specifically, the reaction medium should have a Hammett acidity, Ho, between 0>Ho>−11.
Claims22
In a liquid phase process for the direct fluorination of borohydride salts to broadly produce compounds of the formula, Ma[RbZcBdHeFy]k where M is a cation having a valence of from 1-4, R is a halogen or an alkyl group, Z is C, Si, Ge, Sn, Pb, N, P, As, Sb, or Bi;
- B is boron, H is hydrogen, a is 1 or 2;
- b is an integer from 0 to 7;
- c is an integer from 0 to 1;
- d is an integer from 5 to 12;
- e is an integer from 0 to 9;
- y is an integer from 3 to 12 and is 1, 2 or 3 wherein a multiplied by the valence of M is equal to the integer k or 2 times the integer and further wherein said borohydride salt is contacted with fluorine, under conditions for forming said compound, the improvement in the liquid phase process which comprises:
- effecting the fluorination of said borohydride salt in the presence of a reaction medium having an acidity between that of water and neat HF.
In a process for the direct fluorination of borohydride salts to produce the fluorinated borohydride compounds MaB12H(12-y)Fy, the improvement for the production of fluorinated borohydride compounds where y is at at least 10 which comprises:
- effecting the fluorination of the borohydride salt in a reaction medium having an acidity between that of water and neat HF.
Dependencies are inferred from the claim text.