Boron Trifluoride is a highly toxic, colorless gas which fumes in moist air. Boron Trifluoride is used extensively as a catalyst in such diverse operations as isomerization, alkylation, polymerization, esterfication, condensation, cyclization, hydration dehydration, sulfonation, desulfurization nitration, halogenation oxidation and acylation.
Boron Trichloride is used in the refining of aluminum, magnesium, zinc, and copper alloys to remove nitrides, carbides, and oxides from molten metal. It has been used successfully as a soldering flux for alloys of aluminum, iron, zinc, tungsten, and monel. Aluminum castings can be improved by treating the melt with boron trichloride vapors. In the manufacture of electrical resistors, a uniform and lasting adhesive carbon film can be put over a cermic base by a process that has been developed, using the addition of BCl3 to benzene at high temperature. Used in the field of high energy fuels and rocket propellants as a source of boron to raise BTU value.
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