Production of boric oxide

Details Production of boric oxide Production of boric oxide

1993-11-24

1995-06-13

Langel, Wayne

Chemistry of inorganic compounds

Boron or compound thereof

Oxygen containing

501 49, C01B 3510

Patent

active

054240522

ABSTRACT:
Amorphous boric oxide-containing product having about 85 to 92% B.sub.2 O.sub.3 is produced by heating boric acid at an elevated temperature of up to about 275.degree. C. to dehydrate the boric acid and form a molten glass which is cooled to a solid glassy product. This solid glass can be comminuted to produce a particulate product. Preferably the boric acid is heated at 220.degree. to 275.degree. C., with about 250.degree. to 270.degree. C. being most preferred. The process is readily adapted to a continuous process in which the boric acid is placed on a moving continuous steel belt and conveyed through a heating zone. The molten glassy product is cooled to form a solid glassy product which is removed from the belt and comminuted to a desirable particle size range.

REFERENCES:
patent: 3479137 (1969-11-01), Campbell, Jr. et al.
patent: 3582272 (1971-06-01), Stanton
patent: 4243423 (1981-01-01), Hohman
patent: 5194337 (1993-03-01), Yoshida et al.

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