Method for making crude boric acid from borate and sulfuric acid

Details Method for making crude boric acid from borate and sulfuric acid Method for making crude boric acid from borate and sulfuric acid

1978-03-31

1979-05-29

Sebastian, Leland A.

Compositions

Fire-extinguishing

Foam-stabilizant or colloid-stabilizant containing

423283, C09K 328

Patent

active

041566548

ABSTRACT:
For the conversion of sodium tetraborate (e.g. "5 mole borax" or sodium tetraborate pentahydrate) to a solid, particulate mass of flame-retardant chemical, a slurrying amount of water (e.g. 3-5 moles per mole of tetraborate) is first added, so that a stable slurry can be formed. Then 0.95 to 0.98 mole of sulfuric acid is added to the slurry, and the tetraborate is substantially converted to a moist, particulate mixture of boric acid and sodium sulfate, the water in the slurry having been largely driven off as steam. The moist particulate mixture is suitable for imparting flame retardency to cellulosic insulation; preferably, however, it is first dried to <20 wt.-% moisture.

REFERENCES:
patent: 3917801 (1975-11-01), Wilson

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