Method of making crude boric acid from borate and sulfuric acid

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

1979-03-12

1981-09-15

Lovering, Richard D.

Compositions

Fire retarding

For wood or cellulosic material other than textile

252 62, 423283, 428921, C09K 328

Patent

active

042896622

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, using little or no water, 0.95 to 0.98 mole of sulfuric acid is added to convert the tetraborate to a moist, particulate mixture of boric acid and sodium sulfate. The moist particulate mixture is suitable for imparting flame retardancy to cellulosic insulation; preferably, however, it is first dried to <20 wt.-% moisture.

REFERENCES:
patent: 1804417 (1931-05-01), Herting
patent: 1950106 (1934-03-01), Franke
patent: 2113248 (1938-04-01), Berg
patent: 2948592 (1960-08-01), May
patent: 3650690 (1972-03-01), Shiloff
patent: 3983040 (1976-09-01), Draganov
patent: 4156654 (1979-05-01), Blasius
patent: 4172804 (1979-10-01), Christianson et al.

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