Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

Continuous-circuit Preparation of Phosphoric Acid from Florida Phosphate Matrix.

Authors
White-JC; Goff-TN; Good-PC
Source
NTIS: PB 293 281 :22 pages
Link
NIOSHTIC No.
10007889
Abstract
A research study was conducted to devise a method for producing phosphoric acid directly from unbeneficiated Florida phosphate matrix. This research was performed as part of the Bureau of Mines, U.S. Department of the Interior, goals of improving minerals and metals recovery from domestic resources and of minimizing the environmental impact associated with mineral recovery operations. This report describes research in which unbeneficiated, dry, south- central Florida phosphate matrix was digested with sulfuric acid in a continuous-circuit, five-tank reactor to yield phosphoric acid and gypsum residue. Feed capacity of the reactor was 100 pounds (45 kg) of dry matrix per 24-hour day. When digestion was carried out at 185 deg f (85 deg c), acid filtration rates of up to 420 pounds of p2o5 per square foot per day were attained. Combined iron and aluminum impurities in the product filter acid were about 60 percent greater than values reported in commercially produced acid derived from concentrate. Phosphate recovery was 87 to 90 percent of the phosphate contained in the as-mined matrix.
Publication Date
19780101
Document Type
IH; Report of Investigation;
Fiscal Year
1978
NTIS Accession No.
PB-293281
NTIS Price
A03
Identifying No.
RI 8326
NIOSH Division
ALRC;
Source Name
NTIS: PB 293 281
State
FL;
TOP