Patent · US Expired

Foam control during production of phosphoric acid

US4391784A · kind A · utility

2Cited by
3References
5Claims
0Family size

Inventors

Key dates

Filing dateAug 18, 1981
Grant dateJul 5, 1983
Priority date—
Expiry dateAug 18, 2001

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC01B25/225
  • WIPO fieldMaterials, metallurgy
  • WIPO sectorChemistry

Abstract

Foam generated during the digestion of phosphate rock is removed from the slurry either by overflow, mechanical sweeps, or by vacuum from strategically located nozzles connected to vacuum lines. The foam, after liquefaction, is returned to the filter where it results in improved filtration and return of soluble P.sub.2 O.sub.5.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.