The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 14, 1982
Filed:
Sep. 22, 1980
Allen S Adams, Jasper, FL (US);
Michael B Caesar, Lake City, FL (US);
Occidental Chemical Corp., White Springs, FL (US);
Abstract
An apparatus useful for the preparation of phosphoric acid from phosphate rock and a strong acid, comprises a closed vessel, a draft tube, means connected to the inner walls of said vessel amd mounting said draft tube in a vertical position within said vessel, an agitator positioned within said draft tube, a shaft for said agitator mounted axially of said vessel and extending into said draft tube, an inlet conduit to said vessel for introducing a feed slurry (e.g. phosphate rock and strong acid) into said vessel, said inlet conduit preferably having a lower end portion terminating within said draft tube and wherein, said draft tube has an outwardly flared lower skirt portion terminating in the bottom portion of said vessel, and preferably including a vent pipe connected to said inlet conduit to reduce foaming generated by the reaction in said vessel and to prevent blockage of said inlet conduit, and including means for applying air, under pressure, to the bottom of said reactor and/or under the bottom of said lower skirt portion, to prevent settling of undissolved solids.