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:
Jul. 07, 1981
Filed:
May. 26, 1978
Applicant:
Inventors:
Fernando Ore, Whittier, CA (US);
John D Ellis, Huntington Beach, CA (US);
James H Moore, La Verne, CA (US);
Assignee:
Occidental Petroleum Corporation, Los Angeles, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
C01F / ; C01B / ;
U.S. Cl.
CPC ...
423167 ; 423319 ; 423320 ;
Abstract
Phosphoric acid is prepared from phosphate rock and sulfuric acid by using a reaction train comprising a dissolving slurry and a crystallization slurry maintained at different sulfate levels. Both inter and intra vessel circulation are used at high rates to minimize reagent concentration gradients and temperature gradients and provide a suitable crystallization environment. Preferably, the intra vessel circulation is substantially in plug flow, as through a draft tube.