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:
Sep. 11, 1979
Filed:
Feb. 28, 1978
Ulrich Hauschild, Hanover, DE;
Hans-Heinz Kaspers, Grossburgwedel ot Engensen, DE;
Heinrich Rotger, Gehrden, DE;
Kali-Chemie Aktiengesellschaft, Hanover, DE;
Abstract
An alkaline high temperature process for the production of alkali containing highly citrate soluble calcined phosphate fertilizer is disclosed. The process comprises calcining a preheated mixture comprising a crude phosphate, an alkaline decomposing agent, silicic acid and phosphoric acid in a rotary kiln at a temperature of between about 900.degree. and 1300.degree. C. The preheated mixture is prepared by introducing phosphoric acid directly into the kiln and therein contacting it with the hot precursory mixture of the remaining starting material having a temperature of between about 150.degree. to 900.degree. C. The amounts of starting materials are preferably chosen such that in the mixture 1 mole of P.sub.2 O.sub.5 is present per about 1.1 to 1.8 moles of alkali oxide, and about 0.5 moles of SiO.sub.2 are present per mole of CaO which is in excess of the amount of CaO which can be bound in the form of calcium alkali phosphate.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile