Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Production of ammonium potassium polyphosphates
T996001 Production of ammonium potassium polyphosphates
Patent Drawings:Drawing: T996001-2    Drawing: T996001-3    
« 1 »

(2 images)

Inventor: Sheridan, et al.
Date Issued: July 1, 1980
Application: 06/076,007
Filed: September 17, 1979
Inventors: Frederick; Leland L. (Florence, AL)
McCullough; John F. (Florence, AL)
Sheridan; Richard C. (Sheffield, AL)
Assignee: Tennessee Valley Authority (Washington, DC)
Primary Examiner:
Assistant Examiner:
Attorney Or Agent:
U.S. Class: 423/306; 71/36; 71/51; 71/64.1
Field Of Search:
International Class:
U.S Patent Documents:
Foreign Patent Documents:
Other References:









Abstract: Embodiment No. 1. Urea phosphate prepared from wet-process phosphoric acid is heated with monopotassium orthophosphate in a mole ratio of 0.25 to 4.0 at 130.degree. to 200.degree. C. to form an ammonium potassium polyphosphate having an average chain length between 1.2 and 2.5. The ammonium potassium polyphosphate is dissolved in aqueous ammonia to yield concentrated fertilizer solutions containing the three major nutrients and over 50 percent total plant food.Embodiment No. 2. Phosphoric acid containing 54 to 76 percent P.sub.2 O.sub.5 is heated with urea (urea:H.sub.3 PO.sub.4 mole ratio 0.5 to 2.0) and monopotassium orthophosphate (urea:KH.sub.2 PO.sub.4 mole ratio 0.25 to 4.0) at 130.degree. to 200.degree. C. to form an ammonium potassium polyphosphate having an average chain length between 1.2 and 2.5. The ammonium potassium polyphosphate is dissolved in aqueous ammonia to yield concentrated fertilizer solutions containing the three major nutrients and over 50 percent total plant food.
Claim:
Description:
 
 
  Recently Added Patents
Profile-based user access to a network management system
Nonvolatile semiconductor storage device and a manufacturing method thereof
System and method of automatic piloting for in-flight refuelling of aircraft, and aircraft comprising said system
Amide derivatives, process for preparation thereof and use thereof as insecticide
Method of making a low-Rdson vertical power MOSFET device
Recording device, recording method, and program
Method for manufacturing non-volatile memory device, non-volatile memory element, and non-volatile memory device
  Randomly Featured Patents
Modular switching network for telecommunication system
Key code filter apparatus and method
Inserting systems and methods
Monosilane or disilane derivatives and method for low temperature deposition of silicon-containing films using the same
Coal-based organic growth compound
Toner control device
Flow control closure
Process for the preparation of polyester resin
Temperature compensating circuit for varactor diodes
Method and biosensor for analysis