UST105301I4 - Process for the production of solid urea-nitric phosphate fertilizer products - Google Patents

Process for the production of solid urea-nitric phosphate fertilizer products Download PDF

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Publication number
UST105301I4
UST105301I4 US06/612,162 US61216284A UST105301I4 US T105301 I4 UST105301 I4 US T105301I4 US 61216284 A US61216284 A US 61216284A US T105301 I4 UST105301 I4 US T105301I4
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United States
Prior art keywords
cao
products
ratio
urea
acidulation
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Pending
Application number
US06/612,162
Inventor
Jack M. Sullivan
Yong K. Kim
Kjell R. Waerstad
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Tennessee Valley Authority (ATV)
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Individual
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Publication date
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Priority to US06/612,162 priority Critical patent/UST105301I4/en
Assigned to TENNESSEE VALLEY AUTHORITY reassignment TENNESSEE VALLEY AUTHORITY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: KIM, YONG K., SULLIVAN, JACK M., WAERSTAD, KJELL R.
Priority to US06/665,844 priority patent/US4507139A/en
Application granted granted Critical
Publication of UST105301I4 publication Critical patent/UST105301I4/en
Pending legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05C—NITROGENOUS FERTILISERS
    • C05C9/00—Fertilisers containing urea or urea compounds
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05B—PHOSPHATIC FERTILISERS
    • C05B11/00—Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes
    • C05B11/04—Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes using mineral acid
    • C05B11/06—Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes using mineral acid using nitric acid (nitrophosphates)
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S206/00—Special receptacle or package
    • Y10S206/807—Tamper proof

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Fertilizers (AREA)

Abstract

The present invention relates to the reaction of phosphate rock with nitric acid and urea to produce nitrogen-phosphorus containing slurries, which slurries may be granulated and dried to produce solid N-P fertilizer products with agronomically advantageous low pHs (1.1-4.0). Products with optimum physical and chemical properties were discovered by investigating the characteristics of each individual material as a function of the nitric acid acidulation ratio (mole ratio HNO3 :CaO) and the mole ratio urea:CaO present in each product. Acidulation ratios ranged from 1.2 to 2.1 while ratios urea:CaO ranged from 1.6 to 4.0. Selected products with optimum physicochemical properties are tabulated below:
______________________________________
Acidulation Ratio Ratio Melting HNO3 :CaO, M/M Urea:CaO, M/M Grade Pt, °C. ______________________________________ 1.2 2.2 23.8--11.7--0 137-139 1.4 2.4 25.0--11.0--0 136 1.6 2.8 25.9--9.9--0 133-137 1.8 3.0 26.4--9.2--0 134-135 2.0 3.3 27.2--8.7--0 130 2.1 3.2 36.6--8.8--0 125-130 ______________________________________ Acidulation P2 O5 Solubility, Critical Rela- Ratio % pH of 1% tive Humidity HNO3 :CaO, M/M Water Citrate solution at 25° C., % ______________________________________ 1.2 69.2 82.1 2.5 59.3 1.4 81.8 90.0 2.4 60.9 1.6 88.9 91.9 2.3 60.1 1.8 96.7 98.9 2.1 59.9 2.1 99.0 100 2.1 60.0 2.1 100 100 2.1 59.5 ______________________________________
The products have excellent storage characteristics. The improved properties of these products result partially from the formation of a new compound, Ca(H2 PO4)(NO3).CO(NH2)2, which was discovered during the course of the investigation that led to the instant invention.
US06/612,162 1984-05-21 1984-05-21 Process for the production of solid urea-nitric phosphate fertilizer products Pending UST105301I4 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US06/612,162 UST105301I4 (en) 1984-05-21 1984-05-21 Process for the production of solid urea-nitric phosphate fertilizer products
US06/665,844 US4507139A (en) 1984-05-21 1984-10-26 Acid type solid urea-nitric fertilizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/612,162 UST105301I4 (en) 1984-05-21 1984-05-21 Process for the production of solid urea-nitric phosphate fertilizer products

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US06/665,844 Continuation-In-Part US4507139A (en) 1984-05-21 1984-10-26 Acid type solid urea-nitric fertilizer

Publications (1)

Publication Number Publication Date
UST105301I4 true UST105301I4 (en) 1985-04-02

Family

ID=24451991

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/612,162 Pending UST105301I4 (en) 1984-05-21 1984-05-21 Process for the production of solid urea-nitric phosphate fertilizer products

Country Status (1)

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US (1) UST105301I4 (en)

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