GB801027A - Fertilizers containing ammonium nitrate, dicalcium phosphate and calcium sulphite - Google Patents

Fertilizers containing ammonium nitrate, dicalcium phosphate and calcium sulphite

Info

Publication number
GB801027A
GB801027A GB3807/57A GB380757A GB801027A GB 801027 A GB801027 A GB 801027A GB 3807/57 A GB3807/57 A GB 3807/57A GB 380757 A GB380757 A GB 380757A GB 801027 A GB801027 A GB 801027A
Authority
GB
United Kingdom
Prior art keywords
ammonium
calcium
nitrate
sulphite
ammonium nitrate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3807/57A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stamicarbon BV
Original Assignee
Stamicarbon BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Stamicarbon BV filed Critical Stamicarbon BV
Publication of GB801027A publication Critical patent/GB801027A/en
Expired legal-status Critical Current

Links

Classifications

    • 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)

Landscapes

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

Abstract

In the production of a fertilizer by decomposing phosphate rock with nitric acid and precipitating calcium compounds by ammoniating the resulting solution, calcium nitrate is converted into ammonium nitrate by adding ammonia and in addition, sulphur dioxide, ammonium sulphite or ammonium bisulphite. The resulting fertilizer contains dicalcium phosphate, ammonium nitrate and calcium sulphite and the phosphate component is said to remain soluble in ammonium citrate when added to soil. In carrying out the process according to the invention, natural phosphate rock is subjected to nitric acid attack to produce a solution in which the molar ratio NO3/CaO is approximately 2. This solution is then ammoniated, preferably in a continuous process, to form a suspension of dicalcium phosphate and possibly calcium fluoride in a partly neutralized decomposition liquor in which the molar ratio NH3/NO3 is approximately 0,6. At this stage in the process some water may be evaporated and the weakly acidic mixture further neutralized with ammonia and either sulphur dioxide, ammonium sulphite or ammonium bisulphite whereupon the calcium nitrate is converted into ammonium nitrate. The product may then be granulated and dried. Prior to granulation potassium salts may be added to produce an N.P.K. fertilizer. Specifification 640,149 is referred to.
GB3807/57A 1956-02-08 1957-02-04 Fertilizers containing ammonium nitrate, dicalcium phosphate and calcium sulphite Expired GB801027A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL801027X 1956-02-08

Publications (1)

Publication Number Publication Date
GB801027A true GB801027A (en) 1958-09-03

Family

ID=19836400

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3807/57A Expired GB801027A (en) 1956-02-08 1957-02-04 Fertilizers containing ammonium nitrate, dicalcium phosphate and calcium sulphite

Country Status (1)

Country Link
GB (1) GB801027A (en)

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