リン酸肥料製造（過リン酸石灰とDAP）

世界的な作物生産のために土壌リンを利用可能にする

Agriculture & Fertilizers Global Industrial Scale $25 billion

概要

Phosphate fertilizers are produced by treating phosphate rock (fluorapatite) with sulfuric acid to create single superphosphate (SSP), or with phosphoric acid to create triple superphosphate (TSP) and diammonium phosphate (DAP). Phosphorus is essential for plant energy transfer (ATP), root development, and seed formation. Global phosphate rock reserves are concentrated in Morocco (70%), and concerns about peak phosphorus supply have prompted efforts to improve phosphorus recycling from agricultural and wastewater sources.

化学プロセス

For SSP: finely ground phosphate rock is mixed with 70% sulfuric acid in a continuous mixer (den process). The mixture sets and cures for 3-6 weeks. For DAP: phosphate rock is digested with sulfuric acid to produce phosphoric acid (wet process), which is then neutralized with ammonia. The slurry is granulated, dried, and screened.

Ca5(PO4)3F + 5H2SO4 + 10H2O -> 3H3PO4 + 5CaSO4.2H2O + HF (wet process for phosphoric acid)
H3PO4 + 2NH3 -> (NH4)2HPO4 (DAP production)

原材料

  • Phosphate rock (Ca5(PO4)3F, fluorapatite) — Mining (Morocco, China, US, Russia) (Phosphorus source (30-37% P2O5))
  • Sulfuric acid (H2SO4) — Contact process from sulfur (Acid digestion agent)
  • Ammonia (NH3) — Haber-Bosch process (Nitrogen source for DAP/MAP)

最終製品

  • Single superphosphate (SSP) — Direct-application phosphorus fertilizer (16-20% P2O5, also provides sulfur and calcium)
  • Diammonium phosphate (DAP, (NH4)2HPO4) — High-analysis NP fertilizer (18% N, 46% P2O5)
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Environmental Impact

Phosphate mining disturbs large land areas and generates phosphogypsum waste (5 tons per ton of P2O5), which contains naturally occurring radioactive materials (NORM). Phosphorus runoff from overfertilized fields causes eutrophication of lakes and rivers. Fluoride and cadmium impurities in phosphate rock require management.

安全性の考慮事項

最新のイノベーション

Slow-release phosphorus fertilizers reduce runoff losses.
Phosphorus recovery from wastewater (struvite crystallization) creates a circular economy.
Biochar and mycorrhizal inoculants improve plant phosphorus uptake efficiency, reducing fertilizer requirements.

生産規模

50000000

トン/年

$25 billion

市場価値

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Frequently Asked Questions

What industry uses リン酸肥料製造（過リン酸石灰とDAP）?
リン酸肥料製造（過リン酸石灰とDAP） is used in the agriculture & fertilizers sector at global industrial scale scale.
What process is involved in リン酸肥料製造（過リン酸石灰とDAP）?
For SSP: finely ground phosphate rock is mixed with 70% sulfuric acid in a continuous mixer (den process). The mixture sets and cures for 3-6 weeks. For DAP: phosphate rock is digested with sulfuric acid to produce phosphoric acid (wet process), which is then neutralized with ammonia. The slurry is
What is the economic significance of リン酸肥料製造（過リン酸石灰とDAP）?
リン酸肥料製造（過リン酸石灰とDAP） has a market value of $25 billion and annual production of 50,000,000 tons.
What is the environmental impact of リン酸肥料製造（過リン酸石灰とDAP）?
Phosphate mining disturbs large land areas and generates phosphogypsum waste (5 tons per ton of P2O5), which contains naturally occurring radioactive materials (NORM). Phosphorus runoff from overfertilized fields causes eutrophication of lakes and rivers. Fluoride and cadmium impurities in phosphate
What raw materials are used in リン酸肥料製造（過リン酸石灰とDAP）?
The main raw materials include: Phosphate rock (Ca5(PO4)3F, fluorapatite), Sulfuric acid (H2SO4), Ammonia (NH3).