Produção de Fungicida de Sulfato de Cobre (Calda Bordalesa)

O fungicida de 140 anos que ainda protege as videiras

Agriculture & Fertilizers Global Industrial Scale $900 million

Visão geral

Copper sulfate is one of the oldest and most widely used fungicides in agriculture, first applied as Bordeaux mixture (copper sulfate + lime) in French vineyards in 1882 to control downy mildew (Plasmopara viticola). Copper ions disrupt fungal cell membrane integrity and inhibit spore germination. Copper-based fungicides remain essential in organic agriculture, where synthetic fungicides are prohibited. Annual agricultural use of copper compounds exceeds 300,000 tons (as CuSO4 equivalents), with viticulture, potato, and fruit production as primary applications.

Processo químico

Copper sulfate pentahydrate is produced by dissolving copper metal or copper oxide in dilute sulfuric acid (10-30%) with air oxidation at 50-80 degrees C. The saturated solution is crystallized by cooling to produce large blue triclinic crystals. For Bordeaux mixture, copper sulfate solution is mixed with slaked lime (Ca(OH)2) just before application to form the active copper hydroxide precipitate.

Cu + H2SO4 + 1/2O2 -> CuSO4 + H2O (dissolution with air oxidation)
CuSO4 + Ca(OH)2 -> Cu(OH)2 + CaSO4 (Bordeaux mixture formation)

Matérias-primas

  • Copper metal (Cu) or copper oxide (CuO) — Copper smelting or scrap recycling (Copper source)
  • Sulfuric acid (H2SO4) — Contact process (Dissolving acid)
  • Calcium hydroxide (Ca(OH)2) — Lime kiln (slaked lime) (Neutralizing agent for Bordeaux mixture)

Produtos finais

  • Copper sulfate pentahydrate (CuSO4.5H2O) — Fungicide, algicide, root killer, animal feed supplement (Blue crystals, 25% Cu content)
  • Bordeaux mixture (Cu(OH)2/CaSO4) — Foliar fungicide for grapes, potatoes, citrus (Alkaline copper hydroxide suspension)
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Environmental Impact

Repeated copper fungicide applications lead to copper accumulation in vineyard soils (100-1,500 mg Cu/kg vs. natural 20-30 mg/kg), which is toxic to soil organisms, particularly earthworms. The EU has restricted copper use to 4 kg/ha/year (averaged over 7 years) to limit accumulation. Copper runoff can impact aquatic ecosystems.

Considerações de segurança

Inovações recentes

Nano-copper formulations reduce the amount of copper needed per application by improving coverage and adhesion.
Copper-resistant rootstocks and biological control agents may reduce dependence on copper fungicides.
Fixed copper formulations (copper hydroxide, copper oxychloride) provide more consistent release.

Escala de produção

300000

toneladas/ano

$900 million

valor de mercado

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Frequently Asked Questions

What industry uses Produção de Fungicida de Sulfato de Cobre (Calda Bordalesa)?
Produção de Fungicida de Sulfato de Cobre (Calda Bordalesa) is used in the agriculture & fertilizers sector at global industrial scale scale.
What process is involved in Produção de Fungicida de Sulfato de Cobre (Calda Bordalesa)?
Copper sulfate pentahydrate is produced by dissolving copper metal or copper oxide in dilute sulfuric acid (10-30%) with air oxidation at 50-80 degrees C. The saturated solution is crystallized by cooling to produce large blue triclinic crystals. For Bordeaux mixture, copper sulfate solution is mixe
What is the economic significance of Produção de Fungicida de Sulfato de Cobre (Calda Bordalesa)?
Produção de Fungicida de Sulfato de Cobre (Calda Bordalesa) has a market value of $900 million and annual production of 300,000 tons.
What is the environmental impact of Produção de Fungicida de Sulfato de Cobre (Calda Bordalesa)?
Repeated copper fungicide applications lead to copper accumulation in vineyard soils (100-1,500 mg Cu/kg vs. natural 20-30 mg/kg), which is toxic to soil organisms, particularly earthworms. The EU has restricted copper use to 4 kg/ha/year (averaged over 7 years) to limit accumulation. Copper runoff
What raw materials are used in Produção de Fungicida de Sulfato de Cobre (Calda Bordalesa)?
The main raw materials include: Copper metal (Cu) or copper oxide (CuO), Sulfuric acid (H2SO4), Calcium hydroxide (Ca(OH)2).