Amonização de superfosfato simples

Cobra Netto, A.

doi:10.1590/S0071-12761977000100036

Resumos

Superfosfato simples separado em peneiras 20-40-60-100 e mais de 100 "mesh" foi tratado com 3% em peso de amônia anidra para avaliar a reversão do fosfato em presença de "amônia livre".

Ordinary superphosphate run through 20 - 40 - 60 - 100 and plus mesh sieves were treated with 3 per cent (weight basis) of anhydrous ammonia in special aparattus. This amount reacting with normal superphosphate caused reversion in water soluble phosphate. The rate of ammoniation varied from 2,7 to 3,8% per unit of P2O5 considering the fraction before the treatment. The reversion range was from 44,6 to 57,9% of water soluble phosphate. The rate of correlation between solubility and ammonia dosis was -0,96 and the linear regression obtained was Y = 24,344-4,732x.

A. Cobra Netto

Professor, do Depto.° de Solos, Geologia e Fertilizantes, ESALQ

RESUMO

Superfosfato simples separado em peneiras 20-40-60-100 e mais de 100 "mesh" foi tratado com 3% em peso de amônia anidra para avaliar a reversão do fosfato em presença de "amônia livre".

SUMMARY

Ordinary superphosphate run through 20 - 40 - 60 - 100 and plus mesh sieves were treated with 3 per cent (weight basis) of anhydrous ammonia in special aparattus. This amount reacting with normal superphosphate caused reversion in water soluble phosphate.

The rate of ammoniation varied from 2,7 to 3,8% per unit of P₂O₅ considering the fraction before the treatment. The reversion range was from 44,6 to 57,9% of water soluble phosphate. The rate of correlation between solubility and ammonia dosis was -0,96 and the linear regression obtained was Y = 24,344-4,732x.

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LITERATURA CITADA

Entregue para publicação em: 28-12-1977.

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