Partially acidulated phosphate rocks made from phosphoric acid using direct acidulation-granulation techniques

1987 ◽  
Vol 12 (1) ◽  
pp. 85-98 ◽  
Author(s):  
A. C. Braithwaite ◽  
D. A. Rogers
Keyword(s):  
Phosphoric Acid ◽  
Phosphate Rocks ◽  
Partially Acidulated Phosphate Rocks

scholarly journals Obtaining the partially acidulated phosphate rocks by means of intermediate-grade phosphate and diluted phosphoric acid: Influence of some parameters

2016 ◽  
Vol 18 (3) ◽  
pp. 39-43
Author(s):  
Abbes Mizane ◽  
Ahmed Boumerah ◽  
Noureddine Dadda ◽  
Rabah Rehamnia ◽  
Salah Belhait
Keyword(s):  
Phosphoric Acid ◽  
Reaction Times ◽  
Water Soluble ◽  
Particle Sizes ◽  
Phosphate Rocks ◽  
Partially Acidulated Phosphate Rocks ◽  
Water Soluble P ◽  
Conversion Rates ◽  
Soluble P ◽  
Phosphoric Acid Concentration

Abstract In this work, some parameters during the partial acidulation by phosphoric acid of phosphate 53.75% BPL (bone phosphate of lime) having different particle sizes are determined. P2O5 recovery is obtained by performing a series of reactions using phosphoric acid diluted from 10 to 40 wt.% and with reaction times ranging from 10 to 50 minutes. The best conversion rates are obtained with the following reaction parameters: phosphates size: 88-177 μm, reaction time: 50 minutes and phosphoric acid concentration: 40 wt.%. In the second part, the water-soluble P2O5 of PAPRs (Partially Acidulated Phosphate Rocks) obtained with phosphoric acid 30% and 40 wt.% is measured. The results of experiments showed that the water-soluble P2O5 has reached 15.2% for PAPRs obtained by reacting phosphate 88 μm with phosphoric acid 40 wt%.

PRE-AMMONIATION OF PHOSPHORIC ACID BY THE PHOSPHO-NITRIC PROCESS FOR PHOSPHATE ROCKS

1968 ◽  
pp. 111-119
Author(s):  
F. BARZOCCHINI ◽  
R. MONALDI
Keyword(s):  
Phosphoric Acid ◽  
Phosphate Rocks

Use of partially acidulated phosphate rocks as phosphate fertilizers

1993 ◽  
Vol 35 (1-2) ◽  
pp. 47-59 ◽  
Author(s):  
S. S. S. Rajan ◽  
B. C. Marwaha
Keyword(s):  
Phosphate Rocks ◽  
Phosphate Fertilizers ◽  
Partially Acidulated Phosphate Rocks

Partially acidulated phosphate rocks: Phosphorus release characteristics

1990 ◽  
Vol 22 (2) ◽  
pp. 109-117 ◽  
Author(s):  
J. Hagin ◽  
S. S. S. Rajan ◽  
M. K. Boyes ◽  
M. Upsdell
Keyword(s):  
Phosphorus Release ◽  
Phosphate Rocks ◽  
Partially Acidulated Phosphate Rocks

scholarly journals Evaluation of Saudi Phosphate Rocks for Wet Process Phosphoric Acid Production

1992 ◽  
Vol 4 (1) ◽  
pp. 33-44 ◽  
Author(s):  
T.F. Al-Fariss ◽  
H.O. Ozbelge ◽  
F.A. Abdel Aleem ◽  
S.M. Abdulrazik
Keyword(s):  
Phosphoric Acid ◽  
Acid Production ◽  
Phosphate Rocks ◽  
Wet Process

Comparison of Bray I and Pi tests for evaluating plant-available phosphorus from soils treated with different partially acidulated phosphate rocks

1989 ◽  
Vol 114 (2) ◽  
pp. 211-216 ◽  
Author(s):  
R. G. Menon ◽  
S. H. Chien ◽  
L. L. Hammond
Keyword(s):  
Available Phosphorus ◽  
Phosphate Rocks ◽  
Partially Acidulated Phosphate Rocks

Phosphate rocks and partially-acidulated phosphate rocks as controlled release P fertilizers

1993 ◽  
Vol 35 (1-2) ◽  
pp. 25-31 ◽  
Author(s):  
J. Hagin ◽  
R. Harrison
Keyword(s):  
Controlled Release ◽  
Phosphate Rocks ◽  
Partially Acidulated Phosphate Rocks ◽  
P Fertilizers

scholarly journals Determination of the concentration of Ce, La, Sm and Eu in a phosphogypsum stack, in Imbituba city, Santa Catarina, Brazil

2018 ◽  
Vol 43 (3) ◽  
pp. 37 ◽  
Author(s):  
Renata Coura Borges ◽  
Letícia Mombrini Marques ◽  
Cláudio Fernando Mahler ◽  
Alfredo Victor Bellido Bernedo
Keyword(s):  
Rare Earth ◽  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Phosphoric Acid ◽  
Rare Earth Elements ◽  
Phosphate Fertilizer ◽  
Phosphate Rocks ◽  
Santa Catarina

Phosphate fertilizer industry produces phosphoric acid from phosphate rocks, and as a byproduct, it produces phosphogypsum, also known as agricultural gypsum. This material was stock an open-air stacks near the producing units. In order to determine levels of rare-earth elements in phosphogypsum stacks, located in Imbituba, Brazil. Samples of 1000 grams of phosphogypsum were collected in nine different points in stack 1. The concentration of rare-earth elements was determined through neutron activation analysis and results indicate significant values of rare earth elements in the phosphogypsum from Imbituba, when compared to the values of the Earth’s crust.

Partially acidulated phosphate rocks: Controlled release phosphorus fertilizers for more sustainable agriculture

1994 ◽  
Vol 37 (1) ◽  
pp. 69-78 ◽  
Author(s):  
S. S. S. Rajan ◽  
M. B. O'Connor ◽  
A. G. Sinclair
Keyword(s):  
Controlled Release ◽  
Sustainable Agriculture ◽  
Phosphate Rocks ◽  
Partially Acidulated Phosphate Rocks ◽  
Phosphorus Fertilizers
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