scholarly journals STUDY OF SOME PARAMETERS TO OBTAIN THE P2O5 WATER- SOLUBLE FROM PARTIALLY ACIDULATED PHOSPHATE ROCKS (PAPRs) BY SULFURIC ACID

2012 ◽  
Vol 27 (0) ◽  
pp. 18-22 ◽  
Author(s):  
Abbes Mizane ◽  
Rabah Rehamnia
Keyword(s):  
Sulfuric Acid ◽  
Water Soluble ◽  
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%.

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

Phosphorus Uptake by Upland Rice From Superphosphate Fertilizers Produced With Sulfuric Acid Treatments of Brazilian Phosphate Rocks

2011 ◽  
Vol 42 (12) ◽  
pp. 1390-1403 ◽  
Author(s):  
José Lavres ◽  
André Rodrigues Reis ◽  
Thiago Assis Rodrigues Nogueira ◽  
Cleusa Pereira Cabral ◽  
Eurípedes Malavolta
Keyword(s):  
Sulfuric Acid ◽  
Upland Rice ◽  
Phosphorus Uptake ◽  
Phosphate Rocks ◽  
Acid Treatments

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

Phosphorus supplying capacity of phosphate rocks as influenced by compaction with water-soluble P fertilizers

2004 ◽  
Vol 68 (1) ◽  
pp. 73-84 ◽  
Author(s):  
Mamata Begum ◽  
G. Narayanasamy ◽  
D.R. Biswas
Keyword(s):  
Water Soluble ◽  
Phosphate Rocks ◽  
Water Soluble P ◽  
Soluble P ◽  
P Fertilizers

Total water-soluble sugars quantification in bio-oil using the phenol–sulfuric acid assay

2013 ◽  
Vol 104 ◽  
pp. 194-201 ◽  
Author(s):  
Marjorie R. Rover ◽  
Patrick A. Johnston ◽  
Buddhi P. Lamsal ◽  
Robert C. Brown
Keyword(s):  
Sulfuric Acid ◽  
Soluble Sugars ◽  
Water Soluble ◽  
Total Water ◽  
Bio Oil ◽  
Phenol Sulfuric Acid

Analysis of Water-Soluble Polysaccharides in an Edible Medicinal Plant Epimedium: Method Development, Validation, and Application

2014 ◽  
Vol 97 (3) ◽  
pp. 784-790 ◽  
Author(s):  
Hua-Feng Zhang ◽  
Li-Li Niu ◽  
Xiao-Hua Yang ◽  
Lu Li
Keyword(s):  
Sulfuric Acid ◽  
Method Development ◽  
Colorimetric Method ◽  
Water Soluble ◽  
Optimal Conditions ◽  
Sulfuric Acid Method ◽  
Chinese Markets ◽  
Concentrated Sulfuric Acid ◽  
Phenol Sulfuric Acid ◽  
Interday Precision

Abstract Water-soluble polysaccharides are important constituents with evident health benefits in Epimedium. The aim of this study was to establish a specific, accurate, reproducible, and sensitive phenol-sulfuric acid method for the quantitative assay of Epimedium polysaccharides and to determine polysaccharides in Epimedium samples from Chinese markets. Galactose was adopted as the standard monosaccharide, and 486 nm was chosen as the detection wavelength. The optimal conditions for the color reaction were obtained using single factor experiments and an orthogonal test: temperature, 20°C; amount of 5% phenol, 0.3 mL; amount of concentrated sulfuric acid, 3.5 mL; incubation time, 20 min; and addition sequence, phenol-sample-sulfuric acid. The colored sample solution after chromogenic reaction exhibited high stability within 2 h. The calibration curve was linear within the range 5.00–60.00 μg/mL, and the correlation coefficient of the regression equation was 0.999. LOD and LOQ were 1.65 and 5.00 μg/mL, respectively. Recovery, intraday precision, interday precision, and accuracy were 97.43 to 103.80%, 0.73 to 3.48%, 1.21 to 2.75%, and 97.74 to 101.62%, respectively. Polysaccharides in 26 samples of Epimedium collected from different provinces of China were quantified by the proposed colorimetric method, and a large variation of contents of polysaccharides was observed among these samples.

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
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