scholarly journals Studies on Nitrogen-Phosphorus Compounds . VIII. Formation of Ammonium Tetrametaphospate by the Reaction between Ammonia and the Hydrolysis Products of Phosphorus Pentoxide

1964 ◽  
Vol 85 (8) ◽  
pp. 481-484,A38
Author(s):  
Etsuro KOBAYASHI
Keyword(s):  
Phosphorus Pentoxide ◽  
Phosphorus Compounds ◽  
Hydrolysis Products ◽  
Nitrogen Phosphorus

Thermodynamic properties of phosphorus compounds. Part 1.—Entropy of phosphorus pentoxide

1963 ◽  
Vol 59 (0) ◽  
pp. 2702-2705 ◽  
Author(s):  
R. J. L. Andon ◽  
J. F. Counsell ◽  
H. McKerrell ◽  
J. F. Martin
Keyword(s):  
Thermodynamic Properties ◽  
Phosphorus Pentoxide ◽  
Phosphorus Compounds

scholarly journals PREPARATION OF PHOSPHORIC FERTILIZER BASED ON PHYTOCOMPOSITION OF ZINC AND MONOCALCIUM PHOSPHATE

2021 ◽  
Vol 73 (1) ◽  
pp. 43-51
Author(s):  
M. A. Zholmaganbetova ◽  
◽  
S. Usmanov ◽  
G. T. Omarova ◽  
B. S. Zakirov ◽  
...  
Keyword(s):  
Crop Production ◽  
Chemical Interaction ◽  
Phosphorus Pentoxide ◽  
Phosphorus Compounds ◽  
Utilization Rate ◽  
Agricultural Crops ◽  
Main Attention ◽  
Monocalcium Phosphate ◽  
Phosphorus Containing ◽  
Phosphorus Fertilizers

In this article the results of synthesis of monocalcium phosphate with a zinc phytocompound are considered. By studying the chemical interaction of monocalcium phosphate with a zinc phytocompound, studying their physicochemical and commercial properties, the optimal compositions of phosphorus fertilizers based on monocalcium phosphate with a zinc phytocompound have been determined. Considering the importance of phosphorus for the formation of plant tissue in increasing the productivity of agricultural crops, the main attention is paid to the assi-milation of phosphorus compounds by plants, which is of paramount importance. It is well known, that one of the main disadvantages of phosphorus fertilizers used in crop production is the low utilization rate of nutritive phosphorus pentoxide, which does not exceed 20-22%. The fact of the low utilization rate of nutritious phosphorus pentoxide in fertilizers is associated with its retrogradation in the soil with the formation of compounds not assimilated by plants. Agrochemical studies have established that phytocompounds increase the utilization rate of phosphorus-containing fertilizers.

Photochemical combustion of organic matter in sea water, for nitrogen, phosphorus and carbon determination

1968 ◽  
Vol 48 (1) ◽  
pp. 143-152 ◽  
Author(s):  
F. A. J. Armstrong ◽  
Susan Tibbitts
Keyword(s):  
Organic Matter ◽  
Sea Water ◽  
Phosphorus Compounds ◽  
Nitrogen Compounds ◽  
English Channel ◽  
First Order ◽  
First Order Kinetics ◽  
Channel Water ◽  
Carbon Determination ◽  
Nitrogen Phosphorus

A photochemical reactor, using a medium power mercury arc lamp for oxidation of organic matter in sea water, is described. The decomposition of some known compounds in distilled water and in sea water, using a 380 W lamp, was followed. First order kinetics with rate constants in the range 0·2–4·0 h−1 were observed. All the nitrogen compounds tested, including urea and some of its derivatives, were oxidized quantitatively. Breakdown of phosphorus compounds was rapid, but polyphosphate esters yielded polyphosphate ion which was only slowly hydrolysed to reactive orthophosphate. If polyphosphate is to be determined, hydrolysis by heating with acid should follow the irradiation. Some samples of English Channel water contained 0·02-0–05 fig-axom P/1. as organic polyphosphate.

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