Experimental Study on the Effect of Polyol Admixtures on the Interfacial Tension of Potassium Dihydrogen Phosphate in Aqueous Solutions: Induction Time Experiments Versus Drop Shape Analysis

2009 ◽  
Vol 48 (5) ◽  
pp. 2659-2670 ◽  
Author(s):  
Stephan Machefer ◽  
Klaus Schnitzlein
Keyword(s):  
Experimental Study ◽  
Interfacial Tension ◽  
Aqueous Solutions ◽  
Shape Analysis ◽  
Induction Time ◽  
Potassium Dihydrogen Phosphate ◽  
Dihydrogen Phosphate ◽  
Potassium Dihydrogen ◽  
Drop Shape

scholarly journals KH2PO4 crystallisation from potassium chloride and ammonium dihydrogen phosphate

2016 ◽  
Vol 18 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Kristina Jančaitienė ◽  
Rasa Šlinkšienė
Keyword(s):  
Aqueous Solutions ◽  
Potassium Chloride ◽  
Solid Phase ◽  
Potassium Dihydrogen Phosphate ◽  
Molar Ratio ◽  
Dihydrogen Phosphate ◽  
Ammonium Dihydrogen Phosphate ◽  
Potassium Dihydrogen ◽  
Increasing Temperature ◽  
Nitrogen Phosphorus

Abstract Seeking to obtain bulk (NPK – nitrogen, phosphorus, potassium), chlorine-free fertilizers, the influence of interaction between potassium chloride and ammonium dihydrogen phosphate in aqueous solutions at temperature of 20, 40, 60 and 80°C has been investigated. Components of the solid phase have been identified by methods of chemical and instrumental analysis: radiography (X – ray), infra – red molecular absorption spectroscopy (IR) and scanning electron microscopy (SEM). It has been observed that the largest amount of solid state potassium dihydrogen phosphate was obtained at 60–80°C, when the potassium chloride and ammonium dihydrogen phosphate molar ratio is equal 0.8:0.2. Changing the molar ratio of 0.5:0.5 to 0.8:0.2, and with increasing temperature, various shaped crystals have developed in the remaining aqueous solutions with a morphology shifting from sharp needles to tetragonal prism.

Experimental Study on Additives for the Reduction of Alkalinity for Ecological Concrete

2014 ◽  
Vol 672-674 ◽  
pp. 1885-1889
Author(s):  
Yan Zhuang ◽  
Meng Wang ◽  
Li Kun Zheng
Keyword(s):  
Experimental Study ◽  
Ferrous Sulfate ◽  
Ordinary Portland Cement ◽  
Ph Value ◽  
Potassium Dihydrogen Phosphate ◽  
High Strength ◽  
Ammonium Bicarbonate ◽  
Dihydrogen Phosphate ◽  
Potassium Dihydrogen ◽  
High Alkalinity

Concrete has been one of the most widely used materials in Engineering, which also induced the problems of vegetation destruction, soil erosion, and even deterioration for ecosystems. The ecological concrete was proposed to reinforce the slope due to its characteristics of high strength and large porosity to ensure the growth of plants. However the high alkalinity for ordinary portland cement constrained the growth of plants. An experimental test including 15 groups of samples was carried out to evaluate the effects of materials including polycarboxylate superplasticizer, calcium carbonate, ammonium bicarbonate, potassium dihydrogen phosphate, silica fume, ferrous sulfate and calcium lignosulfonate on pH value for ecological concrete. Under the condition that the compressive strength and porosity meet the requirement of ecological concrete, two sets of additives were proposed, which are suitable for the slope with high strength and the slope with low alkalinity requirements respectively.

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