Topic
Potassium nitrate
About: Potassium nitrate is a research topic. Over the lifetime, 3537 publications have been published within this topic receiving 29450 citations. The topic is also known as: Nitric acid, potassium salt & Saltpeter.
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TL;DR: In this article, the vapor−liquid equilibria of aqueous solutions of lithium nitrate + potassium nitrate+ sodium nitrate in the mass ratio (53:28:19) and lithium nitric acid + potassium ionate + sodium nitrite in mass ratio(53:35:12) were obtained using a static method in the temperature range (333.15 to 473.15) K at 20 K intervals.
Abstract: Vapor−liquid equilibria of aqueous solutions of lithium nitrate + potassium nitrate + sodium nitrate in the mass ratio (53:28:19) and lithium nitrate + potassium nitrate + sodium nitrite in mass ratio (53:35:12) were obtained using a static method in the temperature range (333.15 to 473.15) K at 20 K intervals. Both mixtures were considered as binary working fluids (water/salts). The salt mass fraction was varied from 0.50 to 0.95. Barker’s method was used to calculate the liquid composition from the initial overall composition of the sample and the measured pressure and temperature. The vapor−liquid equilibrium data obtained were correlated using an analytical polynomial equation. The calculated and measured data showed good agreement. The vapor−liquid equilibrium data of both mixtures showed similar behavior, but the risk of crystallization is lower for the solution of lithium nitrate + potassium nitrate + sodium nitrite in mass ratio (53:35:12), which favors the operation of absorption refrigeration cy...
11 citations
TL;DR: In this paper, it was shown that metallic silver reacts to a much larger extent with a Lux-Flood acid (pyrosulphate) in solution than with nitrogen dioxide giving support to the nitryl cation as the acidic species in nitrate melts.
11 citations
TL;DR: In this paper, the dc conductivity, dielectric constant and loss value of two samples of KNO3 together with the frequency effect in a melt sample of kNO3 are reported.
Abstract: The dc conductivity, the dielectric constant and the dielectric loss at 100 kHz and 3?6 GHz, have been measured for samples of potassium nitrite and potassium nitrate over a wide range of temperature. The dc conductivity and the dielectric constant show anomalies at ?13?C and 40?C in a crystal of KNO2 pulled from the melt. However, the dielectric anomaly at 40?C does not indicate a ferroelectric-paraelectric phase transition and the room temperature phase of KNO2 seems not to be ferroelectric. The dc conductivity, the dielectric constant and loss measured in a randomly oriented single crystal, grown from aqueous solution, and a sample prepared from a melt of potassium nitrate, show anomalies at about 130?C on heating, and at about 124?C and 108?C on cooling. The dc conductivity, dielectric constant and loss value of the two samples of KNO3 together with the frequency effect in a melt sample of KNO3 are reported.
11 citations
Patent•
04 Sep 2013
TL;DR: In this article, the hydroponic nutrient solution of endive is prepared from macroelements, microelements and water, wherein the nutrient solution comprises the macro elements, such as carbon, hydrogen, oxygen, sulfur, nitrogen, phosphorus, potassium, calcium and magnesium, and the micro elements such as iron, boron, sodium, manganese, chlorine, zinc, copper and aluminum.
Abstract: The invention discloses hydroponic nutrient solution of endive. The hydroponic nutrient solution of endive is prepared from macroelements, microelements and water, wherein the nutrient solution comprises the macroelements, such as carbon, hydrogen, oxygen, sulfur, nitrogen, phosphorus, potassium, calcium and magnesium, and the microelements, such as iron, boron, sodium, manganese, chlorine, zinc, copper and aluminum. The main ingredients of the hydroponic nutrient solution of endive include calcium nitrate terahydrate, potassium nitrate, monoammonium phosphate, magnesium sulfate heptahydrate, heptahydrate, ammonium molybdate, ferrous sulfate, zinc sulfate, sodium silicate, magnesium sulfate, cobalt chloride, ferrous sulphate heptahydrate, ethylene diamine tetraacetic acid, boric acid, manganese sulfate tetrahydrate, blue copperas, calcium nitrate, manganese sulfate, potassium iodide, sodium chloride and sodium molybdate. The hydroponic nutrient solution of endive is high in absorption and utilization rate; and growth of the endive is accelerated. Thus, waste caused by nutrition excess or shortage due to the fact that the endive slowly grows and the hydroponic nutrient solution of the endive has no pertinence for a long period of time is radically solved.
11 citations
Patent•
25 Jun 2014
TL;DR: In this article, a multielement nitric acid nano-molten salt heat transfer and heat storage medium, a preparation method and application thereof, is characterized in that: it is formed by compounding of a multi-layer n-ric acid molten salt system and nanoparticles; the nanoparticles are nanoparticles of metal or non-metal oxides.
Abstract: The invention discloses a multielement nitric acid nano-molten salt heat transfer and heat storage medium, a preparation method and application thereof. The multielement nitric acid nano-molten salt heat transfer and heat storage medium provided by the invention is characterized in that: it is formed by compounding of a multielement nitric acid molten salt system and nanoparticles; the multielement nitric acid molten salt system is mainly composed of potassium nitrate, sodium nitrate, sodium nitrite and cesium nitrate; and the nanoparticles are nanoparticles of metal or non-metal oxides. The multielement nitric acid nano-molten salt heat transfer and heat storage medium prepared by the invention has the heat transfer performance of nitric acid molten salts, also enhances the safe working temperature upper limit to 600DEG C, has a wider use temperature range and good thermal stability. The molten salt heat transfer and heat storage medium prepared by the invention has good heat absorption and heat storage capacity, obviously enhanced coefficients of heat conductivity, as well as greatly increased thermal conductivity, thus being widely applicable in the technical field of solar thermal power generation.
11 citations