Phosphate rock analysis

Wagner s solution (phosphate rock analysis) dissolve 25 g citric acid and 1 g salicylic acid in water, and make up to 1 liter. Twenty-five to fifty milliliters of this reagent prevents precipitation of iron and aluminum. 

Wagner s solution (used in phosphate rock analysis to prevent precipitation of iron and aluminum). Dissolve 25 g of citric acid and 1 g of salicylic acid in water and dUute to 1 L. Use 50 mL of the reagent. 

Stowasser, W. F. 1991. Phosphate Rock - Analysis of the Phosphate Rock Situation in the United States 1990-2040, Engineering and Mining Journal, 192(9) 16CC-1611. 

Cost Fa.ctors, The dehvered costs of the phosphate rock and sulfuric acid raw materials often account for more than 90% of the cost of producing NSP, thus the production cost varies considerably with plant location. Because the rock is richer in P2O5 than is the low analysis NSP product, NSP need not be produced near the phosphate mine. However, deUvery of sulfuric acid and shipment of product to market are important cost factors. Most United States NSP plants have been located east of the Mississippi river, with concentration in the southeastern and extreme southern parts of the country where the largest use of the product has occurred. Production and use of the product also has been high in California. 

Phosphate-polymer control, in industrial water treatment, 26 132-133 Phosphate recognition, 16 794 Phosphate refractory dental dies, compressive strength, 8 289t Phosphate rock, 11 119, 120 minerals in, 19 5, 14 recovery of fluoride from, 14 12-13 U.S. imports for consumption of, 19 15t U.S. production of, 19 17 Phosphates, 18 814-863 19 19. See also Phosphate Polyphosphates aluminum acid, 18 839 ammonium, 11 487 18 835-836 analysis of, 18 851-852 calcium, 18 836-839 condensed, 18 841-852 crystalline, 18 839 dispersants, 8 710t economic aspects of, 18 859-860... 

Chromatogram of the Tenax-adsorption FPD-analysis of volatiles emitted during acidic decomposition of phosphate rock. 

Table 3 shows results of physical analysis in which our products had larger specific surface area than one of phosphate rock. It was recognized that they could be some supporting media for substantial substance such as hormone, pesticide and enzyme. 

Table 2 Results of chemical analysis of used phosphate rock...

This paper results from work completed in 1979 (and updated in 1980) to evaluate the emerging supply/demand, cost/price outlook for the fertilizer commodities phosphate rock, upgraded phosphates, sulfur, and sulfuric acid. Our purpose here is to publish, in part, our analysis of recent trends and events which impact on sulfur supply and demand, and to use these together with available production cost data to project price behavior for sulfur over the near term. Such projections are helpful to managers of large industrial firms as one of several tools available to them in making investment, contract, marketing, or other major decisions. This paper is necessarily limited in scope, and will attempt to summarize the world outlook with emphasis on the North American scene. 

Analysis necessary only for carbon dioxide from phosphate rock sources. b Analysis necessary only for carbon dioxide from coal gassification sources. 

Naturally occurring mineral products having sufficient phosphate content to be of commercial value are classified as phosphate rock. The grade or phosphate content of these products has been traditionally reported as percent Ca3(P04)2, which is referred to as bone phosphate of lime (BPL), tricalcium phosphate (TCP), or triphosphate of lime (TPL). Stoichiometric factors relating traditional rock analysis to other commonly used analytical... 

The Distribution of Phosphatic Rocks.—Great Britain.—The deposits are of historic interest only, in view of the abundant high-grade rock which is imported. The nodular deposits of the Eastern counties, known as eoprolites, contain the remains of the teeth and bones of fish and reptiles. The richer beds contain a satisfactory percentage of phosphate, as is evident from the following analysis — ... 

Shapiro, L., Brannock, W. W. Rapid analysis of silicate, carbonate and phosphate rocks. 

Phosphate rock and phosphoric acid Wet digestion separation by extraction with trioctylphosphine oxide destruction of complex prior to analysis Argon plasma emission spectrometry No data 98-100 Woodis et al. 1980 ... 

Zambia, Thailand and USA (Florida) were analyzed by using the X-ray fluorescence method for elemental composition. These rock phosphates have also been evaluated for their agronomic effectiveness by means of radioisotope techniques (Zapata and Axmann, 1991). The samples were prepared as pellets and analyzed using the emission transmission method for trace elements (Markowicz and Haselberger, 1992). All samples were excited using an Mo tube with an Mo secondary target. For quality control of concentration data analysis of standard reference material CRM 032 (phosphate rock) produced by CEC, Brussels, has been used. Satisfactory agreement between certified and measured values was obtained. 

Finely ground phosphate rock (Ca3(P04)2) is occasionally added to fertilizer formulations as a diluent or filler. However, because phosphate rock has only a very limited water solubility its action as a phosphate nutrient is small and very slow. Hence, this ingredient is not allowed to be included in the % P2O5 analysis appearing on fertilizer packaging. Before use as a filler, phosphate rock is normally defluorinated by heating with silica and steam to decrease the risk of soil contamination by fluoride (Chap. 10). 

A complete chemical and mineralogical analysis of a phosphate rock is helpful in evaluating its usefulness for making phosphoric acid. However, this information is not sufficient in itself trial runs in a plant or pilot plant are needed for a reliable evaluation unless the rock is one that has been used extensively in other similar plants with known results [10]. 

Table 11.14. Typical Analysis of Commercial Phosphate Rocks...

L. Yang, China s Phosphate Rock Industry Analysis Report 2009-2010, December 27, 2009. 

R.S. Young, Chemical analysis of phosphate rock. Topics Phos. Chem., 8, 454, 1976. 

According to an analysis, a sample of phosphate rock contains 74.6% Ca3(P04)2, by mass. How many grams of phosphoric acid, H3PO4, can be obtained from 30.0 g of the phosphate rock according to the following reaction ... 

This ReLIBS analyzer proved the feasibility of distant real time chemical analysis of phosphate rocks excavated by drag line machine in that it ... 

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