process. the application of phosphate coatings makes use of phosphoric acid and takes advantage of the low solubility of phosphates in medium or high ph solutions. iron, zinc or manganese phosphate salts are dissolved in a solution of phosphoric acid. when steel or iron parts are placed in the phosphoric acid, a classic acid and metal reaction takes place which locally depletes the hydronium .
mining and processing. common methods of extracting the iron ore consist of blasting, drilling, or general excavating, ,. most iron ore is produced from open-pit mines. after the iron ore is out of the ground, it may be shipped to the iron and steel manufacturing plant. if the ore contains less than 60 percent iron,.
the ojsc apatit enterprise, which is located on the kola peninsula, was the leading producer of apatite concentrate in russia and one of the world's leading suppliers of phosphate seven trust material; its core activities were the mining and beneficiation of apatite and nepheline-syenite ores at 10 deposits that have estimated combined reserves of 3.5 gt. the development plan for apatit to 2015 assumes an optimal level of apatite concentrate production of 8.5 mt/yr that would require levels of ore .
the mining industry of morocco is important to the national economy. morocco is the world's largest producer of phosphate, and contains about 75% of the world's estimated reserves. mining contributed up to 35% of exports and 5% of gdp in 2011. foreign investors have found the investment climate, the infrastructure, fiscal situation, and political stability very favorable to continue business in the country in this sector.
gel-like chromium iii phosphate is prepared through the reduction of ammonium dichromate, nh 4 2 cr 2 o 7, using ethanol, ch 3 cooh, and nitric acid, hno 3. this process is done in the presence of ammonium dihydrogen phosphate and urea at an elevated temperature where tetradecyltrimethylammonium bromide ttbr is used as structure directing .