Potassium Nitrate (PN) is of the basic need of chemical industry. With increase of demand in different production section of fertilizer, pharmaceutical, explosive, food industry etc, potassium nitrate the production becoming non economical to industry. The operating conditions and parameters are the main factors, which responsible for maximised the profits. The main aim of this study is to compared the production potassium nitrate in profitable as well as environmentally suitability way. From the literature different manufacturing process has been summarized for concluding this study.

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Environmentally and Economically Feasibility Manufacturing Process of Potassium Nitrate for Small Scale Industries: A Review

In order to recover in an environmentally sound and economic manner used hardening shop salts which contain nitrate-nitrite, the salts, comminuted to particle sizes of from 1 to 50 mm, are dissolved in a mixture of nitric acid and hydrogen peroxide without nitrogen oxides arising, and, by evaporation and cooling, potassium nitrate, sodium chloride, and sodium nitrate are obtained sequentially by fractional crystallization.

Process for the selective recovery of the salt constituents from used hardening shop salts which contain nitrite-nitrate

This invention discloses a method to prepare potassium nitrate and ammonium chloride by nitric acid, potassium chloride and ammonia. Wherein, with cycling magnesium hydroxide, mixing nitric acid, magnesium hydroxide, and potassium chloride to react; cooling, crystallizing, centrifugal separating, drying, and obtaining potassium nitrate; adding ammonia to the mother liquid of potassium nitrate to generate magnesium hydroxide deposition for cycling and ammonium chloride solution to obtain crystal. This technique is convenient to operation without pollution.

Method for making potassium nitrate using magnesium hydroxide circular reaction method

FIELD: chemistrySUBSTANCE: invention relates to production of mineral salts and fertilizers and can be used for production of potassium nitrate Method of producing potassium nitrate involves converting a solution of a mixture of sodium nitrate with potassium chloride, where sodium nitrate is added to the solution of the initial mixture while heating Obtained mixture is cooled for potassium nitrate crystallization and separated from recycled solution After separation of potassium nitrate potassium chloride or mixture of potassium and sodium chlorides is added to solution Solution is evaporated to form sodium chloride crystals and separated from the recycled solution Reverse solution having molar ratio of Cl:NOions, equal to (10–40):(60–90), respectively, is directed to prepare initial mixture Mass fraction of chloride-ion in the finished product – potassium nitrate crystals is 01–036 %EFFECT: method enables to obtain potassium nitrate with minimum content of chloride impurities1 cl, 1 dwg, 1 tbl, 3 ex

Shenkin Yakov S

Papers

Method of producing potassium nitrate