K2SO4 production via the double decomposition reaction of KCl …
The production of potassium sulfate from phosphogypsum and potassium chloride in the presence of ammonia and isopropanol has been investigated. The solubility of …
Production of potassium sulfate from KCl and phosphogypsum …
K 2 SO 4 has been studied at 25 • C and 0.0 bar gauge using a 33 wt.% ammonia solution (with Fig. 7. Effect of ammonia solution to phosphogypsum ratio on the production of potassium sulfate at ...
CN1283588A
A process for preparing potassium sulfate and multiple by-products uses ardalite and potassium chloride as raw materials and the ammonia-contained solution catalyst, and features the transform reaction under stirring to obtain potassium sulfate. Regulating the ammonia concentation in mother liquid and taking other measures can prepare multiple by-products.
Continuous and simultaneous conversion of phosphogypsum …
The aim of this process is to produce potassium sulfate, a high-value fertilizer, from sulfate solutions obtained after dissolving Moroccan phosphogypsum in NaOH medium.
Experimental study on the mechanical properties of modified
In chemistry, preparing ammonium sulfate and potassium sulfate with phosphogypsum waste is now one of the feasible ways to obtain valuable raw materials 16,17. Yet, the actual benefits are ...
CN106587113A
Method by Producing Potassium Sulfate From Phosphogypsum disclosed in this invention, extracting sulfuric acid ammonium salt solution adopt solid ammonium bicarbonate for Raw material, ardealite is not necessary to process and just can directly use, and technological process is simple, and the purchasing of raw materials is convenient with storing, K 2 O …
Preparation of α-hemihydrate gypsum from phosphogypsum in …
In recent years, the atmospheric hydrothermal method has attracted extensive attention because of the mild reaction condition, high production efficiency and easy controlling of the reaction process [14].This method is basically in the laboratory stage or pilot scale test at present [15].The salt medium is the most critical factor for the efficient preparation of α-HH, …
Production of potassium sulphate by conversion of phosphogypsum …
This work shows the possibility of obtaining potassium sulfate by converting phosphogypsum and potassium carbotane by the reaction CaSO 4 + K 2 CO 3 → ↓ CaCO 3 + K 2 SO 4 . The optimal conditions for this process are determined. It is shown that in an aqueous medium at a temperature of 20 °C, a stoichiometric ratio of the initial ...
Effect of maleic acid and pH on the preparation of α-calcium …
Phosphogypsum (PG) is a by-product of the wet-process phosphoric acid process, which causes serious environmental issues. In this work, PG was taken as raw material to prepare α-calcium sulfate hemihydrate (α-CSH) at atmospheric pressure using Mg(NO 3) 2 solution, which is an environmentally friendly chlorine-free salt solution.
Recovery and recycling core of phosphogypsum: Characteristic …
Phosphogypsum(PG) is a solid waste produced by wet-process phosphoric acid.However, the heavy metals and other pollutants contained in PG have not been controlled in the process of resource utilization, and there are potential risks to the ecological environment and human health.In this paper, the basic physical and chemical properties (XRD, XRF, FTIR,TGA …
Sustainable process for the preparation of potassium sulfate by
The factors affecting the conversion of potassium chloride to potassium sulfate, such as aqueous ammonia to phosphogypsum ratio, weight percent of isopropanol in the solution, weight percent excess phosphogypsum, and reaction temperature and pressure have also been investigated.The optimum reaction conditions obtained at 25°C and atmospheric ...
K 2SO 4 production via the double decomposition …
The production of potassium sulfate from phosphogypsum and potassium chloride in the presence of ammonia and isopropanol has been investigated. The solubility of phosphogypsum in aqueous solutions of KCl, HCl, and mixtures of both has …
(PDF) Conversion of phosphogypsum to potassium sulfate: Part I.
The aim of this process is to produce potassium sulfate, a high-value fertilizer, from sulfate solutions obtained after dissolving Moroccan phosphogypsum in NaOH medium.
CN1041619C
The new process for producing potassium sulfate and ammonium chloride by phosphogypsum conversion method proposed by Chinese patent 1095055A is characterized by that it adopts phosphogypsum to refine so as to obtain wet-base refined gypsum, then fully mixes it with ammonium hydrogen carbonate, then adds ammonia material to make negative ...
Utilization of phosphogypsum in CO2 mineral sequestration by …
The sulphuric acid process is considered as economic; nevertheless, it manufacture large quantities of waste, illustrated by the global production of phosphogypsum approximately 100–280 Mt per year all over the world [28].During phosphoric acid production, a large amount of phosphogypsum produced which surpass the mass of the final product, about 5 tons of …
Production of potassium sulphate by conversion of …
This work shows the possibility of obtaining potassium sulfate by converting phosphogypsum and potassium carbotane by the reaction CaSO 4 + K 2 CO 3 → ↓ CaCO 3 + K 2 SO 4. The …
Continuous and simultaneous conversion of phosphogypsum
In this present work, the transformation of the Moroccan phosphogypsum (PG) waste, considered a potential source of sulfate, into potassium sulfate compound could help …
(PDF) Conversion of phosphogypsum to potassium sulfate and …
The aim of this process is to produce potassium sulfate, a high-value fertilizer, from sulfate solutions obtained after dissolving Moroccan phosphogypsum in NaOH medium. ... we combined the reaction of preparing K2 SO4 from the phosphogypsum and KCl and the reaction of preparing (NH4 )2 SO4 from the phosphogypsum, the carbon dioxide and the ...
Phosphogypsum Two-Step Ammonia-Carbonation …
during the conversion process of raw phosphogypsum to. CaCO 3 and (NH 4) 2 SO 4. For this purpose, the molar ratio . ... H.M.: Ammonium sulfate preparation from phosphogypsum . waste. J. Radiat. Res.
Single-stage process for manufacturing of potassium sulphate from
A single-stage process for the conversion of sodium sulphate (anhydrous or hydrated, of natural or anthropogenic origin) with potassium chloride in aqueous solution at 20-25 degrees C to potassium ...
Evaluation for the process of mineralization of CO2 using natural …
Download Citation | Evaluation for the process of mineralization of CO2 using natural K-feldspar and phosphogypsum to produce sulfate potassium | Mineralization of CO2 using thermal activated ...
Preparation of gypsum with high purity and whiteness from phosphogypsum
Phosphogypsum (PG) is a hazardous industrial solid waste product from the wet phosphate industry 1,2.The widespread deposition of that fine, light- to dark-grey, powder with a slight odor and ...
Production of Potassium Sulphate by Conversion of …
Abstract—The possibility of obtaining potassium sulfate by converting calcium sulfate (phosphogypsum) and potassium chloride in an ammonia solution was investigated. The …
CONVERSION OF PHOSPHOGYPSUM TO POTASSIUM …
Ammonium and potassium sulfate In the hemihydrate or dehydrate state, it is used aiming to recover the SO 4 content in manufacturing of ammonium or potassium sulfate by the double de-composition ...
DEVELOPMENT OF PROCESS TO MANUFACTURE …
phosphogypsum into calcium carbonate using an aqueous process and produce sodium sulfate. Sodium sulfate could then be used as a marketable product or be used as a feed material to produce some other products. One promising use of the sodium sulfate using cyclic sub processes ultimately yields elemental sulfur and hydrogen. If this approach is
Research of new process preparing potassium sulfate from …
To improve the process of potassium sulphate prepared from phosphogypsum (under study, no product, only method) in ammonia solution, the influence of solvent such as …
Comparative study of K2SO4 production by wet conversion from
This paper proposes a very attractive process for K 2 SO 4 production via the wet conversion of phosphogypsum (PG) and K 2 CO 3. A parallel study of the conversion of two …
Continuous and simultaneous conversion of Moroccan phosphogypsum …
Process of preparing potassium sulfate guided by phase diagram In this process, Moroccan phosphogypsum can be used as starting reactant to produce Na2SO4 and then K2SO4. Specifically, Na2SO4 is first produced from the conversion of phosphogypsum waste.
CN1107805A
The process for preparing potassium phosphate includes such technological steps as reaction of potassium chloride on cheaper calcium oxide, removing deposited calcium chloride to obtain potassium hydroxide solution, reaction with ardealite as waste dregs after producing ammonium phosphate to obtain potassium sulfate and calcium hydroxide, concentration, cooling …
Technology of Phosphogypsum One-step Preparation of …
The paper discusses process conditions of preparing potassium sulfate with phosphogypsum by one-step process.The best process factors are obtained by analyzing the single factor,which …