This paper proposes a very attractive process for K 2 SO 4 production via the wet conversion of phosphogypsum PG and K 2 CO parallel study of the conversion of two synthetic types of gypsum by K 2 SO 4 was performed in order to compare their reactivity with that of We remark that PG is more reactive and yields the desired results while
China is ∼15% most of which enters the phosphogypsum during the wet process of phosphoric acid production The high silica content leads to an unstable quality when phosphogypsum is used in gypsum building During the decomposition and recovery of sulfur resources and cement from phosphogypsum a high silicon dioxide content
Ammonium sulfate is also used in preparation of other ammonium salts and food additive In biochemistry its precipitation is a common method for purifying proteins [17] So the present work aims to use the phosphogypsum waste for preparing both hydroxyapatite nano crystalline powder and ammonium sulfate at room temperature
Stoichiometrically for every tonne of ammonium sulphate produced tonnes of PCC is also produced and tonnes of gypsum and tonnes CO 2 are consumed South Africa has an opportunity to sequestrate up to % of its CO 2 emission and 100 % of its phosphogypsum generation through the Merseburg Chou et al are the latest to evaluate the
Phosphogypsum PG is the main by product of phosphoric acid which is produced by the sulfuric acid attack of phosphate rocks wet process This by product which contains around % phosphoric
DOI / Corpus ID 99459389; Ammonium sulfate preparation from phosphogypsum waste article{Kandil2017AmmoniumSP title={Ammonium sulfate preparation from phosphogypsum waste} author={Abdelhakim Kandil and Mohamed F Cheira and Hady Soliman Gado and Madiha H Soliman and Hesham M Akl} journal={Journal
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
FIELD chemistry SUBSTANCE invention refers to the technology of ammonium sulphate preparation from phosphogypsum and can be used in chemical industry at mineral fertilisers production The claimed method for ammonium sulphate preparation includes 1 phosphogypsum conversion in the reusable solution of ammonium sulphate with dispersed
The process of ammonia enhanced phosphogypsum mineral carbonation comprises three distinct sub processes It is consisted of mass transfer in gas liquid interface and solid liquid interface respectively and product layer diffusion Producing Ammonium Sulfate from Flue Gas Desulfurization By Products Energy Source 27 2005 pp
The result revealed that the system of ethanol and ammonia was optimal Meanwhile the process of potassium sulphate prepared from phosphogypsum in the system of ethanol and ammonia was also
Phosphogypsum PG is a by product of the wet process phosphoric acid H3PO4 production process which chemically consists of calcium sulfate dihydrate CaSO4•2H2O with some impurities
There are two known processes of producing ammonium sulphate a the direct reaction of ammonia ammonia solution or ammonia containing gas with sulphuric acid b the gypsum process where calcium sulphate is reacted with ammonium carbonate Robinson 1953 solution to form ammonium sulphate and the precipitated calcium carbonate PCC
Phosphogypsum PG is the main by product of phosphoric acid which is produced by the sulfuric acid attack of phosphate rocks wet process This by product which contains around % phosphoric acid is used as a low cost soil fertilizer PGF PGF consists mainly of gypsum CaSO4·2H2O P2O5 SiO2 and other impurities including a minor amount
Urease producing L sphaericus strain GUMP2 could be used to remove the hazardous phosphogypsum from the environment by converting it to the industrially useful CaCO 3 and ammonium sulfate a valuable agricultural fertilizer This novel and sustainable approach could be a promising solution for the hazardous phosphogypsum in the phosphoric acid
The process for manufacture of ammonium sulfate from gypsum known as the Merseburg Process named for the town in Germany where it was developed has been commercially produced in plants in Austria India Pakistan and the United Kingdom in the past It is based on reacting ammonia and carbon dioxide to produce ammonium carbonate which is then reacted
The technological process of recovering gypsum from phosphogypsum was obtained using a single flotation process test a scavenging test and a cleaning test To obtain the product index of the entire process the process shown in Figure 8 was adopted to perform the entire flowsheet test
Producing ammonium sulfate from flue gas desulfurization by products Energy Sources 27 11 2005 pp 1061 1071 Crossref View in Scopus Google Scholar Fractionation and fluxes of metals and radionuclides during the recycling process of phosphogypsum wastes applied to mineral CO 2 sequestration Waste Manag 45 2015 pp 412 419
In this study the technical feasibility of producing ammonium sulfate from FGD residues by allowing it to react with ammonium carbonate in an aqueous solution was preliminarily assessed Reaction temperatures of 60 70 and 80°C and residence times of 4 and 6 hours were tested to determine the optimal conversion condition and final product
Nano CaCO3 was prepared from phosphogypsum PG through reactive crystallization in the gas CO2 liquid NH3·H2O solid PG three phase system The effects of temperature CO2 flow rate and reaction time on the CaCO3 particle size distribution PSD were investigated The results show that PG derived nano CaCO3 with an average particle diameter
The obtained precipitate is the highly purified phosphogypsum which is used to obtain the highly purified ammonium sulfate fertilizer the preparation of ammonium sulfate process is applied using the suspended of 500 g purified phosphogypsum which is contained g calcium sulfate in 2 L of 3% ammonium sulfate solution as initiator 1/4
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