A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
INTEGRIERTES VERFAHREN ZUR HERSTELLUNG VON SCHWEFELSÄUREPROZESS-GEEIGNETER SCHWEFELDIOXIDQUALITÄT AUS KALZIUMSULFAT/PHOSPHOGIPS AUS DER PHOSPHORSÄUREPRODUKTION
A process for producing sulfuric acid and cement clinker may use calcium sulfate that is formed as a solid by-product and separated off in phosphoric acid production in a reaction of raw phosphate with sulfuric acid to form phosphoric acid. The process comprises treating calcium sulfate separated from the phosphoric acid with an acid to obtain a suspension comprising purified calcium sulfate, separating the purified calcium sulfate in solid form from the liquid phase of the suspension, mixing the purified calcium sulfate with admixtures and reducing agents to obtain a raw meal mixture for cement clinker production, burning the raw meal mixture to obtain the cement clinker, with formation of sulfur dioxide as offgas, and subjecting the sulfur dioxide formed to offgas purification and feeding the sulfur dioxide as raw material to sulfuric acid production to produce the sulfuric acid. The sulfuric acid produced may be used as starting material in phosphoric acid production.
INTEGRIERTES VERFAHREN ZUR HERSTELLUNG VON SCHWEFELSÄUREPROZESS-GEEIGNETER SCHWEFELDIOXIDQUALITÄT AUS KALZIUMSULFAT/PHOSPHOGIPS AUS DER PHOSPHORSÄUREPRODUKTION
A process for producing sulfuric acid and cement clinker may use calcium sulfate that is formed as a solid by-product and separated off in phosphoric acid production in a reaction of raw phosphate with sulfuric acid to form phosphoric acid. The process comprises treating calcium sulfate separated from the phosphoric acid with an acid to obtain a suspension comprising purified calcium sulfate, separating the purified calcium sulfate in solid form from the liquid phase of the suspension, mixing the purified calcium sulfate with admixtures and reducing agents to obtain a raw meal mixture for cement clinker production, burning the raw meal mixture to obtain the cement clinker, with formation of sulfur dioxide as offgas, and subjecting the sulfur dioxide formed to offgas purification and feeding the sulfur dioxide as raw material to sulfuric acid production to produce the sulfuric acid. The sulfuric acid produced may be used as starting material in phosphoric acid production.
INTEGRIERTES VERFAHREN ZUR HERSTELLUNG VON SCHWEFELSÄUREPROZESS-GEEIGNETER SCHWEFELDIOXIDQUALITÄT AUS KALZIUMSULFAT/PHOSPHOGIPS AUS DER PHOSPHORSÄUREPRODUKTION
INTEGRATED METHOD FOR PRODUCING SULPHUR DIOXIDE QUALITY SUITABLE FOR A SULPHURIC ACID PROCESS FROM CALCIUM SULPHATE/PHOSPHOGYPSUM FROM PHOSPHORIC ACID PRODUCTION
PROCÉDÉ INTÉGRÉ DE PRODUCTION D'UNE QUALITÉ DE DIOXYDE DE SOUFRE APPROPRIÉE POUR UN PROCÉDÉ D'ACIDE SULFURIQUE À PARTIR DE SULFATE DE CALCIUM/PHOSPHOGYPSE ISSU DE LA PRODUCTION D'ACIDE PHOSPHORIQUE
STOCKHOFF PETER (author) / GUETTA ZION (author)
2024-06-05
Patent
Electronic Resource
German
IPC:
C04B
Kalk
,
LIME
/
C01B
NON-METALLIC ELEMENTS
,
Nichtmetallische Elemente
/
C01F
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
,
Verbindungen der Metalle Beryllium, Magnesium, Aluminium, Calcium, Strontium, Barium, Radium, Thorium oder der Seltenen Erden
| European Patent Office | 2021
| European Patent Office | 2021
| European Patent Office | 2021
| European Patent Office | 2021
| European Patent Office | 2021