Monophosphorsäure

Guichon fertigt Sonderarmaturen zur Herstellung von Monophosphorsäure

Ablassventile, Absperrventile, Keilplattenschieber, Kugelhähne, Absperrklappen, Rückschlagklappen Schaugläser & Siebfilter

FAQ
Rückschlagklappe
Typ : 902

DN 15 bis 600 PN 10 bis 420

Edelstähle, Duplexstähle, Nickellegierungen, Sonderstähle

Rückschlagklappe 
Typ : 902
Schauglas
Typ : 803

DN 15 bis 200 PN 10 bis 40
– Anschluss feste oder geschraubte Flansche
Edelstähle oder Sonderlegierungen
Schauglas 
Typ : 803

Herstellung

  • Materialen C-Stahl (CS), Edelstahl (SS), Duplex & Super Duplex, Titan (Ti), Zirkonium (Zr), Uranus® B6, Tantal (Ta), Nickel (Ni), Hastelloy®, Monel
  • Konstruktion Schweisstechnik, Gusstechnik, Aus dem Vollen (Monoblock)

Verwendung

  • Betriebsbedingungen Hochdruck, Hochtemperatur, Tieftemperatur, Abrasion, Korrosion, Hochviskosität, Vakuum, Langlebigkeit, Geräuscharmut, Totraumfreiheit
  • Medien Flüssigkeiten, Flüssigkeiten mit festen Bestandteilen, Gas, Pulver und pulverartige Medien, Viskose und hochviskose Medien

FAQ - Monophosphorsäure

Monophosphorsäure – Anwendungen von Monophosphorsäure :

– Manufacture of fertilizers
– Surface treatment of metals
– E338 – acidity regulator / antioxidant / sequestering agent in the food industry
– Cleaning of surfaces (metal, tile, porcelain, …)
– Water treatment, petrochemical catalyst
– Coagulating the latex rubber
– Dyeing in textile industry
– Dental cement …

Posted in: FAQ - Monophosphorsäure

Monophosphorsäure – Herstellungsprozess von Monophosphorsäure :

Phosphoric acid (H3PO4) can be produced by 3 main commercial methods: wet process, thermal process and dry kiln process. Wet process is by far the most common route and the acid can be used in phosphate fertilizers production (DAP, MAP, SPA). Thermal process phosphoric acid is of a much higher purity and is used in the manufacture of high grade chemicals, pharmaceuticals, detergents, food products, and other nonfertilizer products. The last method, using a rotary kiln, is a promising alternative because of its reduced environmental footprint and potential cost saving.

The concentration of phosphoric acid is normally expressed as % P2O5 (percent phosphoricanhydride) rather than % H3PO4 (percent phosphoric acid).
In a wet process facility (see figure 1), phosphoric acid is produced by reacting sulfuric acid (H2SO4) with naturally occurring phosphate rock. The reaction also forms calcium sulfate (CaSO4), commonly referred to as gypsum. The insoluble gypsum is separated from the reaction solution by filtration.

The operating conditions are generally selected so that the calcium sulfate will be precipitated in either the dihydrate or the hemihydrate form, thus producing 26-32% P2O5 at 70-80°C for dihydrate precipitation and 40-52% P2O5 at 90-110°C for hemihydrate precipitation. Further evaporation of the solvent can be performed for a high-concentration phosphoric acid.

Example of phosphoric acid process

Figure 1. Schematic flow diagram of a wet process plant (phosphoric acid process)

Posted in: FAQ - Monophosphorsäure

Monophosphorsäure – Empfohlene Ventile :

Industrial phosphoric acid solutions are very aggressive due to impurities coming from natural phosphate rocks. Pumps and valves must be made of corrosion resistant alloys such as super-austenitic stainless steel (AISI 904L or Uranus B6, Hastelloy, Incoloy, Inconel) or high chromium content.

Posted in: FAQ - Monophosphorsäure