PL10397B3

PL10397B3 - Method and device for the continuous production of aqueous ammonium salt solutions.

Info

Publication number: PL10397B3
Application number: PL10397A
Authority: PL
Filing date: 1928-06-27
Publication date: 1929-05-31

Description

Najdluzszy czas trwania patentu do 14 stycznia 1942 r.Wynalazek niniejszy ma na celu wy¬ twarzanie wodnego rozczynu azotanu amo¬ nowego metoda ciagla w ten sposób, aby powstajacy rozezyn byl stale alkaliczny i mial jak najnizsza temperature.Od obydwu tych czynników zalezy trwalosc aparatury wykonanej z glinu, Kwasne i gorace rozczyny azotanu amono¬ wego powoduja szybka korozje glinu i do¬ prowadzaja w krótkim czasie do zniszcze¬ nia aparatury. Poza tern reakcji w wyzszej temperaturze towarzyszy zawsze wydzie¬ lanie sie mgiel azotanu amonowego, które daja sie z trudnoscia stezyc.W niniejszym sposobie caly proces zo¬ bojetniania rozdziela sie na dwa etapy, przyczem w pierwszym etapie wysyca sie gazowym amon jakiem, doplywajacym rura g wode zawierajaca (powstajacy ciagle) rozpuszczony azotan amonowy (w aparacie a), poczem otrzymana wode amonjakalna o odpowiedniem stezeniu chlodzi sie w chlodnicy 6, odbierajac jej cieplo reakcji amonjaku gazowego z woda.W drugim etapie przeprowadza sie wla¬ sciwe zobojetnianie przez doprowadzenie tej schlodzonej wody amonjakalnej i chlod¬ nego kwasu azotowego oddzielnemi prze¬ wodami (na kwas e, na amonjak b) do u- rzadzenia c, pozwalajacego na szybkie wy-mieszanie i usuwanie roztworu zobojetnio¬ nego, ktpry nastepnie schladza sie w chlód- nicy a.Wlasciwym aparatem do zobojetniania jest pompa odsrodkowa c umieszczona po¬ miedzy chlodnicami, przez jedna z których 6 doprowadza sie schlodzony roztwór a- monjakalny, przez druga d odprowadza sie przez przelew h roztwór azotanu amono¬ wego, przyczem oddzielnym przewodem e doprowadza sie kwas azotowy.Przy procesie zobojetniania dobiera sie celowo taki stosunek kwasu azotowego do amonjaku, azeby (przez stosowanie malego nadmiaru amonjaku) otrzymany roztwór azotanu amonowego byl stale slabo alka¬ liczny. Roztwór powstaly ze zobojetniania pozostaje w obiegu kolowym, a tylko czesc plynu usuwa sie z urzadzenia do dalszej przeróbki. Pozostala czesc sluzy jako me¬ dium do pobierania amoniaku i kwasu, roz¬ cienczajac soba te dwa ciala i lagodzac tern samem reakcje. PLThe longest term of the patent is until January 14, 1942. The present invention aims to produce an aqueous solution of ammonium nitrate by a continuous method in such a way that the resulting solution is always alkaline and has the lowest possible temperature. Both of these factors depend on the durability of the equipment produced. from aluminum, the acidic and hot solutions of ammonium nitrate cause rapid corrosion of aluminum and lead to equipment destruction in a short time. Apart from the reaction stage, at higher temperatures there is always the formation of ammonium nitrate mists, which are difficult to concentrate. In the present method, the entire zorification process is divided into two stages, with the first stage saturating with ammonium gas flowing in the pipe g. the water containing (continuously formed) dissolved ammonium nitrate (in apparatus a), then the obtained ammoniacal water of the appropriate concentration is cooled in the cooler 6, taking away its heat of the gas ammonia reaction with the water. of ammoniacal water and cold nitric acid through separate lines (for acid e, for ammonia like b) to device c, allowing for rapid mixing and removal of the neutralized solution, which is then cooled in a cooler a. The proper apparatus for neutralization is a centrifugal pump placed between the coolers, through one of which 6 the cooled solution is fed. Ammonium nitrate solution, through the second d the ammonium nitrate solution is removed through the overflow h, and nitric acid is supplied through a separate line e. the ammonium nitrate solution was still slightly alkaline. The solution resulting from the neutralization remains in the circular circulation, and only a part of the liquid is removed from the device for further processing. The remainder serves as a medium for the uptake of ammonia and acid, diluting the two bodies with each other and moderating the same reaction. PL

Claims

Patent claims. 1. Method and device for the continuous preparation of aqueous solutions of ammonium salts, characterized by the fact that the entire process of neutralizing nitric acid is divided into two stages; in the first stage, the water is saturated with ammonium nitrate with ammonia gas, and the resulting solution is then the appropriate concentration is cooled, and then, in the second stage, the proper neutralization is carried out by supplying chilled ammonia water and cool nitric acid through separate lines to a device that allows for quick mixing and removal of the solution desiccated, which is then cooled down gradually.

2. The method according to claim The method according to claim 1, characterized by the fact that the ratio of nitric acid to ammonia is deliberately chosen such that the ammonium nitrate solution obtained is still slightly alkaline in view of a small excess of ammonia.

3. The method according to p. 1 and 2, characterized by the fact that the solution formed from the neutralization remains in the circular circulation, and only a part of the liquid is removed from the device for further processing.

4. The method according to p. 1, 2 and 3, the significant point that the proper apparatus for neutralization is a centrifugal pump, located between two coolers, through one of which the cooled ammonium nitrate solution is fed, through the other the finished ammonium nitrate solution is discharged through a separate nitric acid is supplied through the line.

5. The method according to p. 1, 2, 3 and 4, the significant point is that the free ends of the coolers are led to a common vessel where the solution is saturated with a gas monoxide and the ammonium nitrate solution is withdrawn. Panstwowa Fabryka Zwiazków Azotowych in Tarnów. To the patent description No. 10397. ** v T * «\ ^ k ^ lr Print by L. Boguslawski, Warsaw. PL