DE1912898C - Process for the manufacture of a fertilizer consisting of ammonium sodium nitrate - Google Patents

Description

and introduced into the cycle. 45 this is blown through the boiling solution. The

This process therefore does not allow any secondary gas mixture to be introduced into the reactor

products-free procedural conduct and does not lead and mixed with the levies,

for the formation of ammonium sodium nitrate. In contrast to the well-known

In British patent specification 25111 a th single method is the present, coupled Process for the production of ammonium nitrate is a series of coordinated prescriptions, which drive steps to avoid fog formation.

in the neutralization of ammonia in ammonium, for example, by the choice of the concentrated nitrate solutions is carried out as a circulation procedure. tration of the starting solution caused by action With the help of this method, too, the process of changing nitric acid to sodium chloride solution is simultaneous Production of chlorine, sodium bicarbonate will keep 55, in the subsequent carbonizienat and ammonium sodium nitrate not possible. an optimal yield of sodium

In the "Journal for Inorganic Chemistry", bicarbonate guaranteed.

Vol. 85, 1914, p. 247 ff., By Fiedetiew and below, the method is based on the

Article published by K oil tu no ff deals with drawing and an example explained in more detail

the chemical-physical fundamentals of Car- 60 The figure represents the individual basic operations

boning of ammonia-saturated sodium of the process.

nitrate solutions. Also of this publication are the first operation of the coupled procedure No instructions can be found which form the production of ammonia with the help of an equivalent early production of the above-mentioned products he known processes, such as. B. the methane con-ability would have. 65 tation 1. Ammonia is used as a raw material The invention is a process for the production of nitric acid by oxidation 2 or Position one made of ammonium sodium nitrate - also for neutralization 7 and saturation of the night Fertilizer that uses chlorine and reaction solution at the same time. That in the production

3 '4

Carbon dioxide produced by ammonia becomes

Carbonization 8 uses that according to the Reini example

The solid sodium chloride obtained in 3 is subjected to oxidation 4 by means of nitric acid. As a result of 12.8 mol of NaCl by means of 70% nitric oxide, a gas mixture is obtained which oxidizes acid, using so much acid, mainly chlorine, nitrogen oxides and nitrosyl, that the resulting solution contains the following concentrations of chloride. From this gas mixture the exhibited
_Chlorine compound by oxidation to gaseous NaNO ... ₅ 7 _j88 o / _o

ChIo / and absorption eliminated with nitric acid. S ^ f ³ 10 72%

From this gas mixture di Sä d

pure eliminated. ^ f 10 72%

From this gas mixture the acid and io un 3140%

Water vapors removed by cooling. The liquid- ^

This solution was diluted with water, then

mainly hold sodium nitrate, not to be neutralized with gaseous ammonia and such

nitric acid and a certain length of time _{saturated with NH 3} that the ammonia-containing

Amount of chlorides that had the following concentration when nitrogen brine was blown in:

substance oxides are removed from the solution. The in- _NaNO 12 8 mol

follow the oxidation of the chlorine ion and the nitrosyl- NW Nf) 3 2 MoI

Chloride resulting gaseous products, the NH 10 * 8 mol

Containing chlorine and nitrogen oxides become _H ^ 1000 V

Rectification 5 passed, from where the chlorine as ao ² ^

End product is derived. The nitrogen oxides are This solution was created by means of gaseous carbon ends absorbed at 6 and the resulting nitric oxide carbonized. The process yield, acidic for the oxidation of sodium chloride and nitro- gen to the utilization of the sodium ion sylchlorids is used. 75%. After carbonization, 9.6 moles were obtained

The post-reaction solution is re-95 NaHCO ₃ as a precipitate and a solution of the following with ammonia

neutralized and saturated (7). The sodium composition thus obtained:

and ammonium nitrate solution is by means of the NaNO 3 2 mol

Ammonia synthesis 1 and the calcination stage 10 stam- NH NO 12 * 8 moles

menden carbon dioxide carbonized (8). That during ΝΗΗΓΟ 1 * 2 moles

the carbonization 8 resulting sodium hydrogen 30 HO ' 805 6 g

carbonate is removed from the solution by filtering 9- ²

separated and then by calcining 10 to By heating this solution, the Am-.

Processed sodium carbonate. decomposed monium hydrogen carbonate. By deriving

The sodium carbonate forms the end product, _{whereas that of NH 3} , CO ₂ and H ₂ O vapors in equivalent carbon dioxide is fed back for carbonization in 8 amounts, a solution of the following is obtained. The filter solution is passed to the composition: carbonization 11, where the remainder of carbon dioxide NaNO 3 2 mol

and ammonia is driven off. These gases consumed _{NH NO} 128 mol

one uses for neutralization and absorption 7, _H A ^s gOs'ö _e

the decarbonised solution, on the other hand, becomes the in- 40 ²

thickening 12 and then the crystallization 13 for the purpose of evaporation of the water from this

Separation of the ammonia sodium nitrate, which as a solution is a mixed ammonium sodium nitrate with

End product obtained is fed. obtained a content of 79.46% ammonium nitrate.

1 sheet of drawings

Claims (1)

Soda obtained with waste-free process management. Patent claim: to _be Method of making one from Am- This task ™ * ^you f? ™ J ^ f "* ^lo . ^St ! sodium nitrate existing fertilizer, which is characterized in that one m ι before at Trium nitrate containing solutions after saturation introduces dioxide, the precipitated NaHCO for further introduces carbon dioxide with ammonia, the precipitated i. Processing on soda filters and out, the NaHCO ₃ for further processing on the mother liquor remaining on soda the ammonium sodium nitrate filtered and recovered from the remaining mother liquor by thickening. the ammonium sodium nitrate by thickening. The procedure here is that the extracts sodium nitrate solution and nitric acid nut I ₅ moniak neutralizes and saturates and then carbonized with carbon dioxide. The resulting na- Trium hydrogen carbonate is then known The invention relates to a method for the preparation of sodium carbonate processed in the position of a solution consisting of ammonium sodium nitrate and remaining ammonium nitrate the fertilizer, which as a technically coupled Vcr-20 was not converted into sodium nitrate driving is carried out, in which also chlorine by evaporation, crystallization, centrifugation and sodium carbonate is obtained. and drying the obtained nitre separated. In the USA.-Patent 3 210 153 a ver The neutralization of nitric acid and the saturation drive for the production of chlorine and sodium nitrate supply of the sodium nitrate solution by means of ammonia by oxidation of sodium chloride by means of SaI- * 5 as well as the subsequent carbonization of the obtained pitric acid. The end products of this oxytene solution by means of carbon dioxide are dation process are chlorine and sodium nitrate that leads to the obtained ammonium sodium nitrate receive. not less than 70% ammonium nitrate at one The German patent specification 271 518 contains a total nitrogen content of more than 30%. Process for the production of ammonium nitrate 30 The saturation and neutralization and then by converting sodium nitrate by means of Am- ßend for carbonization is determined solution monium bicarbonate known in aqueous solution, when by oxidation of the sodium chloride by means of salt the ammonium nitrate as the main and sodium pitric acid. The resulting reaction bicarbonate can be obtained as a by-product. The products contain nitrogen oxides, nitrosyl chloride after the secretion of sodium bicarbonate, chlorine and carbonate were added. The nitrosyl chloride is obtained from the Remaining mother liquor is carried out in a known manner by means of concentrated nitric acid Subjected to decarbonization, furthermore to 5 ° C oxidation and absorption eliminated. The gases are cooled, 40% of the ammonium formed being dried by cooling. From the received Nitrate crystallize out, and the gas mixture in the lye is transformed into nitrogen oxides and chlorine permanent ammonium nitrate separated in an amount of 60% 40 rectification. The oxides of nitrogen will be processed together with the unreacted sodium nitrate in a known way to nitric acid. The introduced into circulation. Those with ammonium nitrate in the oxidation process of sodium chloride by means of saturated solution, which also sodium nitrate ent- nitric acid did not react chlorine then ammonium bicarbonate is added and the nitrogen oxides are eliminated by