DE394498C - Production of sodium nitrite - Google Patents

Production of sodium nitrite

Info

Publication number
DE394498C
DE394498C DEN21617D DEN0021617D DE394498C DE 394498 C DE394498 C DE 394498C DE N21617 D DEN21617 D DE N21617D DE N0021617 D DEN0021617 D DE N0021617D DE 394498 C DE394498 C DE 394498C
Authority
DE
Germany
Prior art keywords
production
sodium nitrite
gas
oxygen
nitrite
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DEN21617D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NITRUM AG
Original Assignee
NITRUM AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NITRUM AG filed Critical NITRUM AG
Application granted granted Critical
Publication of DE394498C publication Critical patent/DE394498C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B21/00—Nitrogen; Compounds thereof
    • C01B21/20—Nitrogen oxides; Oxyacids of nitrogen; Salts thereof
    • C01B21/50—Nitrous acid; Salts thereof

Description

Herstellung von Natriumnitrit. V urliegende Erfindung betrifft die Herstellung von Natriumnitxit aus Soda und nitrosen Gasen, welche bei der Oxydation von Ammoniak mit Sauerstoff erhalten werden. Bekanntlich wurde bisher - das Aminoniakgas mit einem Lberschuß von Sauerstoff bzw. Luft verbrannt. Nach diesem bekannten Verfahren erhält man verdünnte Stickoxydgase und muß die Absorption in großen Rieseltürinen mit wäßriger Sololösung v orgenoniinen werden, um Natriumnitrit zu erhalten. Hierbei wird praktisch eine Nitritlösung von höchstens ¢o Prozent Salzgehalt erhalten. Zur Gewinnung von festem N itritsalz inuß also pro Kilogramm Nitrit il/.. kg Wasser verdampft werden. Auch hat man bereits vorgeschlagen, das Gemisch von Ammoniak finit einem Überschuß von Sauerstoff bzw. Luft bei Temperaturen von etwa 6oo bis 750° zu verbrennen und das so gebildete Gas finit alkalischen Absorptionsmitteln zu neutralisieren. Es ist nur dann möglich, nach diesem Verfahren Nitrite zu erhalten, wenn die Absorption der erhaltenen nitrosen Gase so schnell erfolgt bzw. bei so hoher Temperatur, <laß die Oxydation des zunächst gebildeten NO zii N02 nicht quantitativ erfolgen kann.Production of sodium nitrite. The present invention relates to Production of sodium nitxite from soda and nitrous gases, which occurs during oxidation from ammonia with oxygen. As is well known, so far - the ammonia gas burned with an excess of oxygen or air. According to this known method one receives dilute nitrogen oxide gases and must be the absorption in large trickle doors pre-treated with aqueous solution to obtain sodium nitrite. Here a nitrite solution with a maximum salt content of ¢ o percent is obtained in practice. To the Extraction of solid nitrite salt per kilogram of nitrite il / .. kg of water be vaporized. It has also already been proposed that the mixture of ammonia be finite an excess of oxygen or air at temperatures of about 600 to 750 ° to burn and to neutralize the gas formed in this way finitely alkaline absorbents. It is only possible to obtain nitrites after this procedure if the absorption the nitrous gases obtained takes place so quickly or at such a high temperature, <let the oxidation of the initially formed NO zii N02 cannot take place quantitatively.

Es wurde nun gefunden, daß die N itritfabrikation in wesentlich einfacherer Weise erfolgen kann, wenn die Mengen Ainmoniakgas und Sauerstoff so bemessen werden, daß nach der Verbrennung reines N_ O.-Gas oder ein Gemenge von NO und N02 in gleichen Teilen entsteht. Dies geschieht, wenn die Gasmengen gemäß der Formel 2 NH3 -f- 3 O-- = N2 O.- -I- 3 Hz O bemessen werden, also das Ammoniakgas mit reinem Sauerstoff in dem Verhältnis 2 Volumenteile Ammoniak zu 3 Volumenteilen Sauerstoff verbrannt wird. Durch abschreckende Abkühlung nach der Verbrennung kann das Gas von dem bei der Verbrennung entstehenden Wasser befreit werden. Die Absorption dieses N203 Gases in fester kalzinierter Soda erfolgt überraschenderweise sehr schnell und quantitativ. Die entweichende Kohlensäure ist für andere Zwecke verwendbar. Man erhält sogleich ein festes Nitritsalz finit wenig Feuchtigkeit, die, wenn erforderlich, durch einfaches Trocknen entfernt werden kann.It has now been found that nitrite production can be carried out in a much simpler way This can be done if the quantities of ammonia gas and oxygen are measured in such a way that that after the combustion pure N_ O. gas or a mixture of NO and N02 in the same Sharing arises. This happens when the gas quantities according to the formula 2 NH3 -f- 3 O-- = N2 O.- -I- 3 Hz O, i.e. the ammonia gas with pure oxygen burned in the ratio of 2 parts by volume of ammonia to 3 parts by volume of oxygen will. The gas can be released from the with by cooling it off after combustion the water resulting from the combustion can be freed. The absorption of this N203 gas in solid calcined soda surprisingly takes place very quickly and quantitatively. The escaping carbon dioxide can be used for other purposes. One receives immediately a solid nitrite salt finitely little moisture, which, if necessary, by simple Drying can be removed.

Claims (1)

PATENT-ANSPRUCH: Verfahren zur Herstellung von Natriuinnitrit durch Verbrennen von "3#,ninioniak mit reinem Sauerstoff und nachheriger Absorption der erhaltenen Stickoxyde mittels Soda, dadurch gekennzeichnet, daß die Mengen Ammoniakgas und Sauerstoff so bemessen werden, daß nach der Verbrennung reines N, O"-Gas oder ein Gemenge von NO und N02 in gleichen Teilen entsteht. PATENT CLAIM: Process for the production of sodium nitrite by burning "3 #, ninionia" with pure oxygen and subsequent absorption of the nitrogen oxides obtained by means of soda, characterized in that the amounts of ammonia gas and oxygen are measured in such a way that pure N, O "Gas or a mixture of NO and N02 in equal parts.
DEN21617D 1922-11-17 1922-11-21 Production of sodium nitrite Expired DE394498C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH394498X 1922-11-17

Publications (1)

Publication Number Publication Date
DE394498C true DE394498C (en) 1924-04-24

Family

ID=4514035

Family Applications (1)

Application Number Title Priority Date Filing Date
DEN21617D Expired DE394498C (en) 1922-11-17 1922-11-21 Production of sodium nitrite

Country Status (2)

Country Link
CH (1) CH100477A (en)
DE (1) DE394498C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2367020A1 (en) * 1976-10-06 1978-05-05 Bayer Ag PROCESS FOR PREPARING SODIUM NITRITE FROM GAS CURRENTS CONTAINING NITROUS GASES

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2367020A1 (en) * 1976-10-06 1978-05-05 Bayer Ag PROCESS FOR PREPARING SODIUM NITRITE FROM GAS CURRENTS CONTAINING NITROUS GASES

Also Published As

Publication number Publication date
CH100477A (en) 1923-12-17

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