PL16019B3 - Method of absorbing nitrogen oxides. Matte patent for Mtett No. 10117. - Google Patents

Method of absorbing nitrogen oxides. Matte patent for Mtett No. 10117. Download PDF

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Publication number
PL16019B3
PL16019B3 PL16019A PL1601930A PL16019B3 PL 16019 B3 PL16019 B3 PL 16019B3 PL 16019 A PL16019 A PL 16019A PL 1601930 A PL1601930 A PL 1601930A PL 16019 B3 PL16019 B3 PL 16019B3
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PL
Poland
Prior art keywords
nitrogen oxides
oxygen
gases
mtett
matte
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Application number
PL16019A
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Polish (pl)
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Publication of PL16019B3 publication Critical patent/PL16019B3/en

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Najdluzszy czas trwania patentu do 20 kwietnia 1944 r- Wedlug patentu glównego Nr 10317 mozliwie dokladnie utlenione gazy, zawie¬ rajace tlenki azotu, stopniowo stykaja sie scisle z coraz bardziej stezonym kwasem azotowym, a wreszcie z najbardziej stezo¬ nym w temperaturze ponizej 0°C, przyczem w pierwszem stadjum pochlaniania stosuje sie kwas azotowy o stezeniu, wystarczaj a- cem co najmniej do osiagniecia stanu rów¬ nowagi z zawierajacemi tlenki azotu gaza¬ mi, przeznaczonemu do pochlaniania. Spo¬ sób powyzszy przy uzyciu nadzwyczajnie malych przestrzeni chlonnych daje odloci- ny praktycznie wolne od tlenków azotu i kwasu azotowego i dlatego dajace sie za¬ wrócic ponownie do obiegu kolowego.Obecnie wykryto, ze sposób ten mozna wy¬ konac znacznie korzystniej, przeprowadza¬ jac bogate w tlen produkty spalania, wy¬ tworzone podczas spalania amonjaku w czystym tlenie, w mozliwie dokladnie utle¬ nione gazy, zawierajace tlenki azotu, i wprowadzajac dopiero te gazy w scisle ze¬ tkniecie z coraz bardzej stezanym, a wresz¬ cie z najbardziej stezonym kwasem azoto¬ wym, przyczem odlociny uwolnione calko¬ wicie lub prawie calkowicie od tlenków azo¬ tu i kwasu azotowego mozna wprowadzac¦zpowrotem do obiegu, zastepujac jednocze¬ snie tlen zuzyty swiezym. Sposób niniejszy w j&orównarfiti ze sposbem wedlug patentu glównego wykazuje nastepujace zalety. 1) Kwas stosowany wedlug patentu Nr 10317 w pierwszem stadjuni procesu ma w niniejszym przypadku znacznie wyzsze ste¬ zenie, niz przy uzyciu gazów utleniania, o- trzymywanych podczas utleniania amon ja¬ ku w powietrzu. 2) Wode, tworzaca sie podczas utlenia¬ nia amonjaku, trzeba usuwac tylko czescio¬ wo, poniewaz woda pozostala w gazie two¬ rzy stale z #204 i 02 wysokoprocentowy kwas azotowy. 3) Nastepujacego po poprzednio uzy¬ tym kwasie, nieco mocniejszego, majacego na celu utlenienie ostatnich sladów N203, wzglednie NO, na N02 i H20, przyczem sam kwas redukuje sie czesciowo na N02, nie trzeba stale odnawiac, poniewaz sila u- tleniajaca mieszaniny gazowej bogatej w tlen wystarcza do stalego regenerowania tego kwasu. 4) Dzieki duzej szybkosci utleniania nizszych tlenków azotu w czystym tlenie, mozna pracowac w znacznie wyzszych tem¬ peraturach, skutkiem czego zbyteczne jest specjalne chlodzenie solanka, stosowane dotychczas zwykle w pierwszej czesci urza¬ dzenia, w której odbywa sie prawie calko¬ wite utlenienie. 5) Sposób niniejszy daje sie latwo do¬ stosowywac do wszelkich warunków pracy z rozmaitemi produktami, poniewaz warun¬ ki pracy latwo mozna zmieniac (np. w zwiazku z temperatura i zawartoscia wody w gazie), i w rezultacie pozwala otrzymy¬ wac mocny kwas azotowy, wiecej N204 lub bardziej rozcienczony kwas azotowy, przy¬ czem stosuje sie zawsze bardzo male pomie¬ szczenia chlonne i utleniajace, których po¬ jemnosc wynoii zaledwie 1/20 czesc pomie¬ szczen, stosowanych dotychczas. PLThe longest term of the patent until April 20, 1944 - According to the main patent No. 10317, possibly highly oxidized gases, containing nitrogen oxides, gradually come into contact with more and more concentrated nitric acid, and finally with the most concentrated one at a temperature below 0 ° C however, in the first stage of absorption, nitric acid is used in a concentration that is at least sufficient to bring it into equilibrium with the gases to be absorbed containing nitrogen oxides. The above method, using extremely small absorbent spaces, gives the distances practically free of nitrogen oxides and nitric acid and therefore recyclable. It has now been found that this method can be carried out much more advantageously by Oxygen-rich combustion products, formed during the combustion of ammonia in pure oxygen, with as thoroughly oxidized gases as possible, containing nitrogen oxides, and only introducing these gases into a tight contact with the more and more concentrated, and finally with the most concentrated nitric acid, and the waste products freed completely or almost completely from nitrogen oxides and nitric acid can be recycled, replacing the used oxygen with fresh oxygen. The present process is equivalent to that of the main patent and has the following advantages. 1) The acid used according to patent No. 10317 in the first stage of the process in the present case has a much higher concentration than when using the oxidation gases obtained during the oxidation of ammonium in air. 2) The water formed during the oxidation of ammonia only needs to be removed partially, because the remaining water in the gas constantly forms with # 204 and 02 high-percentage nitric acid. 3) Following the previously used acid, a little stronger, aimed at oxidizing the last traces of N2O3, or NO, to NO2 and H2O, because the acid itself is partially reduced to NO2, it is not necessary to constantly renew it, because the oxidizing power of the gas mixture is sufficient for the constant regeneration of this acid. 4) Due to the high oxidation rate of the lower oxides of nitrogen in pure oxygen, it is possible to operate at much higher temperatures, making the special brine cooling unnecessary, which has hitherto been usually used in the first part of the device in which almost complete oxidation takes place. 5) The present process is easily adaptable to any working conditions with a variety of products, since the working conditions can be easily changed (e.g. in relation to the temperature and water content of the gas) and as a result produces strong nitric acid. more N 2 O 4 or more dilute nitric acid, whereby very small absorption and oxidizing rooms are always used, the capacity of which is only 1/20 of the rooms previously used. PL

Claims (1)

1. Zastrz e z enie patentowe. Sposób pochlaniania tlenków azotu we¬ dlug patentu Nr 10317 z zastosowaniem po¬ wrotnego odprowadzania odlocin, uwolnio¬ nych od tlenku azotu i kwasu azotowego, do urzadzen spalajacych amonjak przy jed- noczernem uzupelnianiu zuzytego tlenu, znamienny tern, ze stosuje sie bogate w tlen gazy, otrzymane w znany sposób, zapomo- ca spalania amonjaku w tlenie lub w gazach bogatych w tlen, i zawierajace mozliwie wysoko utlenione tlenki azotu. Lonza Elektrizitatswerke und Chemische Fabriken Aktiengesellschaft. Zastepca: Inz. dypl. M. Zoch, rzecznik patentowy. Druk L. B«gusliwskl«f* i Skl, Warsiaws. PL1. Patent reservation. Method for absorbing nitrogen oxides according to the patent No. 10317 using the recirculation of waste dust, freed from nitrogen oxide and nitric acid, to an ammonia-burning device, such as with a one-black replacement of oxygen consumed, characterized by the use of gases rich in oxygen , obtained in a known manner by combustion of ammonia in oxygen or oxygen-rich gases and containing possibly highly oxidized nitrogen oxides. Lonza Elektrizitatswerke und Chemische Fabriken Aktiengesellschaft. Deputy: Inz. dipl. M. Zoch, patent attorney. Printed by L. B "gusliwskl" f * i Skl, Warsiaws. PL
PL16019A 1930-09-08 Method of absorbing nitrogen oxides. Matte patent for Mtett No. 10117. PL16019B3 (en)

Publications (1)

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PL16019B3 true PL16019B3 (en) 1932-04-30

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