CS243945B1 - Method of ammonia trapping from relief gases - Google Patents
Method of ammonia trapping from relief gases Download PDFInfo
- Publication number
- CS243945B1 CS243945B1 CS845632A CS563284A CS243945B1 CS 243945 B1 CS243945 B1 CS 243945B1 CS 845632 A CS845632 A CS 845632A CS 563284 A CS563284 A CS 563284A CS 243945 B1 CS243945 B1 CS 243945B1
- Authority
- CS
- Czechoslovakia
- Prior art keywords
- ammonia
- acids
- phenoxyacetic
- methyl
- absorption
- Prior art date
Links
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000007789 gas Substances 0.000 title claims description 11
- LCPDWSOZIOUXRV-UHFFFAOYSA-N phenoxyacetic acid Chemical compound OC(=O)COC1=CC=CC=C1 LCPDWSOZIOUXRV-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000010521 absorption reaction Methods 0.000 claims abstract description 17
- 239000007864 aqueous solution Substances 0.000 claims abstract description 4
- WHKUVVPPKQRRBV-UHFFFAOYSA-N Trasan Chemical class CC1=CC(Cl)=CC=C1OCC(O)=O WHKUVVPPKQRRBV-UHFFFAOYSA-N 0.000 claims description 6
- 239000005574 MCPA Substances 0.000 claims description 5
- QJVXBRUGKLCUMY-UHFFFAOYSA-N 2-(2-methylphenoxy)acetic acid Chemical class CC1=CC=CC=C1OCC(O)=O QJVXBRUGKLCUMY-UHFFFAOYSA-N 0.000 claims description 2
- 239000007900 aqueous suspension Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000000243 solution Substances 0.000 abstract description 9
- 239000002253 acid Substances 0.000 abstract description 5
- PMPOPSWETLDYSC-UHFFFAOYSA-N azanium;2-(4-chloro-2-methylphenoxy)acetate Chemical compound [NH4+].CC1=CC(Cl)=CC=C1OCC([O-])=O PMPOPSWETLDYSC-UHFFFAOYSA-N 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000002250 absorbent Substances 0.000 abstract description 4
- 230000002745 absorbent Effects 0.000 abstract description 4
- 150000003863 ammonium salts Chemical class 0.000 abstract description 4
- 150000007513 acids Chemical class 0.000 abstract description 2
- 239000004009 herbicide Substances 0.000 abstract description 2
- -1 2-methyl-4-chlorophenoxy Chemical group 0.000 abstract 3
- 238000007872 degassing Methods 0.000 abstract 1
- 239000012895 dilution Substances 0.000 abstract 1
- 238000010790 dilution Methods 0.000 abstract 1
- FKGFBYXUGQXYKX-UHFFFAOYSA-N phenyl ethaneperoxoate Chemical class CC(=O)OOC1=CC=CC=C1 FKGFBYXUGQXYKX-UHFFFAOYSA-N 0.000 abstract 1
- KDSJJOJLYXCFRV-UHFFFAOYSA-N azane;2-phenoxyacetic acid Chemical compound [NH4+].[O-]C(=O)COC1=CC=CC=C1 KDSJJOJLYXCFRV-UHFFFAOYSA-N 0.000 description 5
- 239000006227 byproduct Substances 0.000 description 3
- 239000003517 fume Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003337 fertilizer Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- SEGKFMXJNIEDQN-UHFFFAOYSA-N 2-(2,4-dichloro-6-methylphenoxy)acetic acid Chemical compound CC1=CC(Cl)=CC(Cl)=C1OCC(O)=O SEGKFMXJNIEDQN-UHFFFAOYSA-N 0.000 description 1
- WHLKFTSLSDHFMU-UHFFFAOYSA-N 2-(2-chloro-6-methylphenoxy)acetic acid Chemical compound CC1=CC=CC(Cl)=C1OCC(O)=O WHLKFTSLSDHFMU-UHFFFAOYSA-N 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 239000001166 ammonium sulphate Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- YNKVVRHAQCDJQM-UHFFFAOYSA-P diazanium dinitrate Chemical group [NH4+].[NH4+].[O-][N+]([O-])=O.[O-][N+]([O-])=O YNKVVRHAQCDJQM-UHFFFAOYSA-P 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000002363 herbicidal effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Vynález sa týká chemie. Rieši sposob zachytávania amoniaku z odplyno-v, pričom sa amoniak absorbuje v suspenzii, alebo vo vodnom roztoku fenoxyoctových kyselin. Amoniak s fenoxyoctovými kyselinami zreaguje za vzniku amónnej soli íenioixyoctových kyselin. Fenoxyoctové kyseliny obsahujú 50 až 100 % hmot. 2-metyl-4-chlórfenoxyoctovej kyseliny. Výhodné je možno proces uskutečnit nepřetržíte na absorpčnej kolóne. Získaný absorpčný roztok sa použije na riedemie amonných solí fenoxyoctových kyselin (Dikotex 40). Vynález nájde uplatnenie predovšetkým pri výrobě amonných solí fenoxyoctových kyselin, ktoré sa používajú ako herbicidy v piolnohospodárstve.The invention relates to chemistry. It solves the method of capturing ammonia from degassing, whereby ammonia is absorbed in or a phenoxyacetic acid aqueous solution acids. Ammonia with phenoxyacetic acids is reacted to form the ammonium salt of phenoxy acetates acids. Phenoxyacetic acids contain 50 to 100 wt. 2-methyl-4-chlorophenoxy acid. It is preferred the process to carry out does not persist on the absorption column. The absorbent solution obtained is used for the dilution of phenoxyacetic ammonium salts acids (Dikotex 40). The invention finds application in particular in the production of phenoxyacetic ammonium salts acids used as herbicides in agriculture.
Description
Vynález rieši sposob zachytávania amoniaku z plynov, ktoré o^pa^ajúý pri výrobě produktov, kde sa používá ako'surovina''amoniak.SUMMARY OF THE INVENTION The present invention provides a method for trapping ammonia from gases which are used in the manufacture of products using ammonia as a raw material.
Prii výrobě, alebo spracovaní amoniaku často· vznikajú odplyny, ktoré obsahujú amoniak a z hladiska hospodárnosti i životného prostredia ich nemožno vypúšťať do ovzdušia. Pri vyšších koncentráciách sa amoniak z plynov· absorbuje za vzniku čpavkovej vody o různej koncentrácii čpavku. Zo zriedených plynov sa najčastejšie amoniak absorbuje, pričom často sa využívá následná chemická reakcia amoniaku s absorbentom. Ako příklad je možné uviesť zachytáváme odplynov z výroby koksu, kde sa odplyny zachytávajú v kyselině sírovej, pričom ako vedlajší produkt vzniká síran amonný, ktorý sa používá ako hnojivo v pornohospoidárstve. Ňiekedy sa plynný amoniak zachytává v roztokoch dusičnanov za vzniku amoniakátov. Ako příklad je možné uviesť amoniakát dusičnanu amonného, ktorý sa používá na výrobu kombinovaných hnojív. Vo vyššie uvedených prípadoch využitia amoniaku z odplynov vznikajú pováčšinou vedtajšie produkty, pričom často sú ťažkosti s ich odbytom.The production or processing of ammonia often results in fumes containing ammonia and cannot be discharged into the atmosphere from an economic and environmental point of view. At higher concentrations, ammonia is absorbed from the gases to produce ammonia water of varying concentrations of ammonia. Of the diluted gases, ammonia is most commonly absorbed, often using the subsequent chemical reaction of ammonia with the absorbent. By way of example, we capture fumes from coke production, where fumes are collected in sulfuric acid, with ammonium sulphate being used as a by-product, which is used as a fertilizer in the pornhospoid industry. Sometimes ammonia gas is trapped in nitrate solutions to form ammonia. An example is ammonium nitrate ammonium nitrate, which is used to produce combined fertilizers. In the abovementioned cases, the use of ammonia from the off-gases generates by-products, which are often difficult to dispose of.
Vyššie uvedené nedostatky sú zmiernené spůsobom zachytávania amoniaku z plynov, podstata ktorého spočívá v· tom, že sa, amoiiak absorbuje vo vodnom roztoku, alebo suspenzii fenoxyoctových kyselin. Fenoxyoctové kyseliny — je to zmes kyseliny 2-metyl-4-chlórfenoixyoctovej, 2-metyl-4,6-dichlórfenoxyoctovej, 2-metyl-6-chlórfenoxyoctovej a 2-metylfenoxyoctovej. Po absorpcii amoniak zreaguje s fenoxyoctovými kyselinami na amonmú sol' fenoxyoctových kyselin.The aforementioned drawbacks are alleviated by the method of trapping ammonia from the gases, which consists in absorbing the ammonia in an aqueous solution or suspension of phenoxyacetic acids. Phenoxyacetic acid - a mixture of 2-methyl-4-chlorophenoxyacetic acid, 2-methyl-4,6-dichlorophenoxyacetic acid, 2-methyl-6-chlorophenoxyacetic acid and 2-methylphenoxyacetic acid. After absorption, ammonia reacts with phenoxyacetic acids to form the ammonium salt of phenoxyacetic acids.
Fenoxyoctové kyseliny obsahujú 50 až 100 pere. hmot. 2-metyl-4-chlórfenoxyoctovej kyseliny.Phenoxyacetic acids contain 50 to 100 pens. wt. Of 2-methyl-4-chlorophenoxyacetic acid.
Výhodné je možné absorpciu robit na absorpčnej kolóne nepřetržíte.Advantageously, the absorption can be carried out on the absorption column.
Výhodou sposobu využitia amoniaku z plynov podta vynálezu je, že sa získá amónna sol' fenioxyoctových kyselin, ktorá sa může použit ako herbicid. Výhodné je možné sposob použit vo výrobní, kde sa připravuje amonná sol’ fenoxyoctových kyselin a absorpčný roztok sa může použiť například na jej riedenie na predpísanú koncentráciu. Vzhladom k tornu, že pri absorpcii prebieha chemická reakcia, odplyn z absorpcie prakticky neobsahuje amoniak, číže sa amoniak využije na 100 &o. Pri absorpcii nevznikajú vedtajšie produlny.An advantage of the method of utilizing ammonia from the gases of the invention is that an ammonium salt of phenioxyacetic acids is obtained which can be used as a herbicide. Advantageously, the process can be used in a process where the ammonium salt of phenoxyacetic acids is prepared and the absorption solution can be used, for example, to dilute it to a prescribed concentration. Due to the fact that the chemical reaction takes place during the absorption, the exhaust gas from the absorption practically does not contain ammonia, which means that the ammonia is used at 100 < 0 > Absorption does not give rise to by-products.
Příklad 1Example 1
V absorpčnej kolóne priemru 4 cm, výšky 70 cm naplnenej Raschigovými krúžkami sa absorboval amoniak. Na hlavu kolony sa dávkovala suspenzia cca 1 % hmot. fenoxyoctových kyselin, z ktorých bolo 57,3 % hmot. 2-metyl-4-chló'rfenoxyoetovej kyseliny. Prietok bol 0,5 1/min. Protiprúdne zo spodu kolony sa privádzal plyn, ktorý obsahoval amoniak v rozmedzí 0,1 až 0,35 pere. hmot. Odplyn sa odvádzal z hlavy kolony. Absorpcla prebiehala dovtedy, dokial' hodnota pH absorpčného roztoku nedosiahla 5,5. Potom sa absorpcla ukončila a absorpčný roztok sa použil na riedenie fenoxyoctanu amonného (Dikotex 40).Ammonia was absorbed in a 4 cm diameter absorption column, 70 cm high packed with Raschig rings. A slurry of about 1 wt. of phenoxyacetic acids, of which 57.3 wt. Of 2-methyl-4-chloro-phenoxy-acetic acid. The flow rate was 0.5 L / min. A gas containing ammonia in the range of 0.1 to 0.35 pens was fed countercurrently from the bottom of the column. wt. The exhaust was removed from the column head. The absorption was continued until the pH of the absorbent solution reached 5.5. The absorption was then terminated and the absorption solution was used to dilute ammonium phenoxyacetate (Dikotex 40).
Příklad 2Example 2
Postupovalo sa podta příkladu 1 s tým rozdielom, že po dosiahnutí hodnoty pH 3 sa k roztoku· opatoovne přidali fenoxyoctové kyseliny tak, aby vznikla cca 0,5 % hmot. suspenzia fenoxyoctových kyselin.The procedure of Example 1 was followed except that once the pH reached 3, phenoxyacetic acids were again added to the solution to give about 0.5 wt. a suspension of phenoxyacetic acids.
Po absorpcii sa roztok použil na úpravu koncentrácie fenoxyoctanu amonného (Dikotex 40).After absorption, the solution was used to adjust the concentration of ammonium phenoxyacetate (Dikotex 40).
P r i k 1 a d 3Example 1 and d 3
Postupovalo sa podta příkladu 1 s tým rozdielom, že fenoxyoctové kyseliny obsahovali 98,6 % hmot. 2-metyl-4-chlórfenoxyoctovej kyseliny. Získaný absorpčný roztok sa použil na riedenie fenoxyoctanu amonného (Dikotex 40).The procedure of Example 1 was followed except that the phenoxyacetic acids contained 98.6% by weight. Of 2-methyl-4-chlorophenoxyacetic acid. The absorbent solution obtained was used to dilute ammonium phenoxyacetate (Dikotex 40).
P r i k 1 a d 4Example 1 and d 4
Postupovalo sa podta příkladu 1 s tým rozdielom, že sa miesto suspenzie použil vodný roztok fenoxyoctových kyselin koncentrácie 5,4 g/1.The procedure of Example 1 was followed except that an aqueous solution of phenoxyacetic acids of a concentration of 5.4 g / l was used instead of the suspension.
Získaný roztok po absorpcii sa použil na riedenie fenoxyoctanu amonného· (Dikotex 40).The resulting absorption solution was used to dilute ammonium phenoxyacetate (Dikotex 40).
Vynález je možné použiť pri absorpcii odplynov z výroby fenoxyoctanu amonného. Výhodou je, že sa zachytí prakticky z odplynov· vš.etok amoniak, ktorý i v malých množstvách zapříčiňuje nepříjemný zápach, čím sa zlepší životné prostredie.The invention is applicable to the absorption of off-gases from the production of ammonium phenoxyacetate. The advantage is that virtually all ammonia is captured from the flue gases, which even in small quantities causes an unpleasant odor, thereby improving the environment.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS845632A CS243945B1 (en) | 1984-07-23 | 1984-07-23 | Method of ammonia trapping from relief gases |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS845632A CS243945B1 (en) | 1984-07-23 | 1984-07-23 | Method of ammonia trapping from relief gases |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CS563284A1 CS563284A1 (en) | 1985-09-17 |
| CS243945B1 true CS243945B1 (en) | 1986-07-17 |
Family
ID=5401545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CS845632A CS243945B1 (en) | 1984-07-23 | 1984-07-23 | Method of ammonia trapping from relief gases |
Country Status (1)
| Country | Link |
|---|---|
| CS (1) | CS243945B1 (en) |
-
1984
- 1984-07-23 CS CS845632A patent/CS243945B1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CS563284A1 (en) | 1985-09-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE69420463T2 (en) | Process for extracting undesirable substances from a biogas | |
| DE2405968C3 (en) | Process for removing sulfur dioxide from combustion exhaust gases | |
| DE69908611T2 (en) | METHOD FOR CONTROLLING AMMONIA SLIP IN THE REDUCTION OF SULFUR DIOXIDE EMISSIONS | |
| DE4015284C1 (en) | ||
| DE2653863A1 (en) | PROCESS FOR MANUFACTURING CATALYSTS FOR AMMONOXYDATION | |
| CH660983A5 (en) | METHOD FOR REMOVING NITROGEN OXYDES FROM EXHAUST GASES. | |
| DE4123155A1 (en) | PROCESS FOR SIMULTANEOUS DEHUMPING AND DEHYDRATION IN AN OVEN | |
| CS243945B1 (en) | Method of ammonia trapping from relief gases | |
| DE2625005B2 (en) | Process for removing nitrogen dioxide from exhaust gases | |
| DE3000383C2 (en) | Process for the catalytic reduction of nitrogen oxides | |
| EP0223904B1 (en) | Process for purifying an industrial or a flue gas | |
| DE69119577T2 (en) | Process for converting uranyl compounds to UO2 via ADU | |
| DE1593149C3 (en) | Process for the production of acrylonitrile or methacrylonitrile from propylene or isobutylene | |
| Fox et al. | The Determination of Urea Alone and in the Presence of Cyanamide by Means of Urease. | |
| CS243944B1 (en) | Method of dimethylamine trapping from relief gases | |
| RU2154622C1 (en) | Process for production of mineral fertilizers | |
| DE1289528B (en) | Process for the continuous production of ª ‡ - and ª † -picolin | |
| SU1388397A1 (en) | Method of producing ammophos with zinc | |
| RU2142927C1 (en) | Method of production of phosphate fertilizer | |
| SU1449564A1 (en) | Method of producing granulated carbamide | |
| DE1267671C2 (en) | Process for the recovery of sulfur oxides and ammonia from the aqueous scrubbing solution of the ammonia laundry of exhaust gases containing sulfur dioxide | |
| DE1278424B (en) | Process for the production of acetic acid | |
| SU141489A1 (en) | Process for producing microfertilizers | |
| DE936264C (en) | Process for the production of hydroxylamine sulfate | |
| EP0106250B1 (en) | Process for the removal of nitrogen dioxide from exhaust gases |