CS243944B1 - The method of capturing dimethylamine from the offgas - Google Patents
The method of capturing dimethylamine from the offgas Download PDFInfo
- Publication number
- CS243944B1 CS243944B1 CS845631A CS563184A CS243944B1 CS 243944 B1 CS243944 B1 CS 243944B1 CS 845631 A CS845631 A CS 845631A CS 563184 A CS563184 A CS 563184A CS 243944 B1 CS243944 B1 CS 243944B1
- Authority
- CS
- Czechoslovakia
- Prior art keywords
- dimethylamine
- phenoxyacetic acids
- phenoxyacetic
- absorption
- methyl
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Vynález sa týká chémie. Rieši zachytávanie dimetylamínu z odplynov, pričom vzniká dimetylamínová sol' fenoxyoctových kyselin. Dimetylamín sa absorbuje a zreaguje s fenoxyoctovými kyselinami na dimetylamíniovú sol1 fenoxyoctových kyselin, pričom fenoxyoctové kyseliny obsahujú 50 až 100 pere. — 2-metyl-4-chlórfenoixyoictovej kyseliny. Najlepšie sa proces uskutočňuje v absorpčně) kolóne. Získaný absorpčný roztok sa rnože použit na riedenie dimetylami.novej soli fenoxyioctových kyselin (Aminex N, Aminex pur). Vynález je možné uplatnit hlavně při výrobě dimetylamínových solí fenoxyoctových kyselin, ktoré sa používajú ako herbicidy v poínohoepodárstve.The invention relates to chemistry. It solves the problem of capturing dimethylamine from exhaust gases, whereby the dimethylamine salt of phenoxyacetic acids is formed. Dimethylamine is absorbed and reacted with phenoxyacetic acids to form the dimethylamine salt of phenoxyacetic acids, wherein the phenoxyacetic acids contain 50 to 100 per. — 2-methyl-4-chlorophenoxyacetic acid. The process is best carried out in an absorption column. The absorption solution obtained can be used to dilute the dimethylamine salt of phenoxyacetic acids (Aminex N, Aminex pur). The invention can be applied mainly in the production of dimethylamine salts of phenoxyacetic acids, which are used as herbicides in agriculture.
Description
Vynález sa týká chémie.The invention relates to chemistry.
Rieši zachytávanie dimetylamínu z odplynov, pričom vzniká dimetylamínová sol' fenoxyoctových kyselin.It solves the uptake of dimethylamine from the offgas to form the dimethylamine salt of phenoxyacetic acids.
Dimetylamín sa absorbuje a zreaguje s fenoxyoctovými kyselinami na dimetylamíniovú sof fenoxyoctových kyselin, pričom fenoxyoctoivé kyseliny obsahujú 50 až 100 pere. — 2-metyl-4-chlórfenoxyoctovej kyseliny.Dimethylamine is absorbed and reacted with phenoxyacetic acids to dimethylamine salt of phenoxyacetic acids, with phenoxyacetic acids containing 50-100 pounds. 2-methyl-4-chlorophenoxyacetic acid.
Najlepšie sa proces uskutečňuje v absorpčně] kolóne. Získaný absorpčný roztok sa može použit na riedenie dimetylami.novej soli fenoxyioctových kyselin (Amlnex N, Aminex pur).The process is best carried out in an absorption column. The absorption solution obtained can be used to dilute the phenyloxyacetic acid dimethyl amine salt (Amlnex N, Aminex pur).
Vynález je možné uplatnit hlavně při výrobě dimetylamínových solí fenoxyoctových kyselin, ktoré sa používajú ako herbicidy v polnohoepodárstve. 243944 3 4 243944The invention is particularly applicable to the production of dimethylamine salts of phenoxyacetic acids, which are used as herbicides in the field. 243944 3 4 243944
Vynález rieši sposob zachytávania dim,etylamínu, z odplynov, ktoré vznikajú pri výrobě dimetylamínu, alebo jeho spracovaní.The invention solves the methods of trapping dim, ethylamine, off-gases produced during the production of dimethylamine or its processing.
Dimetylamín patří z chemického hlediska medzi deriváty amoniaku. Má teplotu varu 7 °C, z toho dovodu je vel'mi prchavý, čo zapříčiňuje ťažkosti při jeho- spracovaní. Vzhladom k tomu, že dimetylamín je derivát amoniaku, jeho zachytává,nie z odplynov sa rieši obdobné ako u amoniaku. Najčastejšie sa dimetylamín z odplynov absorbuje vo vodě za vzniku zriedeného roztoku dimetylamínu. Určitá nevýhoda pri absorpcii je, že zriedené roztoky do cca 15 % hmot. majú vyššiu teplotu tuhnutia — cca — . 3 °C, čo je nevýhoda v zimných mesiacoch. Pri jednokolónovom absorpčnom systéme v odplyne z kolony odchádza část dimetylamínu. Z toho dovodu sa pracuje najčastejšie s dvojkolónovým absorpčným systém,om,.Dimethylamine is chemically among ammonia derivatives. It has a boiling point of 7 ° C, which makes it very volatile, which makes it difficult to process. Since dimethylamine is a derivative of ammonia, its catches, not from the off-gases, is solved similarly to that of ammonia. Most often, dimethylamine is absorbed from the offgas in water to form a dilute dimethylamine solution. A certain disadvantage in absorption is that dilute solutions up to about 15% by weight. have a higher pour point - approx. 3 ° C, which is a disadvantage in the winter months. In the monoclonal absorption system, a portion of the dimethylamine is withdrawn from the column from the column. Accordingly, it is most commonly used with a two-column absorption system.
Vyššie uvedené nedostatky sú zmiernené sposobom využitia dimetylamínu z odplynov, podstata ktorého je v tom, že sa dimetylamín z odplynov absorbuje vo vodnom roztoku, alehO' suspenzii fenoxyoctových kyselin. Fenoxyoctové kyseliny — je to* zrn,es kyseliny 2-metyl-4-chlórfenoxyoctovej, 2-m.etyl-4,6-dichlórfenoixyoctovej, 2-metyl-6-chlórfenoxyoctovej, 2-metyl-fenoxyoctovej.The aforementioned drawbacks are alleviated by the use of dimethylamine from off-gases, the dimethylamine being absorbed from the off-gases in an aqueous solution but a suspension of phenoxyacetic acids. Phenoxyacetic acids - this is 2-methyl-4-chlorophenoxyacetic acid, 2-methyl-4,6-dichlorophenoxy acetic acid, 2-methyl-6-chlorophenoxyacetic acid, 2-methyl-phenoxyacetic acid.
Po absorpcii dimetylamín zreaguje s fenoxyoctovými kyselinami na dimetylaimínovú sol' fenoxyoctových kyselin.After absorption, dimethylamine is reacted with phenoxyacetic acids to dimethylaimine salt of phenoxyacetic acids.
Fenoxyoctové kyseliny obsahujú 50 až 100 pere. hmot. 2-metyl-4-chlórfenoxyoetovej kyseliny. Výhodné je možné absorpciu robit na .absorpčnej kolóne, pričom je možno procesí viesť nepřetržíte. Výhodou sposobu využitia dimetylamínu z odplynov podlá vynálezu je, že sa absorpciou získá dimetylamínová sol' fenoxyoctových kyselin, ktorá sa priamo može použit ako herbicid v obilninách. Samotný sposob je možné výhodné použit hlavně pri výrobě dimetylamínovej soli fenoxyoctových kyselin a absorpčný roztok sa může použit na jej riedenie na predpísanú koncentráciu výrobku. Vzhladom k tomu, že pri absorpcii prebieha chemická reakcia, odplyn z absorpcie prakticky neobsahuje dimetylamín, na absorbciu sa můžu použit j.edno- duché zariadenia. Pri tomto sposobe absorpcie nevznikajú vedlajšie produkty a ni;e sú starosti s ich využitím. Příklad 1 f V absorpčnej kolóne priemeru 40 mm, výšky 700 mm, naplnenej Raschigovými krúžkami sa absorboval dimetylamín. Na hlavu kolony sa dávkovala suspenzia s hmotnostným obsahom 1 % fenoxyoctových kyselin, z ktorých bolo 61,2 % hmot. 2-metyl-4-chlórfenoxyoctovej kyseliny.Phenoxyacetic acids contain 50 to 100 pounds. wt. 2-methyl-4-chlorophenoxyoethic acid. Preferably, the absorption can be carried out on an absorption column, whereby the process can be conducted continuously. An advantage of the method of using dimethylamine from the degasses of the present invention is that the dimethylamine salt of phenoxyacetic acid is obtained by absorption, which can be used directly as a herbicide in cereals. The method itself can be advantageously used mainly in the production of dimethylamine salt of phenoxyacetic acids and the absorption solution can be used to dilute it to the prescribed product concentration. Since a chemical reaction takes place during absorption, the absorption gas is substantially free of dimethylamine, and simple devices can be used for absorption. In this way of absorption there are no byproducts and they are concerned about their use. EXAMPLE 1 Dimethylamine was absorbed in a 40 mm diameter 700 mm diameter absorption column filled with Raschig rings. A suspension of 1% by weight of phenoxyacetic acids, of which 61.2% by weight, was dispensed per column head. 2-methyl-4-chlorophenoxyacetic acid.
Prietok suspenzie bol 0,5 l/min. Protiprúdne zospodu kolony sa privádzal plyn obsahujúci dimetylamín v rozmedzí 0,25 až 0,4 pere. hmot. Po absorpcii dimetylamínu zreagoval s fenoxyoctovými kyselinami na roztok. Absorpcia prebiehala dovtedy, pokial hodnota pH absorpčného roztoku nedosiahla 5,7. Absorpcia sa potom ukončila a absorpčný roztok sa použil na riedenie dimetylamínovej soli fenoxyoctových kyselin (Aminex N). P r ík 1 a d 2The slurry flow rate was 0.5 l / min. A dimethylamine-containing gas in the range of 0.25 to 0.4 pounds was fed countercurrently from below the column. wt. Upon absorption of dimethylamine, it was reacted with phenoxyacetic acids to form a solution. Absorption continued until the pH of the absorbent solution reached 5.7. The absorption was then stopped and the absorption solution was used to dilute the phenoxyacetic acid dimethylamine salt (Aminex N). Lines 1 and d 2
Postupovalo sa podlá příkladu 1 s tým rozdielom, že obsah 2-metyl-4-chlórfenoxyoctovej kyseliny v fenoxyoctových kyselinách bol 93,1 % hmot. a po dosiahnutí hodnoty pH absorpčného roztoku 5,2 sa k roztoku opatovne přidali fenoxyoctové kyseliny, aby sa dosiahla cca 1 % hmot. suspenzia fenoxyoctových kyselin.The procedure of Example 1 was followed except that the content of 2-methyl-4-chlorophenoxyacetic acid in phenoxyacetic acids was 93.1% by weight. and when the pH of the absorbent solution 5.2 is reached, phenoxyacetic acid is carefully added to the solution in order to obtain about 1 wt. phenoxyacetic acid suspension.
Po absorpcii sa roztok použil na úpravu koncentrácie dimetylamínovej soli fenoxyoctových kyselin (Aminex pur). Příklad 3After absorption, the solution was used to adjust the concentration of the dimethylamine salt of phenoxyacetic acids (Aminex pur). Example 3
Postupovalo sa podlá příkladu 1 s tým rozdielom, že sa na absorpciu miesto suspenzie použil vodný roztok fenoxyoctových kyselin koncentrácie 5,1 g/l.The procedure of Example 1 was followed except that an aqueous solution of phenoxyacetic acids at a concentration of 5.1 g / l was used to absorb instead of the slurry.
Vynález je možné použit pri absorpcii odplynov z výroby dimetylamínovej soli fenoxyoctových kyselin. Výhodou je, že sa z odplynu zachytí prakticky všetok dimetylamín, ktorý i v malých množstvách zapříčiňuje nepříjemný zápach, ktorého odstránením sa zlepší životné prostredie.The invention can be used in the absorption of degasses from the production of dimethylamine salt of phenoxyacetic acids. The advantage is that virtually all dimethylamine is captured from the off-gas, which, even in small amounts, causes an unpleasant odor whose removal will improve the environment.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CS845631A CS243944B1 (en) | 1984-07-23 | 1984-07-23 | The method of capturing dimethylamine from the offgas |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CS845631A CS243944B1 (en) | 1984-07-23 | 1984-07-23 | The method of capturing dimethylamine from the offgas |
Publications (2)
Publication Number | Publication Date |
---|---|
CS563184A1 CS563184A1 (en) | 1985-09-17 |
CS243944B1 true CS243944B1 (en) | 1986-07-17 |
Family
ID=5401537
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CS845631A CS243944B1 (en) | 1984-07-23 | 1984-07-23 | The method of capturing dimethylamine from the offgas |
Country Status (1)
Country | Link |
---|---|
CS (1) | CS243944B1 (en) |
-
1984
- 1984-07-23 CS CS845631A patent/CS243944B1/en unknown
Also Published As
Publication number | Publication date |
---|---|
CS563184A1 (en) | 1985-09-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE69109577T2 (en) | Process for the absorption of sulfur compounds from fluids using heterocyclic compounds which contain at least one nitrogen atom in the ring system. | |
DE69408662T2 (en) | METHOD FOR PRODUCING AMINO ACID SALTS | |
DE2636489C2 (en) | Process for the production of sodium benzoate | |
DE69623377T2 (en) | Process for the condensation of hydrogen cyanide with an aldehyde | |
DE69331314T2 (en) | Process for the preparation of N-phosphonomethyliminodiacetic acid | |
CH434285A (en) | Process for the production of the L-aspartic acid salt of L-ornithine or its monohydrate | |
EP0012371B1 (en) | Process for the preparation of 2-imidazolines | |
CS243944B1 (en) | The method of capturing dimethylamine from the offgas | |
DE3123936C2 (en) | ||
DE3000383C2 (en) | Process for the catalytic reduction of nitrogen oxides | |
DE69103214T2 (en) | Process for the purification of glycine. | |
DE69518027T2 (en) | Process for the production of acrylamide | |
DE69519799T2 (en) | METHOD FOR THE PRODUCTION OF [S, S] -ETHYLENE DIAMINE-N, N'-DIBERONIC ACID | |
DE3876267T2 (en) | METHOD FOR PRODUCING ALDEHYDES. | |
DE2744305A1 (en) | PROCESS FOR THE PREPARATION OF AN AQUATIC SOLUTION OF AN ALKALINE SALT OF AN ALPHA-KETOCARBONIC ACID | |
DE69414304T2 (en) | Process for reducing the ammonia content of exhaust gases from urea manufacturing plants | |
CS243945B1 (en) | The method of capturing ammonia from the offgas | |
DE60014102T2 (en) | PROCESS FOR THE PRODUCTION OF BETAINES | |
KR950004048B1 (en) | Process for the preparation of an aqueous solution of the sodium salt of methionine | |
DE2720551B2 (en) | Substituted succinic acids and methods of treating hard water and making phosphinico-substituted aliphatic carboxylic acids | |
SU1261909A1 (en) | Method of producing ammonium hexavanadate | |
AT203494B (en) | Process for the purification of pyridinecarboxamides via their nitriles | |
DE538449C (en) | Process for the production of calcium cyanide | |
DD204612A1 (en) | PROCESS FOR SYNTHESIS OF METHYLMERCAPTO-BIS-ALKYLAMINO-S-TRIAZINES | |
CS261785B1 (en) | Method of sulfur dioxide recovery in alkylamination |