CS243944B1 - Method of dimethylamine trapping from relief gases - Google Patents
Method of dimethylamine trapping from relief gases 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
- absorption
- acids
- phenoxyacetic acids
- Prior art date
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- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 239000007789 gas Substances 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000010521 absorption reaction Methods 0.000 claims abstract description 24
- LCPDWSOZIOUXRV-UHFFFAOYSA-N phenoxyacetic acid Chemical class OC(=O)COC1=CC=CC=C1 LCPDWSOZIOUXRV-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000002253 acid Substances 0.000 claims abstract 3
- 239000005574 MCPA Substances 0.000 claims description 6
- WHKUVVPPKQRRBV-UHFFFAOYSA-N Trasan Chemical compound CC1=CC(Cl)=CC=C1OCC(O)=O WHKUVVPPKQRRBV-UHFFFAOYSA-N 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 3
- QJVXBRUGKLCUMY-UHFFFAOYSA-N 2-(2-methylphenoxy)acetic acid Chemical compound CC1=CC=CC=C1OCC(O)=O QJVXBRUGKLCUMY-UHFFFAOYSA-N 0.000 claims description 2
- 239000007900 aqueous suspension Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 239000000243 solution Substances 0.000 abstract description 10
- PKAUICCNAWQPAU-UHFFFAOYSA-N 2-(4-chloro-2-methylphenoxy)acetic acid;n-methylmethanamine Chemical compound CNC.CC1=CC(Cl)=CC=C1OCC(O)=O PKAUICCNAWQPAU-UHFFFAOYSA-N 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000002250 absorbent Substances 0.000 abstract description 2
- 230000002745 absorbent Effects 0.000 abstract description 2
- 239000004009 herbicide Substances 0.000 abstract description 2
- 101150037491 SOL1 gene Proteins 0.000 abstract 1
- 239000012895 dilution Substances 0.000 abstract 1
- 238000010790 dilution Methods 0.000 abstract 1
- -1 dimethylamine salts acids Chemical class 0.000 abstract 1
- JHIXTEJOJUJWJY-UHFFFAOYSA-N n-methylmethanamine;2-phenoxyacetic acid Chemical class CNC.OC(=O)COC1=CC=CC=C1 JHIXTEJOJUJWJY-UHFFFAOYSA-N 0.000 abstract 1
- 125000002147 dimethylamino group Chemical class [H]C([H])([H])N(*)C([H])([H])[H] 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical class N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- QUSNBJAOOMFDIB-UHFFFAOYSA-N Ethylamine Chemical compound CCN QUSNBJAOOMFDIB-UHFFFAOYSA-N 0.000 description 2
- 235000013339 cereals Nutrition 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
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000002363 herbicidal effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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. Resolves the capture of dimethylamine from off-gases, producing a dimethylamine salt phenoxyacetic acids. Dimethylamine is absorbed and reacted with phenoxyacetic acids to dimethylammonium sol1 phenoxyacetic acids, wherein phenoxyacetic acids contain 50 to 100 pen. 2-methyl-4-chlorophenoixynicic acid. The best process is done in absorption) column. Absorbent solution obtained is used for dilution with dimethylamium phenoxyacetic acid salts (Aminex N, Aminex pur). The invention can be applied mainly in manufacturing phenoxyacetic dimethylamine salts acids used as herbicides in agriculture.
Description
Vynález rieši sposob zachytávania dim,etylamínu, z odplynov, ktoré vznikajú pri výrobě dimetylamínu, alebo jeho spracovaní.SUMMARY OF THE INVENTION The present invention is directed to a process for capturing dim, ethylamine, from off-gases produced in the manufacture of dimethylamine, or its treatment.
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 an ammonia derivative. It has a boiling point of 7 ° C, which makes it very volatile, which causes difficulties in its processing. Since dimethylamine is an ammonia derivative, it retains it, not from the off-gas, it is treated similarly to ammonia. Most often, the dimethylamine from the offgasses is absorbed in water to form a dilute dimethylamine solution. A certain disadvantage of absorption is that dilute solutions up to about 15 wt. have a higher pour point - approx. 3 ° C, which is a drawback in the winter months. In a single-column absorption system, some of the dimethylamine is removed from the column in the off-gas. For this reason, a two-column absorption system, most commonly used, is employed.
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 the off-gases, which is characterized in that dimethylamine from the off-gases is absorbed in an aqueous solution or a suspension of phenoxyacetic acids. Phenoxyacetic acid is a grain of 2-methyl-4-chlorophenoxyacetic acid, 2-methyl-4,6-dichlorophenoxyacetic acid, 2-methyl-6-chlorophenoxyacetic acid, 2-methylphenoxyacetic acid.
Po absorpcii dimetylamín zreaguje s fenoxyoctovými kyselinami na dimetylaimínovú sol' fenoxyoctových kyselin.After absorption, the dimethylamine is reacted with phenoxyacetic acids to form the dimethylaimine salt of phenoxyacetic acids.
Fenoxyoctové kyseliny obsahujú 50 až 100 pere. hmot. 2-metyl-4-chlórfenoxyoetovej kyseliny.Phenoxyacetic acids contain 50 to 100 pens. wt. Of 2-methyl-4-chlorophenoxy-acetic acid.
Výhodné je možné absorpciu robit na .absorpčnej kolóne, pričom je možno procesí viesť nepřetržíte.Advantageously, the absorption can be carried out on an absorption column, and the process can be carried out continuously.
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.ednoduché zariadenia. Pri tomto sposobe absorpcie nevznikajú vedlajšie produkty a ni;e sú starosti s ich využitím.An advantage of the method of utilizing dimethylamine from the off-gases according to the invention is that the dimethylamine salt of phenoxyacetic acids is obtained by absorption, which can be used directly as a herbicide in cereals. The process itself can be advantageously used mainly in the production of the dimethylamine salt of phenoxyacetic acids and the absorption solution can be used to dilute it to the prescribed product concentration. Since the chemical reaction takes place during absorption, the absorption gas is virtually free of dimethylamine, and simple devices can be used for absorption. In this manner of absorption, no by-products are formed and there is no concern for their use.
Příklad 1 fExample 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.Dimethylamine was absorbed in a 40 mm diameter, 700 mm high absorption column packed with Raschig rings. A 1 wt.% Slurry of phenoxyacetic acids, of which 61.2 wt. Of 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).The suspension flow rate was 0.5 L / min. A dimethylamine-containing gas in the range of 0.25 to 0.4 pens was fed countercurrently from the bottom of the column. wt. After absorption of dimethylamine, it was reacted with phenoxyacetic acids to form a solution. Absorption was continued until the pH of the absorbent solution reached 5.7. The absorption was then terminated and the absorption solution was used to dilute the dimethylamine salt of phenoxyacetic acids (Aminex N).
P r ík 1 a d 2Example 1 a 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 after reaching the pH of the absorption solution of 5.2, phenoxyacetic acids were carefully added to the solution to reach about 1 wt. a suspension of phenoxyacetic acids.
Po absorpcii sa roztok použil na úpravu koncentrácie dimetylamínovej soli fenoxyoctových kyselin (Aminex pur).After absorption, the solution was used to adjust the concentration of the dimethylamine salt of phenoxyacetic acids (Aminex pur).
Příklad 3Example 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 of a concentration of 5.1 g / l was used instead of the suspension for absorption.
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 is applicable to the absorption of off-gases from the production of the dimethylamine salt of phenoxyacetic acids. The advantage is that virtually all dimethylamine is trapped from the off-gas, which even in small amounts causes an unpleasant odor, which will improve the environment by removing it.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS845631A CS243944B1 (en) | 1984-07-23 | 1984-07-23 | Method of dimethylamine trapping from relief gases |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS845631A CS243944B1 (en) | 1984-07-23 | 1984-07-23 | Method of dimethylamine trapping from relief gases |
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 | Method of dimethylamine trapping from relief gases |
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 |
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