CS270548B1 - Method of 2-ethyl-6-methyl-n-/1 -methoxy-2-propyl/aniline preparation - Google Patents

Method of 2-ethyl-6-methyl-n-/1 -methoxy-2-propyl/aniline preparation Download PDF

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CS270548B1
CS270548B1 CS89393A CS39389A CS270548B1 CS 270548 B1 CS270548 B1 CS 270548B1 CS 89393 A CS89393 A CS 89393A CS 39389 A CS39389 A CS 39389A CS 270548 B1 CS270548 B1 CS 270548B1
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methoxy
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methoxypropanone
propanol
ethyl
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CS39389A1 (en
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Emanuel Ing Csc Beska
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Beska Emanuel
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Abstract

vyriešenýJe sposob pripravy 2-etyl- -6-metyl-N-/l -metoxy-2 -propyl/ anilinu hydrogenačnou alkyláciou 2-atyl-6-metylanillnu metoxypropanonom v proatradi l-metoxy-2-propanolu a v přítomnosti platinového hydrogenačného katalyzátore a kyseliny trihydrogénfosforečnej alebo kyseliny slrovej ako protonového katalyzátore. Z výslednej reakčnej zmesi ea odfiltruje použitý platinový hydrogenačný katalyzátor, filtrát aa zmleša a aktivnym uhlím použitým v množstve odpovedajúcotj 1 až 5 násobku množstva použitého rí protonového katalyzátora, za vákua a miešania sa zbaví prchavých podielov, pozostávajúcich z l-metoxy-2-propanolu, metoxypropanónu a vody, z deetilačného u zvyšku sa odfiltruje kvapalná fáza žiadaného reakčného produktu a tuhý podiel pozo8távajúci z aktívneho uhlia a použitého protonového katalyzátora ako taký alebo jeho zložky oddálená přidáním l-metoxy-2-propanolu a/alebo metoxypropanónu a filtráciou sa vracajú rovnako ako izolovaný platinový hydrogenačný katalyzátor, l-metoxy-2-propanol a metoxypropanon do ďalšieho cyklu procesu. Riešsnie je možné využit v chemickom priemysie pri výrobě prostriedkov na ochranu rastlin.solved is the method of preparing 2-ethyl- -6-methyl-N- (1-methoxy-2-propyl) aniline by hydrogenation alkylation of 2-atyl-6-methylaniline methoxypropanone in proatradi 1-methoxy-2-propanol and in the presence of platinum hydrogenation catalyst a phosphoric acid or acid as a proton catalyst. The resulting reaction mixture was filtered off platinum hydrogenation used catalyst, filtrate, and blend and act the coal used in an amount corresponding to the amount of coal 1 to 5 times the amount used proton catalyst, under vacuum and stirring to get rid of volatile constituents from 1-methoxy-2-propanol, of methoxypropanone and water, from deetilizing for the residue, the desired liquid phase is filtered off reaction product and solids based on activated carbon and used the proton catalyst itself or its components delayed by the addition 1-methoxy-2-propanol and / or methoxypropanone and filtration returns as well as an isolated platinum hydrogenation catalyst, 1-methoxy-2-propanol and methoxypropanone into the next process cycle. Riešsnie can be used in the chemical industry protection products plants.

Description

Vynález sa týká sposobu přípravy 2-etyl-6-mstyl-N-/l -metoxy-2 -propyl/ anilinu. Uvedená zlúčenina je známa ako medziprodukt na výrobu chemických prostriedkov na ochranu rastlín.The invention relates to a process for the preparation of 2-ethyl-6-methyl-N- [1-methoxy-2-propyl] aniline. Said compound is known as an intermediate for the production of chemical plant protection products.

2-etyl-6-metyl-N-/l'-metoxy-2'-propyl/ anilin je možné připravit reakciou 2-etyl-6-mstylanilinu a 2-bróm-l-metoxypropánom, kondenzáciou 2-etyl-6-metylanilinu s metoxypropanónom a následnou hydrogenáciou 2-etyl-6-metyl-N-/l'-metoxy-2'-propylidén/arfilínu /AO 270 153, AO 270 154/ alebo hydrogenačnou alkyláciou 2-etyl-6-metylanilinu s metoxypropanónom na platinovom katalyzátore /CS AO 169 841, AO 266 994, AO 266 995, AO 266 996, AO 267 385/. Hydrogenačná alkylácie se uskutečňuje v prostředí rozpúštadla ako je metanol, etanol, l-metoxy-2-propanol a v přítomnosti protonového katalyzátore ako je kyselina octová, kyselina chlorovodíková, kyselina trihydrogénfosforečná, připadne dalšie. Nevýhodou takto uskutečňovaného procesu hydrogenačnej alkylácie je obtiažna izolácia protonového katalyzátora z reakčnej zmesi za účelom jeho opatovného použitie v procese v záujme zlepáenia jeho ekonomiky e ekologie. Najúčinnejšie protonové katalyzátory ako je trihydrogénfosforečná a sírová kyselino sa totiž nachádzajú vo výslednej reakčnaj zmesi vo forme kvartérnych soli s 2-etyl-6-mstyl-N-/l'-metoxy-2'-propyl/ anilinem a po oddestilovaní prchavých frakci! pri jeho izélácii zostávajú nerozpustné v polotuhej konzistenci!, pričom sa lepia na steny destilačného zariadenia, z ktorých je ich možné len tažko mechanicky odstránit. Po odděleni 2-etyl-6-metyl-N-/l'-metoxy-2'-propyl/ anilinu je potřebné uvedené kvartérne soli rozpustit najlepšie pri zvýšenaj teplote napr. vo vodě, l-metoxy-2-propanole alebo metoxypropanóne a potom bud použit v procese hydrogenačnej alkylácie alebo rozkladom pomocou hydroxidu uvolnit a izolovat v nich viazaný reakčný produkt.2-Ethyl-6-methyl-N- [1'-methoxy-2'-propyl] aniline can be prepared by reacting 2-ethyl-6-methyllaniline and 2-bromo-1-methoxypropane, condensing 2-ethyl-6-methylaniline with methoxypropanone and subsequent hydrogenation of 2-ethyl-6-methyl-N- (1'-methoxy-2'-propylidene) arphilin (AO 270 153, AO 270 154) or by hydrogenation alkylation of 2-ethyl-6-methylaniline with methoxypropanone on platinum catalyst / CS AO 169 841, AO 266 994, AO 266 995, AO 266 996, AO 267 385 /. The hydrogenation alkylation is carried out in a solvent such as methanol, ethanol, 1-methoxy-2-propanol and in the presence of a proton catalyst such as acetic acid, hydrochloric acid, trihydrogenphosphoric acid, or others. The disadvantage of the hydrogen alkylation process thus carried out is the difficulty of isolating the proton catalyst from the reaction mixture in order to reuse it in the process in order to improve its economy and ecology. This is because the most effective proton catalysts, such as trihydrogenphosphoric acid and sulfuric acid, are present in the resulting reaction mixture in the form of quaternary salts with 2-ethyl-6-methyl-N- [1'-methoxy-2'-propyl] aniline and after distilling off the volatile fractions! during its isolation, they remain insoluble in a semi-solid consistency, while they adhere to the walls of the distillation apparatus, from which they are difficult to remove mechanically. After separation of 2-ethyl-6-methyl-N- [1'-methoxy-2'-propyl] aniline, it is necessary to dissolve said quaternary salts preferably at elevated temperature, e.g. in water, 1-methoxy-2-propanol or methoxypropanone and then either used in a hydrogen alkylation process or by decomposition with hydroxide to liberate and isolate the bound reaction product bound therein.

Uvedené nedostatky odstraňuje sposob pripravy 2-etyl-6-metyl-N-/l'-metoxy-2'-propyl/ anilinu hydrogenačnou alkyláciou 2-etyl-6-metylanilinu metoxypropanónom v prostředí l-metoxy-2-propanolu v přítomnosti platinového hydrogenačného katalyzátora a kyseliny trihydrogénfosforečnej alebo kyseliny sirovej ako protonového katalyzátora s vracením použitých katalyzátorov, l-metoxy-2-propanolu a metoxypropanónu izolovaných z výslednej reakčnej zmesi do dalšieho cyklu procesu, podía vynálezu. Podstata vynálezu spočívá v tom, že po odfiltrovani^použitého platinového hydrogenačného katalyzátora z výslednej reakčnej zmesi sa filtrát zmieša a aktívnym uhlím použitým v množstva odpovedajúcom 1 až 5 násobku množstva použitého protonového katalyzátora a za vákua a miešania sa destiláciou zbaví prchavých podielov pozostávajúcich z metoxypropanónu, l-metoxy-2-propanolu a vody. Z destilačného zvyšku sa odfiltruje kvapalná fáza pozostávajúca z 2-etyl-N-/1'-metoxy-2'-propyl/ anilinu a tuhý podiel pozostávajúci z aktivneho a použitého protonového katalyzátora ako taký alebo jeho zložky oddělené přidáním l-metoxy-2-propanolu a/alebo metoxypropanónu a filtráciou sa použij# v dalšom cykle procesu.The process for the preparation of 2-ethyl-6-methyl-N- (1'-methoxy-2'-propyl) aniline by the hydrogenation alkylation of 2-ethyl-6-methylaniline with methoxypropanone in the presence of 1-methoxy-2-propanol in the presence of a platinum hydrogenation solution eliminates these drawbacks. of catalyst and trihydrogenphosphoric acid or sulfuric acid as a proton catalyst, returning the used catalysts, 1-methoxy-2-propanol and methoxypropanone isolated from the resulting reaction mixture to the next process cycle, according to the invention. The invention is based on the fact that, after filtering the spent platinum hydrogenation catalyst from the resulting reaction mixture, the filtrate is mixed with activated carbon used in an amount corresponding to 1 to 5 times the amount of proton catalyst used and freed of volatiles consisting of methoxypropanone by vacuum and distillation. 1-methoxy-2-propanol and water. From the distillation residue, the liquid phase consisting of 2-ethyl-N- (1'-methoxy-2'-propyl) aniline and the solid consisting of the active and used proton catalyst as such or its components separated by the addition of 1-methoxy-2- propanol and / or methoxypropanone and filtration is used in the next cycle of the process.

Nésledujúce příklady ilustrujú, ale neobmedzujú predmet vynálezu.The following examples illustrate but do not limit the scope of the invention.

Přiklad 1Example 1

Zmes 6,0 g 2-etyl-6-metylanilinu, 6,0 g metoxypropanónu, 15,4 g l-mstoxy-2-propanolu, 0,21 g 85 % kyseliny trihydrogénfosforečnej s 60 mg platinového katalyzátora na aktívnom uhlí ako nosiči s obsahem platiny 1 % sa hydrogenovala v autokláve pri 50 °C a tlaku vodíka 5,0 MPa počas 3 hod. Po ochladení autoklávu sa filtráciou oddělil platinový katalyzátor a k filtrátu sa přidalo 0,4 g práškového aktivneho uhlia. Za miešania pri vákuu vodnej vývevy sa reakčná zmes zahustila pri teplote kúpeXa 100 °C. Po oddestilovani prchavých podielov /voda, l-metoxy-2-propanol a metoxypropanon/ sa destilačný zvyšok přefiltroval. Filtrát představuje žiadaný produkt 2-etyl-6-mOtyl-N-/l'-matoxy-2'-propyl/ anilín. Na filtraci ostala zmes aktivneho uhlia a použitého protonového katalyzátora, ktorá sa suspendovala v 15,4 g l-metoxy-2-propanolu a filtráciou rozdělila na aktivně > CS 270 548 Bl uhlie a roztok protonového katalyzátora, ktoré sa použili rovnako ako izolovaný platinový hydrogenačný katalyzátor, 1-metoxypropanón a metoxy-2-propanol v dalšom cykle procesu.A mixture of 6.0 g of 2-ethyl-6-methylaniline, 6.0 g of methoxypropanone, 15.4 g of 1-methoxy-2-propanol, 0.21 g of 85% trihydrogenphosphoric acid with 60 mg of platinum catalyst on activated carbon as support with containing 1% platinum was hydrogenated in an autoclave at 50 ° C and a hydrogen pressure of 5.0 MPa for 3 hours. After cooling the autoclave, the platinum catalyst was removed by filtration, and 0.4 g of powdered activated carbon was added to the filtrate. With stirring under a water pump vacuum, the reaction mixture was concentrated at a bath temperature of 100 ° C. After distilling off the volatiles (water, 1-methoxy-2-propanol and methoxypropanone), the distillation residue was filtered. The filtrate is the desired product 2-ethyl-6-methyl-N- [1'-methoxy-2'-propyl] aniline. A mixture of activated carbon and used proton catalyst remained for filtration, which was suspended in 15.4 g of 1-methoxy-2-propanol and separated by filtration into activated> CS 270 548 B1 carbon and a solution of proton catalyst, which were used in the same way as isolated platinum hydrogenation. catalyst, 1-methoxypropanone and methoxy-2-propanol in the next cycle of the process.

Přiklad 2Example 2

Hydrogenačná alkylácia sa uskutečnila so zmesou 6,0 g 2-etyl-6-metylanilinu, 6,0 g metoxypropanónu, 15,4 g l-matoxy-2-přopanolu, 0,21 g 85 % kyseliny trihydrogénfosforečnej a 60 mg platinového katalyzátora na aktivnom uhlí ako nosiči s obsahom 1 % platiny v autokláve pri 50 °C a tlaku vodíka 5 MPa po dobu 3,5 hod. Po ochladení autoklávu sa platinový katalyzátor odfiltroval a přidalo sa 1,0 g práškového aktívneho uhlia. Voda, metoxypropanol a metoxypropanon sa oddestiloval za miešania za vákua vodnej vývevy tak, že teplota destilované] zmesi nepřevýšila 110 °C. Z destilačného zvyšku sa odfiltroval kvppalný 2-etyl-6-metyl-N~/l'-metoxy-2'-propyl/ anilin od aktívneho uhlia s adsorbovaným protonovým katalyzátorem, ktoré sa použilo do dalšej hydrogenačne] alkylácie ako protonový katalyzátor.The hydrogenation alkylation was performed with a mixture of 6.0 g of 2-ethyl-6-methylaniline, 6.0 g of methoxypropanone, 15.4 g of 1-methoxy-2-propanol, 0.21 g of 85% trihydrogenphosphoric acid and 60 mg of platinum catalyst for activated carbon as a carrier containing 1% platinum in an autoclave at 50 ° C and a hydrogen pressure of 5 MPa for 3.5 hours. After cooling the autoclave, the platinum catalyst was filtered off and 1.0 g of powdered activated carbon was added. Water, methoxypropanol and methoxypropanone were distilled off with stirring under a water pump vacuum so that the temperature of the distilled mixture did not exceed 110 ° C. The 2-ethyl-6-methyl-N- (1'-methoxy-2'-propyl) aniline was filtered off from the distillation residue from activated carbon with an adsorbed proton catalyst, which was used for further hydrogenation alkylation as a proton catalyst.

Claims (1)

PŘEDMĚT VYNÁLEZUOBJECT OF THE INVENTION Sposob přípravy 2-etyl-6-metyl-N-/l'-metoxy-2'-propyl/ anilínu hydroganačnou alkyláciou 2-etyl-6-metylanilinu metoxypropanónom v prostředí l-metoxy-2-propanolu a v přítomnosti platinového hydrogenačného katalyzátora a kyseliny trihydrogénfosforečnej alebo kyseliny sírové] ako protonového katalyzátora s vracaním použitých katalyzátorov, l-metoxy-2-propanolu a metoxypropanónu, izolovaných z výsledné] reakčnej zmesi do 3alšieho cyklu hydrogenačne] alkylácie, vyznačujúci sa tým, že po odfiltrovaní použitého platinového hydrogenačného katalyzátora z výsledné] reakčnej zmesi sa filtrát zmieša s aktívnym uhlím použitým v množstva odpovedajúcom 1 až 5 násobku množstva použitého protonového katalyzátora, za vákua a za miešania sa destiláciou zbaví prchavých podielov, z destilačného zvyšku sa odfiltruje kvapalná fáza pozostávajúca z 2-etyl-6-metyl-N-/l'~ -metoxy-2'-propyl/ anilinu a tuhý podiel pozostávajúci z aktívneho uhlia a použitého protonového katalyzátora ako taký alebo jeho zložky oddělené přidáním l-metoxy-2-propanolu a/alebo metoxypropanónu a filtráciou sa vracajú do dalšieho cyklu procesu. ’Process for the preparation of 2-ethyl-6-methyl-N- (1'-methoxy-2'-propyl) aniline by hydrotranslation of 2-ethyl-6-methylaniline with methoxypropanone in 1-methoxy-2-propanol and in the presence of a platinum hydrogenation catalyst and an acid trihydrogenphosphoric acid or sulfuric acid] as a proton catalyst, returning the spent catalysts, 1-methoxy-2-propanol and methoxypropanone, isolated from the final reaction mixture to the next hydrogen alkylation cycle, characterized in that after filtering off the used platinum hydrogenation catalyst from the final catalyst. of the reaction mixture, the filtrate is mixed with activated carbon used in an amount corresponding to 1 to 5 times the amount of proton catalyst used, freed of volatiles in vacuo and stirred by distillation, and the liquid phase consisting of 2-ethyl-6-methyl-N is filtered off from the distillation residue. - (1'-methoxy-2'-propyl) aniline and a solid consisting of activated carbon and the proton catalyst used as such or its components separately by adding 1-methoxy-2-propanol and / or methoxypropanone and returning to the next process cycle by filtration. ’
CS89393A 1989-01-20 1989-01-20 Method of 2-ethyl-6-methyl-n-/1 -methoxy-2-propyl/aniline preparation CS270548B1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LT3260B (en) 1992-12-29 1995-05-25 Ciba Geigy Ag Process for the preparation of 2-alkyl-6-methyl-n-(1'-methoxy-2'-propyl)-aniline and a process for the preparation of their chloroacetanilides
MD706G2 (en) * 1992-12-29 1998-02-28 Циба-Гейги АГ Process for preparation of 2-alkyl-6-methyl-N-(1'-methoxy-2'-propyl)-anilines and of their chloracetanilides
CN109280012A (en) * 2017-07-19 2019-01-29 山东侨昌化学有限公司 A kind of uninanned platform isopropyl methoxalamine intermediate 2- ethyl -6- methyl-N-(1 '-methoxyl group -2 '-propyl) aniline method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LT3260B (en) 1992-12-29 1995-05-25 Ciba Geigy Ag Process for the preparation of 2-alkyl-6-methyl-n-(1'-methoxy-2'-propyl)-aniline and a process for the preparation of their chloroacetanilides
MD706G2 (en) * 1992-12-29 1998-02-28 Циба-Гейги АГ Process for preparation of 2-alkyl-6-methyl-N-(1'-methoxy-2'-propyl)-anilines and of their chloracetanilides
CN109280012A (en) * 2017-07-19 2019-01-29 山东侨昌化学有限公司 A kind of uninanned platform isopropyl methoxalamine intermediate 2- ethyl -6- methyl-N-(1 '-methoxyl group -2 '-propyl) aniline method

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