CS268595B1 - Process for preparing 2-chloro-4-ethylano-6-isopropylaine-1,3,5-triazine - Google Patents
Process for preparing 2-chloro-4-ethylano-6-isopropylaine-1,3,5-triazine Download PDFInfo
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Abstract
Riesenie sa týká sposobu přípravy 2-chlór-4-etylanino-6-1zopropylamíno-1,3,5-tr1*z1nu kontinuálnou dvojstupňovou reakeiou kyanúrchloridu s alkylaainal pri teplote 10 C až 50 C v pjvoa reakčnoa stupni a pri teplota 20 C až 80 C v druhou reakčno· stupni, v pritoanosti činidla viažúeeho chlorovodík. V prvoa stupni sa nechá reagovat kyanúrchlorid a 1zopropylaainoa za izoteraickýeh podaienok, oddali sa vodná fáza, organická fáza sa v druhom stupni nechá reagovat s etylaainoa v adiabatickoa režie· a konečný produkt^se z reakčnej zaesi Izoluje znéaya sposobom. Rieáenie je možné využit v cheaickom prieaysle a výsledný produkt v polnohospodirstve.The solution relates to a method for preparing 2-chloro-4-ethylamino-6-isopropylamino-1,3,5-triazine by a continuous two-stage reaction of cyanuric chloride with alkylamine at a temperature of 10 C to 50 C in the first reaction stage and at a temperature of 20 C to 80 C in the second reaction stage, in the presence of a hydrogen chloride binding agent. In the first stage, cyanuric chloride and isopropylamine are reacted under isothermic conditions, the aqueous phase is separated, the organic phase is reacted with ethylamine in the second stage in an adiabatic manner and the final product is isolated from the reaction mixture by the following method. The solution can be used in the chemical industry and the resulting product in agriculture.
Description
CS 268 59S 01 1EN 268 59S 01 1
Vynález se týká sposobu přípravy 2-ehlor-4-etylamíno-6-izopropylam ino-1,3,5-1r1a-zinu kontinuálně dvojstupňovou reakclou kyanurehlorldu s aIkyla«1nm1. Uvedená ztúčeninasa používá v pofnohospodárstve ako herbicidy. Z Uteratůry sú známe rožne spósoby Jeho přípravy. V IT 1586 7 849 je oplsaný spo-tob přípravy 2-chloro-4-etylamíno-6-1zopropy lam 1no-1,3,5-1ri a z 1 nu /atrazlnu/ v jednomalebo v dvoeh trubkových reaktoroch pr1 teplote v prvom stupni 30 až 90 °C a v druhomstupni pr1 teplote - 20 až + 50 °C, v druhom stupni pr1 teplote 10 až 90 °C za přítom-nosti amoniaku ako činidla vlažúceho kyselinu v bezvodom prostředí. V CS 194 827 je oplsaný spósob přípravy 2-chloro-4,6-diaIkylamino-s-tr1a z 1 nov při teplote 90 až 200 °C, tlaku 0,1 až 1,0 HPa v prvom stupni a pr1 teplote 40 až 100 °C,za normálneho tlaku a za 100 X-ného nadbytku příslušného alkylamlnu v druhom stupni. CS 174 107 chrání spósob přípravy reakclou kyanurehlorldu s amonlakom alebo amlnom v zme-s1 vody a organického rozpůštadla člastočne rozpustného vo vodě, vrlaceho pr1 teplote 50až 120 °C, Inertného voí1 reakčným zložkám. Reakcla sa uskutečňuje d1skontlnuálne, adia-batlcky, v rozmedzl - 4 až + 60 C. V CS 163 216 je oplsaný spósob přípravy mono-aIkylamlno-der1vátov-s-triaz1nu aspoňdvojstupňovou reakclou, v prvom stupni prl teptote - 5 až + 60 C, pričom hydroxid alkaHckého kovu vlažúd kyselinu sa do prvého stupňa přidává v množstve až 97 X potřebného množštva a zbytok sa rozdělí do áalšlch reakčných stupňov.The present invention relates to a process for the preparation of 2-chloro-4-ethylamino-6-isopropylamino-1,3,5-1-aza-zine by a continuous two-stage cyanuric chloride reaction. Said compound is used in agriculture as herbicides. Uteratra is known for its methods of preparation. IT 1586 7 849 discloses the preparation of 2-chloro-4-ethylamino-6-1-propylamino-1,3,5-1r1-naphthalene in one or two tube reactors at a temperature in the first stage 30 up to 90 ° C and in the second stage at a temperature of -20 to + 50 ° C, in the second stage at a temperature of 10 to 90 ° C in the presence of ammonia as an acid scavenger in the anhydrous medium. CS 194 827 discloses a process for the preparation of 2-chloro-4,6-dialamino-amino-silane of 1 nov at a temperature of 90 to 200 ° C, a pressure of 0.1 to 1.0 HPa at a first stage and a temperature of 40 to 100 ° C, under normal pressure and 100% excess of the corresponding alkylamin in the second stage. CS 174 107 protects the preparation process by reacting cyanuric chloride with ammonium or amine in water and an organic solvent soluble in water, injecting at 50 to 120 ° C, inert to the reactants. The reaction is carried out on a continuous basis and in a range of 4 to 60 ° C. In CS 163 216, a process for the preparation of mono-alkyl amine derivatives of s-triazine is described at least in the first stage, at a temperature of - 5 to + 60 ° C in the first stage. wherein the alkali metal hydroxide of the lukewarm acid is added to the first stage in an amount of up to 97% of the required amount and the residue is divided into further reaction stages.
Podfa CS 156 446 sa isonó-alkylam1no-der1vát-s-tr1az1nu připravuje adlabatlcky, pri-čom alkylamln a činidlo vlažúce kyselinu sa prldávajú naraz, zmlešané v jednom průde.According to EN 156 446, the isono-alkylaminodioxide-s-triazine is prepared ad libitum, wherein the alkylamine and the acidifying agent are added simultaneously, blended in one pass.
Známe sú aj ňalšie postupy přípravy bez organického rozpůštadla, v prostředí vodyresp. vodného roztoku anorganlckej soli. Všetky uvedené postupy májů určité Specifické nevýhody. Prl sposoboch s použitímorganického rozpůštadla vzniká dvojfázová sústava, pričom vodná fáza z prvej aslnáde saneoddeCuje a v ňalšora postupe představuje jálovů zložku Sůstavy zaprlčiňujúcu energetickéstraty prl ohrlevanl a dopravě; okrem toho, pretože obsahuje chlorid alkalického kovu respchlorid amonný, zvyšuje znečlstenle produktu a vyžaduje dókladnejšle premývanie produktuprl fUtrácíš.Other methods of preparation without organic solvent are also known in the water environment. aqueous inorganic salt solution. All the mentioned Maya procedures have some specific disadvantages. In the process of using an organic solvent, a biphasic system is formed, wherein the aqueous phase of the first and second phases does not separate, and in the next process, the reactive component constitutes a system forcing the energy-loss of the heating and transport; moreover, because it contains alkali metal chloride and ammonium chloride, it increases the product fouling and requires more thorough washing with product.
Spósoby bez použltla organického rozpůštadla májů v dósledku zhoršeného přestupuhmoty a tepla v suspenzlách dlhů reakčnů dobu a výtažok produktu max. 92 X.The methods without the organic solvent of Maya due to the degradation of heat transfer and heat in the reaction time slurries and the product yield of max.
Nevýhodou d1skontlnuálnych sposobov je 1ch zvýšená pracnost a dlhšla celková reak-čná doba, sposobená medzloperačnými manlpuládami s médiemi. . Λ .The disadvantage of continuous methods is the increased workload and the overall reaction time due to inter-operative media fluctuations. . .
Uvedené nedostatky odstraňuje sposob přípravy 2-ehlor-4-etyl-am1no-6-izopropylam1-no-1,3,5-tr1az1nu /atrazlnu/ kontlnuélnou dvojstupňovou reakclou kyanurehlorldu s alkyl-amlnml prl teplote 10 °C až 50 °C v prvom reakčnom stupni a prl teplote 20 °C až 80 °Cv druhom reakčnom stupni, v přítomnosti činidla vlažúceho chlorovodík pódia vynálezu.Podstata vynálezu spočívá v tom, že v prvom stupni sa nechá reagovat kyanůrchlorid s Izo-propylamlnom za 1zotermických podmienok, oddeU sa vodná fáza a organická fáza sa v dru-hou stupni nechá reagovat s etylénamlnom v adlabatickom režime. Konečný produkt sa z reak-čnej zmesl Izoluje známým spósobom - azeotrop1ckou destiláclou sa odstráni organické roz-púštadlo, suspenzia sa odfiltruje a vysuší.The above drawbacks are overcome by the preparation of 2-chloro-4-ethyl-amino-6-isopropylamino-1,3,5-triazine / atrazine / continuous 2-stage cyanuric chloride with an alkyl amine at a temperature of 10 ° C to 50 ° C in the first stage. In the first step, the cyanogen chloride is reacted with isopropylamine under 1-thermic conditions to leave the aqueous phase in an isopropylamine. and the organic phase is reacted with ethyleneamine in the second step in adlabatic mode. The final product is recovered from the reaction mixture by a known method - the organic solvent is removed by azeotropic distillation, the suspension is filtered off and dried.
Sposob přípravy atrazlnu podle vynálezu má oproti predchádzajúc1m sposobom vlacerévýhody.The process for preparing the atrazine according to the invention is advantageous over prior methods.
Xzotermlckým vedením prvého stupna sa obmedzuje rozpůštanie organického rozpůštadlavo vodě, čo sa prl odděleni fáz v dellčke prejavl nižším obsahom rozpůštadla vo vodě,nižšími nákladml na člstenle odpadovej vody a nižšími stratami rozpůštadla. Oddělenímvodnej fázy za prvým stupňoa sa znlžla energetické náklady na dopravu, příkon mlešadlelv aparátoch za dellčkou, znlžla sa nároky na veíkost aparátov, znižl sa celkový obsaTrioU v systéme a tým aj znečlstenle produktu, čo sa prejavl v znlženl nákladov na jeho 2 CS 268 595 Bl preaývanle. Podstatné sa však znlžl spotřeba energie pr1 dest1lác11 organického rozpůi-tadla zo znesl - v sanostatnom adlabatlcky vedenom druhom reakinon «tupni sa teplota zvý-i1 o vyžilu hodnotu ako v postupoeh bez oddelenla vodnej fázy, pretože teplo, ktoré by saspotřebovalo na ohrlatle tejto zložky sa využije na ohrlatle celého systénu a pr1 azeotro-plckej dest1lác11 organického rozpůitadla zo systénu je potřebné dodat Množstvo teplazneniené o teplo potřebné na ohrlatle oddelenej vodnej fázy. Pr1 ponorné vytokej tepelnejkapacitě vody sa jedné o významné položky.First-stage X-ray conduction reduces the dissolution of the organic solvent by water, resulting in a lower solvent content in water, lower costs on the waste water flask and lower solvent losses by separating the phases in the bottom. Separating the aqueous phase after the first stage, the energy cost of transport was reduced, the power consumption of the apparatuses behind the apparatus, the size of the apparatus, the total occupancy of the system, and thus the product contamination were reduced, resulting in a reduction in its cost. preaývanle. However, the energy consumption of the organic solvent was reduced significantly - in the case of a free-flowing second reactor, the temperature was increased by the value as in the process without separation of the aqueous phase, since the heat that would be required for the component it is necessary to supply the amount of heat heat required on the separately separated aqueous phase to the whole system and to the azeotropic distillation of the organic solvent from the system. Pr1 submersible thermal water capacity with one significant item.
Adlabatlcké vedenle druhého stupňa sa taklsto prejavuje energetickými úsporami, pre-tože uvolněné reakčné teplo sa využije na ohřev reakinej znesl a týn aj na destiléciu orga-nického rozpůitadla, Zvýienle teploty v druhon reakinon stupni vedle aj ku zvýienlu reak-inej rýchlostl a k vyiilenu aernénu výkonu reaktora.The second stage of the second stage is manifested by energy savings, since the released heat of reaction is used to heat the reaction, as well as the distillation of the organic solvent, the temperature increase in the second stage, in addition to the increase in reactive velocity and the power output. reactor.
Uvedený přiklad Ilustruje, ale neobnedzuje predaet vynálezu. Přiklad 2-chlór-4-etylan1no-6-1zopropylamlno-1,3,5-tr1az1n bol připravený v laboratórnychnedělových podnlenkach v kontinuálně] Unke, pozostévajůcej z nleianého reaktora pre prvýstupeň, delliky fáz a z nleianého reaktora pre druhý stupeň. Reaktor 1. stupňa bol chlade-ný vodným kůpelon na 20 °C, reaktor 2. stupňa bol zalzolovaný proti stratén tepla.This example illustrates, but does not illustrate, the invention. Example 2-Chloro-4-ethylano-6-isopropylamino-1,3,5-triazine was prepared in laboratory flasks in continuous Unke, consisting of a nleian reactor for the first stage, phase divisions and a Nleian reactor for the second stage. Stage 1 reactor was cooled to 20 ° C with water impeller, and stage 2 reactor was isolated against heat loss.
Po tenperovaného reaktora 1. stupňa sa ierpadlanl dávkovat 17,5 Z-ný roztok kyanúr-chlorldu v toluéne v nnožstve 568 nl/ha zmes 20 Z-ného vodného roztoku 1zopropylan1nu a10 Z-ného NaOH v celkovon nnožstve 331 nlZhZnolový poner NaOH : Izopropylanlnu « 1,01 : 1/.Dávkovanle surovin bolo rladené požladavkou nKC * nXPA ! nETA 1 : 1 * 1After the first stage 1 reactor, 17.5% of a solution of cyanuric chloride in toluene in a quantity of 568 nL / h and a mixture of 20% aqueous 1-propylaniline and 10% of NaOH in a total volume of 331 µl / hl of NaOH: Isopropylanil is added. 1.01: 1 / .The feedstock was quenched with nKC * nXPA! nETA 1: 1 * 1
O nKCZlPA ETAZ " poíat nólov kyanúrehlorldu ./1zopcopylán1n.u,·etylanlnu/ za hodinuAbout nKCZlPA ETAZ "count nano cyanochloride ./1zopcopylan1n.·, ethylene / per hour
Středná zdržná doba znesl v reaktore 1. stupňa bola 60 nlnůt. Zreagovaná znes postupo-vala do delliky fáz, kde sa kontinuálně oddělovala vodná fáza od toluénovej. Z vodnejfázy sa pravidelné odoberall vzorky na stanovenle obsahu toluénu a Izopropylanlnu. Tolu-énová fáza, obsahujúea reakiný nedzlprodukt, přepadala do reaktora druhého stupňa, kan sadávkovala aj zaes 20 Z-ného vodného roztoku etylanlnu s NaOH. Izolovaný reaktoru ohrle-val reakinýn teplon, jeho teplota sa ustálila na cca 60 °C. Doreagovaná reakiná zaes pře-padala do zásobnlka produktu. Vzorky sa odoberall aj z reakinej znesl z posledného reaktora,Izoloval sa z nich produkt oddest1lovanln toluénu vo formě azeotropu toluén - vodaprl cca 80 °C, vodná suspenzfa produktu sa ochladila, produkt sa odfiltroval a vysuill.Stanovil sa v ňon obsah atrazlnu, 2-chlór-4,6-d11zopropyl-an1no-1,3,5-tr1az1nu /propazln/a 2-chlór-4,6-d1etylan1no-1,3,5-tr1az1nu ZsInazInZ.The mean residence time in the first stage reactor was 60 nm. The reacted process proceeded to a phase divide where the aqueous phase was continuously separated from toluene. Samples were taken regularly from the water phase for determination of toluene and isopropylanin content. The toluene phase, containing the reaction product, fell into the second stage reactor, and was also charged with a 20% aqueous solution of ethylene with NaOH. The isolated reactor was heated by the reactor, its temperature stabilized at about 60 ° C. The reacted reaction was transferred to the product cartridge. Samples were taken from the reaction vessel from the last reactor. The product was isolated from toluene-toluene-water-distillated toluene at about 80 ° C, the aqueous product slurry was cooled, the product was filtered off and dried. chloro-4,6-diisopropyl-1,3,5-triazole / propazoline and 2-chloro-4,6-diethylano-1,3,5-triazole-ZsnazInZ.
Prlebeh pokusu a výsledky sů uvedené v nasledujůcej tabuíke.The course of the experiment and the results of the scans shown in the following table.
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