CS234609B1 - A method of purifying 3-methyl-4-nitrophenol and / or its sodium salt - Google Patents
A method of purifying 3-methyl-4-nitrophenol and / or its sodium salt Download PDFInfo
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- CS234609B1 CS234609B1 CS25484A CS25484A CS234609B1 CS 234609 B1 CS234609 B1 CS 234609B1 CS 25484 A CS25484 A CS 25484A CS 25484 A CS25484 A CS 25484A CS 234609 B1 CS234609 B1 CS 234609B1
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Abstract
Vynález sa týká chémie. Vynález rieši čistenie 3 - metyl - 4 - nitrofenol aa/alebo jeho sodnej soli převedením 3 - metyl » 4 - nitrofenolu na 3 - metyl - 4 - nitrofenolát sodný a jeho kryštalzáciou z matečného roztoku. Neutralizácia 3 - metyl - 4 - aitrofenolu sa robí s vodným roztokom hydroxidu a/alebo uhličitanu sodného za vzniku , 15 až 45 % hmat. vodného roztoku alebo suspenzie 3 - metyl - 4 - nitrofenolátu sodného, pričom 3 - metyl - 4 - nitrofenolát sodný vykrystalizuje ochladením, neu tralizácia a kryštalizácia sa robi v přítomnosti polymetafosforeČnanu sodného.The invention relates to chemistry. The invention solves the purification of 3-methyl-4-nitrophenol and/or its sodium salt by converting 3-methyl » 4-nitrophenol into sodium 3-methyl-4-nitrophenolate and its crystallization from the mother solution. Neutralization of 3-methyl-4-aitrophenol is done with an aqueous solution of hydroxide and/or sodium carbonate to produce , 15 to 45% by weight. of an aqueous solution or suspension of sodium 3-methyl-4-nitrophenolate, whereby sodium 3-methyl-4-nitrophenolate crystallizes by cooling, neutralization and crystallization is done in the presence of sodium polymetaphosphate.
Description
234 609234 609
Vynález sa týká výr© by 3 - se tyl - 4 - nitrofenolátu sod-*ného z převedením 3 - metyl - 4 - nitrofenolu na sodnú sol 3 -metyl - 4 « nitrofenolu.BACKGROUND OF THE INVENTION The present invention relates to the preparation of 3-methyl-4-nitrophenolate sodium by converting 3-methyl-4-nitrophenol to sodium 3-methyl-4-nitrophenol.
Ha výrobu prípravkov na ochranu rastlín ako například0,0 - dimetyl - 0 - / 3 - metyl - 4 - nitrofenjřl / tiofosfátua 3 - metyl - 4 - dimetylamínofenyl - 3 - metylkarbonátu sa po-užívá 3 - metyl - 4 - nitrofenol. Z početných sposobov přípravy3 - metyl - 4 - nitrofenolu sa najčastejsie používajú tietosrakcia m-tdbidínu s kyselinou sírovou a dusitanom sodným, pria-ma nitrácia 3 - metylfenolu, hlavně však nitrizácia 3 - metyl -fenolu na 3 · metyl - 4 - nitrofenol s následnou oxidáciou na3 - metyl - 4 - nitrofenol pomocou kyseliny dusičnéj, peroxiduyodíka a iných oxidačných činidiel. Oxidáciou 3 - metyl - 4 -nitrózofenolu kyselinou disičnou na 3 - metyl - 4 - nitrofenolpopisuje ěSSR AO 146 179· Přípravu 3 - metyl - 4 - nitrofenoluv prostředí roztoku minerálněj kyseliny s následnou oxidáciou3 - metyl - 4 - nitrózofenolu kyselinou dusičnou popisuje ČSSRAO 149 726. Podobná přípravu, avšak v prostředí nižších alkoho-loch DOS 2 236 571. Produkt sa vo všetkých troch prípadoch zí-skává jeho vykrystalizováním, filtráciou, premytím a vysušením.Čístenie 3 “ metyl - 4 - nitrofenolu v přítomnosti vodného roz-toku hydrogénsiricitenu sodného alebo draselného popisce Japon-ský patant 21 241 /1964/· Čistěním 3 - metyl - 4 - nitrofanolua jeho sodnej soli kryštalizáciou v přítomnosti sodných solí·minerálnych kyselin sa zaoberá ČSSR AO 147 502 a je podrobné popísané v článku Macko J., Vaňo.J., íulák K., Chem, prum. 29/54č. 8,'408 /1979/. - 2 - 234 6093-methyl-4-nitrophenol is used for the production of plant protection products such as, for example, 0,0-dimethyl-O- (3-methyl-4-nitrophenyl) thiophosphate and 3-methyl-4-dimethylaminophenyl-3-methylcarbonate. Of the numerous processes for the preparation of 3-methyl-4-nitrophenol, the thiososacrations of m-tdbidine with sulfuric acid and sodium nitrite are most commonly used, and the nitration of 3-methylphenol is the most important, but mainly the nitration of 3-methylphenol to 3-methyl-4-nitrophenol followed by oxidation to 3-methyl-4-nitrophenol using nitric acid, peroxide hydrogen and other oxidizing agents. Oxidation of 3 - methyl - 4 - nitrosophenol with disonic acid to 3 - methyl - 4 - nitrophenol describes USSR AO 146 179 · Preparation of 3 - methyl - 4 - nitrophenol in the environment of mineral acid solution followed by oxidation of 3 - methyl - 4 - nitrosophenol with nitric acid. Similar preparation, however, in the environment of the lower alcohols DOS 2,236,571. In all three cases, the product is obtained by crystallization, filtration, washing and drying.Reading of 3 "methyl 4-nitrophenol in the presence of aqueous sodium bisulfite solution or by the purification of the 3 - methyl - 4 - nitrophanol and its sodium salt by crystallization in the presence of sodium salts of mineral acids is dealt with by CSSR AO 147 502 and is described in detail in Macko J., Vano. J., Iulak K., Chem, Prum. 29 / 54č. 8, 408 (1979). - 2 - 234 609
Vo vyššie uvedených literárnych odkazoch sa nevenuje pozornostodstraňovaniu predovšetkým vápenatých a horečnatými solí přítomnýchnečistot, ktore sa vyzrážajú a znečisťujú produkt 3 - metyl -4-nitrofenolát sodný··In the above references, attention is not paid in particular to the elimination of calcium and magnesium salts present in the impurities which precipitate and contaminate the product 3-methyl-4-nitrophenolate sodium.
Vyššie uvedené nedostatky sú odstraněné sposobom šistenia 3 -metyl - 4 - nitrofenolu a/alebo 3 - metyl -*4 - nitrofenolátu sodného, podstata ktorého spočívá v tom, že sa volný 3 - metyl - 4 - ni-trofenol prevedie^na 3 - metyl -4- nitrofenolát sodný pčsobenímhydroxidu a/alebo uhličitanu sodného s výhodou tak, aby vznikol 15až 45 % hmot. roztok, alebo suspenzia 3 - metyl - 4 - nitrofenolátusodného· Teplota je 50 až 105*C. Kryštalizácia 3 - metyl - 4 - ni-trofenolátu sodného prebieha ochladením v přítomnosti najmenej jed-nej anorganickéj soli. Neutralizáoia 3 - metyl - 4 - nitrofenolu anásledovná kryštalizácia 3 - metyl - 4 - nitrofenolátu sodného pre-bieha v přítomnosti pdLymetafosforečnanu sodného.The aforementioned drawbacks are eliminated by the treatment of 3-methyl-4-nitrophenol and / or 3-methyl-4-nitrophenolate sodium, the result being that the free 3-methyl-4-nitrophenol is converted to 3 - sodium methyl-4-nitrophenolate is preferably treated with hydroxide and / or sodium carbonate to provide 15 to 45 wt. solution or suspension of 3-methyl-4-nitrophenol sodium · The temperature is 50 to 105 ° C. Crystallization of 3-methyl-4-nitrophenolate sodium is effected by cooling in the presence of at least one inorganic salt. The neutralization of 3-methyl-4-nitrophenol and subsequent crystallization of sodium 3-methyl-4-nitrophenolate occurs in the presence of sodium disodium metaphosphate.
Postupom podlá vynálezu je možné připravit 3 - metyl - 4 - ni-trofenolát sodný neobsahujúci nerozpustné vápenaté a horečnaté solipredovšetkým uhličitany, hydroxidy a přítomných nečistot sprevádza-júcich technický 3 - metyl - 4 - nitrofenol. Pri áalšom spracovaní3 - metyl - 4 - nitrofenolátu sodného například na 0,0 - dimetyl -0 - /3 - metyl - 4 - nitrofenyl A*tiofosfátu nerozpustné vápenatéa horečnaté soli zneČisťujú produkt a musia sa prácne odstraňovat,čím vznikajú straty, produkt pričom postupom podlá vynálezu sa tomuzabráni. Polymetafosforečnan sodný přejde do matečných lúhov a nez-nečišťuje 3 - metyl - 4 - nitrofenolát sodný. Příklad 1According to the process of the invention, it is possible to prepare sodium 3-methyl-4-nitrophenolate free of insoluble calcium and magnesium salts, in particular carbonates, hydroxides and impurities present in the technical 3-methyl-4-nitrophenol. In the further processing of 3-methyl-4-nitrophenolate sodium, for example, the 0,0-dimethyl-O- / 3-methyl-4-nitrophenyl A * thiophosphate insoluble calcium and magnesium salts contaminate the product and have to be laboriously removed, thereby resulting in losses, product by according to the invention, it is prevented. Sodium polymetaphosphate passes into the mother liquor and does not purify sodium 3 - methyl - 4 - nitrophenolate. Example 1
Do trojhrdlej banky opatrenej miešadlom a teplomerom sa před-ložilo 90 ml vody, v ktorej sá rozpustilo 0,05 polymetafosforečna-nu sodného. K roztoku sa přidalo 36 ml 43»2 % hmot. HaOH, vyhrialsa na 60*0 a postupné za miešania Sa k němu dávkovalo 62,3 g 51,2 %hmot. 3 m«tyl - 4 - nitrofenolu, pričom zvyšok tvořili HgSO^, HNO^,voda a nečistoty. Po přidaní celkového množstva sa zmes vyhrialana 98*0 a miešala 1 hod. Hodnota pH· bola 8,5. Potom sa k reakčnejzmes i přidalo 10 g a zmes sa za miešania ochladila na 20*0.Into a three-necked flask equipped with a stirrer and a thermometer, 90 ml of water was added, in which 0.05 sodium polymetaphosphate was dissolved. To the solution was added 36 mL of 43% wt. HaOH, heated to 60 ° C and 62.3 g of 51.2 wt. 3-methyl-4-nitrophenol, the residue being H 2 SO 4, HNO 4, water and impurities. After addition of the total amount, the mixture was heated to 98 ° C and stirred for 1 hour. The pH value was 8.5. 10 g was then added to the reaction mixture and cooled to 20 ° C with stirring.
Po ochladení sa reakčná zmes nechala stát 4 hod..Zo suspenzie saodstředili kryštálky 3 - metyl - 4 - nitrofenolátu sodného..Výtažok - 3 - 234 609 vzhladom na vložený 3 - metyl - 4 - nitrofenol bol 94,2 %, Získaný 3 - metyl - 4 - nitrofenolát sodný sa rozpustil v des-tilovanej vodě. Roztok neobsahoval nerozpustné vápenaté a ho-rečnaté soli. Příklad 2After cooling, the reaction mixture was allowed to stand for 4 hours. The crystals of 3-methyl-4-nitrophenolate sodium were concentrated from the suspension. The yield of 3 - 234,609 with respect to the 3-methyl-4-nitrophenol was 94.2%, obtained 3 - sodium 4-nitrophenolate was dissolved in distilled water. The solution did not contain insoluble calcium and magnesium salts. Example 2
Postupovalo sa podlá příkladu ls tým rozdielom že přidá-vaný roztok NaOH obsahoval 16,3 % hmot,.HaOH a 2,3 % hmot· RagCO^r * Výtažok vzhladom na 3 - metyl - 4 -nitrofenol bol 94,3 %· t Příklad 3The procedure of Example 1 was followed with the difference that the added NaOH solution contained 16.3% by weight, .alpha.HaOH, and 2.3% by weight. RagCO4R * = 3-methyl-4-nitrophenol was 94.3%. Example 3
Postupovalo sa podlá příkladu 1 s tým rozdielóm, že sa při-dal po neutralizácii 3 - metyl - 4 - nitrofenolu miesto HagCO^ 10 g chloridu sodného. Výťažok vzhladom na 3 - metyl - 4 - nitro-fenol bol 95,6 %·Example 1 was followed with the difference that 10 g of sodium chloride was added instead of 3 - methyl - 4 - nitrophenol instead of HagCO. The yield of 3-methyl-4-nitro-phenol was 95.6%.
Vynález je možné použit v technologickom postupe prípavy3 * metyl - 4 - nitrofenolu alebo 3 - metyl - 4 - nitrofenolátusodného, ktoré sú fiu3 produkty, alebo východními látkami pre vý-robu' roznych látok, predověetkým insekticídov.The invention can be used in the process of preparing methyl 4-nitrophenol or 3-methyl-4-nitrophenol sodium, which are products or Eastern substances for the manufacture of insecticides.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS25484A CS234609B1 (en) | 1984-01-12 | 1984-01-12 | A method of purifying 3-methyl-4-nitrophenol and / or its sodium salt |
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| CS25484A CS234609B1 (en) | 1984-01-12 | 1984-01-12 | A method of purifying 3-methyl-4-nitrophenol and / or its sodium salt |
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| CS234609B1 true CS234609B1 (en) | 1985-04-16 |
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| CS25484A CS234609B1 (en) | 1984-01-12 | 1984-01-12 | A method of purifying 3-methyl-4-nitrophenol and / or its sodium salt |
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1984
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