CS260015B1 - Method of making ftallmld - Google Patents

Abstract

The solution relates to a method for producing phthalimide, used in the synthesis of rubber vulcanization retarders. Phthalimide is produced by reacting phthalic anhydride with urea, which are used in a molar ratio of 1 : 0.5 to 0.7, at a temperature of 95 to 115 °C and a pressure of 2 to 80 kPa. The reaction mass is then heated to 150 to 170 °C to obtain the target product in an amount of 99 to 100%, which has a melting point of 234 to 237 °C and contains not more than 0.5% of acidic impurities and not more than 50% of ammonium salts.

Description

-1- A. OIIHCAHHE H3OBPETEHHH TO ABTOPCKOMY CBHflETEJIBCTBy 3aHBJieHo: 29.06.813aflBKaj Ν »3328304 / 23-04 MKH1: C 07 D 209/48

Abtopm: A.A.Obmhhhhkob, Β.Π.Αυαηη, B.B.Kohob, M.M.PanonopT, Β.Η.ΧπμΟοβ, B.B.flaBHTyjiHaHH, B.H.rópCyHOB, E.C.MaKaposa 3aHBHTeni>: HayuHo-HccnenoBaTeJii »CKHft ηηοτητυτ χημηκθτοβ ππη ποπΗΜβρΜΜχ Μβτβ-pnajiOB (HHHXHMnOJIHMEP)

HaaBaHHe Η3θ6ρβτβΗΗπ: CIIOCOB ΠΟΠΥΗΕΗΗΒ ΦΤΑΠΗΜΗΑΑ Η3θ6ρβΤβΗΗδ OTHOCHTCB Κ yCOBepmeHCTBOBaHHOMy cnocoey nonyneHHH φΤβΗΗΜΗΑβ, mHpoKo HcnojiBsyeMoro b XHMunecKoft npoMbimneHHocTH b xanecTBe npoMesyroBHoronpoflyKTa Rip cHHTe3e saMenroiTejieft noAByjiKaHHaamní xaynyKOB H B-φβρΜβηβΒΤΗ qecKoň npóMbnnneHHocTH np "CHHTese aaahhh.

KsBecTeH cnocoG nonyaeHHa φτβηκΜΗΑβ BsauMOAeftcTBHeM 1 hojíš φτβπβΒοΑ khcť · JIOA hjih ee 3ηγηαρηαβ c 0.5-2 mojihmh (c πρβΑηοΗτκτεπΒΗΟ 0.75-1 money) xapGa-; IMFF NPH TewnepaType 130-230 DEG C. b cpefle apoMaTHaecxoro pacTBopHTeaa, ογρΒηη-aeHHo pacTBOpawmero IrByByw xacnoTy h eHhflpufl, ho He pacTBOparomero xap-> 6aMH «. UeaeBoft nponyKT BbweaajoT hs eyeneHSHH ιχβΗτρΗφνΓκροΒβΗΗβΜ, ocaaox προ-'MUBaioT ot pacTBopHTejia boao # h cymaT. Buxoai φτβπΗΜΗΒβ cocTaBJíaeT 90-96X otTeopHH, TeMnepaTypa naaBneHHa panna 232-235’C (1).

AND

HeptocTaTKOM yxa3aHHoro cnocoCa aBaaeTča ΗΟπαπΜΟΒβΗΗβ tokchbhmx h noaca-pOOnaCHUX paCTBOpHTeaeA, HeoGxOAHMOCTb φΗΠΙ> ΤΡ0ΒβΗΗΗ eyeneHSHH, npOMWBKH HcymxH ocaflKa, pereHepaimn pacTBOpHTena, ηηπηηηθ 3HaHHTenbHoro xonnaecTBactokhmx boa, 3arpH3HeHHhix pacTBOpHTeaeM.

HanConee Ďjihskhm to npeAnoxeHHOMy cnocoCy no TexHHaecxoň cynpiocTH h aocth-raeMOMy peayjibTaTy asaaeTca cnocoG nonyaeHna Φτβπημηαβ BsaHMOAeňcTBHeM φτβ-nesoro aHrHApHAa c xapfíaMHAoM πρη "μοπβηομ οοοτηοπιθηηη 1: 0.8 πρκ TeMnepaType150-170 ° C (2). .....__ 260015 . 2- 06pa3OBaBUieecH b pe3ynbTaTe peaKflnn TBepfloe BemecTBO cycneHflnpyioT b κηπη-Men BOfle (J) * HjibTpyroT npoMbreaioT BOfloň η οτ3κημ3ιοτ, Bbixofl cocTaBJíneT 91.5% bnepecneTe Ha 3arpyxeHHbiň φτβηεΒΜή aHrnflpnfl. TeMnepaTypa nnaBneHHH fleneBoronpoflyKTa 232-237 ^ 0. K HeflocraTKaM oriHcaHHoro cnoco6a othochtch HeynpaBnneMocTb TexHonornnec-Koro npoflecca,, ero noBbnneHHan onacHocTb BcneflcTBne BcneHHBaHHH η βο3μομηογοBbiGpoca HarpeToň «170 ° C peaKflnoHHoň Maccbi H3 peaKTopa, nonyneHne npOMewy-TOHHoro npoflyKTa b BHfle TBepfloň πθηη η ηθο6χοαημοοτβ pa3pynieHHH yKasaHHoňneHbl BOfloň (npn 3TOM BO3MO» eH BblĎpoC KHnHmeň BOflbl H pea KflHOHHbIX Γ33ΟΒ H3annapaTa), Hannnne cTaflnn Φηλβτροβηηηη h otmmbkh fleneBoro npoflyKTa ot conen, HeflocTaTOMHO Bbicoxnn Bbixofl. flpyrnM HeflocTaTKOM HBnneTCH arnoMepnpoBaHne fle-neBoro npoflyKTa BcneflcTBne cneKaHnn peaKflnoHHoM Maccbi n HenonHoro ee pa3py-raeHHH npn κηπηηθηηη c βοαοη. KpoMe Tóro, fleneBoň npóflyKT coflepwnT 4-7% boaw.

Uejibio Η3θ6ρετβΗΗΗ HBJíHeTCH ynpomeHn npoflecca, noBbnnnBbixofla n Kane-cTBa fleneBoro npoflyKTa. IIocTaBneHHaH flenb flocTHraeTCH onncbiBaeMbiM cnocoSoM nonyneHHH φτ3ηηΜΗΑ3, KOTopbiřt 3aKJHonaeTCH b that HTO «JrrajiHMHfl noflBepraioT B3anMoneňcTBHK) c-Kap6a MHflOM NPN nx MonbHOM cooTHomeHHH 1: 0.5-0.7 NPN TeMnepaType 95 to 115 ° C n-PO3 ρΗΜβΗΗΗ 0.02 -0.8 aTM c nocneflywmnM HarpeBOM nonyqeHHoň peaKflnoHHoň Maccwflo 150-170 ° C. HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH. c nocneflyromnM HarpeBOM peaKflnoHHonMaccu flo 15O-17O ° C. Πο cnocoOy b CMecnTenb C AET-o6pa3HbiMH jionacTHMH 3arpy «araT φτβηβΒΜή H-mflpnfl n KapBaMHfl b MonbHOM coothoiuehhh 1: 0.5-0.7, npeflnoHTHTejibHo 1: 0.6, repMeTH3HpymT CMecnTenb, οοθαηηηιοτ ero NEP npHMoň xonoflnnbHHK πρηθμηηκpeaKflnoHHoň eoflbí η c BACKGROUND OF THE INVENTION 0.02-0.8 aTM nHarpeeaioT coflepacnMoNnPnEnEnEnEnEnHEnEnCoCoCoBeCoMeCoBeCoBeCoMeTeNToNToRoCoMeTyoNoNToNo. Κθ9φφΗΑΗβΗΤ 3arpy3Kn CMecnTenn πρηηημβιοτ ραβημμ 0,6-0,7. Πρη aocth-χβΗΗΗ B peaKflnoHHo Mac Macce TeMnepaTypbi 95 ° HannHaeTCH nnaBneHne peaKflnoHHoonMaccu, κοτοροβ aaKaHMHBaeTcn npn TeMnepaType 110-115 ° C. Πρη flanbHeňmeM Ha-rpeBe ot 110–115 ** C flo 125-130 ° C nonyneHHbiň nnae pa3naraeTCH c Bbifle-neHneMyrneKncnoro ra3a n o6pa3OBaHneM npoMeacyTOHHMx αμμοηηηημχ coneň φτβηεΒοηKHcnoTbi. B yKa3aHHOM HHTepBane TeMnepa Type npoflecc HfleT 6e3 BbifleneHHH Tennan conpoBoxtflaeTCH Φ33οημμ nepexoflOM: nnae npeepamaeTCH b TBepflbi KpynHOKpnc-TannHHecKHn npóflyKT. Πρη flocTmceHnn TeMnepaTypbi 125-130 HannHaeTCH npoflěcco6pa3OBaHHH ^ TanHMHfla, conpoBoacflaiomHňcH BUfleneHneM Tenjia n peaKflnoHHoň BOflbl.TeMnepaTypa peaKflnoHHoň MACC npn caMonpon3BonbHo BO3pacTaeT flo one hundred meters from 150 to 160 ° C, Sate SucTpo cHnacaeTCH Ha 5-1O ° C. PeaKflnoHHaH Macca b stot μομθητnpeflCTaBJiHeT cyxo Μβηκοκρηετβηηηηεοκηή Φτηηημηα c BKJnofleHneM oTflenbHbixKpynHbix KpncTannoB andMMOHnnHbix conen. Macy noflorpeBaioT flo 150-170 ° 0, bh-flepjKHBaioT npn yKa3aNoM TeMnepaType 10-60 MHHyT flo ποπηογο pa3jio »eHHH 3mmo — HnnHbix conen, oxnastflaioT flo κομηατηοΑ TeMnepaTypu n BurpyxaioT. C bhxoaom 99-100% nonynawT nopoinKoo6pa3Hbn MnkKpncTannnnecKHn o6e3BoaceHHbn npóflyKT, MMetontn TeMnepa nnaBneHHH 234-237 ° C, coRepacamn He 6onee 0.5% khcjimxnpHMeceftj He 6onee 0.5% aMMOHnnHbix conen. ΠρηΜβρ 1. B CMecnTenb Tnna1 ΒερΗβρ-Πφηβήηερβρ eMKoeTbio 1.5 n 3arpyxaioT 444.36. r (3 μοπλ) φτβηβΒΟΓΟ and HrnflpHfla n 90,09 r (1,5 moah) KapGaMHfla (Monbnoe coothohne κομποηθητοβ 1: 0,5). CMecnTenb cHf166H3eT-o6pa3HbiMn nonacTHMH; Ilocne 3arp3KH peareHTOB CMecHTenb repMe-THSHpyioT, ycTaHaBJWBaioT b hcm paspasenne b 0,02-0,1 aTM h npn nepeMeuiHBa-hhh HarpeBaioT CMecb co ckopoctbio 1-3 ° C b MHHyTy. Lime flocrrateHUH TeMnepaTypw95 ° C CMecb naunHaeT nnaBHTbCH, njiaBJieHHe aaKaHHHBaeTCH πρκ TeMnepaType 11Ο-Ι 15 ° C. nonyyeHHbiNjiaB HarpeBaioT no TeMnepaTypw 150 ° C h BbiflepjKHBawT πρκ yKa-saHHoon TeMnepaType. 60 MHHyT. Πο οκοηηηηηη BwnepxKH nonyneHHbi nponyKT npnnepeMemnBaHHH oxjiaxnatoT flo KOMHaTHoň TeMnepaTypw. IIonynaJOT 439.1 r MejiKOKpHCTajijnwecKoro nopomKa, HMeromero TeMnepaTypynnaBneHHH 234-235 ° C. Bbixofl cocTaBnaeT 99.5% ot TeopHH, conepmaHHe BobecTBa - 97%, Kncjibix npHMecene - 0.33%, andMMOHHNHMX conen - 0.41%. ΠρΗΜβρ 2. B CMecHTeJib, HarpeTbien no 60-90 ° C, aarpyacaroT 444,36 r (3 mojih) $ TaneBoroaHrHflpnna h 108,1 r (1,8 mojih) KapGaMHna (MOJibHoe cooTHomeHHe 4> TaneBbi aH-rnfi! Kap6aMna paBHo 1 : 0.6). 95–115 ° C CMecb pacnnaBnneTCH, npnyneHHbiň nnaB HarpeBaioT no160 ° C h BbmepxHBaioT npn s ro TeMnepaType 20-30 MHHyT. Πο οκοηηβηηη BbmepmKHpeaKUHoHHyio Maccy oxnamnaioT npn nepeMeniHBaHHH ro κομηθτηοΗ TeMnepaTypbi h bw-nepxHBawT H3 cMecHTenn. nonywawT 440.4 r MenKOKpHCTaJinHcNoCoNcOn, HMeromero TeMnepaTypynnaBneHHH 236-237 ° C. Bbixon cocTaBJinT 99.8% οτ τθορηη, conepsaHne ochobhotoBemecTBa 97.4%, andMMOHHnHMX conen - 0.15, KHCJiwe. npHMecn OTcyTCTByroT. Π CMΗΜρρ B B B B Bbiň ro B B B B B B B B B B B B C Barpy B,1,1,1,1,1,3,1,1,1 3 moj,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1 ,1 , repMeTHanpyioT CMecHTejib ,. coanaioT B HeM paspameHne 0.02-0.1 aTM nsMeHBHHHHH HarpeBaioT CMecb co ckopoctbio 1-3 ° C b MHHyTy, npH 95-115 CCMecb pacnjiasnHeTCH, nonyneHHbn nnaB HarpeBaioT no 170 ° C h BbinepxHBaroT npn '3Ton TeMnepaType 10-15 MHHyT . Πο oKoímaHHn Bbinep K KH peaKpHOHHyro Maccy ox-naJsnaioT πρκ nepeMeinHBaHHH ro κομηητηοΗ TeMnepaTypw h BwrpyacaroT. m.p. 439.1 m of MenKOKpHCTannimecrOcOn, HMeromero TeMnepaTypynnaBneHHH 235-236 ° C. Bbixon cocTaBnneT 99.5% στ TeopHH, coftepmaHHe ochobhotro BemecTBa - 97.3%, con ο eň 0.21%, KHCJiwé npHMecn OTcyTCTByroT. ΠρΗΜβρ fourth _____ _ B CMeCHTejIb eMKOCTbIO 50 JI CHaSweHHblň ΠρΗΜΜΜ XOJIOflHJIbHHKOM, NPH -eMHHKOM peaKUHOHHoň Boflbí h coenHHeHHbift Cz BaKyyMHoň cncTeMoň, sarpymaroT22 κγ (0.1485 mojih) ifcTaneBoro aHrHflpHna κγ 5.35 h (0.089 μοπη) KapCaMHfla (μοπϊ BH θ BH BH BH BH BH BH BH BH BH BH BH BH BH BH BH BH BH 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 pe pe pe pe pe pe pe cy cy T T T T ° C. M η asa ň M M M M M M M M M M M -30 -30 -30 -30 -30 -30 -30 -30 -30 -30 -30 pe pe pe pe pe pe pe pe pe pe pe pe -20 -20 -20 -20 -20 -20 -20 -20 -20 -20 -20 -20 -20 -20. TeMnepaTypbi 110-130 ° C npopecc conpoBompaeTCH BwpeneHHeM yrne-KHCJioro rasa. Πρη flocTHmeHHH b peaKHHOHHoň MACC TeMnepaTypw 125-130 CnpexpamaioT nopany TennoHocHTenn b pySaraxy CMecHTenn, TeMnepaTypa peaKijH-ohhoh Maccbi πρκ 3ToM 3a MHHyT noBbímaeTCH ro 15-20% to 155-156 CNET Bwňena-romerocH peaKpHOHHoro Tenna Πρκ TéMnepaType 135-14O C HanHHaeTCH BbifleneHHeBOflbl Η36ΗΤΟΗΗΟΓΟ ΠρΟΤΗΒ ΟΤβΧΗΟΜβΤρΗΗββΚΟΡΟ KOJIHHeCTBa 3ΜΜΗΒΚ3. ΠρΗ flOCTH-ικβΗΗΗ yKaaaHHoft TeMnepaTypw b GHcTeMe ycTaHaBHHBaroT pa3pexeHHe b 0.7-0.8 aTM.BbinenfeomHecn NAPW boaw KOHfleHCHpyroT xonoflHnbHHKe b h b coOHparoT πρπβΜΗΗκ, ra3.oo6pa3Hbie npoflyKTw peaxflHH ynasnHBaioT b BOflHHoň notfymKe. , Πρκ flocTHmeHHHb peáKflHOHHoň TeMnepaTypw 155-156 ° C, b pyCanuty CMecHTena noflaioT τεπηο- 260015

HocHTenb, HarpeBatoT Maccy no 160-165 ° C h Bbinep »HBaioT npn yKa3aHHoBoMeepa-Type 30 MHHyT, Πο OKOHxaHHH BbinepxKH peaKUHOHHyro Maccy oxjiaxnaroT no κομηητ — Them TeMfiepaTypbi h BbirpyxaioT. riojiynaioT 21.9 κγ MenKOKpHCTajuiHnecKoro noponixa, HMeOqero TeMnepaTypynjiaBjieHHH 235.5-237 ° C, conepxamero 97.5 µm and BemecTBa, 0.1% KHCJibixnpuMeceň h 0.42% aMOHOHHbix conen. Bbixon cocTaBJiaeT 99.5% οτ TeopHH. ΠρΗΜβρ 5. * B CMecHTejih eMKocTbio 1.5 ji, HarpeTbien no 60-90 ° C, 3arpyxaioT 444.36 r (3 Mojin) flwajieBoro aHrHnpuna h 108.1 r (.1.8 mojih) KapSaMuna (MOJibHoe coot-HonieHHe $ HbHnpHn: Kap6aMHn paBHo 1: 0.6), repMeTH3npyioT cMecHTenb, yaTaBaIHBaioTb ηθμ pa3pexeHHe 0.8 aTM η npn nepeMeuiHBaHHH HarpeBaroT coCKopqcTbK) 1-3 ° C b MHHyTy. 95-115 ° C CMecb pacnjiaBJiaeTCH. nojiyneHHbnnjiaB HarpeBaroT no 160 ° C h BbinepxHBaroT npn stack TeMnepaType 20 MHHyT. Πο okoh-naHHH BbmepacKH peaKnHOHHyro Maccy oxjiaxnaioT no KOMHaTHoň TeMnepaTypbi h bm-rpyxaroT. HaloHH 2 236-237 ° C, conepxamero 98.1% by weight of BemecTBa, 0.05% khcjimxnpn-Mecen, IIpHMecb andMMOHHnOncTyTCTByeT, Bbixon cocTasnaeT 98.8% rt,

Takhte o6pa3OM, onHCbiBaeMbiň cnoco6 HMeeT PNN npenMymecTB Nepen H3BecTHbiM a) OnucbiBaeMbiň nponecc 3HawHTeJibHo nponje b ηθμ oTcyTCTByioT CTAN ^ n c? NeHnHpOBaHHH peajCIÍHOHHoň MaCCbl B Bone <!> HJIbTpOBaHHH CycneH3HH, npOMbIBKHocanKaj 6) Ilponecc jierKo ynpaBJíaeM HB npoMbinuieHHbix ycnoBHHx μοχθτ 6μτβ ocymecT -BJieH well 3anaHHoň nporpaMMe, Tax xak nponecc coctoht H3 τρεχ nocjienoBaTeiib-Hbix CTannň (nojiynefine ββτθκτηκη, pa3JioxeHHe ββτθκτηκη well aMMOHHňHoň cojih, TepMoo6pa6oTKa cojih well npeBpameHHH φτεηΗΜκη bo ee) Kaxnaa H3 κοτορωχ jihmh-THpyeTCH TOJibKo TeMnepaTypoň peaKnnoHHoň Maccw η μοχθτ 6biTb no xenaHHio 3a-MenJieHa hjih ycKopeHa, Πο HSBecTHoft TexHonorHH nponecc npaKTiwecKH HeynpaBJinM, tbk xax nocjiepacnnaBJieHHH peareHTOB ρββκηκη προτεκβετ oneHb 6ypHo h 3aKaHHHBaeTCH b τε-ΗβΗΗβ HeCKOJIbKHX MHHyT. b) B onncbiBaeMOM cnocoSe OTcyTCTByeT BcneHHBHHHe peaKUHOHHoň Maccbi, hnoBTOMy OH 3HaHHTenbHo 6e3onacHee, neM HSBecTHbiň. Πο toh xe npHHHHe naHHbiňcnoco6 nosBOJiseT yBejnwHTb κοΘφφκηΗβΗΤ 3arpy3KH peaxTopa b 4-4.5 Mr. OTCyTCTBHe ΒΟΠβΗΗΒΗΗΗΗ oSbHCHHeTCH CnOKOňHblM, nOCTanHHHbíM πρΟΤΘΚΗΗΗβΜnponecca »pacTHHyTOCTbio ra30BbinejieHHfl bo speMeHH, OTcyTCTBHeM nonojiHHTenb-Hbnt- TenjioBbineneHHH (TénnoBoro οφφεκτε peaKnHH) NPN nepexone οτ χιιηκοή Sb-K ΤβΚΤΗΚΗ TBepnoň aMMOHHňHoň COJIH. Πο H3BeCTHOŮ TeXHOJIOrHH BCe peaKnHOHHbiera3bi (yrneKHCJibi ra3, napbi Bonn, HenpopearHpoBaBmHn andMMHax) BbinejunoTCH bTeneHHe HecKonbKHX MHHyT. B TeneHHe τβχ xe MHHyT BbinejiHeTCH Bce peaKnHOHHoeTenno, and peaKnHoHHan Macca HaxonTCH h b stot μομθητ b χκηκοΜ, pacnJiaBJíeHHOMBHne. r) Cnoco6 o6ecnenHBaeT noBbnneHHe Bbixona Ha 8-9%, HecKOJibxo 6onee BbicoKyioTeMnepaTypes nnaBJíeHHH, nojiHoe OTcyŤcTBHe bobh.b nenoM nponyKTe. n) flaHHbift cnoco6, b ο η η 3 ot 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 p p p p p p p p p p p p p p p p p p H H H. MacniTaSa peaieropa. OTcyTCTBHe arnoMepaTa o6ecnenHBaeTCH c onwoňCTopoHM, ycjioBHHMH noJiyneHHH nponyKTa (oTcyTCTBHeM TBepnoň, cneKiueňCH πθημ, noJiyneHHeM φτΒΐίΗΜΗηε nepes Mr npoMexyTOHHbix. NponyKTOB) and c ^ npyroň CTopo- HBI, τθμ, ητο Hcnojib3yeMbie B KanecTBe peaKTopa cMecHTenu ηβηςποτοη χοροιπημηnncnepraTopaMH η ωκροκο πρημθηηιοτοη b npoMbnnneHHocTH ρ, ππ pa3MOJa pa3JiHHHbixMaTepHajioB. 260,015 '-5- ΦΟΡΜΥΛΑ Η3ΟΒΡΕΤΕΗΗΛ ϋποςοβ nonyqeHHH Φτ &amp; πημηαβ B3anMoneňcTBneM φτ &amp; πβΒΟΓο anrHflpHfla c KapĎaMH-Flom NPH HarpeBaHHH, oTjnrqaromtoftcH τβΜ, UTOrc uenbio ynponjeHHH nponecca, ποβμ-meHHH Bbrxofla h káMecTBa neneBoró nponyKTa, BsaHMofteftcTBHe φταπβΒΟΓο βηγημρη-Fla c KapOaMHfloM ocyjqecTBnnioT npn mojibhom cooTHomeHHH HáaBaHHWx peareHTOB1: 0.5-0.7, TeMnepaType 95-115 ° C h paapaxeHHH 0.02-0.8 htm, and oCpasyromyiocHpeaKixtfoHHyro Maccy 3βτεΜ HarpeBawT no TCMnepaTypes 150-170 ° C. HCTOUHHKH ΗΗφορΜβίρΐΗ, ΠρΗΗΛΤΜε BO BHHMaHHe NPH 3KCnepTH3e 1. US, A, Η · 3819648th second Οτπετ BHHHXC3P 1977 (MocKBa "ΟκβΒβΗΗε TexHHqecKoň noMonjH npn nycxeΗ 0CB08HHH OCHOBHNX npOH3BOflCTB (npOHSBOffCTBO φτβίΐοφοεε)"), C 70 Ρ Ε II Ε Ρ A Τ CIIOCOB ΠΟΠΥΉΕΗΜΗ ΦΤΑΙΒΜΗΒΑ ΗΒοδρετεΗκε othochtch κ cnocoOy nonyMeHHH φτβπΗΜΗηβ, HcnonbsyeMoro πρκcHHTeae aaMennHTenen noABynKaHHsanmi KayqyxOB. nonyqeHHe φτβπκΜΗηβ ετβηεΒΟΓΟ anrHflpH-6a c KapOaMHflOM, KOTopue Óepyr b MOJibHOM cooTHomeHHH 1: 0,5-0,7, πρκ TeMne-paType 95-115 ° C η paapaxeHHH 0,02-0,8 htm. O6pasy »myioca npn stem peaKUHOHHywMaccy aaTeM HarpeeaioT no 150-170 ° C c nonynetmeM neneBoro nponyKTa c BbixonoM99-100%, HMeniuero TeMnepaNnaBneHHa 234-237 ° C, conepatamero He 6onee0,5% khcjimx npHMeceň h 6e6e 50% 8μμοηηΛηνχ coneft. IIpHSHaHO Η3ο6ρετεΗΗεΜ no peaynbTaTaM 3KcnepTH9N, ocymecTBJíeHHoTocynapcT-BeHHUM ΚοΜΗΤβΤΟΜ CCCP ΠΟ nenM H3o6peTeHHfl H OTKpUTHft. 260015

Claims (1)

DESCRIPTION OF THE INVENTION A process for the preparation of phthalimide by the interaction of phthalanhydride with urea with heating, wherein the reaction of phthalimide with urea is carried out at a molar ratio of said agents of 1: 0.5 to 0.7, a temperature of 95 to 115 ° C and a pressure of 2. the reaction mass is then heated to 150-170 ° C. 260015