Alaabta
Diethyl Maleate
Qaab-dhismeedka
Guryaha Jirka
Muuqaal: dareere hufan oo aan midab lahayn
Cufnaanta: 1.064 g/ml at 25 °C (iftiin)
Meesha dhalaalka: -10 °C ( shid)
Barta karkarinta: 225 °C ( shidan)
Cufnaanta uumiga:5.93 (Vs hawada)
Cadaadiska uumiga:1mm Hg (14°C)
Dib-u-celinta: n20/D 1.441 (lit.)
Barta Tooshka ah: 200°F
Xogta Badbaadada
Waxaa iska leh alaabta guud
Koodhka Kastamka: 2917190090
Soo Celinta Canshuurta Dhoofinta (%): 9%
Codsiga
Waxa loo istcimaalay sidii dhexdhexaadiye sunta cayayaanka loogu diyaariyo malathion, sunta cayayaanka organophosphorus, iyo dhexdhexaadiyaha daawada, cadarka iyo xasilinta tayada biyaha (polycarboxylic acid phosphonic acid organic).Waxa kale oo loo isticmaali karaa sida dareere loogu talagalay xabagta iyo nitrocellulose, balaastiigiyaha, synthesis organic, sunta cayayaanka, monomer polymer iyo caawiye caag ah.
Guryaha iyo xasiloonida
Deggan heerkulka qolka iyo cadaadiska.Walxaha mamnuuca ah: wakiilada oksaydhka, wakiilada yaraynta, acids, saldhigyada.Waa la gubi karaa, fiiro gaar ah u yeelo isha dabka marka la isticmaalayo iyo kaydinta.Ka hortag neefsashada uumiga iskana ilaali taabashada maqaarka.
Habka kaydinta
Ku kaydi meel qabow, engegan oo hawo leh.U fiirso isha dabka markaad isticmaalayso oo kaydinayso.
Habka synthesis
1. Waxaa lagu soo saaraa esterification of maleic anhydride iyo ethanol joogitaanka sulfuric acid;Waxa kale oo lagu heli karaa beddelaad beddelaad leh resin sarrifka cation sida kicinta.Maaddada diethyl maleate ee wax soo saarka warshadaha waa ≥98%, iyo tan kasta oo badeecada ah waxay isticmaashaa 585kg oo anhydride maleic ah (95%) iyo 604kg ethanol (95%).
2. Habka diyaarintiisa waxaa inta badan lagu sameeyaa esterification of maleic anhydride iyo ethanol joogitaanka sulfuric acid.Habkani waxa uu leeyahay laba nooc oo cadaadis atmospheric ah oo leh benzene esterification iyo cadaadis taban iyada oo aan benzene esterification.
(1) Cadaadiska atmospheric oo leh esterification benzene
Ku dar qadar go'an oo benzene ah iyo ethanol dheriga falcelinta esterification, ku rid maleic anhydride, ku dar sulfuric acid dropwise hooska walaaqaya, kulayl iyada oo uumi jaakadaysan, oo ka dhig reactants in ay maraan falcelinta esterification qiyaastii 75 ℃.Biyaha la abuuray waxaa lagu soo saaraa ternary azeotropic distillation oo leh benzene iyo ethanol, iyo lakabka sare ee dareeraha benzene iyo ethanol ayaa dib loogu celinayaa dheriga falcelinta.Qiyaastii 13 ~ 14 saacadood ka dib, marka heerkulka munaaradda distillation kor u kaco ilaa 68.2 ℃, kala-soocida heerka hoose ee biyaha hadda ma sii kordhayso, taas oo muujinaysa in dhammaan biyaha dheriga falcelinta la uumi baxay, falcelinta esterification waa dhamaystiran.Jooji dib-u-soo-celinta, sii wad qulqulka ilaa 95-100 ℃, nadiifinta benzene iyo ethanol.Qabooji ilaa 50℃, ku dhex mil 5% aqueous sodium carbonate solution, biyo ku maydh ka dibna ka saar haraaga benzene iyo ethanol hoosta faakuumka si aad u hesho sheyga diethyl maleic acid.
(2) Cadaadis taban oo aan benzene lahayn esterification
Esterification of maleic anhydride iyo ethanol ee hoos falgalka sulfuric acid waxaa lagu fuliyaa hoos maraan gaar ah iyo heerkulka si loo soo saaro ethanol iyo biyaha ay dhaliso falcelinta ee xaalad gaseous ah, ka dibna ethanol waa la kala soocaa iyada oo tiirarka jajabka si ay dib u reflux. esterification-ka, si fal-celintu ay u noqoto mid dhammaystiran.Habkani wuxuu soo gaabin karaa wareegga falcelinta, hagaajinta wax-soo-saarka iyo tayada alaabta, hagaajinta jawiga shaqada, inta badan dhirta wax soo saarka gudaha waxay isticmaalaan habkan.
Intaa waxaa dheer, resin beddelka cation sidoo kale waxaa loo isticmaali karaa kicinta beddelka beddelka si loo soo saaro diethyl maleic acid.
Habka sifaynta: ku dhaqida milanka potassium carbonate, ku qallaji anhydrous potassium carbonate ama sodium sulfate iyo muxaadaro hoos cadaadiska hoos.
