Lihlahisoa
Diethyl Maleate
Foromo ea Sebopeho
Lintho Tsa 'Mele
Ponahalo: metsi a bonaletsang a senang mmala
Boima: 1.064 g/mL ho 25 °C (lit.)
Sebaka se qhibilihang: -10 °C (lit.)
Sebaka se belang: 225 °C (lit.)
Boima ba mouoane: 5.93 (vs moea)
Khatello ea mouoane: 1mm Hg (14°C)
Refractivity:n20/D 1.441 (lit.)
Sebaka sa Flash: 200°F
Lintlha tsa Polokeho
Ke ea thepa e tloaelehileng
Khoutu ea meetlo: 2917190090
Sekhahla sa Puseletso ea Lekhetho la Thepantle(%):9%
Kopo
E sebelisoa e le sebolaea-likokoanyana se mahareng bakeng sa ho lokisa malathion, sebolaea-likokoanyana sa organophosphorus, le se mahareng bakeng sa meriana, litlolo tse nkhang hamonate le boleng ba metsi a stabilizer (organic polycarboxylic acid phosphonic acid compound).E ka boela ea sebelisoa e le solvent bakeng sa resin le nitrocellulose, plasticizer, organic synthesis, chefo e bolaeang likokoanyana, polymer monomer le mothusi oa polasetiki.
Thepa le botsitso
E tsitsitseng mocheso oa kamore le khatello.Lintho tse thibetsoeng: li-oxidizing agents, li-reduction agents, acid, metheo.E ka chesoa, ela hloko mohloli oa mollo ha o sebelisa le ho boloka.Thibela ho inhalation ea mouoane le ho qoba ho kopana le letlalo.
Mokhoa oa ho boloka
Boloka sebakeng se pholileng, se omeletseng le se nang le moea oa moea.Ela hloko mohloli oa mollo ha u sebelisa le ho boloka.
Mokhoa oa ho kopanya
1. E hlahisoa ka esterification ea maleic anhydride le ethanol ka pel'a sulfuric acid;e ka boela ea fumanoa ka phetoho ea phapanyetsano le resin ea cation exchange e le catalyst.Likahare tsa diethyl maleate sehlahisoa sa indasteri ke ≥98%, 'me tone e' ngoe le e 'ngoe ea sehlahisoa e ja 585kg ea maleic anhydride (95%) le 604kg ea ethanol (95%).
2. Mokhoa oa eona oa ho lokisetsa o etsoa haholo-holo ka esterification ea maleic anhydride le ethanol ka pel'a sulfuric acid.Ts'ebetso ena e na le mefuta e 'meli ea khatello ea sepakapaka e nang le benzene esterification le khatello e mpe ntle le benzene esterification.
(1) Khatello ea sepakapaka e nang le benzene esterification
Eketsa tekanyo e itseng ea benzene le ethanol pitseng ea esterification reaction, kenya maleic anhydride, eketsa concentrated sulfuric acid dropwise ha u ntse u fuduhuoa, mocheso ka har'a mouoane o koetsoeng, 'me u etse hore reactants e be esterification reaction ka hoo e ka bang 75℃.Metsi a hlahisoang a tlosoa ke ternary azeotropic distillation ka benzene le ethanol, 'me karolo e ka holimo ea benzene le mokelikeli oa ethanol e khutlisetsoa pitseng ea reaction.Hoo e ka bang 13 ~ 14h hamorao, ha mocheso oa tora ea distillation o nyolohela ho 68.2 ℃, sekhahla sa metsi se ka tlaase ha se sa phahama, se bontšang hore metsi ohle a pitseng ea karabelo a fetohile mouoane, karabelo ea esterification e felile.Emisa reflux, tsoela pele ho hloekisoa ho fihlela ho 95-100 ℃, distillation ea benzene le ethanol.Fola ho isa ho hoo e ka bang 50 ℃, fokotsa ka 5% aqueous sodium carbonate solution, hlatsoa ka metsi ebe u tlosa masala a benzene le ethanol ka vacuum ho fumana sehlahisoa diethyl maleic acid.
(2) Khatello e mpe ea benzene-free esterification
Esterification ea maleic anhydride le ethanol tlas'a ketso ea sulfuric acid e etsoa tlas'a vacuum e itseng le mocheso ho ntša ethanol le metsi a hlahisoang ke karabelo sebakeng sa gaseous, ebe ethanol e aroloa ka karoloana ea karolo ho reflux. the esterification, e le hore karabelo e sekamele ho phethahala.Mokhoa ona o ka khutsufatsa potoloho ea karabelo, ho ntlafatsa chai le boleng ba sehlahisoa, ho ntlafatsa tikoloho ea ts'ebetso, limela tse ngata tsa tlhahiso ea lapeng li sebelisa mokhoa ona.
Ho feta moo, resin ea phapanyetsano ea cation e ka boela ea sebelisoa e le mohloli oa phetoho ea phapanyetsano ho hlahisa diethyl maleic acid.
Mokhoa oa ho hloekisa: ho hlatsoa ka tharollo ea potassium carbonate, ho omisa ka anhydrous potassium carbonate kapa sodium sulfate le distillation tlas'a khatello e fokotsehileng.
