Diethyl Maleate

Gusaba
Ikoreshwa nk'imiti yica udukoko mu rwego rwo gutegura malathion, umuti wica udukoko twitwa organophosifore, hamwe nigihe cyo kuvura, parufe na stabilisateur y’amazi (compound polycarboxylic acide fosifonique acide).Irashobora kandi gukoreshwa nk'umuti wa resin na nitrocellulose, plastiseri, synthesis organique, udukoko twica udukoko, polymer monomer n'umufasha wa plastike.

Ibyiza no gutuza
Ihagaze ku bushyuhe bwicyumba nigitutu.Ibintu bibujijwe: ibikoresho bya okiside, kugabanya ibintu, acide, shingiro.Irashobora gutwikwa, witondere isoko yumuriro mugihe ukoresheje no kubika.Irinde guhumeka umwuka kandi wirinde guhura nuruhu.

Uburyo bwo kubika
Ubike ahantu hakonje, humye kandi uhumeka.Witondere isoko yumuriro mugihe ukoresha no kubika.

Uburyo bwa Synthesis
1. Ikorwa na esterifike ya anhydride yumugabo na Ethanol imbere ya aside sulfurike;irashobora kandi kuboneka muguhana guhinduranya hamwe na cation yo guhana resin nka catalizator.Ibiri muri diethyl maleate mubicuruzwa byinganda ni ≥98%, kandi buri toni yibicuruzwa ikoresha 585 kg ya anhydride yumugabo (95%) na 604 kg ya Ethanol (95%).
2. Uburyo bwo kuyitegura bukorwa cyane cyane na esterifike ya anhydride ya manic na Ethanol imbere ya acide sulfurike.Iyi nzira ifite ubwoko bubiri bwumuvuduko wikirere hamwe na benzene esterification hamwe numuvuduko mubi nta benzene esterification.
(1) Umuvuduko wa Atmospheric hamwe na benzene esterification
Ongeramo umubare munini wa benzene na Ethanol mumasafuriya ya esterification reaction, ushyire muri anhydride yumugabo, ongeramo acide sulfurike yibitonyanga bitonyanga munsi, ushushe unyuze mumaseti ya jacketi, hanyuma utume reaction ziterwa na esterification kuri 75 ℃.Amazi yabyaye akurwaho na ternary azeotropic distillation hamwe na benzene na Ethanol, hanyuma igice cyo hejuru cya benzene na etanol yamazi gisubizwa mumasafuriya.Hafi ya 13 ~ 14h nyuma, iyo ubushyuhe bwumunara wa distillation buzamutse bugera kuri 68.2 ℃, urwego rwo hasi rwamazi rutandukanya ntirukizamuka, byerekana ko amazi yose mumasafuriya ya reaction yahindutse umwuka, reaction ya esterification iba yuzuye.Hagarika guhinduka, komeza gusibanganya kuri 95-100 ℃, gusibanganya benzene na Ethanol.Gira ubukonje bugera kuri 50 ℃, ubangikanye na 5% ya sodium ya karubone ya sodium yo mu mazi, oza n'amazi hanyuma ukureho benzene na Ethanol bisigaye munsi ya vacuum kugirango ubone ibicuruzwa bya acide diethyl.
(2) Umuvuduko mubi benzene idafite esterification
Kurandura anhydride yumugabo na Ethanol mugikorwa cya acide sulfurike ikorwa mugihe cyumubyimba nubushyuhe runaka kugirango isohokane Ethanol namazi yatanzwe nigisubizo muburyo bwa gaze, hanyuma Ethanol itandukanijwe ninkingi yo gucamo ibice kugirango igaruke esterification, kugirango reaction ikunda kuba yuzuye.Ubu buryo bushobora kugabanya uburyo bwo kubyitwaramo neza, kuzamura umusaruro nubwiza bwibicuruzwa, kuzamura ibidukikije bikora, inganda nyinshi zo murugo zikoresha ubu buryo.
Byongeye kandi, cation yo guhinduranya cation irashobora kandi gukoreshwa nkumusemburo wo guhanahana kugirango ubyare aside dietic maleic.
Uburyo bwo gutunganya: gukaraba hamwe na karubone ya potasiyumu ya karubone, kumisha hamwe na karubone ya potasiyumu ya anhydrous cyangwa sodium sulfate no kuyungurura munsi yumuvuduko ukabije.