Hua
Diethyl Maleate
Tātai Hanganga
Āhuatanga ā-tinana
Te ahua: te wai marama kore tae
Kiato: 1.064 g/mL i te 25 °C (marama)
Ira whakarewa: -10 °C (marama)
Ira kohua: 225 °C (marama)
Kiato ngohe:5.93 (me te hau)
Te pehanga ngohe:1mm Hg (14°C)
Korekore:n20/D 1.441 (marama)
Ira Kohiko: 200°F
Raraunga Haumaru
No nga taonga noa
Waehere ritenga:2917190090
Reiti Whakahoki Taake Kaweake(%)：9%
Taupānga
Ka whakamahia hei takawaenga pesticide mo te whakarite malathion, he pesticide organophosphorus, me te takawaenga mo te rongoa, te hinu kakara me te whakapumau i te kounga o te wai (organic polycarboxylic acid phosphonic acid compound).Ka taea hoki te whakamahi hei whakarewa mo te kapia me te nitrocellulose, te plasticizer, te whakahiato waro, te ngarara, te monomer polymer me te kaiawhina kirihou.
Nga taonga me te pumau
Ka mau i te pāmahana rūma me te pēhanga.Nga matū kua rahuitia: nga mea whakangao, nga mea whakaheke, nga waikawa, nga turanga.Ka taea te tahu, whakarongo ki te puna o te ahi i te wa e whakamahi ana me te penapena.Aukati i te ngohanga o te kohu me te karo i te pa ki te kiri.
Tikanga rokiroki
Rokiroki ki te waahi makariri, maroke me te hau.Kia tupato ki te puna ahi i te wa e whakamahi ana me te penapena.
Tikanga whakahiato
1. He mea hanga na roto i te esterification o te maleic anhydride me te ethanol i te aroaro o te waikawa sulfuric;ka taea hoki te whiwhi ma te whakawhiti whakawhiti me te kapia whakawhiti cation hei whakakorikori.Ko te ihirangi o te diethyl maleate i roto i nga hua ahumahi he ≥98%, a ka pau ia ton o te hua 585kg o te maleic anhydride (95%) me te 604kg o te waihā (95%).
2. Ko te tikanga o te whakarite he mea hanga na roto i te esterification o te maleic anhydride me te ethanol i te aroaro o te waikawa sulfuric.Ko tenei tukanga e rua nga momo o te pehanga hau me te esterification benzene me te pehanga kino kaore he esterification benzene.
(1) Te pehanga hau me te esterification benzene
Taapirihia he momo benzene me te waihano ki roto i te kohua tauhohenga esterification, hoatu ki roto i te maleic anhydride, tāpirihia te waikawa pungatara whakakorikori i raro i te whakakorikori, whakamahana i roto i te mamaoa koti, me te tuku i nga tauhohenga kia uru ki te tauhohenga esterification tata ki te 75 ℃.Ka tangohia te wai i hangaia ma te whakamarumaru azeotropic ternary me te benzene me te waihano, a ko te paparanga o runga o te benzene me te wai waihano ka tukuna ki te kohua hohenga.Mo te 13 ~ 14h i muri mai, ka piki ake te pāmahana o te pourewa whakamarumaru ki te 68.2 ℃, kaore e piki ake te taumata wai o raro o te kaiwehewehe, e tohu ana kua mimiti nga wai katoa i roto i te kohua hohenga, kua oti te tauhohenga esterification.Kati te reflux, haere tonu te whakamarumaru ki te 95-100 ℃, te whakamaarama o te benzene me te waihano.Kia whakamatao ki te 50 ℃, whakanoatia ki te 5% wairewa konutai warowaikawa wai, horoi ki te wai, ka tango i te toenga benzene me te waihano i raro i te korehau kia whiwhi ai i te hua o te waikawa maleic diethyl.
(2) Te pehanga kino kore-benzene esterification
Esterification o maleic anhydride me te waihano i raro i te mahi o te waikawa pungataratia ka mahia i raro i tetahi korehau me te pāmahana ki te whakaputa mai i te waihano me te wai i hangaia e te tauhohenga i roto i te ahua hau, katahi ka wehea te ewaro na roto i te wahanga hautanga ki te reflux te esterification, kia oti te tauhohenga.Ka taea e tenei tikanga te whakapoto i te huringa tauhohenga, te whakapai ake i te hua me te kounga o te hua, te whakapai ake i te taiao whakahaere, te nuinga o nga tipu hanga whare e whakamahi ana i tenei tikanga.
I tua atu, ka taea hoki te whakamahi i te kapia whakawhiti cation hei whakakorikori mo te whakawhiti whakawhiti ki te whakaputa i te waikawa maleic diethyl.
Te tikanga whakamahine: te horoi ki te wairewa pāhare pāporo waro waro, whakamaroke ki te pāhare pāporo pāhare pāporo warowaihā, konutai pūkawa ngāwha ranei me te whakamaroke i raro i te pehanga iti.
