Ngwaahịa
Diethyl Maleate
Usoro nhazi
Njirimara anụ ahụ
Ọdịdị: mmiri mmiri transperent enweghị agba
Njupụta: 1.064 g/mL na 25 Celsius C (ọkụ.)
Ebe mgbaze: -10 Celsius (ọkụ)
Ebe a na-esi esi: 225C (ọkụ)
Njupụta uzuoku: 5.93 (vs ikuku)
Nrụgide ikuku: 1mm Hg (14°C)
Ntụgharị: n20/D 1.441 (ọkụ.)
Ebe ọkụ: 200°F
Data nchekwa
Ọ bụ nke ngwaahịa nkịtị
Koodu mpaghara:: 2917190090
Ọnụego nkwụghachi ụtụ nke mbupu (%): 9%
Ngwa
A na-eji ya dị ka pesticide intermediate maka ịkwadebe malathion, pesticide organophosphorus, na onye na-ahụ maka ọgwụ, senti na mmiri dị mma stabilizer (organic polycarboxylic acid phosphonic acid compound).Enwere ike iji ya dị ka ihe mgbaze maka resin na nitrocellulose, plasticizer, organic synthesis, insecticide, polymer monomer and plastic assistant.
Ngwongwo na nkwụsi ike
Kwụsie ike na ụlọ okpomọkụ na nrụgide.Ihe ndị a machibidoro iwu: ndị na-emepụta ihe na-emepụta ihe, ndị na-ebelata ihe, acid, bases.Enwere ike ịgba ọkụ, ṅaa ntị na isi iyi ọkụ mgbe ị na-eji na ịchekwa.Gbochie ikuku ume nke vapors ma zere kọntaktị na akpụkpọ ahụ.
Usoro nchekwa
Chekwaa n'ebe dị jụụ, kpọrọ nkụ na ikuku.Lezienụ anya na isi iyi ọkụ mgbe ị na-eji na ịchekwa.
Usoro synthesis
1. A na-emepụta ya site na esterification nke maleic anhydride na ethanol na ọnụnọ nke sulfuric acid;Enwere ike nweta ya site na ngbanwe mgbanwe na resin mgbanwe cation dị ka ihe na-eme ka ọ bụrụ ihe na-akpata.Ọdịnaya nke diethyl maleate na ngwaahịa ụlọ ọrụ bụ ≥98%, na tọn ngwaahịa ọ bụla na-eri 585kg nke maleic anhydride (95%) na 604kg nke ethanol (95%).
2. Usoro nkwadebe ya bụ nke a na-eme site na esterification nke maleic anhydride na ethanol na ọnụnọ sulfuric acid.Usoro a nwere ụdị abụọ nke ikuku ikuku na benzene esterification na nrụgide na-adịghị mma na-enweghị benzene esterification.
(1) Nrụgide ikuku na benzene esterification
Tinye obere benzene na ethanol n'ime ite mmeghachi omume esterification, tinye na maleic anhydride, tinye sulfuric acid siri ike n'okpuru mkpali, kpoo ọkụ site na uzuoku jaket, ma mee ka ndị na-emegharị ahụ nweta mmeghachi omume esterification n'ihe dịka 75 ℃.A na-ewepụ mmiri a na-emepụta site na ternary azeotropic distillation na benzene na ethanol, na akwa oyi akwa nke benzene na ethanol mmiri na-agbanyeghachi na ite mmeghachi omume.Banyere 13 ~ 14h mgbe e mesịrị, mgbe distillation ụlọ elu okpomọkụ adahade 68.2 ℃, na separator ala mmiri larịị bụ agaghịkwa ebili, na-egosi na niile mmiri na mmeghachi omume ite e evaporated, esterification mmeghachi omume zuru ezu.Kwụsị reflux, gaa n'ihu na distillation ruo 95-100 ℃, distillation nke benzene na ethanol.Jụụ ruo ihe dị ka 50 ℃, wepụ ya na 5% aqueous sodium carbonate solution, jiri mmiri saa mmiri wee wepụ benzene na ethanol fọdụrụnụ n'okpuru oghere iji nweta ngwaahịa diethyl maleic acid.
(2) Nrụgide na-adịghị mma benzene na-enweghị esterification
Esterification nke maleic anhydride na ethanol n'okpuru omume nke sulfuric acid a na-rụrụ n'okpuru a ụfọdụ agụụ na okpomọkụ iji wepụta ethanol na mmiri nke mmeghachi omume na a gaseous steeti, na mgbe ahụ ethanol kewapụrụ site fractionation kọlụm reflux. esterification, nke mere na mmeghachi omume na-emekarị ka ọ bụrụ nke zuru oke.Usoro a nwere ike belata usoro mmeghachi omume, meziwanye mkpụrụ na ngwaahịa ngwaahịa, melite gburugburu ebe ọrụ, ọtụtụ ụlọ mmepụta ihe na-eji usoro a.
Tụkwasị na nke a, a pụkwara iji resin mgbanwe cation mee ihe dị ka ihe na-eme ka mgbanwe mgbanwe na-emepụta diethyl maleic acid.
Usoro nnụcha: ịsacha ya na ngwọta potassium carbonate dilute, ihicha na potassium carbonate anhydrous ma ọ bụ sodium sulfate na distillation n'okpuru nrụgide belatara.
