o Osunwon China Diethyl Maleate Olupese Olupese Olupese ati Olupese |LonGoChem
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Awọn ọja

Diethyl Maleate

Apejuwe kukuru:

Orukọ: Diethyl maleate
Orukọ apeso: Diethyl maleate;Diethyl malate;Ethyl malate ti o gbẹ
Nọmba CAS: 141-05-9
Nọmba iwọle EINECS: 205-451-9
Ilana molikula: C8H12O4
Iwọn molikula: 172.18


Alaye ọja

ọja Tags

Ilana Ilana

14

Ti ara Properties
Irisi: omi ti ko ni awọ
iwuwo: 1.064 g/mL ni 25 °C (tan.)
Aaye yo: -10 °C (tan.)
Oju ibi sise: 225°C (tan.)
Iwuwo oru: 5.93 (la afẹfẹ)
Ipa oru: 1mm Hg (14°C)
Iṣatunṣe: n20/D 1.441 (tan.)
Ojuami Filasi: 200°F

Data Abo
O jẹ ti awọn ọja ti o wọpọ
Awọn kọsitọmu koodu: 2917190090
Oṣuwọn Agbapada Owo-ori okeere (%): 9%

Ohun elo
O ti lo bi agbedemeji ipakokoropaeku fun igbaradi malathion, ipakokoropaeku organophosphorus, ati agbedemeji fun oogun, lofinda ati imuduro didara omi (ọgba polycarboxylic acid phosphonic acid Organic).O tun le ṣee lo bi epo fun resini ati nitrocellulose, plasticizer, Organic synthesis, insecticide, polima monomer ati ṣiṣu Iranlọwọ.

Awọn ohun-ini ati iduroṣinṣin
Idurosinsin ni iwọn otutu yara ati titẹ.Awọn nkan ti o ni idinamọ: awọn aṣoju oxidizing, awọn aṣoju idinku, awọn acids, awọn ipilẹ.Le ti wa ni sisun, san ifojusi si orisun ti ina nigba lilo ati titoju.Dena ifasimu ti vapors ati yago fun olubasọrọ pẹlu awọ ara.

Ọna ipamọ
Tọju ni itura, gbẹ ati aaye ti o ni afẹfẹ.San ifojusi si orisun ina nigba lilo ati titoju.

Ọna sintetiki
1. O jẹ iṣelọpọ nipasẹ esterification ti anhydride maleic ati ethanol ni iwaju sulfuric acid;o tun le gba nipasẹ iyipada paṣipaarọ pẹlu resini paṣipaarọ cation bi ayase.Akoonu ti diethyl maleate ninu ọja ile-iṣẹ jẹ ≥98%, ati pe pupọnu ọja kọọkan n gba 585kg ti anhydride maleic (95%) ati 604kg ti ethanol (95%).
2. Ọna igbaradi rẹ jẹ pataki nipasẹ esterification ti anhydride maleic ati ethanol ni iwaju sulfuric acid.Ilana yii ni awọn iru meji ti titẹ oju aye pẹlu esterification benzene ati titẹ odi laisi esterification benzene.
(1) Ipa oju aye pẹlu esterification benzene
Ṣafikun iye kan ti benzene ati ethanol si ikoko ifaseyin esterification, fi sinu anhydride maleic, ṣafikun sulfuric acid ogidi labẹ gbigbọn, ooru nipasẹ nya jaketi, ki o jẹ ki awọn reactants faragba iṣesi esterification ni iwọn 75 ℃.Omi ti a ti ipilẹṣẹ ti yọ kuro nipasẹ distillation azeotropic ternary pẹlu benzene ati ethanol, ati pe ipele oke ti benzene ati omi ethanol ti wa ni refluxed si ikoko ifaseyin.Nipa 13 ~ 14h nigbamii, nigbati awọn distillation-iṣọ otutu ga soke si 68.2 ℃, awọn separator isalẹ omi ipele ti wa ni ko si ohun to nyara, o nfihan pe gbogbo awọn omi ninu awọn lenu ikoko ti a ti evaporated, awọn esterification lenu ti pari.Duro reflux, tẹsiwaju distillation si 95-100 ℃, distillation ti benzene ati ethanol.Tutu si iwọn 50 ℃, yomi pẹlu 5% olomi iṣuu soda carbonate ojutu, wẹ pẹlu omi lẹhinna yọ benzene ti o ku ati ethanol kuro labẹ igbale lati gba ọja diethyl maleic acid.
(2) odi titẹ benzene-free esterification
Esterification ti maleic anhydride ati ethanol labẹ iṣe ti sulfuric acid ni a gbe jade labẹ igbale kan ati iwọn otutu lati mu ethanol jade ati omi ti ipilẹṣẹ nipasẹ iṣesi ni ipo gaseous, ati lẹhinna ethanol ti yapa nipasẹ iwe ipin si reflux. awọn esterification, ki awọn lenu duro lati wa ni pipe.Ọna yii le kuru ọmọ iṣesi, mu ikore ati didara ọja dara, mu agbegbe iṣẹ ṣiṣẹ, pupọ julọ awọn ohun elo iṣelọpọ ile lo ọna yii.
Ni afikun, resini paṣipaarọ cation tun le ṣee lo bi ayase fun iyipada paṣipaarọ lati gbe awọn diethyl maleic acid.
Ọna isọdọtun: fifọ pẹlu ojutu carbonate potasiomu dilute, gbigbe pẹlu carbonate potasiomu anhydrous tabi imi-ọjọ soda ati distillation labẹ titẹ dinku.


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