Ethylene Diamine Tetraacetic Acid Disodium (EDTA Na2)
Kayayyaki: Ethylene Diamine Tetraacetic Acid Disodium (EDTA Na2)
CAS #: 6381-92-6
Formula: C10H14N2O8Na2.2H2O
Nauyin kwayoyin halitta: 372
Tsarin Tsari:
Yana amfani da: Ana amfani da wanki, rini, adjuvant, mai sarrafa kayan zaruruwa, kayan kwalliya, ƙari na abinci, takin noma da sauransu.
Ƙayyadaddun bayanai:
| Abu | Daidaitawa |
| Bayyanar | Farin Foda |
| Asalin (C10H14N2O8Na2.2H2O) | ≥99.0% |
| Plumbum (Pb) | ≤0.0005% |
| Ferrum (Fe) | ≤0.001% |
| Chloride (Cl) | ≤0.05% |
| Sulfate (SO4) | ≤0.05% |
| PH (50g/L; 25 ℃) | 4.0-6.0 |
| Girman Barbashi | 40 mesh≥98.0% |
Aikace-aikace:
EDTA 2NA shine mahimmin ma'anar haɗaɗɗiya don haɗakar da ion ƙarfe da rarraba karafa. Ana amfani da wannan samfurin azaman bleaching kayyade bayani ga launi na kayan hoto masu tasowa da sarrafawa, da rini mai ƙarfi, wakili na jiyya na fiber, ƙari na kwaskwarima, magani, abinci, samar da sinadarai na microfertilizer, ƙwayar jini, wakili mai rikitarwa, wanki, stabilizer, roba roba, polymerization initiator da nauyi karfe ƙididdigewa da chloritium tsarin, da dai sauransu. Ana amfani da EDTA azaman ɓangaren wakili mai aiki, galibi don haɗakar da ions baƙin ƙarfe da sarrafa ƙimar ƙimar polymerization.
Tsarin samarwa:
1.Slowly ƙara cakuda sodium cyanide da formaldehyde zuwa ruwa bayani na ethylenediamine a cikin wani rabo, da kuma wuce iska a 85 ℃ karkashin rage matsa lamba don cire ammonia gas. Bayan amsawar, daidaita darajar Ph zuwa 4.5 tare da sulfuric acid mai tattarawa, sannan canza launi, tacewa, maida hankali, crystallize da ware, kuma bushe don samun samfurin da aka gama.
2. Mix 100kg na chloroacetic acid, 100kg na kankara da 135kg na 30% NaOH bayani, ƙara 18kg na 83% ~ 84% ethylenediamine a ƙarƙashin motsawa, kuma ajiye shi a 15 ℃ na 1h. A hankali ƙara 30% NaOH bayani a cikin batches har sai mai amsawa ya zama alkaline, kuma ajiye shi a dakin da zafin jiki na 12h. Yi zafi zuwa 90 ℃, ƙara carbon da aka kunna don lalata launi. Ana daidaita tacewa zuwa 4.5 Ph tare da hydrochloric acid kuma an tattara shi kuma an tace shi a 90 ℃; tacewa ana sanyaya, crystallized, rabu da wanke, da kuma bushe a 70 ℃ don samun ƙãre samfurin.
3.Made by mataki na ethylenediaminetetraacetic acid da sodium hydroxide bayani: A cikin wani 2L dauki flask sanye take da wani stirrer, ƙara 292g ethylenediaminetetraacetic acid da 1.2L ruwa. Ƙara 200ml na 30% sodium hydroxide bayani a ƙarƙashin motsawa da zafi har sai duk abin ya ƙare. Ƙara 20% hydrochloric acid da neutralize zuwa pH = 4.5, zafi zuwa 90 ℃ kuma mayar da hankali, tace. Ana sanyaya tacewa kuma lu'ulu'u suna haɗe. Cire da ware, wanke da ruwa mai narkewa, bushe a 70 ℃, kuma sami samfurin EDTA 2NA.
4.Add ethylenediaminetetraacetic acid da ruwa zuwa enameled dauki tanki, ƙara sodium hydroxide bayani a karkashin stirring, zafi har sai duk dauki, ƙara hydrochloric acid zuwa pH 4.5, zafi zuwa 90 ° C da kuma mayar da hankali, tace, da tacewa an sanyaya, tace fitar da lu'ulu'u, wanke da ruwa, bushe a 70 ° C, NA.
