Disodium-ka Ethylene Diamine Tetraacetic Acid (EDTA Na2)
Badeecada: Ethylene Diamine Tetraacetic Acid Disodium (EDTA Na2)
Lambarka CAS: 6381-92-6
Qaacidda: C10H14N2O8Na2.2H2O
Miisaanka molecular: 372
Qaacidada Qaab-dhismeedka:
Isticmaal: Waxaa lagu dabaqi karaa saabuunta, rinjiyeynta, wakiilka farsamaynta ee fiilooyinka, waxyaabaha lagu daro qurxinta, waxyaabaha lagu daro cuntada, bacriminta beeraha iwm.
Tilmaamaha:
| Shay | Heerka Caadiga ah |
| Muuqaalka | Budada Cad |
| Baaritaan (C)10H14N2O8Na2.2H2O) | ≥99.0% |
| Plumbum (Pb) | ≤0.0005% |
| Ferrum (Fe) | ≤0.001% |
| Koloriin (Cl) | ≤0.05% |
| Sulfate (SO2)4) | ≤0.05% |
| PH(50g/L; 25℃) | 4.0-6.0 |
| Cabbirka Walxaha | ⼜40mesh≥98.0% |
Codsiga:
EDTA 2NA waa wakiil muhiim u ah isku-dhafka ayoonnada birta iyo kala-soocidda biraha. Badeecadan waxaa loo isticmaalaa sidii xal lagu hagaajinayo cadayashada si loo sameeyo iyo loo farsameeyo walxaha sawirka midabka leh, iyo kaaliyayaasha rinjiga, wakiilka daaweynta faybarka, waxyaabaha lagu daro qurxinta, daawada, cuntada, wax soo saarka kiimikada beeraha ee beeraha, xinjirowga dhiigga, wakiilka isku-dhafka ah, saabuunta, xasiliyaha, caagga synthetic-ga, bilaabaha polymerization iyo wakiilka falanqaynta tirada birta culus, iwm. Nidaamka bilowga dhimista koloriin-ka ee polymerization-ka SBR, disodium EDTA waxaa loo isticmaalaa qayb ka mid ah wakiilka firfircoon, inta badan si loo xoojiyo ayoonnada birta iyo xakamaynta heerka falcelinta polymerization.
Habka Wax Soo Saarka:
1. Si tartiib ah ugu dar isku darka sodium cyanide iyo formaldehyde xalka biyaha ee ethylenediamine oo leh saami go'an, oo hawada ku mari 85℃ cadaadis yar si aad uga saarto gaaska ammonia. Ka dib falgalka, qiimaha Ph u hagaaji 4.5 adoo isticmaalaya aashitada sulfuric ee xooggan, ka dibna midab ka saar, shaandhee, xoog saar, kiristaaleey oo kala saar, oo qalaji si aad u hesho badeecada dhammaatay.
2. Isku qas 100kg oo aashitada chloroacetic ah, 100kg oo baraf ah iyo 135kg oo ah 30% xal NaOH ah, ku dar 18kg oo ah 83% ~ 84% ethylenediamine adigoo walaaqaya, oo ku hay 15℃ muddo 1 saac ah. Si tartiib ah ugu dar 30% xal NaOH ah dufcado ilaa fal-galuhu noqdo alkaline, oo ku hay heerkulka qolka muddo 12 saacadood ah. Kuleyl ilaa 90℃, ku dar kaarboon firfircoon si aad u beddesho midabka. Shaandhada waxaa loo hagaajiyaa 4.5 Ph oo leh aashitada hydrochloric waxaana la ururiyaa oo lagu sifeeyaa 90℃; shaandhada waa la qaboojiyaa, la kariyaa, la kala soocaa oo la dhaqaa, oo la qalajiyaa 70℃ si loo helo badeecada dhammaatay.
3. Waxaa lagu sameeyay ficilka aashitada ethylenediaminetetraacetic iyo xalka sodium hydroxide: Weel falgal ah oo 2L ah oo lagu rakibay walaaq, ku dar 292g aashitada ethylenediaminetetraacetic iyo 1.2L oo biyo ah. Ku dar 200mL oo ah 30% xal sodium hydroxide ah adigoo walaaqaya oo kululee ilaa falcelinta oo dhan ay dhammaato. Ku dar 20% aashitada hydrochloric oo dhexdhexaad ka dhig pH = 4.5, ku kululee 90℃ oo xoog saar, shaandhee. Shaandhada waa la qaboojiyaa oo kiristaalo ayaa la soo daadiyaa. Soo saar oo kala sooc, ku dhaq biyo la safeeyey, ku qalaji 70℃, oo hel EDTA 2NA.
4. Ku dar asiidhka ethylenediaminetetraacetic iyo biyo taangiga falgalka ee dhaldhalaalka ah, ku dar xalka sodium hydroxide adigoo walaaqaya, kululee ilaa falcelinta oo dhan, ku dar asiidhka hydrochloric pH 4.5, ku kululee ilaa 90°C oo xoogga saar, shaandhee, shaandhada waa la qaboojiyaa, shaandhee kiristaalo, ku dhaq biyo, ku qallaji 70°C, oo hel EDTA 2NA.
