Etidronic Acid/ HEDP/CAS：2809-21-4
Kev Piav Qhia Luv:
Lub npe khoom: Etidronic Acid
CAS: 2809-21-4
MF: C2H8O7P2
MW: 206.03
QAUV:
Qhov Ceev: 1.45 (60% aq.)
Lub ntsiab lus kub hnyiab: 198 ~ 199 ℃
Cov khoom ntshiab yog siv lead ua dawb. Cov khoom lag luam tsis muaj xim rau cov kua daj daj ntshiab. Nws yooj yim yaj hauv dej thiab kuj yaj hauv methanol thiab ethanol. Hydroxyethylidene diphosphonic acid yog cov khoom siv tshuaj lom neeg thiab feem ntau siv rau hauv kev kho dej hauv kev lag luam, cov khoom siv ntxuav hauv tsev thiab cov khoom siv tu tus kheej.
cov lus qhia tshwj xeeb
| Khoom | Cov Lus Qhia Tshwj Xeeb |
| Qhov tsos | Dawb siv lead ua |
| Cov ntsiab lus nquag (raws li kua qaub)% | ≥98.0% |
| Cov ntsiab lus nquag (raws li HEDP.H20)% | ≥90.0% |
| PH (1%) | ≤2 |
| Phosphoric acid (raws li PO43-)% | ≤0.5 |
| Chloride (raws li CI-) ppm | ≤100 |
| Fe ion ppm | ≤5 |
| Phosphorus acid (raws li PO33-)% | ≤0.8 |
Kev Siv
Cov khoom no yog cov khoom siv tseem ceeb rau kev siv hluav taws xob uas tsis muaj cyanide. Thaum muab cov khoom no ua cov tshuaj cyanide uas tsis muaj cyanide rau hauv cov tshuaj electroplating tooj liab, nws muaj lub zog sib txuas zoo thaum ncaj qha siv hluav taws xob rau ntawm sodium hlau. Cov txheej txheej no du thiab ci ntsa iab. Feem ntau, cov tshuaj uas muaj 60% yog 100 - 120 ml/L. Cov tshuaj tooj liab sulfate yog 15 - 20 g/L. Tsis tas li ntawd, ua ntej siv hluav taws xob, muab cov khoom siv hluav taws xob tso rau hauv 1% - 2% cov tshuaj ntawm cov khoom no kom cov khoom siv hluav taws xob hloov mus ua lub xeev ua haujlwm. Kev siv hluav taws xob tom qab cov kauj ruam no tuaj yeem txhim kho qhov cuam tshuam ntxiv. Hydroxyethylidene diphosphonic acid (HEDP) yog ib hom tshuaj tshiab uas tsis muaj chlorine siv hluav taws xob. Nws yog siv los ua tus neeg sawv cev tseem ceeb rau kev ruaj khov dej hauv cov dej txias, ua lub luag haujlwm tiv thaiv kev xeb thiab tiv thaiv kev ntsuas. Cov khoom no yog ib qho ntawm cov tshuaj kho dej organic polyphosphonic acid. Tseem muaj qee yam khoom zoo li no uas tsim tawm hauv Suav teb, xws li amino trimethylene phosphonic acid (ATMP): [CH2PO(OH)2]3N, thiab ethylenediamine tetra(methylene phosphonic acid) (EDTMP), thiab lwm yam. Cov organic polyphosphonic acids tau tsim nyob rau xyoo 1960s thiab tau lees paub nyob ib puag ncig xyoo 1970s. Kev tshwm sim ntawm cov tshuaj kho dej no tau ua rau cov thev naus laus zis kho dej nce siab heev. Piv nrog cov inorganic polyphosphates, cov organic polyphosphonic acids muaj kev ruaj khov tshuaj zoo, tsis yooj yim rau hydrolyze, tuaj yeem tiv taus qhov kub siab, xav tau me me ntawm tus neeg sawv cev, thiab tseem muaj cov khoom ntawm ob qho tib si corrosion thiab scale inhibition. Lawv yog ib hom cathodic corrosion inhibitors thiab kuj yog ib hom non-stoichiometric scale inhibitors. Thaum siv ua ke nrog lwm cov neeg sawv cev kho dej, lawv qhia txog qhov zoo tshaj plaws synergistic effect. Lawv muaj peev xwm chelating zoo heev rau ntau cov hlau ions xws li calcium, magnesium, tooj liab, thiab zinc. Lawv txawm muaj qhov cuam tshuam zoo rau cov ntsev inorganic ntawm cov hlau no, xws li CaSO4, CaCO3, MgSiO3, thiab lwm yam. Yog li ntawd, lawv siv dav hauv kev kho dej. Cov tshuaj phosphorylating reagents siv rau kev tiv thaiv serine thiab pyranose.
Ntim thiab Xa Khoom
Ntim: 25kg raws li cov neeg siv khoom xav tau.
Kev xa khoom: yog cov tshuaj lom neeg thiab tuaj yeem xa los ntawm tsheb ciav hlau, dej hiav txwv thiab huab cua.
Khaws cia thiab khaws cia
Lub neej txee: 24 lub hlis txij li hnub tsim khoom hauv cov ntim khoom tsis tau qhib khaws cia rau hauv qhov chaw txias thiab qhuav kom tsis txhob raug tshav ntuj ncaj qha, dej.
Lub tsev rau khoom muaj cua nkag, ziab kom qhuav kub tsawg, Sib cais ntawm cov tshuaj oxidants, cov kua qaub.
