Awọn olutaja osunwon ti o dara China ti Chromic Acid Flakes
Awọn pato
Pelu:Cro3
Ohun kikọ:Awọn flakes pupa brownish, tiotuka ninu omi ati ether, majele.
Lilo:Itanna-plating, polishing, Chrome-metal gbóògì, pigmenti, oogun, ayase, oxidant, igi itoju, aise-ohun elo ti Crome ohun elo afẹfẹ, ati be be lo.
Apo:ni UN fọwọsi irin ilu ti 50kg tabi 250kg net kọọkan.
Ṣiṣe awọn iṣedede:GB1610-1999.
| Awọn nkan | Awọn pato | ||
| Ipele A | Ipele B | Ipele C | |
| Cro3≥ | 99.7 | 99.5 | 99.0 |
| Ọ̀rọ̀ tí kò lè sọ omi ≤ | 0.02 | 0.05 | 0.10 |
| Sulfates ≤ | 0.06 | 0.15 | 0.30 |
| Nà≤ | 0.05 | - | - |
Ọna onínọmbà
Ipinnu akoonu chromic acid ni afẹfẹ: a gba ayẹwo nipasẹ àlẹmọ, tituka ni sulfuric acid, ati lẹhinna pinnu nipasẹ Colorimetry (ọna NIOSH) lẹhin fifi diphenylcarbazide kun.
Ipinnu ti akoonu chromic acid ninu omi: ayẹwo jẹ jade ati ṣiṣe nipasẹ spectrometry gbigba atomiki tabi colorimetry.
Ọna isọnu egbin: lẹhin idinku kẹmika, omi idoti chromic acid ti o ni idojukọ yipada si chromium trivalent, ati pe iye pH ti ojutu naa jẹ atunṣe lati dagba ojoriro, ati pe erofo ti wa ni ilẹ bi egbin kemikali.
Idi
Chromic acid jẹ ojutu mimọ ti o wọpọ julọ ti a lo ninu yàrá.O ni mejeeji acidity ati oxidizability.O le yọ idoti ati awọn nkan insoluble kuro lori inu ati ita awọn odi ti awọn ohun elo idanwo.Nigbagbogbo, ojutu fifọ ni a gba nipasẹ fifi potasiomu dichromate sinu sulfuric acid ogidi, ṣugbọn chromium hexavalent jẹ ipalara si agbegbe, ati nigba miiran ohun elo yoo bajẹ ni agbegbe acid ti o lagbara, nitorinaa ohun elo ti ojutu fifọ chromic acid ti dinku.
Chromic acid le ṣee lo bi oxidant.Ọpọlọpọ awọn agbo ogun eleto le jẹ oxidized nipasẹ chromic acid, ati ọpọlọpọ awọn hexavalent chromium orisun oxidants ti ni idagbasoke.Jones reagent: ojutu olomi ti chromic acid, sulfuric acid ati acetone, eyiti o le ṣe oxidize akọkọ ati awọn ọti-atẹle si awọn acids carboxylic ti o baamu ati awọn ketones laisi ni ipa awọn iwe ifowopamosi unsaturated.Pyridinium chlorochromate: pese sile lati chromium trioxide ati pyridine hydrochloride, le oxidize oti akọkọ si aldehyde.Collins reagent: idawọle ti chromium trioxide ati pyridine.
Chromic acid tun le ṣee lo fun fifin chromium, chromium irin ti o ni mimọ, pigmenti, mordant, oogun ati olubasọrọ edu, ati ni iṣelọpọ diẹ ninu awọn glazes ati gilasi awọ.
