He Kaihoko Raraunga Pai Haina o nga Tapapa Waikawa Chromic
Whakatakotoranga
Tikanga:KRO3
Pūāhua:He tawerewere whero parauri, he wairewa ki te wai me te etera, he paihana.
Whakamahinga:Te whakakikorua hiko, te whakakorikori, te hanga chrome-metal, te pigment, te rongoa, te whakakorikori, te waikura, te tiaki rakau, te raw-mate o te crome oxide, etc.
Mōkī:i roto i te UN kua whakaaetia nga pahu rino 50kg ranei 250kg kupenga ia.
Whakahaerenga paerewa:GB1610-1999？
| Nga taonga | Whakatakotoranga | ||
| Kōeke A | Kōeke B | Kōeke C | |
| KRO3％≥ | 99.7 | 99.5 | 99.0 |
| Mahinga wairewa％≤ | 0.02 | 0.05 | 0.10 |
| Ngā pūkawa ％≤ | 0.06 | 0.15 | 0.30 |
| Na％≤ | 0.05 | - | - |
Tikanga tātari
Te whakatau i te ihirangi waikawa chromic i te hau: i kohia te tauira ma te tātari, ka rewa ki te waikawa sulfuric, katahi ka whakatauhia e te Colorimetry (te tikanga NIOSH) i muri i te taapiri i te diphenylcarbazide.
Te whakatau i te ihirangi waikawa chromic i roto i te wai: ka tangohia te tauira ka whakatauhia e te spectrometry whakaurunga ngota, te tae ranei.
Te tikanga tuku para: i muri i te whakahekenga matū, ka huri te wai para waikawa chromic concentrated ki te chromium trivalent, ka whakatikahia te uara pH o te otinga ki te hanga i te rerenga, ka whakakiia te parataiao hei para matū.
Te kaupapa
Ko te waikawa Chromic te otinga horoi e whakamahia ana i roto i te taiwhanga.He waikawa me te oxidizability.Ka taea e ia te tango i nga paru me nga matū kore e rewa i runga i nga pakitara o roto me waho o nga taputapu whakamatautau.I te nuinga o te wa, ka whiwhihia te otinga horoi ma te taapiri i te konupora dichromate ki roto i te waikawa sulfuric kukū, engari he kino te chromium hexavalent ki te taiao, a, i etahi wa ka pakaru te taputapu i roto i te taiao waikawa kaha, na reira kua whakaitihia te tono o te wairewa horoi waikawa chromic.
Ka taea te whakamahi i te waikawa Chromic hei waikura.He maha nga puhui pararopi ka taea te waikura e te waikawa chromic, a he maha nga hauhautanga hauhaumanu hexavalent chromium kua hangaia.Reagent Jones: wairewa wai o te waikawa chromic, waikawa pungatara me te acetone, ka taea te whakapouri i nga waipiro tuatahi me te tuarua ki nga waikawa warowairaka me nga ketone e rite ana me te kore e pa ki nga here kore.Pyridinium chlorochromate: ka mahia mai i te chromium trioxide me te pyridine hydrochloride, ka taea te whakapouri i te waipiro tuatahi ki te aldehyde.Reagent Collins: te taapiri o te chromium trioxide me te pyridine.
Ka taea hoki te whakamahi i te waikawa Chromic mo te whakakikorua chromium, te chromium whakarewa parakore teitei, te poaka, te mordant, te rongoa me te whakapiri waro, tae atu ki te hanga i etahi karaehe me te karaehe tae.
