Arsenic distillation da tsarkakewa tsari

Tsarin arsenic distillation da tsarkakewa shine hanyar da ke amfani da bambanci a cikin rashin daidaituwa na arsenic da mahadi don rabuwa da tsarkakewa, musamman dacewa don cire sulfur, selenium, tellurium da sauran ƙazanta a cikin arsenic.Ga mahimman matakai da la'akari:

1.Raw kayan pretreatment

• Tushen danyen arsenic: yawanci a matsayin samfur na narkewar ma'adanai masu ɗauke da arsenic (misali arsenite, realgar) ko sharar arsenic da aka sake yin fa'ida.
• Gasasshen Oxidative(na zaɓi): Idan albarkatun arsenic sulfide ne (misali As₂S₃), yana buƙatar a fara gasa shi don canzawa zuwa As₂O₃ mara ƙarfi.

As2S3+9O2→As2O3+3SO2As2S3+9O2→ Kamar yadda2O3+3SO2

2.Naúrar distillation

• Kayan aiki: Quartz ko yumbu har yanzu (lalata resistant, high zafin jiki resistant), sanye take da condenser tube da karbar kwalban.
• Kariyar rashin aiki: Ana gabatar da Nitrogen ko carbon dioxide don hana arsenic oxidation ko haɗarin fashewa ( tururin arsenic yana ƙonewa).

3.Tsarin distillation

• Kula da yanayin zafi:
  • Arsenic sublimation: As₂O₃ sublimation a 500-600 °C (tsarkakken arsenic sublimation a kusan 615 °C).
  • Rabuwar rashin tsarki: ƙazantar ƙarancin tafasa kamar su sulfur da selenium an fi son canzawa kuma ana iya raba su ta hanyar gurɓatacce.
• Tarin tari: Arsenic tururi condens zuwa high-tsarki As₂O₃ ko elemental arsenic a cikin condensation yankin (100-200 ° C).).

4.Bayan aiwatarwa

• Ragewa(idan ana buƙatar elemental arsenic): Rage As₂O₃ tare da carbon ko hydrogen

As2O3+3H2→2As+3H2OAs2O3+3H2→2As+3H2O

• Vacuum distillation: ƙarin tsarkakewa na arsenic na asali don cire gurɓataccen gurɓataccen abu.

5.Matakan kariya

• Kariyar guba: Dukkanin tsari yana aiki ne na rufewa, sanye take da gano leaks na arsenic da kayan aikin gaggawa na gaggawa.
• Maganin wutsiya: Bayan daɗaɗɗen, iskar wutsiya yana buƙatar shayar da maganin lye (kamar NaOH) ko kunna adsorption na carbon don guje wa As₂O₃fitar da hayaki.
• Arsenic karfe ajiya: an adana shi a cikin yanayi mara kyau don hana iskar oxygenation ko lalata.

6. TsaftaHaɓakawa

• Multi-mataki distillation: Maimaita distillation na iya inganta tsabta zuwa fiye da 99.99%.
• Narkewar yanki (na zaɓi): Gyara yanki na arsenic na asali don ƙara rage ƙazantattun ƙarfe.

Filayen aikace-aikace

Ana amfani da arsenic mai tsabta a cikin kayan semiconductor (misali GaAslu'ulu'u), gami da ƙari, ko a cikin kera gilashin na musamman. Processes suna buƙatar bin ƙa'idodin muhalli masu tsauri don tabbatar da aminci da zubar da shara.