Kuchokera ku Sodium Cyanide kupita ku Hydrogen Cyanide: Kuwona Ntchito ndi Kusintha

Ma Cyanides, kuphatikizapo Sodium Cyanide (NaCN) ndi Hydrogen Cyanide (HCN), ndi ena mwa mankhwala oopsa kwambiri komanso ofunikira kwambiri m'mafakitale. Kuchita kwawo kwapadera kumathandiza kuti ntchito zigwiritsidwe ntchito mu migodi ya golide, mankhwala, mapulasitiki, ndi zina zambiri. Nkhaniyi ikufotokoza za makhalidwe, ntchito, ndi kusintha kwa mankhwala pakati pa ma cyanides awiriwa , pamene ikulankhula za mavuto a chitetezo ndi zatsopano zaukadaulo.

I. Katundu ndi Ntchito za Sodium Cyanide

1. Zakudya Zamakono

Sodium cyanide ndi crystalline yoyera yolimba, yosungunuka kwambiri m'madzi. Kuopsa kwake kumachokera ku cyanide ion (CN⁻), yomwe imaletsa kupuma kwa maselo mwa kumamatira ku cytochrome oxidase.

2. Zogwiritsa Ntchito Zamakampani

• Kuchotsa Golide : Monga tafotokozera kale, NaCN imasungunula golide kudzera mu yankho:

4Au + 8NaCN + O₂ + 2H₂O → 4NaAu(CN)₂ + 4NaOH

• Kupaka ma electroplating : Kumalimbitsa ma ayoni achitsulo mu zokutira (monga zinc, copper).

• Kupanga Kwachilengedwe : Choyambitsa nitriles, adiponitrile (nayiloni), ndi mankhwala.

• Mankhwala ophera tizilombo : Amagwiritsidwa ntchito mu mankhwala ophera tizilombo monga fenvalerate.

II. Hydrogen Cyanide: katundu ndi ntchito

1. Zakudya Zamakono

Hydrogen cyanide ndi madzi/gesi wopanda mtundu wokhala ndi fungo lowawa la amondi. Imasinthasintha kwambiri ndipo imalowa mwachangu pokoka mpweya kapena kukhudzana ndi khungu.

2. Zogwiritsa Ntchito Zamakampani

• Mankhwala : Kupanga mavitamini (monga B12), mankhwala oletsa chithokomiro.

• Mapulasitiki : Kupanga acrylonitrile (yomwe imagwiritsidwa ntchito mu mapulasitiki a ABS ndi ulusi wopangidwa).

• Ulimi : Chofukiza cha tirigu wosungidwa komanso chophera tizilombo toyambitsa matenda m'nthaka.

• Nkhondo ya Mankhwala : Kugwiritsa ntchito zida zakale ngati chida, tsopano kwalamulidwa mosamala.

III. Njira Zosinthira Pakati pa NaCN ndi HCN

1. Kuchokera ku NaCN kupita ku HCN

Pansi pa acidic (pH <7), NaCN imatulutsa mpweya wa HCN:

NaCN + HCl → NaCl + HCN↑

Izi ndizofunika kwambiri pakukumba golide; kusakwanira kwa alkalinity (mwachitsanzo, kutsika kwa CaO kuwonjezera) kungayambitse kutulutsa kwa mpweya wa HCN, kuyika ziwopsezo zazikulu zachitetezo.

2. Kuchokera ku HCN kupita ku NaCN

HCN ikhoza kusamalidwa ndi maziko amphamvu kuti apangenso mchere wa cyanide:

HCN + NaOH → NaCN + H₂O

Njirayi imagwiritsidwa ntchito muzopaka gasi kuti zithetse mitsinje yotulutsa HCN.

3. Oxidation ndi Kuwonongeka

Onse NaCN ndi HCN amatha kuchotsedwa kudzera mu okosijeni:

• Kusakaniza kwa chlorine :

2CN⁻ + 5ClO⁻ + H₂O → 2CO₂↑ + N₂↑ + 5Cl⁻ + 2OH⁻

• Kutulutsa kwa ozoni :

CN⁻ + O₃ → CNO⁻ + O₂

IV. Zovuta Zachitetezo ndi Kuwongolera Zowongolera

1. Poizoni ndi Zowopsa Zachilengedwe

• Thanzi la Anthu : Kupuma mpweya wa HCN (mlingo woopsa: ~50–200 mg) kumayambitsa kukomoka msanga komanso imfa.

• Zotsatira Zachilengedwe : Kuipitsidwa kwa cyanide m'madzi kumatha kupha zamoyo zam'madzi; kutayikira kwakale (monga tsoka la Baia Mare la 2000) kukuwonetsa zoopsa.

2. Njira Zowongolera

• Gulu la UN : HCN ndi mankhwala a Schedule 3 pansi pa Mgwirizano wa Zida Zamankhwala.

• Malire a OSHA : Malire ololedwa owonetsera (PEL) a HCN: 10 ppm (8-hour TWA).

• Malangizo a ICMI : Khodi Yoyang'anira Cyanide Yapadziko Lonse imafuna kuti migodi izigwira ntchito mosamala.

V. Zatsopano mu Kuwongolera kwa Cyanide

1. Njira Zopangira Zotetezedwa

• Kupanga Malo : HCN imapangidwa kwambiri kudzera mu ammoxidation yolamulidwa ya methane (monga, CH₄ + NH₃ + 1.5O₂ → HCN + 3H₂O ), kuchepetsa zoopsa zoyendera.

• Njira Zina Zopanda Cyanide :

• Kutulutsa Golide : Thiourea, bromine, kapena zakumwa za ionic.

• Kupaka Electroplating : Zinc-nickel alloys zopanda cyanide.

2. Kuyang'anira Dijito

Masensa a IoT ndi ma algorithms a AI amathandizira kutsata zenizeni zenizeni za cyanide mumlengalenga ndi madzi, kuchepetsa kutayikira.

VI. Future Trends

• Kupanga Kobiriwira : Kupanga ma nitrile pogwiritsa ntchito ma enzyme (monga nitrile hydratase).

• Kugwiritsa Ntchito Mphamvu : HCN ngati chonyamulira cha haidrojeni m'maselo amafuta.

• Chuma Chozungulira : Kubwezeretsa cyanide kuchokera ku zinyalala kudzera mu kusefa kwa nembanemba kapena kulowetsedwa kwa madzi.

Kutsiliza

Kugwirizana pakati pa sodium cyanide ndi hydrogen cyanide kukuwonetsa ntchito zawo ziwiri monga antchito ogwira ntchito m'mafakitale komanso zoopsa zachilengedwe. Ngakhale kuti ntchito zawo zikadali zofunika kwambiri m'magawo monga migodi ndi mankhwala, kupita patsogolo kwaukadaulo ndi malamulo okhwima zikuyendetsa njira zotetezeka. Tsogolo la mankhwala a cyanide lili pakulinganiza bwino ntchito ndi kukhazikika, kuonetsetsa kuti mankhwala amphamvu awa amatumikira anthu popanda kuwononga thanzi kapena dziko lapansi.