Izicelo Ezibanzi kanye Namathemba Okuthuthukiswa Kwe-Sodium Cyanide Embonini

Sodium i-cyanide (I-NaCN), njengezinto ezisetshenziswayo zamakhemikhali ezinobuthi kakhulu kodwa ezisebenza kahle, idlala indima engenakushintshwa emkhakheni wezimboni ngenxa yezakhiwo zayo zamakhemikhali ezihlukile. Izicelo zayo zihlanganisa izimboni eziningi ezibalulekile, kusukela ku- Ukukhishwa Kwezinsimbi Eziyigugu ukwenza kahle ukuhlanganiswa kwamakhemikhali. Kodwa-ke, ngokuqiniswa kwemithetho yokuvikela imvelo kanye nokukhuphuka kobuchwepheshe obuluhlaza, ukuthuthukiswa kwesikhathi esizayo kwe I-Sodium Cyanide ibhekene nezinselele ezintsha namathuba.

I. Izindawo Eziyisisekelo Zokusebenza ze-Sodium Cyanide

1. Ukukhishwa Kwezinsimbi Eziyigugu Nokucutshungulwa Kwamaminerali

I-sodium cyanide iyi-reagent eyinhloko ekumbiweni kwegolide nesiliva. Ngokusebenzisa indlela ye-cyanidation, ingakwazi ukwakha izakhiwo ezincibilikayo ezinegolide nesiliva, okuvumela ukukhishwa okusebenzayo kwezinsimbi eziyigugu ezinsimbini zezinga eliphansi. I-reaction equation imi kanje:

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

Naphezu kwengozi yobuthi, indlela ye-cyanidation isabala ngaphezu kwama-80% wevolumu yokukhipha igolide emhlabeni wonke ngenxa yezindleko zayo eziphansi kanye nezinga eliphezulu lokuthola kabusha.

2. Electroplating kanye Surface Treatment

Embonini ye-electroplating, i-sodium cyanide, njenge-ejenti eyinkimbinkimbi, ingakwazi ukuzinzisa ama-ion ensimbi (njengethusi, i-zinc, ne-cadmium) ukuze kuqinisekiswe ungqimba olufana nolwe-plating oluminyene. Isibonelo, inqubo ye-cyanide zinc plating ingathuthukisa kakhulu ukumelana nokugqwala kwensimbi. Kodwa-ke, ngenxa yengcindezi yokuvikela imvelo, ubuchwepheshe be-electroplating obungena-cyanide (njengokufakwa kwe-zincate zinc) kancane kancane buthatha indawo yezinqubo zendabuko.

3. I-Organic Synthesis kanye ne-Pharmaceutical Intermediates

I-sodium cyanide iyimpahla eluhlaza ebalulekile yokuhlanganiswa kwe-nitrile compounds. Ngokusabela kwe-nucleophilic substitution, iqembu le-CN⁻ lingakwazi ukwethulwa kuma-molecule ephilayo ukuze kukhiqizwe okuphakathi okubalulekile njenge-acrylonitrile (yemicu yokwenziwa) kanye ne-adiponitrile (yenayiloni 66). Ngokwesibonelo:

CH₂=CHCH₂Cl + NaCN → CH₂=CHCH₂CN + NaCl

Emkhakheni wemithi, I-sodium cyanide ibandakanyeka ekwakhiweni kwe-vitamin B12. izidakamizwa zokulwa nomdlavuza, njalonjalo.

4. Izibulala-zinambuzane nezibulala-zinambuzane

I-sodium cyanide ingasetshenziswa ukulungisa izibulala-zinambuzane ezihlukahlukene, njenge-fenvalerate (i-pyrethroid insecticide). Okuphuma kuyo, i-thiocyanate (SCN⁻), iphinde isetshenziswe kuma-herbicides nama-fungicides.

5. Ezinye Izicelo Zezimboni

• Metal Cleaning: Ukukhipha ungqimba lwe-oxide endaweni yensimbi;

• I-mineral Processing Inhibitor: Ukulungisa ukuziphatha kokuntanta kwamaminerali;

• Isandulela Sezikhali Zamakhemikhali: Uhlelo lokusebenza olubucayi oludinga ukulawula okuqinile.

II. Amathemba Entuthuko: Izinselelo Namathuba Akhona Ngokuhlanganyela

1. Ukuvikelwa Kwemvelo kanye Nezingcindezi Zokuphepha

Ubuthi obuphezulu be-sodium cyanide buye baphoqa umhlaba ukuthi uqinise ukugadwa. Isibonelo, i-EU's Registration, Evaluation, Authorization and Restriction of Chemicals (REACH) Regulation ikubeka ohlwini njengento ekhathazayo kakhulu (SVHC), edinga amabhizinisi ukuthi adalule ulwazi lokusetshenziswa. Izingozi zokuvuza zingase ziholele ezinhlekeleleni zemvelo (ezifana nesigameko sokuqhuma kwechweba lase-Tianjin e-China ngo-2015), okuqhubekisela phambili imboni ukuthi iguqulele emgomweni "wokungakhiphi komoya".

2. Ukuqamba Okusha Kwezobuchwepheshe Nezinye Izixazululo

• Ukuthandwa kwezinqubo ezingena-Cyanide:

• Ukukhishwa Kwegolide: Ubuchwepheshe obufana ne-thiourea leaching kanye nendlela ye-bromination bukhula kancane kancane;

• I-Electroplating: Ukusebenzisa ama-ejenti ayinkimbinkimbi afana ne-citrate ne-ethylenediamine ukuze kubuyiselwe ama-cyanides;

• Green Synthesis Pathways: Ukuhlanganiswa kwe-nitrile compounds ngokusebenzisa izindlela ze-biocatalysis (njengokusebenzisa i-nitrile hydratase ukukhiqiza i-acrylamide);

• Imodeli Yomnotho Oyindilinga: Ukuthuthukisa ubuchwepheshe bokutholwa kwe-cyanide (okufana nokuhlukaniswa kolwelwesi kanye nokushintshisana kwe-ion) ukuze kuncishiswe ukusetshenziswa.

3. Amathuba Okukhula Ezinkambini Zenani Eliphezulu

• Izinto Ezintsha Zamandla: I-sodium cyanide isetshenziswa ekuhlanganiseni izanduleli zezinto ze-cathode zamabhethri e-lithium-ion (njenge-lithium nickel cobalt manganate);

• Amakhemikhali E-elekthronikhi: Isetshenziswa njenge-etchant ekukhiqizeni ama-wafers we-semiconductor;

• Pharmaceutical Intermediates: Ngokusheshisa kocwaningo lwezidakamizwa olusha nokuthuthukiswa, isidingo se-sodium cyanide kumakhemikhali amahle singaqhubeka nokukhula.

4. Umehluko Wezimakethe Zesifunda

• Amazwe athuthukile: Isidingo sivame ukuzinza, kugxilwe ekuthuthukisweni kwezobuchwepheshe kanye nokuhambisana nemvelo;

• Izimakethe ezivelayo: Ukwandiswa kwengqalasizinda kanye nezimboni zokukhiqiza kubangela isidingo, esifana nokuthuthukiswa kwezimayini zegolide eNingizimu-mpumalanga ye-Asia nase-Afrika.

III. Amathrendi Azayo Nezimpendulo Zemboni

1.Ukuthuthukiswa Kwezobuchwepheshe: Ukuthuthukisa izinqubo ngokugxilisa okuphansi kwe-sodium cyanide kanye nokuthuthukisa izimo zokusabela ukunciphisa ukusetshenziswa;

2.Ukuphathwa Kwedijithali: Ukuqapha kwesikhathi sangempela sokusetshenziswa kwe-sodium cyanide nge-inthanethi Yezinto (IoT) ukuze kuthuthukiswe ukuphepha;

3.Isiqondiso Senqubomgomo: Uhulumeni udinga ukulinganisa izidingo zezimboni kanye nezinjongo zokuvikela imvelo futhi akhuthaze "Ukuphathwa Kwe-Cyanide Okunesibopho" (njengeKhodi Yokuphathwa Kwe-Cyanide Yamazwe Ngamazwe, i-ICMI);

4.Ukuxhumana Komphakathi: Ukuqinisa ukucaca kwemboni kanye nokunciphisa ukuchema komphakathi kwengqondo ku-cyanide.

Isiphetho

Inani lezimboni le-sodium cyanide lihambisana nobungozi bobuthi bayo. Ngokuzayo, ukuthuthukiswa kwayo kuzoncika emphumeleni we-synergistic wokuqanjwa kabusha kwezobuchwepheshe kanye nokugadwa okuqinile. Nakuba ibhekene nezingcindezi zokushintshwa kweminye imikhakha, ukungabuyiseleki kwayo ezimbonini ezinenani eliphezulu, kanye nempumelelo ezinqubweni eziluhlaza, kusengasivulela izikhala ezintsha zokuyikhulisa. Njengezinye izinto eziyingozi embonini yamakhemikhali, indlela eya ekuthuthukisweni okusimeme kwe-sodium cyanide ilele "ekulawuleni ubungozi kanye nenani lokukhulula".