Likopo tse Atolositsoeng le Litebello tsa Nts'etsopele ea Sodium Cyanide indastering

Sodium cyanide (NaCN), e le sesebelisoa sa lik'hemik'hale se chefo haholo empa se sebetsa hantle, se bapala karolo e ke keng ea nkeloa sebaka lefapheng la indasteri ka lebaka la thepa ea eona e ikhethang ea lik'hemik'hale. Lisebelisoa tsa eona li akaretsa liindasteri tse ngata tsa bohlokoa, ho tloha ho Ho Nkoa Litšepe Tse Bohlokoa ho kopanya hantle lik'hemik'hale. Leha ho le joalo, ka ho tiisa melao ea ts'ireletso ea tikoloho le ho phahama ha theknoloji e tala, tsoelo-pele ea nakong e tlang ea Sodium cyanide e tobane le mathata le menyetla e mecha.

I. Libaka tsa Kopo ea Core ea Sodium Cyanide

1. Ho Nkoa ha Litšepe Tsa Bohlokoa le Ts'ebetso ea Liminerale

Sodium cyanide ke sesebelisoa sa mantlha sa merafo ea khauta le silevera. Ka mokhoa oa cyanidation, e ka etsa li-complexes tse qhibilihang ka khauta le silevera, e leng se nolofalletsang ho ntšoa ha litšepe tsa bohlokoa ho tsoa ho ores ea boemo bo tlase. Reaction equation ke e latelang:

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

Ho sa tsotellehe kotsi ea chefo, mokhoa oa cyanidation o ntse o ikarabella ho feta 80% ea molumo oa lefats'e oa ho ntšoa ha khauta ka lebaka la theko e tlaase le sekhahla se phahameng sa ho hlaphoheloa.

2. Electroplating le Surface Treatment

Ka indasteri ea electroplating, sodium cyanide, e le ntho e rarahaneng, e ka tsitsisa li-ion tsa tšepe (tse kang koporo, zinki le cadmium) ho etsa bonnete ba hore ho na le lesela le lekanang le le teteaneng. Mohlala, ts'ebetso ea cyanide zinc plating e ka ntlafatsa haholo ho hanyetsa kutu ea tšepe. Leha ho le joalo, ka lebaka la likhatello tsa ts'ireletso ea tikoloho, theknoloji e se nang cyanide ea electroplating (e kang plating ea zinc) butle-butle e nkela mekhoa ea setso sebaka.

3. Organic Synthesis le Pharmaceutical Intermediates

Sodium cyanide ke ntho ea bohlokoa e tala bakeng sa motsoako oa metsoako ea nitrile. Ka liphetoho tsa nucleophilic substitution, sehlopha sa CN⁻ se ka kenngoa ka har'a limolek'hule tsa tlhaho ho hlahisa li-intermediate tsa bohlokoa tse kang acrylonitrile (bakeng sa li-synthetic fibers) le adiponitrile (bakeng sa nylon 66). Ka mohlala:

CH₂=CHCH₂Cl + NaCN → CH₂=CHCH₂CN + NaCl

Lefapheng la meriana, Sodium cyanide e ameha tlhahisong ea vithamine B12. lithethefatsi tse thibelang mofetše, joalo-joalo.

4. Meriana e bolaeang likokoanyana le e bolaeang likokoanyana

Sodium cyanide e ka sebelisoa ho lokisa mefuta e fapaneng ea likokoanyana, joalo ka fenvalerate (sebolaea-likokoanyana sa pyrethroid). Motsoako oa eona, thiocyanate (SCN⁻), e boetse e sebelisoa ho li-herbicides le fungicides.

5. Lisebelisoa tse ling tsa Indasteri

• Ho Hloekisa Metal: Ho tlosa lera la oxide holim'a tšepe;

• Inhibitor ea ho sebetsa ka liminerale: Ho lokisa boitšoaro ba ho phaphamala ha liminerale;

• Selelekela sa Libetsa tsa Lik'hemik'hale: Sesebelisoa se hlokolosi se hlokang taolo e tiileng.

II. Melemo ea Ntlafatso: Liphephetso le Menyetla li Kopane

1. Tšireletso ea Tikoloho le Likhatello tsa Polokeho

Chefo e phahameng ea sodium cyanide e qobelletse lefatše ho matlafatsa taolo. Mohlala, Regulation ea EU's Registration, Evaluation, Authorization and Restriction of Chemicals (REACH) Regulation e e thathamisa e le ntho e amehang haholo (SVHC), e hlokang hore likhoebo li senole litaba tsa tšebeliso. Likotsi tsa ho lutla li ka lebisa ho likoluoa ​​​​tsa tikoloho (joalo ka ketsahalo ea ho phatloha ha Tianjin Port naheng ea China ka 2015), ho etsa hore indasteri e fetohe ho fihlela sepheo sa "zero emission".

2. Boqapi ba Theknoloji le Litharollo tse ling

• Ho tsebahala ha Mekhoa e se nang Cyanide:

• Khauta ea Khauta: Litheknoloji tse kang thiourea leaching le mokhoa oa bromination li ntse li hola butle-butle;

• electroplating: Ho sebelisa li-complex agents tse kang citrate le ethylenediamine ho nkela sebaka li-cyanides;

• Green Synthesis Litsela: Ho kopanya metsoako ea nitrile ka mekhoa ea biocatalysis (e kang ho sebelisa nitrile hydratase ho hlahisa acrylamide);

• Mohlala oa Moruo o chitja: Ho nts'etsapele mahlale a ho hlaphoheloa a cyanide (joalo ka karohano ea membrane le phapanyetsano ea ion) ho fokotsa tšebeliso.

3. Monyetla oa Kholiso Makhapheng a Keketso ea boleng bo Holimo

• Lisebelisoa tse Ncha tsa Matla: Sodium cyanide e sebelisoa ha ho etsoa li-precursors bakeng sa lisebelisoa tsa cathode tsa libeteri tsa lithium-ion (tse kang lithium nickel cobalt manganate);

• Lik'hemik'hale Tsa Elektronike: E sebelisoa e le mokhoa oa ho etsa liphaephe tsa semiconductor;

• Mekhatlo ea Meriana: Ka ho potlakisa lipatlisiso le nts'etsopele ea lithethefatsi tse ncha, tlhoko ea sodium cyanide ka lik'hemik'hale tse ntle e ka tsoela pele ho hola.

4. Phapang ea 'Maraka ea Libaka

• Linaha Tse Tsoetseng Pele: Tlhokahalo e batla e tsitsitse, ho tsepamisitsoe maikutlo ntlafatsong ea thekenoloji le tumellanong le tikoloho;

• Mabenkele a hlahang: Katoloso ea meralo ea motheo le liindasteri tsa tlhahiso e tsamaisa tlhokahalo, joalo ka nts'etsopele ea merafo ea khauta Asia Boroa-bochabela le Afrika.

III. Mekhoa ea Bokamoso le Likarabo tsa Indasteri

1.Lintlafatso tsa Theknoloji: Ho nts'etsapele lits'ebetso tse nang le maemo a tlase a sodium cyanide le ho ntlafatsa maemo a karabelo ho fokotsa ts'ebeliso;

2.Digital Management: Tlhokomelo ea nako ea sebele ea tšebeliso ea sodium cyanide ka Inthanete ea Lintho (IoT) ho matlafatsa polokeho;

3. Tataiso ea Leano: Mmuso o hloka ho leka-lekanya tlhokahalo ea indasteri le sepheo sa ts'ireletso ea tikoloho le ho khothaletsa "Responsible Cyanide Management" (joalo ka Khoutu ea Tsamaiso ea Cyanide ea Machabeng, ICMI);

4.Puisano ea Phatlalatso: Ho matlafatsa ponaletso ea indasteri le ho fokotsa leeme la temoho ea sechaba mabapi le cyanide.

fihlela qeto e

Boleng ba indasteri ea sodium cyanide bo tsamaisana le likotsi tsa eona tsa chefo. Nakong e tlang, nts'etsopele ea eona e tla itšetleha ka phello ea synergistic ea tlhahiso ea theknoloji le tlhokomelo e tiileng. Leha e tobane le likhatello tsa ho nkela sebaka mafapheng a mang, ho se nkeloe sebaka ke liindasteri tsa boleng bo holimo, hammoho le katleho ea lits'ebetso tse tala, e ntse e ka bula libaka tse ncha tsa kholo bakeng sa eona. Joalo ka lintho tse ling tse kotsi indastering ea lik'hemik'hale, tsela ea nts'etsopele e tsitsitseng ea sodium cyanide e "laola likotsi le ho lokolla boleng".