Sodium Cyanide (NaCN) - Mekhoa ea Tlhahiso, Papiso ea Boleng ba Lihlahisoa le Chain ea Boleng ba Indasteri

Selelekela

Sodium cyanide (NaCN) ke lik'hemik'hale tsa mantlha tsa indasteri merafong le lik'hemik'hale tse ntle, tse sebelisoang haholo bakeng sa ho lahla khauta le lirafshoa tse ling tsa bohlokoa. United Chemical e lokisetsa tlhahiso ea indasteri ena ho hlalosa, ka puo e hlakileng empa e le setsebi, mekhoa e meholo ea tlhahiso ea indasteri bakeng sa Sodium cyanide, likarolo tsa tekheniki le phapang ea boleng ba sehlahisoa ea ts'ebetso ka 'ngoe, ketane ea boleng ba indasteri, le matla a khoebo a machabeng. Sepheo ke ho tsebisa bareki, balekane le sechaba ka bophara ha ho ntse ho totobatsoa polokeho, boikamahanyo le phepelo e nang le boikarabelo.

Tlhokomeliso ea polokeho:sodium cyanide e chefo haholo. Tlhahiso, lipalangoang, polokelo le ts'ebeliso li tlameha ho latela ka tieo melaoana ea polokeho ea naha le ea libaka, tikoloho le thepa e kotsi. Sengoliloeng sena ke sa merero ea tlhahisoleseling le papatso feela mme se etsa joalo eseng fana ka lintlha tsa ts'ebetso kapa litlolo tse ka sebelisoang hampe.

1. Ke eng Sodium cyanide? (E khuts'oane)

Sodium cyanide (NaCN) ke letsoai le lesoeu, la cubic crystalline inorganic le etsang metsoako e qhibilihang ka khauta le litšepe tse ling tse ntle. Ka lebaka la thepa ena e sebelisoa haholo ho leaching ea diminerale (haholo-holo khauta cyanidation). E boetse e fumana ts'ebeliso ho li-electroplating, meriana le li-intermediates tse ntle tsa lik'hemik'hale, agrochemical synthesis, le joalo ka reagent lilaboratoring. Ka lebaka la chefo ea eona, taolo e matla, boitokisetso ba maemo a tšohanyetso le taolo ea tikoloho li bohlokoa ho pholletsa le ketane ea phepelo.

2. Mekhoa e meholo ea tlhahiso ea indasteri le litšobotsi tsa tekheniki (boemo bo phahameng)

Mekhoa ea khale ea tlhahiso ea liindasteri e neng e sebelisoa kapa e sebelisoang hona joale e kenyelletsa: fusion/smelting (historical), mokhoa oa An, ho petsoha ha oli e bobebe, methanol–ammoniation, le acrylonitrile by-product (co-product) recovery. Ka tlase re akaretsa ts'ebetso e 'ngoe le e' ngoe, melemo/mefokolo ea eona, le litšobotsi tse tloaelehileng tsa boleng ba sehlahisoa ho thusa bareki le balekane ho utloisisa likamano tsa boleng ba ts'ebetso.

1) Mokhoa oa ho kopanya / ho qhibilihisa (histori)

Kakaretso ea ts'ebetso: tsela e tloaelehileng ea sebōpi / e kopanyang e hlahisang litšila tse ngata tse tiileng, tse metsi le tse nang le khase le ho sebelisa matla a mangata.
Boemo: E felisitsoe haholo indastering ea sejoale-joale ka lebaka la bofokoli ba tikoloho le matla.
Boleng bo tloaelehileng ba sehlahisoa:

• Bohloeki (Litaba tsa NaCN): ka kakaretso e tlase ebile e fetoha.

• Litšila tsa 'mele / sebabole: e batlang e phahame, ho itšetlehile ka mafura le lisebelisoa tse tala.

• Litšepe tse boima: e ka phahamisoa haeba thepa e tala kapa thepa e sa laoloe ka thata.

• Mongobo / ho baka: mongobo o phahameng le botsitso bo fokolang ba polokelo haeba ho omisa / ka mor'a phekolo ho sa lekana.

• Foromo: maqeba a mahoashe kapa likaroloana tse sa tloaelehang; hangata e hloka ntlafatso e tlase.
  Ho tšoaneleha ho theoha: e futsanehileng bakeng sa ts'ebeliso ea maemo a holimo kapa e bobebe (litlhare, lisebelisoa tsa elektroniki); e amohelehang feela bakeng sa lits'ebetso tsa maemo a tlase moo theko e leng eona ntho e ka sehloohong.

2) Mokhoa oa An (Ts'ebetso ea An)

Kakaretso ea ts'ebetso: ts'ebetso e tsoetseng pele eo ka tloaelo e sebetsang haufi le khatello ea sepakapaka, ha e hloke ho kenya mocheso o kantle ho litlhophiso tse ling, 'me e na le tšebeliso e tlase ea motlakase; leha ho le joalo, hangata e hloka mecha ea phatlalatso ea catalytic e khethehileng le litšenyehelo tsa catalyst li ka ba holimo.
Boleng bo tloaelehileng ba sehlahisoa:

• Ho hloeka: mahareng ho isa hodimo mme a batla a tsitsitse ka taolo e ntle ya tshebetso.

• Litšila tsa 'mele / sebabole: ka kakaretso e tlase haeba li-feedstock le li-control li hloekile.

• Litšepe tse boima: e laolehang ka phepelo le tlhoekiso ya noka.

• Mongobo / botsitso: e ka finyella mongobo o tlaase le botsitso bo botle ba polokelo ka ho omisa ka ho lekaneng.

• Foromo: e ka hlahisoa e le li-flakes, granules kapa phofo e nang le boholo bo lekanang.
  Ho tšoaneleha ho theoha: e loketseng bakeng sa merafo (leaching), electroplating ea indasteri le lisebelisoa tse ngata tse ntle tsa lik'hemik'hale; e ka hloka tlhoekiso e eketsehileng bakeng sa tšebeliso ea meriana.

3) Mokhoa oa ho petsoha ka oli e bobebe

Kakaretso ea ts'ebetso: e sebelisa oli e phatlohileng kapa likhase tsa sebōpi e le fepa ho hlahisa li-intermediate tsa cyanide; hangata e se na catalyst le mamello ea lijo tsa maemo a tlase. Phekolo ea khase ea mohatla e rarahane.
Boleng bo tloaelehileng ba sehlahisoa:

• Ho hloeka: e itekanetseng; e itshetlehileng ka tlhoekiso ya melapo e phatlohileng.

• Mesaletsa ea lintho tse phelang: mesaletsa e ka khonehang ea manyolo ho tloha ho petsoha-e hloka ho hlatsoa ka matla le ho arohana.

• Sebabole: hangata e tlase haeba lihlahisoa tsa lijo li senyehile; maemo a itseng a ka hlahisa mefuta ea sebabole.

• Litšepe tse boima: hangata ha e phahame empa e itšetlehile ka lijo le lisebelisoa.

• Mongobo / botsitso: e laolehang ka ho omisa hantle, empa ho omisa hampe ho lebisa ho kaka.

• Foromo: phofo kapa granules tse nang le kabo e pharalletseng ea boholo ba karoloana.
  Ho tšoaneleha ho theoha: e sebelisoang haholo bakeng sa leaching ea merafo le electroplating ka kakaretso; tlhoekiso e eketsehileng e hlokahalang bakeng sa ts'ebeliso e ntle ea lik'hemik'hale tsa organic-sensitive.

4) Methanol-ammoniation mokhoa (methanol-ammonia)

Kakaretso ea ts'ebetso: e sebelisa methanol le ammonia e le li-feedstocks tsa mantlha ho hlahisa li-intermediate tsa cyanide, hangata tlas'a maemo a bohloko. Tsela ena e amohetsoe haholo hobane methanol ke sejo se seng se holile, se fumanehang hohle. E fana ka ts'ebetso e phahameng ea ho sokoloha le tšebeliso e tlase ea matla.
Boleng bo tloaelehileng ba sehlahisoa:

• Ho hloeka: ka kakaretso e phahameng ebile e tsitsitse tlasa taolo e nepahetseng ea ts'ebetso.

• Litšila tsa 'mele: tlase ha mekhahlelo ea karohano le ho hlatsoa li entsoe hantle.

• Sebabole: tlase (liphepelo tse hloekileng tsa methanol/ammonia).

• Litšepe tse boima: e laolehang maemong a tlase ka taolo ya thepa le phepo.

• Mongobo / botsitso: mongobo o tlase le litšoaneleho tse ntle tsa anti-caking ka mor'a ho phekoloa hantle ka morao.

• Foromo: e ka hlahisa li-flakes tsa boleng bo holimo kapa li-granules tse loketseng thekiso ea khoebo.
  Ho tšoaneleha ho theoha: e sebetsang ka ho pharaletseng - e ntle haholo bakeng sa leaching ea merafo (ho hlaphoheloa holimo), electroplating le lik'hemik'hale tse ngata tse ntle tsa lik'hemik'hale; khetho ea tlholisano bakeng sa libaka tse nang le phepelo e tsitsitseng ea methanol/ammonia.

5) Acrylonitrile co-product (ka-sehlahisoa) ho hlaphoheloa

Kakaretso ea ts'ebetso: sodium cyanide e fumanoa e le sehlahisoa se kopanetsoeng ho tloha lits'ebetsong tsa tlhahiso ea acrylonitrile; ena ke tsela ea moruo ha e kopantsoe le tlhahiso ea acrylonitrile.
Boleng bo tloaelehileng ba sehlahisoa:

• Ho hloeka: e phahameng le e tsitsitseng; molemo o mong o moholo ke sebabole se tlase haholo.

• Litšila tsa 'mele: e tlase ka lebaka la litsamaiso tse thehiloeng tsa karohano / tsa ho hlaphoheloa.

• Sebabole: hangata tlase haholo - molemo oa bohlokoa.

• Litšepe tse boima: hangata e tlase ho ipapisitse le taolo e holimo.

• Mongobo / botsitso: e ntle - mongobo o tlase o ka fihlellehang ka ts'ebetso e tloaelehileng.

• Foromo: libopeho tse tloaelehileng tsa khoebo joalo ka li-flakes kapa granules tse nang le ponahalo e khahlang le botsitso.
  Ho tšoaneleha ho theoha: e loketseng haholo bakeng sa leaching ea merafo le lits'ebetso tse tsotellang litšila; bophahamo ba tlhahiso, leha ho le joalo, bo itšetlehile ka ts'ebetso ea semela sa acrylonitrile 'me ka hona e tlameletsoe ho fumaneha ha lihlahisoa tse kopanetsoeng.

Hlokomela: likakaretso tse ka holimo tsa boleng ba sehlahisoa ke kakaretso ea indasteri ea boemo bo holimo. Lipalo tsa 'nete tsa boleng li ipapisitse le boleng ba feedstock, taolo ea ts'ebetso le mehato ea ho hloekisa/ho omisa/ho paka. Bakeng sa litlhaloso kapa theko, kamehla u hloka Setifikeiti sa Tlhahlobo (COA).

3. Metrics ea bohlokoa ea boleng le hore na e ama ts'ebeliso e tlase joang

Tsena ke lihlopha tsa phumants'o tsa boleng bo tloaelehileng 'me basebelisi ba tlameha ho etelletsa pele le ho etsa liteko ho COAs:

• Litaba tsa NaCN (% w/w): e khetha tekanyo e sebetsang ea cyanide le ts'ebetso ea leaching.

• Cyanide ea mahala / cyanide e qhibilihang: e ama reactivity le ts'ireletso ea ts'ireletso.

• Mongobo (%): e ama botsitso ba polokelo le ho tsamaisa thepa (mongobo o phahameng → ho baka).

• Alkali e qhibilihang (mohlala, NaOH) / alkalinity ea mahala: e fetola pH ea tharollo mme e ka susumetsa k'hemistri ea leaching.

• Mefuta ea sebabole / sulfate / chloride: ditshila tse itseng di ama dintho tse senyehileng hampe.

• Mesaletsa ea lintho tse phelang: Li-organic li ka sebelisa cyanide ka litlatsetso tse lehlakoreng, tsa fokotsa ho ba teng ha cyan bakeng sa leaching.

• Limetale tse boima (Pb, Hg, Cd, joalo-joalo): bohlokoa bakeng sa tšebeliso ea meriana / e ntle ea lik'hemik'hale le ho lumellana le tikoloho.

• Boholo ba likarolo le sebopeho (flake / pellet / phofo): e susumetsa sekhahla sa ho qhalana, ho nolofalloa ha tekanyo ea litekanyetso le boitšoaro ba lipalangoang.

Mehlala ea litlamorao tse tlase:

• Leaching ea khauta: e khetha NaCN e phahameng, lintho tse phelang tse tlase le alkalinity e laoloang bakeng sa ho hlaphoheloa hantle.

• Electroplating: e nahanela sebabole le litšepe tse boima; e tšoanang, cyanide e hloekileng e khethoa.

• Pharma / lik'hemik'hale tse ntle: li hloka meeli e thata ka ho fetisisa ea tšepe e boima le ea manyolo - hangata e hloka tlhoekiso e eketsehileng.

4. Tafole ea papiso ea boleng bo phahameng

Tafole ke tšupiso e akaretsang ea indasteri. Kamehla netefatsa COA ea sehlahisoa 'me u etse liteko sebakeng sa marang-rang bakeng sa lits'ebetso tsa bohlokoa.

5. Papiso ea ts'ebetso - litekanyo tsa bohlokoa (kakaretso)

• Boemo ba tikoloho / tlhahiso: fusion/smelting > light-oil cracking / Mokhoa oa An > methanol–ammoniation ≈ acrylonitrile co-product (">" e bolela "moroalo o moholo oa tikoloho").

• Tšebeliso ea matla le litšenyehelo tsa ts'ebetso: fusion le ho petsoha ha oli e bobebe ho atisa ho ba matla haholoanyane; Tlhahiso e kopanetsoeng ea methanol–ammoniation le acrylonitrile hangata e bontša melemo ea litšenyehelo ha lihlahisoa tsa lijo li rekoa hantle.

• Ho feto-fetoha ha tlhahiso: methanol–ammoniation le mokhoa oa An li fana ka taolo e ikemetseng e ikemetseng ea matla a tlhahiso; co-product (acrylonitrile recovery) e tlameletsoe ho sehlahisoa sa semela sa acrylonitrile.

• Polokeho le boiketsetso: An's le methanol–ammoniation ha li bapisoa le ts'ebetso ea mocheso o tlase le li-automation tse phahameng; ho petsoha ha oli e bobebe le ho kopanngoa ho hloka taolo e thata haholoanyane ea mohatla le litaolo tsa polokeho ea mocheso o phahameng.

6. Ketane ea boleng ba indasteri (ho ea holimo - bohareng - tlase ho noka)

Upstream - thepa e tala & thepa

• Lisebelisoa tsa mantlha: soda ash (Na₂CO₃), liquid ammonia (NH₃), methanol (CH₃OH), urea, caustic solutions, oli e khanyang le tse ling ho itšetlehile ka khetho ea ts'ebetso.

• Lisebelisoa le litšebeletso tse kholo: li-reactors, li-distillation le likarolo tsa karohano, litanka tsa polokelo, mekhoa ea phekolo ea khase ea mohatla, litsamaiso tsa tlhokomelo le polokeho, le bo-rakonteraka ba EPC (ea boenjiniere, thepa le kaho) le bafani ba liphallelo.

• Barupeluoa: phepelo ea lijo (methanol, ammonia, refiners), baetsi ba lisebelisoa, bahlahisi ba li-catalyst, lifeme tsa boenjiniere.

Midstream - tlhahiso, taolo ea boleng le khoebo

• mesebetsi: tlhahiso (litsela tse fapaneng tsa ts'ebetso), ho hlopha lihlahisoa le ho paka (li-flakes, li-pellets, phofo; lihlahisoa tse tloaelehileng tsa khoebo tse kang 98% NaCN), tlhahlobo le setifikeiti sa motho oa boraro, kabo le khoebo ea machaba.

• Mathata a mantlha: theko ea thepa e tala, ho latela tikoloho, ho itokisetsa maemo a tšohanyetso, ho paka thepa e kotsi le thepa.

Tlas'a maemo a tlase - litšebeliso le bareki

• Limmaraka tse kholo: tšepe leaching (khauta le litšepe tse ling tsa bohlokoa - ts'ebeliso e kholo ka ho fetisisa ea molumo), electroplating, pharmaceutical and fine-chemical intermediates, agrochemical synthesis, flotation additives le laboratory reagents.

• Litlhoko tsa bareki: maemo a phahameng a ho tšepahala ha phepelo, boleng bo tsitsitseng le ho sebetsana le thepa e kotsi; merero ea merafo ka ho khetheha e hloka nako le litokomane tse ka lebelloang.

7. Khoebo ea machaba le mekhoa ea ho romela thepa (setšoantšo sa indasteri)

• Tsela e akaretsang: haesale ho tloha ha China e buloa moruong, naha ena e tsoetse pele ho tloha ho tsoa kantle ho sodium-cyanide ho ea ho e mong oa bahlahisi le barekisi ba kholo ka ho fetisisa lefatšeng. Li-export ho ea Latin America, Afrika, Oceania, Asia Bohareng le Asia Boroa-bochabela li eketsehile lilemong tsa morao tjena. Litšitiso tsa tlhahiso ea mose ho maoatle (mohlala, litlamorao tsa mehla ea seoa) hangata li ekelitse tlhoko ea barekisi ba China.

• Boitsebiso ba moemeli: ka 2024, lihlahisoa tsa China tsa sodium cyanide li ne li batla li lekana Li-tonne tse 216,000 (21.6 ×10⁴ t), holimo 12.03% selemo le selemo, ka boleng ba kantle ho naha USD 454 limilione, hodimo 1.34% selemo le selemo.

• Libaka tse kholo: Afrika, Amerika Boroa, Russia, Asia Bophirima le Asia Boroa-bochabela. Linaha tse kang Russia, Peru, Zimbabwe, Mexico, Niger, Turkey le Burkina Faso hammoho li ile tsa ikarabella bakeng sa hoo e ka bang. 57.15% ya diyantle, mme ditikoloho tse ding di arolelana se setseng.

• Bakhanni ba 'maraka: katoloso ea merafo ea khauta, kholo ea liindasteri tsa agrochemical/fine-chemical mose ho maoatle le litšenyehelo tse lekanyelitsoeng le melemo ea bokhoni ba bahlahisi ba Machaena.

• Likotsi tsa khoebo: melao ea lipalangoang tsa thepa e kotsi, litlhoko tsa tikoloho kapa polokeho ea naha eo u eang ho eona, litšitiso tsa tikoloho le tsamaiso, lichelete le likotsi tsa tefo.

8. Likotsi tsa indasteri, lintho tse tlang pele ho latela melao le likhothaletso bakeng sa likhoebo

1. Beha pele polokeho le tikoloho: tsetela ho hloekisoa ka khase e matla ea mohatla le ea metsi a litšila, ho lemoha ha metsi a lutla, karabelo ea tšohanyetso le puisano ea sechaba ho fokotsa kotsi ea likotsi le taolo.

2. Sireletsa phepelo ea lintho tse tala: theha likonteraka tsa nako e telele kapa litšebelisano tsa maano le methanol, ammonia le bafani ba bang ba bohlokoa ho tsitsisa litšenyehelo le phepelo.

3. Khetha mokhoa oa ho sebetsa ho latela maemo a sebaka: khetha litsela tsa tlhahiso tse ipapisitseng le ho fumaneha ha li-feedstock, litjeho tsa matla, taolo ea tikoloho le boleng bo lakatsehang ba sehlahisoa.

4. Limmaraka le litšebeletso tse fapaneng: atolosa limmaraka (mohlala, li-intermediate tsa agrochemical, electroplating, lab reagents) le ho fana ka tšehetso ea tekheniki, koetliso ea polokeho sebakeng sa marang-rang le lits'ebeletso tse kotsi tsa thepa ho eketsa ho boloka bareki.

5. Netefaletso ea boleng: hloka Litifikeiti tsa Analysis, batch traceability le ho sebelisana le lilaboratori tse ngolisitsoeng ka molao; bakeng sa likopo tse phahameng tse fanang ka tlhoekiso e eketsehileng kapa litiisetso tsa bespoke tsa QC.

6. Tumellano ea ho romella kantle ho naha: hlokomela haufi-ufi melao ea machaba ea lipalangoang le ho reka kantle ho naha bakeng sa li-cyanides le ho kenya ts'ebetsong litokomane tse matla, ho paka le ho hlahloba thepa ho qoba tieho ea thomello kapa ho hana.

Qetello - United Chemical' boitlamo

United Chemical hlokomela seo tlhahiso ea sodium cyanide 'me khoebo ha e jare boleng ba khoebo feela empa hape e na le boikarabello bo boholo. Re itlama ho:

• ho amohela litsela tse hloekileng, tse tsitsitseng tsa tlhahiso le ho tsoela pele ho ntlafatsa ts'ebetso ea matla le taolo ea mesi;

• ho qobella tlhahlobo e matla ea boleng, taolo ea thepa e kotsi le litokomane tsa bareki;

• ho fana ka libopeho tse hlophisitsoeng, tšehetso ea tekheniki le tataiso ea ho latela melao ho balekane ba lefats'e;

• ho netefatsa liketane tsa phepelo tse tšepahalang ha re ntse re ts'ehetsa polokeho le tlhokomelo ea tikoloho.

Bakeng sa lipotso mabapi le litlhaloso, li-COA, liphutheloana le litokomane tsa taolo, kapa ho kopa tšehetso ea tekheniki le koetliso ea ho sebetsana ka mokhoa o sireletsehileng, ka kopo ikopanye le United Chemical ka webosaete ea rona ea semmuso kapa liofisi tsa thekiso ea libaka. United Chemical e lebeletse ka thabo ho sebelisana le bareki ba lefats'e ba merafo le lik'hemik'hale mabapi le litharollo tsa phepelo tse bolokehileng, tse lumellanang le tsa boleng bo holimo.