Daim ntawv thov teb thiab qhov tseem ceeb ntawm sodium cyanide

Introduction

Sodium cyanide (NaCN), yog ib hom hmoov dawb crystalline, yog ib yam tshuaj lom heev tab sis tseem ceeb heev. Txawm hais tias nws ua rau tuag taus, nws ua lub luag haujlwm tseem ceeb hauv ntau yam lag luam vim nws cov khoom siv tshuaj lom neeg tshwj xeeb. Tsab xov xwm no tshawb nrhiav txog ntau yam kev siv sodium cyanide thiab qhia txog nws qhov tseem ceeb.

Cyanide Mining: Extracting Precious Hlau

Kub Cyanidation txheej txheem

Kev siv cyanide los ua kub, tseem hu ua cyanide process, yog txoj kev siv dav tshaj plaws los rho kub ntawm cov ores qis. Ntau tshaj 70% ntawm kev siv cyanide thoob ntiaj teb yog siv rau lub hom phiaj no. Hauv txoj kev no, Sodium Cyanide siv los yaj cov hlau kub. Ua tsaug rau qhov sib raug zoo ntawm kub thiab cyanide, kub hauv cov ore oxidizes thiab yaj thaum raug cua, oxygen, thiab dej. Txoj kev no tso cai rau kev rho kub ntawm cov ores uas yuav tsis yooj yim rau kev ua, uas ua rau muaj kev pabcuam kub thoob ntiaj teb.

Nyiaj thiab lwm yam Precious hlau Extraction

Sodium cyanide tsis txwv rau kev rho tawm kub. Nws kuj tseem siv rau hauv kev rho tawm ntawm cov nyiaj thiab lwm yam hlau muaj txiaj ntsig los ntawm lawv cov ores. Los ntawm kev tsim cov hlau ruaj khov - cyanide complexes, nws tso cai rau kev sib cais ntawm cov hlau tseem ceeb ntawm cov pob zeb tswv. Qhov no yog qhov tseem ceeb rau kev lag luam mining vim nws pab txhawb kev rov qab los ntawm cov hlau muaj txiaj ntsig thiab txhim kho kev lag luam ntawm kev lag luam mining.

Chemical Feedstock: Tsev Blocks rau Chemical Compounds

Synthesis ntawm Inorganic Cyanides

Sodium cyanide ua haujlwm ua cov khoom siv raw tseem ceeb rau kev tsim ntau yam inorganic cyanides . Cov tshuaj xws li cyanuric chloride, cyanogen chloride, thiab ntau yam nitriles yog los ntawm nws. Piv txwv li, cyanuric chloride yog ib qho tseem ceeb hauv kev tsim cov tshuaj tua kab, tshuaj tua kab, thiab ntau hom polymers. Lub peev xwm los tsim cov inorganic Cyanides no los ntawm Sodium cyanide tsim lub hauv paus rau ntau yam khoom siv tshuaj lom neeg.

Organic Synthesis

Nyob rau hauv cov organic synthesis, cyanide, raws li ib tug muaj zog nucleophile, yog siv los npaj nitriles. Nitriles yog dav nyob rau hauv ntau yam tshuaj, nrog rau cov tshuaj. Ib qho piv txwv piv txwv yog kev sib txuas ntawm benzyl cyanide los ntawm cov tshuaj tiv thaiv ntawm benzyl chloride thiab sodium cyanide. Cov tshuaj tiv thaiv no yog cov kauj ruam tseem ceeb hauv kev sib txuas ntawm ntau cov organic tebchaw, qhia txog qhov tseem ceeb ntawm sodium cyanide hauv thaj chaw ntawm cov organic chemistry. Lub synthesis ntawm ntau yam tshuaj, flavors, thiab fragrances feem ntau cia siab rau siv cov nitriles npaj los ntawm sodium cyanide.

Electroplating: Txhim kho hlau nto

Hauv kev lag luam electroplating, sodium cyanide plays lub luag haujlwm ntau yam. Thaum siv cov tshuaj electroplating rau cov hlau xws li tooj liab, nyiaj, cadmium, thiab zinc, nws ua haujlwm ntau yam. Ua ntej, nws txo cov anodic polarization, kom ntseeg tau tias du thiab nruam dissolution ntawm lub anode. Qhov no yuav pab tswj kom muaj kev ruaj ntseg ntawm cov hlau ions hauv cov tshuaj plating. Qhov thib ob, nws ua kom cov cathodic polarization, uas yog ib qho tseem ceeb heev kom tau txais ib qho kev sib xws thiab ua raws cov hlau txheej ntawm cathode. Kev siv cov sodium cyanide hauv electroplating tso cai rau kev tsim cov hlau zoo ua tiav nrog kev txhim kho corrosion, zoo li, thiab kav ntev. Qhov no yog qhov tseem ceeb rau ntau yam kev siv, los ntawm cov hniav plating hauv cov hniav nyiaj hniav kub thiab cov khoom siv rau kev ua haujlwm plating hauv kev lag luam automotive thiab aerospace.

Lwm Cov Kev Siv Niche

Hlau Hardening

Sodium cyanide siv rau hauv kev lag luam ua kom tawv hlau. Hauv qee cov txheej txheem kho cua sov, nws tuaj yeem siv los qhia Carbon thiab nitrogen rau hauv qhov chaw ntawm cov khoom siv hlau. Cov txheej txheem no, hu ua cyaniding, txhim kho qhov tawv ntawm qhov chaw thiab kev hnav tsis kam ntawm cov hlau thaum tswj nws cov tawv hauv lub plawv. Cov khoom xws li iav, shafts, thiab fasteners tuaj yeem kho tau li no los txhim kho lawv cov kev ua tau zoo thiab lub neej ntev hauv kev siv tshuab.

Fumigation

Hauv qee daim ntawv thov kev ua liaj ua teb thiab khaws cia, sodium cyanide tau siv los ua fumigant. Vim nws muaj peev xwm tso tawm cov roj hydrogen cyanide, uas yog tshuaj lom rau cov kab tsuag, nws tuaj yeem siv los tswj cov kab, nas, thiab lwm yam kab tsuag hauv cov nplej, warehouses, thiab tsev cog khoom. Txawm li cas los xij, nws txoj kev siv hauv fumigation yog kev tswj hwm zoo vim nws qhov hnyav hnyav thiab muaj peev xwm ua rau muaj kev phom sij rau ib puag ncig thiab kev noj qab haus huv.

Qhov tseem ceeb ntawm Sodium Cyanide

Sodium cyanide qhov tseem ceeb hauv cov kev lag luam no tsis tuaj yeem hais ntau dhau. Hauv kev lag luam mining, nws tso cai rau kev rho tawm cov hlau muaj txiaj ntsig uas yog qhov tseem ceeb rau kev lag luam thoob ntiaj teb, kev lag luam hniav nyiaj hniav kub, thiab kev nce qib thev naus laus zis. Hauv kev lag luam chemical, nws ua haujlwm tseem ceeb hauv lub tsev thaiv rau suav tsis txheeb cov tshuaj sib xyaw uas siv rau hauv cov tshuaj, plastics, fibers, thiab ntau lwm yam khoom siv thiab kev lag luam. Hauv electroplating, nws ua kom muaj cov khoom siv hlau zoo uas tiv thaiv thiab txhim kho kev ua haujlwm ntawm cov khoom hlau. Txawm tias nyob rau hauv nws daim ntawv thov niche xws li hlau hardening thiab fumigation, nws muab cov kev daws teeb meem uas nyuaj los hloov nrog lwm yam tshuaj.

Txawm li cas los xij, nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias kev tuav, khaws cia, thiab pov tseg ntawm sodium cyanide yuav tsum tau ua nrog kev saib xyuas hnyav vim tias nws muaj toxicity siab. Cov cai tswj kev nyab xeeb nruj thiab kev cob qhia kom raug yog qhov tseem ceeb los txo qhov kev pheej hmoo cuam tshuam nrog cov tshuaj no. Txawm tias muaj kev pheej hmoo, nws qhov tseem ceeb hauv ntau cov txheej txheem kev lag luam ua rau nws muaj cov tshuaj muaj txiaj ntsig zoo thiab kev kawm txuas ntxiv.