I-Methylene Chloride (MC), isinyibilikisi esisetyenziswa ngeendlela ezininzi esisetyenziswa kakhulu kwiimveliso zamayeza, izincamathelisi, kunye neefomyula ze-aerosol, itshintsha kakhulu kwizicelo zayo zoshishino kunye nemeko yolawulo. Uphuhliso lwakutshanje ekusebenzeni kakuhle kwemveliso, iinkqubo zokhuseleko lokusingqongileyo, kunye nophando lwezinye izinyibilikisi luyayila ngokutsha indlela le khemikhali ebonwa kwaye isetyenziswa ngayo kwiikhonkco zobonelelo zehlabathi.
1. Uphuhliso kwiiNkqubo zokuRisayikilisha eziValiweyo
Indlela entsha yokubuyisela nokusebenzisa kwakhona i-dichloromethane kwiinkqubo zokuvelisa ifumene ukuthandwa ngo-2023. Le nkqubo yaphuhliswa liqumrhu lophando laseYurophu, isebenzisa ubuchwepheshe obuphambili bokufunxa ukuze ibambe kwaye icoce umphunga we-MC okhutshwa ngexesha lokuveliswa kwengubo. Izilingo zokuqala zibonisa izinga lokubuyisela eliyi-92%, nto leyo enciphisa kakhulu ukusetyenziswa kwezinto eziluhlaza kunye nokukhutshwa kwazo.
Le teknoloji idibanisa ukubeka esweni okuqhutywa yi-AI ukuze kuphuculwe imijikelo yokusetyenziswa kwakhona kwe-solvent, ukuqinisekisa ukuthotyelwa kwemida engqongqo yokuvezwa kwindawo yokusebenza. Amashishini afana nokuvelisa i-polycarbonate kunye nokucoca izinto ze-elektroniki ayayivavanya le nkqubo, ehambelana neenjongo zoqoqosho olujikelezayo lweBhunga leMibutho yeeKhemikhali leHlabathi (ICCA) lika-2030.
2. Ukuqinisa iMimiselo yeHlabathi kwi-MC Emissions
Imibutho elawulayo iqinisa ukuphononongwa kweMethylene Chloride ngenxa yamandla ayo okuphela kwe-ozone (ODP) kunye nemingcipheko yempilo emsebenzini. NgoSeptemba 2023, i-European Chemicals Agency (ECHA) icebise izilungiso kwimigaqo ye-REACH, iyalela ukuba kulandelwe ukukhutshwa komoya ngexesha langempela kwizakhiwo ezisebenzisa ngaphezulu kweetoni ezingama-50 ze-MC ngonyaka. Imithetho ikwafuna uvavanyo lokutshintshwa kwezicelo ezingabalulekanga ngaphambi kwekota yesibini ka-2024.
Kwangaxeshanye, i-US Environmental Protection Agency (EPA) iqalise uphononongo lwesimo se-MC phantsi koMthetho woLawulo lweZinto ezinobungozi (TSCA), apho iziphumo zokuqala zibonisa ukuba imida yoxinzelelo olungqongqo kwindawo yokusebenza emoyeni—okunokunciphisa umda ukusuka kwi-25 ppm ukuya kwi-10 ppm. La manyathelo ajolise ekusombululeni iingxaki ezikhulayo malunga nemiphumo ye-neurological yexesha elide phakathi kwabasebenzi bemizi-mveliso.
3. Icandelo leMithi lisebenzisa iindlela eziluhlaza
Ishishini lamayeza, elililungu eliphambili leMethylene Chloride yokwenza i-crystallization kunye ne-extract yamayeza, likhawulezisa uvavanyo lwe-bio-based solvents. Uphononongo oluphononongwe ngontanga olupapashwe kwi *Green Chemistry* (Agasti 2023) lugxininise i-limonene-derived solvents njenge-MC replacement esebenzayo kwi-API (active pharmaceutical ingredient) synthesis, lufezekisa isivuno esifanayo kunye ne-80% yeprofayili yetyhefu ephantsi.
Nangona ukwamkelwa kwemveliso kuqhubeka ngokwanda ngenxa yemingeni yozinzo kwimveliso, izibonelelo zomthetho phantsi koMthetho woKuncitshiswa kwamaxabiso e-US zixhasa izityalo zovavanyo ezizinikele ekukhuliseni ezi ndlela. Abahlalutyi baqikelela ukuba imfuno ye-MC evela kwimithi iza kuncitshiswa nge-15-20% ngo-2027 ukuba iindlela zangoku zophando nophuhliso ziyaqhubeka.
4. Inkqubela phambili kwiTekhnoloji yokunciphisa umngcipheko we-MC
Ulawulo lobunjineli obutsha lunciphisa iingozi ezinxulumene ne-MC. Iqela lophando laseMntla Melika kutshanje lityhile inkqubo yokucoca esekwe kwi-nanoparticle ebolisa i-MC eseleyo kwimijelo yamanzi amdaka ibe yimveliso engeyiyo ityhefu efana nee-ion ze-chloride kunye ne-carbon dioxide. Inkqubo ye-photocatalytic, esebenza ngokukhanya kwe-UV okungenamandla aphantsi, ifikelela kwi-99.6% yokusebenza kakuhle kokubola kwaye idibaniswa nezibonelelo zonyango lwamanzi amdaka ekhemikhali.
Ukongeza, izixhobo zokuzikhusela zomntu zesizukulwana esilandelayo (i-PPE) ezinee-respirators eziphuculweyo ze-graphene zibonakalise ukusebenza kakuhle kwe-98% ekuthinteleni umphunga we-MC ngexesha lemisebenzi yokuvezwa okuphezulu njengokususa ipeyinti. Olu phuhliso luhambelana nezikhokelo ze-OSHA ezihlaziyiweyo ezigxininisa kulawulo lokuvezwa olunezigaba kubaphathi be-MC.
5. Utshintsho lweMarike oluqhutywa kukuzinza
Nangona indima yayo igxile kakhulu, iMethylene Chloride ijongene noxinzelelo olukhulu oluvela kwiikhrayitheriya zotyalo-mali ze-ESG (ezendalo, ezentlalo, nezolawulo). Uphando luka-2023 olwenziwe ngumhlalutyi ophambili kushishino lweekhemikhali lutyhile ukuba ama-68% abavelisi abasezantsi ngoku babeka phambili abathengisi ngezicwangciso zokunciphisa ukukhutshwa kwe-MC eziqinisekisiweyo. Olu hlobo lukhuthaza ubuchule kwiziseko zokubuyisela i-solvent kunye neendlela zokuvelisa i-bio-hybrid.
Okuphawulekayo kukuba, iprojekthi yovavanyo eMzantsi-mpuma Asia iphumelele ekuveliseni i-MC kusetyenziswa i-methane chlorination exhaswa ngamandla avuselelekayo, yanciphisa umlinganiselo wekhabhoni kwimveliso ngama-40%. Nangona imingeni yokukhula isaqhubeka, la maphulo agxininisa ukujikeleza kwecandelo leekhemikhali ukuya kwiindawo ezinyibilikisa i-carbonized solvent ecosystems.
Isiphelo: Ukulinganisela Uncedo kunye noxanduva
Njengoko iMethylene Chloride isabalulekile kwizicelo ezibalulekileyo, ingqwalasela yoshishino ekuveliseni izinto ezintsha ezizinzileyo kunye nokuthotyelwa kwemithetho iya isanda. Ukusebenzisana kweenkqubo zokubuyisela izinto ezisemgangathweni, ezinye iindlela ezikhuselekileyo, kunye nemigaqo-nkqubo eguqukayo kuya kuchaza indima ye-MC kwikamva elingenakhabhoni eninzi. Abachaphazelekayo kulo lonke uthotho lwexabiso kufuneka ngoku bahambe kweli nqanaba lotshintsho—apho ukusebenza kakuhle kunye nolawulo lokusingqongileyo kuhlangana khona—ukuze bafumane ithuba lokuphila ixesha elide.
Ixesha leposi: Epreli-07-2025