Ukubuka Konke Komkhiqizo
I-Dichloromethane (DCM), enefomula yamakhemikhali i-CH₂Cl₂, iyi-hydrocarbon engenambala, esobala, eguquguqukayo enephunga elimnandi elincane. Njengesinyibilikisi esibalulekile sezimboni, i-DCM inendawo ehlukile ekukhiqizweni kwamakhemikhali nasekucutshungulweni kwayo ngenxa yokuthambekela kwayo okunamandla, ubuthi obuphansi kanye nokungashi (uma kuqhathaniswa namanye ama-hydrocarbon ane-chlorine). Ingancibilikisa ngempumelelo izinto ezahlukahlukene eziphilayo ezifana namafutha, ama-resins, ama-raber kanye nama-cellulose esters. Okwamanje, ine-miscibility ephansi kakhulu ngamanzi kanye ne-bolling point ephakathi nendawo (39.8℃), okwenza kube lula ukuyibuyisa ngokuyihluza.
Ekukhiqizweni kwezimboni, i-DCM isetshenziswa kakhulu njengesisusi sopende, i-ejenti yokuhlanza insimbi kanye ne-ejenti yokufutha (isb., ekukhiqizweni kwe-polyurethane foam). Iphinde isebenze njengesinyibilikisi sokusabela kanye ne-extractant ekuhlanganisweni kwemithi kanye nezibulala-zinambuzane, kanye nesinyibilikisi ekukhiqizweni kwamafilimu. Ngaphezu kwalokho, i-DCM yake yasetshenziswa ekukhipheni i-caffeine embonini yokudla, kodwa ukusetshenziswa kwayo kulo mkhakha kuye kwavinjelwa noma kwashintshwa ngenxa yezimpikiswano zokuphepha.
Intuthuko Yamuva Yemboni
Muva nje, izinqubomgomo zomthetho ku-DCM sezibe yinto egxile emhlabeni wonke. Ekuqaleni kuka-2024, i-European Chemicals Agency (ECHA) iphakamise ukufaka i-DCM ohlwini lwemikhawulo eqinile ngokusekelwe ekuhlolweni kwayo kwezingozi zempilo emsebenzini, okungase kuqinise kakhulu imikhawulo yokuchayeka emsebenzini kwe-DCM ezindaweni zezimboni. Lokhu kuthuthukiswa kudonsele ukunaka okukhulu kubasebenzisi baseYurophu abasezansi, abahlola izindleko zezixazululo ezihlukile noma izinyathelo zokulawula ubunjiniyela eziqinile.
EShayina, uMnyango Wezemvelo Nezemvelo uqhubeke nokufaka i-DCM ohlwini lwamakhemikhali ayingozi ngaphansi kokuphathwa okubalulekile kwemvelo, futhi ukhuthaza ukunciphisa ukukhishwa kwe-Volatile Organic Compounds (VOCs) ngesikhathi sokukhiqizwa nokusetshenziswa kwayo. Abanye ohulumeni basekhaya bakhiphe izinqubomgomo ezikhuthaza ukunciphisa noma ukuqeda i-DCM emikhakheni lapho kunezinye izindlela ezitholakalayo, njengokuhlanza nokususa upende, okushukumise amabhizinisi afanele ukuba asheshise ukuguqulwa kobuchwepheshe.
Ngokuphathelene nokunikezwa kwemakethe, engxenyeni yokuqala ka-2024, ukunikezwa kwe-DCM yomhlaba wonke kwakunciphile futhi amanani akhuphuka ngezikhathi ezithile ngenxa yokushintshashintsha embonini ye-chlor-alkali ephezulu kanye nokugcinwa kwezitshalo kwezinye izifunda zase-Asia. Kodwa-ke, ngokukhululwa kancane kancane kwamandla amasha okukhiqiza (ikakhulukazi e-China), ukunikezwa kwemakethe kanye nesidingo kulindeleke ukuthi kuqhubekele ebhalansini.
Kuvele izimpawu ezinhle emkhakheni wezobuchwepheshe: uhlelo lokubuyisa nokuhlanza i-DCM olusebenza kahle kakhulu olusekelwe ezintweni ezintsha ezimuncayo lufakwe ekuhlolweni kokusebenza kwezentengiselwano eJalimane. Uhlelo luthi luphakamisa izinga lokubuyisa i-DCM kusuka enkambisweni yezimboni ngaphandle kwegesi liye ngaphezu kuka-99% futhi luyivuselele ibe yisithambisi esiphinde sisetshenziswe esihlanzekile kakhulu, okuhlinzeka ngethuluzi elisha lokunciphisa ukukhishwa kwemvelo kanye nezindleko zokusebenza.
Ukuhlaziywa Kwendlela Yomkhakha
Uma sibheka phambili, imboni ye-DCM izobhekana nesimo esiyinkimbinkimbi sokuphishekela intuthuko esimeme ngaphansi komthethonqubo oqinile, kanye nalezi zindlela ezilandelayo ezibalulekile:
Ukudonsisana Okude Phakathi Komthethonqubo Nokuthembela
Esikhathini esizayo esibonakalayo, imithethonqubo yezempilo kanye nemvelo yomhlaba wonke ku-DCM izoqiniswa kuphela, hhayi ukukhululeka. Ukuguquguquka kwayo, ubuthi obungaba khona bemizwa kanye nemiphumela yemvelo—nakuba ingalimazi ngqo ungqimba lwe-ozone—kuzoyigcina igxile ezinqubweni zemvelo. Noma kunjalo, ngenxa yokuntuleka kwesikhashana kwezindlela ezingabizi kakhulu, ezihambisana nokusebenza kahle neziphephile emikhakheni ethile ethile (njengokuhlanganiswa kwezinye izidakamizwa zemithi ezisezingeni eliphezulu kanye nokuhlanza ngogesi okunembile), i-DCM izoqhubeka nokuba khona ngaphansi kohlaka lokusetshenziswa okulawulwayo kunokuba kuvinjelwe ngokuphelele.
Ukuhlukaniswa Okusheshayo Nokufaka Esikhundleni Kuzo Zonke Izinkambu Zohlelo Lokusebenza
Emasimini anemikhawulo yobuchwepheshe ephansi kakhulu kanye nezixazululo ezivuthiwe, njengokususwa kopende kanye nokuhlanza ezinye izinhlelo zokusebenza, isabelo semakethe se-DCM sizoshintshwa ngokushesha yizinto zokuhlanza ezisekelwe emanzini, ama-lactate esters noma ezinye izinyibilikisi ezikhethekile. Ngokuphambene nalokho, isidingo se-DCM ehlanzekile kakhulu, esezingeni eliphezulu sizohlala siqinile emikhakheni okunzima ukuyishintsha njengemithi kanye nokuhlanganiswa kwamakhemikhali okusezingeni eliphezulu. Ukukhula kwemboni kuzovela cishe ngokuphelele kule mikhakha ephezulu, enenani eliphezulu.
Ukusetshenziswa kwe-Closed-loop kanye nokulawulwa kokukhishwa komoya njengento ebalulekile yokusinda
Ukusetshenziswa kwe-DCM esikhathini esizayo kuzogcizelela kakhulu ukusebenza kwe-closed-loop. Lokhu kusho ukuthi amabhizinisi akhiqiza futhi asebenzisa i-DCM kumele atshale imali emishinini evaliwe ethuthukisiwe, izinhlelo zokubuyisa umusi ezisebenza kahle kakhulu (isb., ukumuncwa kwekhabhoni esebenzayo, ukubuyisa ukuminyana) kanye nobuchwepheshe bokwelapha obuphela emapayipini (isb., i-catalytic oxidation) ukuqinisekisa ukuthi ukukhishwa komoya kuncishiswa kube sezingeni eliphansi kakhulu. Amabhizinisi akwazi ukufeza ukujikeleza kwangaphakathi okuphumelelayo kanye nokuvuselelwa kwe-DCM azothola izinzuzo ezinkulu ngokwezindleko zokuthobela imithetho kanye nokuzinza kochungechunge lokuhlinzeka.
Ukusungula Izinto Ezintsha Kwezobuchwepheshe Kugxile Ekuphepheni Nasekubuyiseleni Impilo
Ukugxila kwe-R&D embonini ngeke kusakwazi ukwandisa amandla okukhiqiza e-DCM ayisisekelo, kodwa kuzogxila ezindaweni ezintathu ezibalulekile: 1) Ukuthuthukisa amafomula aphephile, njengokulungiselela okwenziwe ngokwezifiso okuncishisiwe kokuguquguquka; 2) Ukuqamba ubuchwepheshe bokubuyisa nokuhlanza ukuze kuthuthukiswe ukusebenza kahle kwezomnotho kokubuyisa i-DCM kusuka kugesi oyinkimbinkimbi kanye namanzi angcolile; 3) Ukuhlola imishini yenqubo ephephile nesebenza kahle njenge-microreactors yokusetshenziswa kwe-DCM emizileni yokwenziwa engenakuphindwa.
Ukungalingani Kwenqubomgomo Yesifunda Okwakha Ukuhwebelana Komhlaba Wonke
Ukushintshashintsha kwamandla okulawula ku-DCM kuwo wonke amazwe kungaholela ekuhlukeni kwesifunda ekukhiqizeni nasekusetshenzisweni. Imikhiqizo evela ezifundeni ezinemithethonqubo exegayo ingathunyelwa kwezilawulwa ngokuqinile, kodwa ibhekane nezithiyo zokuhweba ngasikhathi sinye. Izinguquko zenqubomgomo ezimakethe ezinkulu zabathengi emhlabeni zizoqhubeka nokuphazamisa ukugeleza kokuhweba kwamazwe ngamazwe kwe-DCM kanye nohlelo lwamanani.
Ukuhlola Okuqhubekayo Kwezindlela Ezingajwayelekile Zokuhlaza
Ekugcineni, imiphakathi yezemfundo neyezimboni yenza imizamo engapheli yokuthola ezinye izindlela ze-DCM ezinokusebenza okulinganayo noma okwamukelekayo kodwa izingozi zemvelo nezempilo eziphansi. I-carbon dioxide ebaluleke kakhulu, uketshezi lwe-ionic kanye nezinyibilikisi zamangqamuzana eziklanywe ngemvelo konke kuyizinkomba zocwaningo ezingaba khona, yize ukuthengiswa kwazo okukhulu kusathatha isikhathi.
Ngamafuphi, ikusasa le-DCM liyindaba yokulinganisela ukusebenza okunamandla nokukhula komthwalo wemfanelo emphakathini. Ngeke linyamalale ngobusuku obubodwa, kodwa isimo salo esikhethekile siyawohloka. Imboni izoshintsha ibe yimodeli ehlanjululwe kakhulu, ekhethekile futhi evaliwe. Kumabhizinisi afanele, ukuzivumelanisa nemithetho eqinile, ukutshala imali kubuchwepheshe obuhlanzekile kanye nokuhlola ngenkuthalo izixazululo ezihlukile zesikhathi eside kuzoba yindlela kuphela yokubhekana nezinselele zesikhathi esizayo. Isahluko sezimboni se-DCM siphenduka kusukela enkathini yokusetshenziswa okungenamkhawulo siye ekhasini elisha lokusetshenziswa okulawulwayo.
Isikhathi sokuthunyelwe: Jan-29-2026