Ukubuka: 16 Umbhali: Isikhathi Sokushicilela Isihleli Sesayithi: 2024-04-16 Umsuka: Isayithi
I-Benzoic acid iyinhlanganisela ye-organic enefomula yamakhemikhali ethi C6H5COOH, enesakhiwo sendandatho ye-benzene kanye neqembu elisebenzayo le-carboxyl. Ngenxa yesakhiwo sayo samakhemikhali esiyingqayizivele kanye nezakhiwo, i-benzoic acid idlala indima ebalulekile embonini yezimonyo nezingubo, futhi isetshenziswa kabanzi ngenxa yokusebenza kwayo okuningi.
Embonini yezimonyo, i-benzoic acid kanye nokuphuma kwayo (njenge-sodium benzoate) kusetshenziswa kakhulu njengezilondolozi. Bangakwazi ukuvimbela ngempumelelo ukukhula kwama-microorganisms, okuhlanganisa amagciwane, isikhunta, nemvubelo, ngaleyo ndlela bandise impilo yeshalofu yemikhiqizo futhi bavikeleke ekungcoleni kwamagciwane. I-Benzoic acid kanye nosawoti wayo banemiphumela emihle yokulwa nokugqwala ngaphansi kwezimo ze-acidic, futhi isetshenziswa kabanzi kumafomula ezinhlobonhlobo zezimonyo, njengemikhiqizo ye-skincare, imikhiqizo yezinwele, nemikhiqizo yokunakekelwa komlomo, ngenxa yokuphepha nobumnene bayo.
Embonini kapende, i-benzoic acid kanye nokuphuma kwayo kuyasetshenziswa futhi njengezilondolozi ukuze kuvinjelwe ukungcoliswa kwamagciwane ngesikhathi sokugcinwa kanye nokusetshenziswa kwezingubo zokumboza. Ngaphezu kwalokho, i-benzoic acid ingasetshenziswa futhi njenge-reagent ye-pigment ukuze kuthuthukiswe ukuzinza nokuhlakazeka kwezingulube, ngaleyo ndlela kuthuthukiswe umbala nokusebenza kwezingubo. I-Benzoic acid ingasetshenziswa futhi njenge-rust inhibitor ukuvikela imishini yensimbi ekugqwaleni futhi yandise impilo yayo yesevisi.
I-multifunctionality ye-benzoic acid ibonakala ekusebenziseni kwayo njengendlela yokulungisa. Embonini yephunga, i-benzoic acid ingasetshenziswa ukugcina izici zokunambitheka kwemikhiqizo, futhi njengendlela yokulungisa empeleni, ukwandisa ukuqina kokunambitheka kwemikhiqizo. Ngaphezu kwalokho, i-benzoic acid nayo iye yasetshenziswa emkhakheni wezokwelapha, njengokukhiqizwa kwamafutha e-benzoic acid salicylic acid ekwelapheni izifo zesikhunta esikhumbeni kanye nezinye izifo zefungal ezikha phezulu.
Kafushane, i-benzoic acid kanye nokuphuma kwayo kusetshenziswa kakhulu embonini yezimonyo nezingubo zokumboza, futhi imisebenzi yazo ehlukahlukene njengokunqanda ukugqwala, ukulungisa amakha, ukuvikela umbala nokugqwala kuwenza abe amakhemikhali abalulekile futhi abalulekile kulezi zimboni.
Isakhiwo samangqamuzana e-benzoic acid sakhiwe indandatho ye-benzene kanye neqembu le-carboxyl (- COOH), elinefomula yamakhemikhali ethi C6H5COOH. Kulesi sakhiwo, iqembu le-carboxyl lixhumeke ngokuqondile ku-athomu ye-carbon ye-benzene ring, lenza i-asidi enamakha elula kakhulu.
Izinto ezibonakalayo ze-benzoic acid zihlanganisa ukubukeka kwayo, indawo encibilikayo, indawo yokubilisa, ukuminyana, kanye nokuncibilika. I-Benzoic acid ngokuvamile ivela njengamakristalu amhlophe, ama-scaly noma inaliti, anephunga elikhethekile le-benzene noma i-formaldehyde. Iphuzu layo elincibilikayo lingu-122.13 ℃, indawo yokubilisa ingu-249 ℃, futhi ukuminyana okuhlobene ngu-1.2659 (ku-15/4 ℃). I-Benzoic acid ine-solubility ephansi emanzini, kodwa incibilika kalula kuzincibilikisi zemvelo ezifana ne-ethanol ne-ether.
Mayelana nezakhiwo zamakhemikhali, i-benzoic acid iyi-asidi ebuthakathaka ene-asidi enamandla kancane kune-cyclohexane formic acid, okuthiwa iphezulu.
i-electronegativity ye-sp2 hybridized carbon athomu eringini ye-benzene kanye nomthelela obuthakathaka wokunikela nge-electron. I-Benzoic acid ingabhekana nokuguquguquka kwamakhemikhali okuhlukahlukene, okuhlanganisa ukusabela emaqenjini e-carboxyl, njengokuguqulwa kube usawoti, ama-esters, ama-acyl halides, ama-amide, nama-anhydrides. Ngaphezu kwalokho, ukusabela kwe-electrophilic substitution kungenzeka eringini ye-benzene ye-benzoic acid, okuholela kakhulu emikhiqizweni efakwe esikhundleni se-meta. I-Benzoic acid ingaphinda ikhiqize utshwala be-benzyl ngokusebenzisa ukusabela kokunciphisa i-catalytic futhi ibhekane ne-decarboxylation reactions ngaphansi kwezimo zokushisa ukuze ikhiqize i-carbon dioxide.
Ukusetshenziswa kwe-benzoic acid ezimonyoni kubonakala ikakhulukazi endimeni yayo njengesivikelo. Ngenxa yekhono layo lokuvimbela ngempumelelo ukukhula kwama-microorganisms, okuhlanganisa amagciwane kanye nesikhunta, i-benzoic acid isetshenziswa kakhulu kuzimonyo ezihlukahlukene kanye nemikhiqizo yokunakekelwa komuntu siqu ukuze kuqinisekiswe ukuphepha komkhiqizo nokwandisa impilo yeshalofu. Ekwakhiweni kwemikhiqizo yokunakekelwa kwesikhumba, i-benzoic acid ingasiza ekugcineni ukuzinza komkhiqizo, ivimbele ukubola komkhiqizo okubangelwa ukungcoliswa kwamagciwane, futhi ngaleyo ndlela ivikele impilo yomthengi.
Emikhiqizweni yokunakekelwa kwezinwele, i-benzoic acid nayo ingasebenzisa umphumela wayo wokulwa nokugqwala, ivikele umkhiqizo ekungcoleni kwamagciwane. Ngesikhathi esifanayo, ngenxa yomphumela wayo omncane esikhumbeni, kunganciphisa ukucasuka esikhumbeni esibucayi. Ngaphezu kwalokho, i-benzoic acid ingabuye ihambisane nezinye izithako emikhiqizweni yokunakekelwa kwezinwele, ithuthukise ulwazi lomsebenzisi nokusebenza kahle komkhiqizo, njengokwandisa ubushelelezi kanye nokucwebezela kwawo.
Kufanele kuqashelwe ukuthi nakuba i-benzoic acid inalezi zinzuzo ezingenhla, ukusetshenziswa kwayo futhi kudingeka kuhambisane nemithethonqubo efanele kanye namazinga okuphepha ukuze kuqinisekiswe ukuphepha kwabathengi. Ngaphezu kwalokho, amazwe ahlukene nezifunda zingase zibe nemikhawulo ehlukene ekusetshenzisweni kwe-benzoic acid ezimonyoni, ngakho-ke kuyadingeka ukuhambisana ngokuqinile nemithetho nemithetho yendawo ekuthuthukisweni nasekukhiqizeni umkhiqizo.
Ukusetshenziswa kwe-benzoic acid embonini kapende kubonakala ikakhulukazi endimeni yayo njengesivikelo, kanye nokuthuthukisa ukuqina nokuzinza kwezingubo zokugqoka. I-Benzoic acid kanye nosawoti bayo (njenge-sodium benzoate) kuvame ukusetshenziswa ngokuhambisana ne-sodium nitrite ukuze kulungiswe ama-anti-flash rust agents ngenxa yobungane bawo bemvelo kanye nemiphumela yokukhipha kancane, ngaleyo ndlela kuthuthukiswe ukusebenza kwe-anti-corrosion of coatings. Ukwengezwa kwe-benzoate kungenza buthaka izinga lokugqwala kwe-flash futhi kuthuthukise ukusebenza kokugqwala kwefilimu kapende. Lokhu kungenxa yokuthi inkimbinkimbi eyakhiwe ama-ion e-benzoate nensimbi ingakha ifilimu eliminyene le-passivation, linciphise izinga lokugqwala.
Ekwenzeni okukhethekile okunamathelayo, ukusetshenziswa kwe-benzoic acid kungathuthukisa ukumelana kwamanzi namakhemikhali efilimu kapende, kuyenze ifaneleke kakhulu ezindaweni ezithile zokufaka isicelo. Isibonelo, kuma-anti-corrosion coatings asekelwe emanzini, ukungezwa kwe-ammonium benzoate ne-sodium benzoate kungathuthukisa umphumela wokunqanda ukugqwala wefilimu kapende, ikakhulukazi ngaphansi kwezimo eziphansi ze-pH, lapho umphumela wokuvimbela ukugqwala wama-ion we-benzoate ubaluleke kakhulu. Ngaphezu kwalokho, i-benzoic acid ingasetshenziswa njengesengezo sokumboza. Ukwethulwa kwe-alkyd resin kungenza ifilimu yepende yome ngokushesha, kuyilapho kuthuthukisa ukucwebezela, ukuqina, nokumelana namanzi kwefilimu kapende.
I-Benzoic acid, njengesithako esivamile sokudla kanye nesilondolozi, ukuphepha kwayo bekulokhu kugxile ekukhathazekeni kwabathengi nabacwaningi. Ucwaningo selukhombisile ukuthi i-benzoic acid ayibeki usongo empilweni yomuntu ngaphansi kwamazinga okudla abekiwe aphephile.
Kodwa-ke, ukukhathazeka kwabathengi mayelana ne-benzoic acid ngokuyinhloko kubangelwa ukukhathazeka mayelana nemiphumela engemihle engase ibe khona kanye nokungaqiniseki ngomthelela ongaba khona wokudla isikhathi eside.
Ucwaningo lwezokuphepha lwe-benzoic acid lugxile kakhulu ezicini zayo ze-toxicological kanye nomthelela wayo emzimbeni womuntu. Ngokwezifundo ze-toxicological, i-benzoic acid inezinga elithile lokucasuka, kodwa ukucasuka kwayo esikhumbeni kuncane. Umhwamuko ungabangela ukucasuka kwendlela yokuphefumula ephezulu, amehlo, nesikhumba. Ezivivinyweni zezilwane, i-LD50 ye-benzoic acid iphakeme kakhulu, ikhombisa ubuthi obunamandla obuphansi. Ngaphezu kwalokho, i-benzoic acid kanye ne-sodium benzoate kungabuye kubonakale emizimbeni yabantu evamile, okubonisa ukuthi kungenziwa imetabolism evamile ngomzimba womuntu ngesilinganiso esithile.
Kodwa-ke, abathengi basenokukhathazeka ngokuphepha kwe-benzoic acid, ikakhulukazi ukusetshenziswa kwayo ezinganeni nakubantu ababucayi. Olunye ucwaningo lubonisa ukuthi i-benzoic acid ne-sodium benzoate ingase ibangele ukungezwani komzimba, futhi kwezinye izimo ingase iholele ngisho nasekuvuvukeni kwesikhumba noma ezinkingeni zokuphefumula. Ukwengeza, ucwaningo mayelana ne-carcinogenicity engaba khona ye-benzoic acid nayo idonsele ukunaka komphakathi, nakuba ubufakazi bamanje abanele ukusekela lo mbono.
Ukuhambisana nemithethonqubo: Landela imithethonqubo kanye namazinga omkhawulo wokusetshenziswa kwe-benzoic acid yizikhungo zokuphepha kokudla zasekhaya nezamazwe ngamazwe.
Ukusetshenziswa okusesilinganisweni: Uma usebenzisa i-benzoic acid ekucubunguleni ukudla, kufanele ilawulwe ngaphansi komthamo ophephile ukuze kugwenywe ukungezwani ngokweqile.
Incazelo Yelebula: Bonisa ngokusobala ukuba khona kwe-benzoic acid kulebula yomkhiqizo ukuze abathengi benze izinqumo ezinolwazi.
Ukucatshangelwa kwenani labantu okuzwelayo: Kubantu abaziwa ngokuzwela ku-benzoic acid, enye imikhiqizo engenayo i-benzoic acid kufanele ihlinzekwe.
Ukuqeqeshwa kokuphepha: Nikeza ukuqeqeshwa kubasebenzi embonini yokucubungula ukudla neyokukhiqiza mayelana nokusetshenziswa okuphephile kwe-benzoic acid ukuze kuqinisekiswe ukuthi bayakuqonda ukuphatha nezindlela zokusebenzisa okufanele.
I-Benzoic acid, njengekhemikhali esetshenziswa kabanzi emkhakheni wokudla, izimonyo, nezimboni, ithole ukunakwa okusabalele ngomthelela wayo kwezemvelo kanye nezinkinga zokusimama. Ukukhiqizwa nokusetshenziswa kwe-benzoic acid kungase kube nemithelela ethile kwezemvelo, okuhlanganisa kodwa kungagcini nje ngokukhishwa kwamanzi angcolile, ukungcoliswa komoya, kanye nokukhiqizwa kukadoti oqinile. Lezi zinkinga zingase zibe nemiphumela emibi ku-ecosystem yasemanzini, ikhwalithi yomoya, kanye nekhwalithi yomhlabathi.
Ukukhishwa kwamanzi angcolile: Phakathi nenqubo yokukhiqiza i-benzoic acid, amanzi angcolile aqukethe izinto eziphilayo kanye nezinto ezingaphili angase akhiwe. Uma ikhishwa ngokuqondile ngaphandle kokwelashwa okufanele, ingase ibangele ukungcoliswa kwesimiso sezinto eziphilayo zasemanzini.
Ukungcoliswa komoya: Ukukhiqizwa kanye nokusetshenziswa kwe-benzoic acid kungase kukhiqize ama-volatile organic compounds (VOCs), angabamba iqhaza ekuphenduleni kwe-photochemical emkhathini futhi athinte ikhwalithi yomoya.
Udoti oqinile: Inqubo yokukhiqiza i-benzoic acid ingase ikhiqize udoti oqinile, okuthi, uma ingaphathwa kahle, ibangele ukungcoliswa komhlabathi namanzi angaphansi komhlaba.
Okuphuma kokuphuma ku-benzoic acid ye-Biobased: Ngokuhlanganiswa kokuphuma kokuphuma kwe-benzoic acid (LBADs) okususelwa ku-lignin), ukusetshenziswa kwezinto ezingavuthiwe ze-biomass ukukhiqiza i-benzoic acid kungacutshungulwa, okusiza ukunciphisa ukuncika emithonjeni ye-petrochemical futhi kunikeze indlela yokukhiqiza eluhlaza futhi evumelana nemvelo.
I-Electrochemical synthesis: Ukwenziwa kwe-Electrochemical kunikeza enye indlela engenzeka yokwenziwa kwamakhemikhali endabuko ngokuhlanganisa i-benzoic acid kanye nokuphuma kwayo ngokusabela kokunciphisa i-electrochemical, engenziwa ngaphansi kwezimo ezingenazo i-solvent futhi yehlise ukukhiqizwa kwemikhiqizo.
Izimiso zamakhemikhali aluhlaza: Ukusebenzisa izimiso zamakhemikhali aluhlaza enqubweni yokukhiqiza i-benzoic acid, njengokusebenzisa ama-catalyst ukuze kuncishiswe imikhiqizo ephumayo, ukuthuthukisa ukusetshenziswa kwempahla eluhlaza, kanye nokusebenzisa izinto zokusetshenziswa ezivuselelekayo, kunganciphisa umthelela endaweni ezungezile.
Ukuze kuncishiswe umthelela we-benzoic acid emvelweni, uchungechunge lwezinyathelo zokuvikela imvelo kufanele luthathwe, okuhlanganisa kodwa kungagcini nje:
Qinisa amanzi angcolile nokwelashwa kwegesi ephumayo: Qinisekisa ukuthi amanzi angcolile kanye negesi ephumayo ekhiqizwa phakathi nenqubo yokukhiqiza kuphathwa ngendlela efanele ukuze kuhlangatshezwane nezindinganiso zokukhipha umoya.
Lungiselela inqubo yokukhiqiza: Ngokuthuthukiswa kobuchwepheshe kanye nokwenza ngcono inqubo, nciphisa ukukhishwa okungcolile ngesikhathi senqubo yokukhiqiza.
Khuthaza ezinye izindlela ezisimeme: Khuthaza ucwaningo nokusebenzisa ezinye izindlela ze-benzoic acid ezisuselwa ku-bio noma ezenziwe ngamakhemikhali ukuze kwehliswe umthelela wazo endaweni ezungezile.
Qinisa ukugadwa kwendawo ezungezile: Ngokwakhiwa nokuqaliswa kwemithetho, imithethonqubo, namazinga emvelo, qinisa ukugadwa kwemvelo ngesikhathi sokukhiqizwa nokusetshenziswa kwe-benzoic acid.
Imakethe yomhlaba wonke ye-benzoic acid kulindeleke ukuthi iqhubeke nokukhula eminyakeni ezayo. Ngokusho kwedatha, usayizi wemakethe ye-benzoic acid emhlabeni wonke ufinyelele ku-6.549 billion yuan ngo-2022, futhi kubikezelwa ukuthi uzofinyelela ama-yuan ayizigidi eziyizinkulungwane ezingu-9.073 ngo-2028, ngesilinganiso sokukhula konyaka esihlanganisiwe esingu-5.68%. Lokhu kukhombisa ukuthi isidingo se-benzoic acid emakethe sikhula kancane kancane, futhi umbono wemakethe unethemba.
Ngokwamanani, ngokombiko, intengo emaphakathi yenyanga ye-benzoic acid emakethe yaseShayina ngo-2022 yayingamayuan/ton angama-9563.46, ukukhuphuka konyaka ngo-29.36%, okubonisa isidingo esinamandla semakethe se-benzoic acid kanye nokukhuphuka kwamanani entengo.
Mayelana nokuhlinzekwa, ubuchwepheshe bokukhiqiza be-benzoic acid buye bathuthukiswa ngokuqhubekayo, kuthuthukisa ukusebenza kahle kokukhiqiza kanye nekhwalithi yomkhiqizo. Khonamanjalo, ngokuqiniswa kwemithethonqubo yezemvelo, umthelela wemvelo kanye nezinkinga zokusimama ohlelweni lokukhiqiza nakho sekuthole ukunakwa okwengeziwe, okungase kube nomthelela esimweni sokuhlinzeka. Ukuphepha kwe-benzoic acid kuyaqashwa, futhi umthamo ulawulwa ngokuqinile, okungase kuholele ekulungisweni kwesakhiwo sokuhlinzeka.
Mayelana nesidingo, ukusetshenziswa kwe-benzoic acid emikhakheni eminingi efana nokudla, izimonyo, imithi, odayi, amapulasitiki, njll. kuye kwaqhuba ukukhula kwesidingo. Ikakhulukazi emkhakheni wokugcinwa kokudla kanye nama-plasticizers, isidingo se-benzoic acid kanye nokuphuma kwayo sizinzile futhi kulindeleke ukuthi sikhuphuke. Ngaphezu kokusetshenziswa kwendabuko ekukhiqizeni i-sodium benzoate, i-benzoic acid iphinde isetshenziselwe ukukhiqizwa kwe-benzoate esters kanye nezinye izinjongo ezihlukahlukene, okubonisa ukuthi insimu yokufunwa iyakhula.
Ukukhula kwezimakethe ezisafufusa, njengakwamanye amazwe ase-Asia naseNingizimu Melika, kuba umfutho omusha wokukhula kwesidingo se-benzoic acid. Inqubo yokukhula komnotho kanye nezimboni kulezi zifunda ihlinzeka ngamathuba amasha okukhula emakethe ye-benzoic acid.
Umthelela wenqubekelaphambili yezobuchwepheshe embonini ye-benzoic acid ubalulekile. Ukuthuthukiswa kobuchwepheshe obusha bokukhiqiza nezinqubo kusiza ukuthuthukisa ukusebenza kahle kokukhiqiza nokunciphisa izindleko ze-benzoic acid, kuyilapho kusiza ukwehlisa imithelela yemvelo phakathi nenqubo yokukhiqiza. Sinkulu indawo yokwenziwa ngcono embonini yasekhaya ye-benzoic acid, futhi ukuthuthuka kwesayensi nobuchwepheshe kuzothuthukisa ubuchwepheshe bokukhiqiza, okuyinto enhle ekuthuthukisweni kwemboni.
Ukubaluleka kwe-benzoic acid embonini yezimonyo nezingubo zokumboza kuyabonakala. Njengesilondolozi esisebenzayo, sisetshenziswa kabanzi ezimonyoni, esiza ukwandisa isikhathi seshalofu semikhiqizo futhi siyivikele ekungcoleni kwamagciwane, ukuqinisekisa ukuphepha kwabathengi. Embonini kapende, i-benzoic acid ayisebenzi nje njengesivikelo sokuthuthukisa ukumelana nokugqwala kwezingubo, kodwa futhi njenge-ejenti yokulungisa umbala nephunga ukuze kuthuthukiswe umbala nokusebenza kwezingubo zokugqoka kanye nokwandisa ukuncintisana kwemakethe kwemikhiqizo.
Uma ubheka phambili, imakethe ye-benzoic acid kulindeleke ukuthi iqhubeke nokukhula. Ngokuthuthuka komnotho womhlaba kanye nokukhula kwesibalo sabantu, ikakhulukazi ezimakethe ezisafufusa, isidingo se-benzoic acid kulindeleke ukuthi sikhuphuke. Ukuqanjwa kabusha kwezobuchwepheshe kanye nokusebenza kahle kokukhiqiza okuthuthukisiwe kuzosiza ukunciphisa izindleko, ukuthuthukisa ikhwalithi yomkhiqizo, futhi ukuqiniswa kwemithetho yemvelo kuzoqhubezela imboni ekuthuthukisweni okusimeme kanye nemvelo enobungani. Ngaphezu kwalokho, ukunaka nokucwaninga ngokuphepha kwe-benzoic acid kuzoqhubeka nokugqugquzela ukubuyekezwa kwezindinganiso nemikhawulo yokusetshenziswa kwayo kokuphepha emikhakheni ehlukahlukene yezicelo, kuqinisekiswe impilo yabathengi kanye nokuvikelwa kwemvelo.
Embonini yezimonyo, njengoba abathengi baya ngokuya begxila ekuphepheni nasekuphileni kwemvelo kwezithako zomkhiqizo, ukusetshenziswa kwe-benzoic acid kungase kube ngaphansi kwemithetho eqinile. Ngakho-ke, ukuthuthukisa ezinye izindlela eziphephile nezinobungani nemvelo esikhundleni sokulondolozwa kwemvelo kuzoba umhlahlandlela obalulekile ekuthuthukisweni kwemboni. Embonini kapende, ngokuthandwa kwezakhiwo eziluhlaza kanye nemiqondo yokuthuthukiswa okusimeme, isidingo sezingubo ezinobungani bemvelo sizoqhubeka sikhula, okuzokhuthaza abakhiqizi be-benzoic acid ukuthi bathuthukise imikhiqizo esebenza kahle futhi ehambisana nemvelo.
