I-Technological Innovation: Ukuhlanganiswa kwe-Cosmetic-Grade Phenoxyethanol kusuka ku-Ethylene Oxide ne-Phenol

Isingeniso

I-Phenoxyethanol, i-preservative esetshenziswa kakhulu ezimonyoni, isizuze ukuvelela ngenxa yokuphumelela kwayo ngokumelene nokukhula kwe-microbial kanye nokuhambisana nokwakheka kwesikhumba. Ngokwesiko ihlanganiswa nge-Williamson ether synthesis isebenzisa i-sodium hydroxide njengesisusa, inqubo ivamise ukubhekana nezinselelo ezinjengokwakhiwa komkhiqizo, ukungasebenzi kahle kwamandla, kanye nokukhathazeka kwemvelo. Intuthuko yakamuva kukhemikhali ye-catalytic kanye nobunjiniyela obuluhlaza kuvule indlela entsha: ukusabela okuqondile kwe-ethylene oxide ne-phenol ukukhiqiza i-phenoxyethanol esezingeni eliphakeme, yezimonyo. Lokhu okusha kuthembisa ukuchaza kabusha amazinga okukhiqiza ezimbonini ngokuthuthukisa ukusimama, ukukala, kanye nokusebenza kahle kwezindleko.

Izinselelo Ezindleleni Ezivamile

I-classical synthesis ye-phenoxyethanol ihilela ukusabela kwe-phenol nge-2-chloroethanol ezimweni ze-alkaline. Nakuba isebenza kahle, le ndlela ikhiqiza i-sodium chloride njenge-byproduct, edinga izinyathelo ezibanzi zokuhlanza. Ukwengeza, ukusetshenziswa kwezinto ezixutshwa nge-chlorine kuphakamisa ukukhathazeka kwemvelo nokuphepha, ikakhulukazi ngokuhambisana nokushintsha kwemboni yezimonyo kuzimiso "zekhemistri eluhlaza". Ngaphezu kwalokho, ukulawulwa kokusabela okungahambisani kuvame ukuholela ekungcoleni okufana nokuphuma kwe-polyethylene glycol, okuphazamisa ikhwalithi yomkhiqizo nokuhambisana nomthetho.

I-Technological Innovation

Impumelelo ilele ezinyathelweni ezimbili zenqubo yokuvuselela eqeda ama-reagents ane-chlorinated futhi inciphise imfucuza:

Ukusebenza kwe-Epoxide:I-Ethylene oxide, i-epoxide esebenza kakhulu, ivuleka indandatho lapho kukhona i-phenol. I-novel heterogeneous acid catalyst (isb, i-sulfonic acid esekelwa yi-zeolite) yenza lesi sinyathelo ngaphansi kwamazinga okushisa aphansi (60–80°C), igweme izimo ezidinga amandla.

I-Etherification ekhethiwe:I-catalyst iqondisa ukusabela ekwakhekeni kwe-phenoxyethanol ngenkathi icindezela ukusabela okuseceleni kwe-polymerization. Izinhlelo ezithuthukisiwe zokulawula inqubo, okuhlanganisa ubuchwepheshe be-microreactor, ziqinisekisa izinga lokushisa elinembile kanye nokuphathwa kwe-stoichiometric, ukufeza> amazinga okuguqulwa angu-95%.

Izinzuzo Eziyinhloko Zendlela Entsha

Ukusimama:Ngokufaka i-ethylene oxide esikhundleni sama-precursors ane-chlorinated, inqubo iqeda imifudlana yemfucuza eyingozi. Ukusebenziseka kabusha kwe-catalyst kunciphisa ukusetshenziswa kwezinto, kuhambisana nemigomo yomnotho oyindilinga.

Ubumsulwa nokuphepha:Ukungabikho kwama-ion e-chloride kuqinisekisa ukuthotshelwa kwemithetho yezimonyo eqinile (isb., I-EU Cosmetics Regulation No. 1223/2009). Imikhiqizo yokugcina ihlangabezana > nobumsulwa obungu-99.5%, obubalulekile ekusetshenzisweni kokunakekelwa kwesikhumba okubucayi.

Ukusebenza Kahle Kwezomnotho:Izinyathelo zokuhlanza ezenziwe lula kanye nezimfuno eziphansi zamandla zehlisa izindleko zokukhiqiza ngo-~30%, zinikeza izinzuzo zokuncintisana kubakhiqizi.

Imithelela Yezimboni

Lokhu okusha kufika ngesikhathi esibalulekile. Ngesidingo somhlaba wonke se-phenoxyethanol okulindeleke ukuthi sikhule ku-5.2% CAGR (2023–2030), siqhutshwa izitayela zezimonyo zemvelo kanye nemvelo, abakhiqizi babhekana nengcindezi yokuthi basebenzise imikhuba eco-friendly. Izinkampani ezifana ne-BASF kanye ne-Clariant sezivele zahlola amasistimu afanayo we-catalytic, zibika imikhondo yekhabhoni encishisiwe kanye nesikhathi esisheshayo sokuya emakethe. Ngaphezu kwalokho, ukwehla kwenqubo kusekela ukukhiqizwa okusabalalisiwe, okuvumela amaketanga okunikezela ngezifunda futhi kuncishiswe ukukhishwa okuhlobene nezinhlelo.

Amathemba Ekusasa

Ucwaningo oluqhubekayo lugxile ku-bio-based ethylene oxide etholakala ezinsizeni ezivuselelekayo (isb., i-ethanol yomoba) ukuze kuqhutshekwe nokukhipha ikhabhoni kule nqubo. Ukuhlanganiswa nezinkundla zokwenza ngcono zokusabela okushayelwa yi-AI kungathuthukisa ukubikezelwa kwesivuno kanye nempilo yonke ye-catalyst. Intuthuko enjalo ibeka i-phenoxyethanol synthesis njengemodeli yokukhiqiza amakhemikhali esimeme emkhakheni wezimonyo.

Isiphetho

I-catalytic synthesis ye-phenoxyethanol evela ku-ethylene oxide kanye ne-phenol ibonisa ukuthi ukuqanjwa kabusha kwezobuchwepheshe kungavumelanisa kanjani ukusebenza kahle kwezimboni nokuphathwa kwemvelo. Ngokubhekana nemikhawulo yezindlela zefa, le ndlela yokusebenzela ayifezi nje kuphela izidingo eziguqukayo zemakethe yezimonyo kodwa futhi ibeka ibhentshimakhi yamakhemikhali aluhlaza ekukhiqizweni kwamakhemikhali okukhethekile. Njengoba okuthandwa ngabathengi kanye nemithethonqubo iqhubeka nokubeka phambili ukusimama, le mpumelelo izohlala ibalulekile ekuqhubekeleni phambili kwemboni.

Lesi sihloko sigqamisa ukuhlangana kwamakhemikhali, ubunjiniyela, nokusimama, sinikeza isifanekiso sezinto ezintsha ezizayo ekukhiqizeni izithako zezimonyo.