Phenol imathiriyeli ekrwada

Phenolyikhompawundi yeekhemikhali eziguquguqukayo ezinoluhlu olubanzi lwezicelo kushishino nakuphando. Ukulungiswa kwayo kwezorhwebo kubandakanya inkqubo yamanyathelo amaninzi aqala nge-oxidation ye-cyclohexane. Kule nkqubo, i-cyclohexane i-oxidized kwi-series intermediates, kuquka i-cyclohexanol kunye ne-cyclohexanone, eziguqulwa zibe yi-phenol. Makhe sihlolisise iinkcukacha zale nkqubo. 

 

Ukulungiswa kwezorhwebo kwephenol kuqala nge-oxidation ye-cyclohexane. Le mpendulo iqhutyelwa phambi kwe-agent oxidizing, njengomoya okanye i-oksijeni ecocekileyo, kunye ne-catalyst. I-catalyst esetyenzisiweyo kule mpendulo idla ngokuba ngumxube wesinyithi sokutshintsha, njenge-cobalt, i-manganese, kunye ne-bromine. Ukusabela kwenziwa kumaqondo obushushu aphezulu kunye noxinzelelo, ngokuqhelekileyo ukusuka kuma-600 ukuya kuma-900.°C kunye ne-10 ukuya kwi-200 i-atmospheres, ngokulandelanayo.

 

I-oxidation ye-cyclohexane iphumela ekubunjweni koluhlu lwabaphakathi, kuquka i-cyclohexanol kunye ne-cyclohexanone. Ezi intermediates ke iguqulelwa phenol kwinyathelo elilandelayo reaction. Le mpendulo iqhutyelwa phambi kwe-acid catalyst, njenge-asidi ye-sulfuric okanye i-hydrochloric acid. I-acid catalyst ikhuthaza ukuchithwa kwe-cyclohexanol kunye ne-cyclohexanone, okubangelwa ukubunjwa kwe-phenol kunye namanzi.

 

I-phenol ephumela ke ihlanjululwe nge-distillation kunye nezinye iindlela zokucoca ukususa ukungcola kunye nezinye iimveliso. Inkqubo yokucoca iqinisekisa ukuba imveliso yokugqibela ihlangabezana neemfuno zokucoceka kwizicelo ezahlukeneyo.

 

I-Phenol isetyenziswa kwiinkqubo ezahlukeneyo, kubandakanywa ukuveliswa kwe-polycarbonates, i-Bisphenol A (BPA), i-phenolic resins, kunye nezinye iindidi ezahlukeneyo. Iipolycarbonates zisetyenziswa ngokubanzi kwimveliso yezikhongozeli zeplastiki, iilensi, kunye nezinye izinto ezibonakalayo ngenxa yokungafihli okukhulu kunye nokuchasana nempembelelo. I-BPA isetyenziselwa ukuveliswa kwee-epoxy resins kunye nezinye izinto zokuncamathelisa, iingubo, kunye ne-composites. I-Phenolic resins isetyenziselwa ukuveliswa kwezinto ezinamathele, iingubo, kunye neengqungquthela ngenxa yokumelana nokushisa kunye neekhemikhali.

 

Ekugqibeleni, ukulungiswa kwezorhwebo kwe-phenol kubandakanya i-oxidation ye-cyclohexane, elandelwa ukuguqulwa kwama-intermediates kwi-phenol kunye nokuhlanjululwa kwemveliso yokugqibela. I-phenol ebangelwayo isetyenziswe kuluhlu olubanzi lwezicelo, kubandakanywa ukuveliswa kwezixhobo zeplastiki, i-adhesives, i-coatings, kunye ne-composites.


Ixesha lokuposa: Dec-11-2023