Umqhaphu ocociweyo—ukuvula—ukunyibilikisa—ukuthambisa—ukuthambisa—ukwahlula—ukuhlamba—ukwahlula, ukomisa—ukucola—ukupakisha—ukugqiba ukuvulwa komqhaphu: umqhaphu ocociweyo uyavulwa ukuze kususwe isinyithi, uze emva koko ucolwe. Umqhaphu ocociweyo ocoliweyo ukwimo yomgubo, kwaye ubukhulu bawo buyi-80 mesh kwaye ukuhanjiswa kwe-transmittance yi-100%. Ngaphandle koko, kulula ukuhlangana kunye ngexesha lenkqubo yokusabela kwaye kuncitshiswe ukusebenza kakuhle kwe-etherification.
I-Alkalization: Yongeza ikotoni ecociweyo ecociweyo emva kokuyivula kwi-solvent engasebenziyo, uze uyivule ngamanzi e-alkali nathambileyo ukuze ivuthulule i-lattice yekotoni ecociweyo, enceda ukungena kwee-molecules ze-etherifying agent, kwaye iphucule ukufana kwe-etherification reaction. I-alkali esetyenziswa kwi-alkaliization yi-metal hydroxide okanye isiseko se-organic. Ubungakanani be-alkali eyongeziweyo (ngobunzima, obufanayo ngezantsi) buphindwe ka-0.1-0.6 kunokokoti ocociweyo, kwaye ubuninzi bamanzi athambileyo buphindwe ka-0.3-1.0 kunokokoti ocociweyo; i-solvent engasebenziyo ngumxube we-alcohol kunye ne-hydrocarbon, kwaye ubuninzi be-solvent engasebenziyo eyongeziweyo yikotoni ecociweyo. Amaxesha asi-7-15: i-solvent engasebenziyo inokuba yi-alcohol ene-3-5 carbon atom (ezifana notywala, i-propanol), i-acetone. Inokuba yi-aliphatic hydrocarbons kunye ne-aromatic hydrocarbons; ubushushu kufuneka bulawulwe ngaphakathi kwe-0-35°C ngexesha le-alkalization; ixesha le-alkalization limalunga neyure eli-1. Ukulungiswa kobushushu kunye nexesha kunokugqitywa ngokweemfuno zezinto kunye nemveliso.
Ukufakelwa kwe-ether: Emva konyango lwe-alkalizing, phantsi kweemeko ze-vacuum, ukufakelwa kwe-ether kwenziwa ngokongeza i-etherifying agent, kwaye i-etherifying agent yi-propylene oxide. Ukuze kuncitshiswe ukusetyenziswa kwe-etherifying agent, kwinkqubo yokufakelwa kwe-ether, i-etherifying agent yongezwa kabini, ubungakanani bokongeza kokuqala buphindwe ka-1-3.5 kunoko kokotoni ocociweyo, kwaye inani lilonke lokongeza kabini liphindwe ka-1.5-4 kunokokoti ocociweyo. Emva kokongeza i-etherifying agent okokuqala, xuba kubushushu obuyi-≤30°C kangangemizuzu engama-45-90, uze ufudumale ukuya kuthi ga kwi-50-100°C ukuze ukufakelwa kwe-ether, ixesha liyi-1-5h, uze uphole uye kuthi ga kwi-≤30°C. Yongeza i-etherified Jing okwesibini uze uxube, ixesha lokuxuba liyi-30-120min, uze ufudumale ukuya kuthi ga kwi-??? Yenza i-etherification, ixesha liyi-1-4h, ngeli xesha, umqhaphu ocoliweyo kunye ne-etherifying agent zisabela ngokupheleleyo ekuveliseni i-H-HPC.
Ukucolwa kunye nokupakishwa: imveliso eyomileyo yale mveliso intsha iyacolwa kwaye ihluzwe. Ubungakanani besuntswana yemveliso ecoliweyo nehluzwe yale mveliso yi-40 mesh kwaye uthumelo yi-10096, okanye ngokweemfuno zomsebenzisi. Emva koko yipakishe uyikhuphe efektri.
Ixesha lokuthumela: Okthobha-13-2022