Donje rakanatswa—kuvhura—kunyorovesa—kunopedza simba—kuparadzanisa—kusuka—kuparadzanisa, kuomesa—kupwanya—kurongedza—kuvhura donje rakapedzwa: donje rakanatswa rinovhurwa kuti ribvise simbi, uye rozopwanywa. Donje rakanatswa rakapwanywa riri muchimiro chehupfu, uye saizi yaro i80 mesh uye transmittance ndeye 100%. Kana zvisina kudaro, zviri nyore kuunganidza pamwe chete panguva yekuita reaction uye kuderedza kushanda kwe etherification.
Alkalization: Wedzera donje rakanatswa nehupfu mushure mekuvhura mune inert solvent, worishandisa nemvura ine alkali neyakapfava kuti riwedzere lattice yedonje rakanatswa, izvo zvinoita kuti mamorekuru e etherifying agent apinde, uye zvinovandudza kufanana kwe etherification reaction. Alkali inoshandiswa mu alkaliization isimbi hydroxide kana organic base. Huwandu hwealkali hwakawedzerwa (nehukuru, hwakafanana pazasi) hwakapetwa ka0.1-0.6 kupfuura hwedonje rakanatswa, uye huwandu hwemvura yakapfava hwakapetwa ka0.3-1.0 kupfuura hwedonje rakanatswa; inert solvent musanganiswa wealcohol ne hydrocarbon, uye huwandu hweinert solvent hwakawedzerwa idonje rakanatswa. Ka7-15: inert solvent inogonawo kuva alcohol ine 3-5 carbon atoms (senge alcohol, propanol), acetone. Inogonawo kuva aliphatic hydrocarbons uye aromatic hydrocarbons; tembiricha inofanira kudzorwa mukati me 0-35°C panguva yealkaliization; nguva yealkaliization ingangoita awa imwe. Kugadziriswa kwekupisa nenguva kunogona kutsanangurwa zvichienderana nezvinodiwa nezvinhu uye chigadzirwa.
Kuisa etherification: Mushure mekurapa kwealkalizing, pasi pemamiriro evacuum, etherification inoitwa nekuwedzera etherifying agent, uye etherifying agent ipropylene oxide. Kuti kuderedza kushandiswa kwe etherifying agent, mu etherification process, etherifying agent inowedzerwa kaviri, huwandu hwekuwedzera kwekutanga hwakapetwa ka1-3.5 kupfuura yedonje rakacheneswa, uye huwandu hwese hwekuwedzera kaviri hwakapetwa ka1.5-4 kupfuura yedonje rakacheneswa. Mushure mekuwedzera etherifying agent kekutanga, kurunga patembiricha ye ≤30°C kwemaminetsi makumi mana nemashanu kusvika makumi mapfumbamwe, wobva wapisa kusvika 50-100°C kuti etherification isvike, nguva yacho i1-5h, wobva watonhorera kusvika ≤30°C. Wedzera etherified Jing kechipiri wokurunga, nguva yekukurunga i30-120min, wobva wapisa kusvika ? ? ? Ita etherification, nguva yacho i1-4h, panguva ino, donje rakanatswa uye etherifying agent zvinopindura zvizere kugadzira H-HPC.
Kupwanya nekurongedza: chigadzirwa chakaomeswa chechinhu ichi chinopwanya nekusefa. Hukuru hwechinhu chinopwanya nekusefa chechinhu ichi i40 mesh uye transmittance i10096, kana zvichienderana nezvinodiwa nemushandisi. Wobva wachirongedza kunze kwefekitori.
Nguva yekutumira: Gumiguru-13-2022