Samar da ethers mai tsabta na cellulose ya ƙunshi matakai da yawa, farawa daga hakar cellulose daga kayan shuka zuwa tsarin gyaran sinadaran.
Sourcing Cellulose: Cellulose, wani polysaccharide da aka samu a cikin ganuwar tantanin halitta na tsire-tsire, yana aiki a matsayin ɗanyen abu don ethers cellulose.Tushen gama gari sun haɗa da ɓangaren litattafan almara, auduga, da sauran tsire-tsire masu fibrous kamar jute ko hemp.
Pulping: Pulping shine tsarin raba zaruruwan cellulose daga kayan shuka.Yawanci ana samun wannan ta hanyar inji ko sinadarai.Juyin injina ya haɗa da niƙa ko tace kayan don raba zaruruwa, yayin da sinadarai pulping, kamar tsarin kraft, yana amfani da sinadarai kamar sodium hydroxide da sodium sulfide don narkar da lignin da hemicellulose, yana barin cellulose a baya.
Bleaching (Na zaɓi): Idan ana son tsafta mai yawa, ɓangaren litattafan al'ada na iya yin aikin bleaching don cire duk sauran lignin, hemicellulose, da sauran ƙazanta.Chlorine dioxide, hydrogen peroxide, ko oxygen sune abubuwan da aka saba amfani da su a wannan matakin.
Kunnawa: Cellulose ethers yawanci ana shirya su ta hanyar amsa cellulose tare da alkali karfe hydroxides don samar da tsaka-tsakin alkali cellulose.Wannan matakin ya ƙunshi kumburin zaruruwan cellulose a cikin maganin sodium hydroxide ko potassium hydroxide a yanayin zafi mai tsayi.Wannan mataki na kunnawa yana sa cellulose ya fi mayar da martani ga etherification.
Etherification: Etherification shine babban mataki na samar da ethers cellulose.Ya ƙunshi gabatar da ƙungiyoyin ether (kamar methyl, ethyl, hydroxyethyl, ko ƙungiyoyin hydroxypropyl) akan kashin bayan cellulose.Yawanci ana aiwatar da wannan dauki ta hanyar magance alkali cellulose tare da etherifying wakilai kamar alkyl halides (misali, methyl chloride na methyl cellulose), alkylene oxides (misali, ethylene oxide na hydroxyethyl cellulose), ko alkyl halohydrins (misali, propylene oxide na hydroxypropyl cellulose). ) ƙarƙashin yanayin sarrafawa na zazzabi, matsa lamba, da pH.
Neutralization da Washing: Bayan etherification, da dauki cakuda ne neutralized don cire wuce haddi alkali.Ana yin wannan yawanci ta hanyar ƙara acid, irin su hydrochloric acid ko sulfuric acid, don kawar da alkali da haɓaka ether cellulose.Sa'an nan kuma a wanke samfurin da aka samu da ruwa don cire duk wasu sinadarai da kayan aiki.
Bushewa: Samfurin ether na cellulose da aka wanke yana yawanci bushe don cire danshi mai yawa da samun foda na ƙarshe ko granular.Ana iya yin wannan ta amfani da dabaru irin su bushewar iska, bushewar iska, ko bushewar feshi.
Gudanar da Inganci: Matakan kula da ingancin suna da mahimmanci don tabbatar da tsabta, daidaito, da abubuwan da ake so na ethers cellulose.Wannan ya haɗa da gwada samfurin don sigogi kamar matakin maye gurbin, danko, rarraba girman barbashi, abun cikin danshi, da tsabta ta amfani da dabarun nazari kamar titration, viscometry, da spectroscopy.
Marufi da Adana: Da zarar an bushe ethers na cellulose kuma an gwada ingancin su, ana tattara su cikin kwantena masu dacewa kuma a adana su a ƙarƙashin yanayin sarrafawa don hana ɗaukar danshi da lalata.Daidaitaccen lakabi da takaddun bayanan tsari suma suna da mahimmanci don ganowa da bin ka'idoji.
Ta bin waɗannan matakan, yana yiwuwa a samar da ethers na cellulose mai tsafta tare da kaddarorin da ake so don aikace-aikacen masana'antu daban-daban, gami da magunguna, abinci, kayan kwalliya, masaku, da kayan gini.
Lokacin aikawa: Afrilu-24-2024