Ho sebelisa cellulose joalo ka lisebelisoa tse tala,CMC-Nae lokisitsoe ka mokhoa oa mehato e 'meli. Ea pele ke ts'ebetso ea alkalization ea cellulose. Selulose e kopana le sodium hydroxide ho hlahisa alkali cellulose, ebe alkali cellulose e kopana le chloroacetic acid ho hlahisa CMC-Na, e bitsoang etherification.
Sistimi ea karabelo e tlameha ho ba alkaline. Ts'ebetso ena ke ea mokhoa oa Williamson ether synthesis. Mokhoa oa ho arabela ke nucleophilic substitution. Sistimi ea karabelo e na le alkaline, 'me e tsamaisana le litlamorao tse ling ka pel'a metsi, joalo ka sodium glycolate, glycolic acid le lihlahisoa tse ling. Ka lebaka la ho ba teng ha karabelo ea lehlakore, tšebeliso ea alkali le etherification e tla eketseha, ka hona e fokotsa katleho ea etherification; Ka nako e ts'oanang, sodium glycolate, glycolic acid le litšila tse ngata tsa letsoai li ka hlahisoa ka lehlakoreng la karabelo, ho baka bohloeki le phokotso ea ts'ebetso ea sehlahisoa. E le ho hatella maikutlo a mahlakoreng, hoa hlokahala hore u se ke ua sebelisa alkali ka mokhoa o utloahalang feela, empa hape le ho laola boholo ba tsamaiso ea metsi, motsoako oa alkali le mokhoa o tsosang takatso ka morero oa alkalization e lekaneng. Ka nako e ts'oanang, litlhoko tsa sehlahisoa ka viscosity le tekanyo ea ho fetola li lokela ho nkoa, 'me lebelo le susumetsang le mocheso li lokela ho nkoa ka ho feletseng. Taolo le lintlha tse ling, eketsa sekhahla sa etherification, le ho thibela ho hlaha ha karabelo ea lehlakore.
Ho latela mecha ea litaba e fapaneng ea etherification, tlhahiso ea indasteri ea CMC-Na e ka aroloa ka mekhahlelo e 'meli: mokhoa o thehiloeng metsing le mokhoa o thehiloeng ho solvent. Mokhoa oa ho sebelisa metsi e le mokhoa oa ho arabela o bitsoa mokhoa oa metsi a mahareng, o sebelisetsoang ho hlahisa alkaline mahareng le boemo bo tlaase ba CMC-Na. Mokhoa oa ho sebelisa solvent ea manyolo e le mokhoa oa ho arabela o bitsoa mokhoa oa solvent, o loketseng tlhahiso ea CMC-Na e mahareng le e phahameng. Liphetoho tsena tse peli li etsoa ka kneader, e leng ea ts'ebetso ea ho luba 'me hona joale ke mokhoa o ka sehloohong oa ho hlahisa CMC-Na.
Mokhoa o mahareng oa metsi:
Mokhoa o tsamaisoang ke metsi ke mokhoa oa pele oa tlhahiso ea indasteri, e leng ho itšoara ka selulose ea alkali le moemeli oa etherification tlas'a maemo a alkali le metsi a sa lefelloeng. Nakong ea alkalization le etherification, ha ho na mokhoa oa manyolo tsamaisong. Litlhoko tsa lisebelisoa tsa mokhoa oa mecha ea phatlalatso ea metsi li batla li le bonolo, ka lichelete tse fokolang le litšenyehelo tse tlaase. Bothata ke ho haella ha palo e kholo ea mokelikeli, mocheso o hlahisoang ke karabelo o eketsa mocheso, o potlakisa lebelo la karabelo ea lehlakore, o lebisa katlehong e tlaase ea etherification, le boleng bo tlaase ba sehlahisoa. Mokhoa ona o sebelisoa ho lokisa lihlahisoa tsa CMC-Na tsa maemo a mahareng le a tlase, joalo ka lihlapa, lisebelisoa tsa boholo ba masela le tse ling tse joalo.
Mokhoa oa ho qhibiliha:
Mokhoa oa solvent o boetse o bitsoa mokhoa oa organic solvent, 'me tšobotsi ea oona e ka sehloohong ke hore lik'hemik'hale tsa alkalization le etherification li etsoa tlas'a boemo ba motsoako oa tlhaho e le mokhoa oa ho arabela (diluent). Ho ea ka bongata ba diluent e sebetsang, e arotsoe ka mokhoa oa ho luba le mokhoa oa slurry. Mokhoa oa ho qhibiliha o tšoana le mokhoa oa ho itšoara ka mokhoa oa metsi, hape o na le mekhahlelo e 'meli ea alkalization le etherification, empa mokhoa oa ho itšoara oa mekhahlelo ena e' meli o fapane. Mokhoa oa ho qhibiliha o boloka mokhoa oa ho kolobisa alkali, ho hatella, ho senya, ho tsofala le tse ling tse teng ka mokhoa oa metsi, 'me alkalization le etherification kaofela li etsoa ka kneader. Bothata ke hore taolo ea mocheso e batla e fokola, 'me tlhokahalo ea sebaka le litšenyehelo li phahame. Ha e le hantle, bakeng sa tlhahiso ea lisebelisoa tse fapaneng tsa lisebelisoa, ho hlokahala ho laola ka thata mocheso oa tsamaiso, nako ea ho fepa, joalo-joalo, e le hore lihlahisoa tse nang le boleng bo botle le ts'ebetso li ka lokisoa.
Nako ea poso: Apr-25-2024