Iyo pulping process ye cellulose ethers inosanganisira akati wandei ekubvisa cellulose kubva kune yakabikwa uye wozoishandura kuita cellulose ethers. Cellulose ethers imhando dzakasiyana-siyana dzakasanganiswa nekushandiswa mumaindasitiri akasiyana siyana, anosanganisira emishonga, chikafu, machira uye kuvaka. Iyo pulping process yakakosha kuwana yemhando yepamusoro cellulose, iyo mbishi yekugadzira cellulose ethers. Iyi inotevera tsananguro yakadzama ye cellulose ether pulping process:
1. Kusarudzwa kwezvinhu:
Iyo pulping process inotanga nekusarudzwa kwezvinhu zvakasvibirira zvine cellulose. Nzvimbo dzinowanzowanikwa dzinosanganisira huni, donje, uye mamwe mafiber emiti. Kusarudzwa kwezvinhu zvakasvibirira zvinoenderana nezvinhu zvakaita sekuwanikwa kwe cellulose ether, mutengo uye zvinhu zvinodiwa.
2. Nzira yekugadzira pulp:
Kune nzira dzakawanda dze cellulose pulping, kunyanya kusanganisira kemikari pulping uye mechanical pulping.
3. Chemical pulping:
Kraft pulping: Inosanganisira kurapa machipisi ehuni nemusanganiswa we sodium hydroxide uye sodium sulfide. Iyi nzira inonyungudutsa lignin, ichisiya kumashure kwe cellulosic fiber.
Sulfite pulping: Kushandisa sulfurous acid kana bisulfite kuputsa lignin mune feedstock.
Organic solvent pulping: Kushandisa organic solvents senge ethanol kana methanol kunyungudutsa lignin uye kupatsanura cellulose fiber.
4. Mechanical pulping:
Stone-ground wood pulping: Kunosanganisira kukuya huni pakati pematombo kuparadzanisa fiber nemuchina.
Refiner Mechanical Pulping: Inoshandisa mechanical simba kuparadzanisa fiber nekunatsa huni machipisi.
5. Bvuura:
Mushure mekuputika, cellulose inopinda maitiro ekuchenesa kubvisa tsvina uye ruvara. Chlorine, chlorine dioxide, hydrogen peroxide kana oxygen inogona kushandiswa panguva yekutsvaira.
5.. Cellulose kugadziriswa:
Mushure mekucheneswa, cellulose inogadziridzwa kugadzira cellulose ethers. Nzira dzakajairwa dzinosanganisira etherification, esterification uye mamwe maitiro emakemikari ekuchinja chimiro chemuviri uye chemakemikari e cellulose.
6. Etherification maitiro:
Alkalization: Kurapa cellulose nealkali (kazhinji sodium hydroxide) kugadzira alkali cellulose.
Kuwedzera etherifying agents: Alkaline cellulose inopindirana ne etherifying agents (senge alkyl halides kana alkylene oxides) kuunza mapoka eether muchimiro che cellulose.
Neutralization: Neutralize reaction musanganiswa kumisa kuita uye kuwana inodiwa cellulose ether chigadzirwa.
7. Kuwacha nekuomesa:
Iyo cellulose ether chigadzirwa chinogezwa kubvisa ne-zvigadzirwa uye tsvina. Mushure mekuchenesa, zvinhu zvinoomeswa kuti zviwane hunyoro hunodiwa.
8. Kukuya nekuongorora:
Dry cellulose ethers inogona kuitwa pasi kuti iwane chaiyo particle size. Sieving inoshandiswa kupatsanura zvidimbu zvehukuru hunodiwa.
8. Kudzora kwehutano:
Matanho ekudzora emhando anoitwa kuti ave nechokwadi chekuti cellulose ethers inosangana nemiyero yakatarwa. Izvi zvinosanganisira kuyedzwa kwe viscosity, dhigirii rekutsiva, hunyoro hwemukati uye mamwe ma paramita akakodzera.
9. Kurongedza uye kutumira:
Iyo yekupedzisira cellulose ether chigadzirwa chakaiswa uye chakagoverwa kune akasiyana maindasitiri. Kurongedza kwakakodzera kunovimbisa kuti mhando yechigadzirwa inochengetwa panguva yekuchengetedza uye yekufambisa.
Iyo pulping process ye cellulose ether intanho yakaoma yematanho anosanganisira kusarudzwa kwezvinhu, pulping nzira, bleaching, cellulose shanduko, etherification, kuwacha, kuomesa, kugaya uye kutonga kwemhando. Nhanho imwe neimwe yakakosha pakuona kunaka uye zvivakwa zve cellulose ether inogadzirwa, ichiita kuti ive yakakodzera kune dzakasiyana siyana dzekushandisa. Kufambira mberi kwetekinoroji kunoramba kuchivandudza nekugadzirisa maitiro aya kuti kuwedzere kushanda uye kusimba kwekugadzirwa kwe cellulose ether.
Nguva yekutumira: Jan-15-2024