ʻO ke kaʻina hana pulping o cellulose ethers e pili ana i kekahi mau ʻanuʻu o ka unuhi ʻana i ka cellulose mai ka mea maka a ma hope o ka hoʻololi ʻana iā ia i cellulose ethers.ʻO nā cellulose ethers he mau mea hoʻohui like me nā noi i nā ʻano ʻoihana like ʻole, me nā lāʻau lapaʻau, meaʻai, textiles a me ke kūkulu ʻana.He mea koʻikoʻi ke kaʻina hana pulping no ka loaʻa ʻana o ka cellulose kiʻekiʻe, ka mea maka no ka hana ʻana i nā cellulose ethers.Eia ka wehewehe kikoʻī o ke kaʻina hana pulping cellulose ether:
1. Koho mea maka:
Hoʻomaka ka hana pulping me ke koho ʻana i nā mea maka i loaʻa i ka cellulose.ʻO nā kumu maʻamau ka lāʻau, ka pulupulu, a me nā mea kanu ʻē aʻe.ʻO ke kohoʻana o nā mea maka e pili ana i nā mea e like me ka loaʻaʻana o ka cellulose ether, ke kumukūʻai a me nā waiwai i makemakeʻia.
2. Ka hana ʻana i ka pulp:
Nui nā ʻano o ka pulping cellulose, ʻoi aku ka nui o ka pulping kemikal a me ka pulping mechanical.
3. ʻO ka pulping kemika:
Kraft pulping: Hoʻopili i ka mālama ʻana i nā ʻāpana lāʻau me ka hui ʻana o ka sodium hydroxide a me ka sodium sulfide.Hoʻopau kēia kaʻina i ka lignin, e waiho ana ma hope o ka cellulosic fibers.
Sulfite pulping: Hoʻohana i ka sulfurous acid a i ʻole bisulfite e wāwahi i ka lignin i loko o ka meaʻai.
Organic solvent pulping: Ke hoʻohana nei i nā mea hoʻoheheʻe organik e like me ka ethanol a i ʻole ka methanol e hoʻopau i ka lignin a hoʻokaʻawale i nā fiber cellulose.
4. Mechanical pulping:
ʻO ka pulupulu lāʻau lepo pōhaku: Hoʻopili i ka wili lāʻau ma waena o nā pōhaku e hoʻokaʻawale i nā ʻili.
Refiner Mechanical Pulping: Hoʻohana i ka ikaika mechanical e hoʻokaʻawale i nā fiber ma ka hoʻomaʻemaʻe ʻana i nā ʻāpana lāʻau.
5. Hoʻomaʻemaʻe:
Ma hope o ka pulping, hoʻomaʻamaʻa ka cellulose i kahi kaʻina bleaching e wehe i nā haumia a me ke kala.Hiki ke hoʻohana ʻia ka chlorine, chlorine dioxide, hydrogen peroxide a i ʻole oxygen i ka wā o ka bleaching.
5.. Hoʻololi Cellulose:
Ma hope o ka hoʻomaʻemaʻe ʻana, hoʻololi ʻia ka cellulose e hana i nā ether cellulose.ʻO nā ʻano hana maʻamau e pili ana i ka etherification, esterification a me nā hopena kemika ʻē aʻe e hoʻololi i ke kino a me nā waiwai kemika o cellulose.
6. Etherification kaʻina hana:
Alkalization: Ka mālama ʻana i ka cellulose me kahi alkali (maʻamau ka sodium hydroxide) e hana i ka cellulose alkali.
Hoʻohui i nā mea hoʻoheheʻe: Hoʻopili ʻo Alkaline cellulose me nā mea etherifying agents (e like me nā alkyl halides a i ʻole alkylene oxides) e hoʻokomo i nā pūʻulu etera i loko o ka hale cellulose.
Neutralization: Hoʻopau i ka hui ʻana e hoʻopau i ka hopena a loaʻa ka huahana cellulose ether i makemake ʻia.
7. Holoi a maloʻo:
Holoi ʻia ka huahana cellulose ether e wehe i nā huahana a me nā haumia.Ma hope o ka hoʻomaʻemaʻe ʻana, hoʻomaloʻo ʻia ka mea e loaʻa ai ka maʻamau i makemake ʻia.
8. Ka wili ʻana a me ka nānā ʻana:
Hiki ke hoʻomaloʻo ʻia nā etera cellulose maloʻo no ka loaʻa ʻana o nā ʻāpana kikoʻī.Hoʻohana ʻia ke kānana e hoʻokaʻawale i nā ʻāpana o ka nui i makemake ʻia.
8. Mana maikaʻi:
Hoʻokō ʻia nā hana hoʻomalu maikaʻi e hōʻoia i ka hoʻokō ʻana o cellulose ethers i nā kūlana i kuhikuhi ʻia.Hoʻopili kēia i ka hoʻāʻo ʻana i ka viscosity, degere o ka hoʻololi ʻana, ka ʻoluʻolu a me nā ʻāpana kūpono ʻē aʻe.
9. Packaging a me ka lawe ʻana:
Hoʻopili ʻia ka huahana cellulose ether hope loa a hāʻawi ʻia i nā ʻoihana like ʻole.ʻO ka ʻeke kūpono e hōʻoia i ka mālama ʻana i ka maikaʻi o ka huahana i ka wā o ka mālama ʻana a me ka lawe ʻana.
ʻO ke kaʻina hana pulping o cellulose ether he ʻano paʻakikī o nā ʻanuʻu e pili ana i ke koho ʻana i nā mea maka, ke ʻano pulping, bleaching, cellulose modification, etherification, holoi, maloʻo, wili a me ka mana maikaʻi.He mea koʻikoʻi kēlā me kēia ʻanuʻu i ka hoʻoholo ʻana i ka maikaʻi a me nā waiwai o ka cellulose ether i hana ʻia, e kūpono ai no nā ʻano noi.Ke hoʻomau nei ka holomua o ka ʻenehana i ka hoʻomaikaʻi ʻana i kēia mau kaʻina hana e hoʻonui i ka pono a me ka hoʻomau o ka hana cellulose ether.
Ka manawa hoʻouna: Jan-15-2024