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tala fou

Faʻaputuga vailaʻau fulufulu

Fulufulu (C4H3O-CHO), faʻaigoaina foi o le 2-furaldehyde, sili ona lauiloa o le aiga furan ma le mafuaʻaga o isi tekinolosi taua furans. O se suavai leai se lanu (pupuna tulaga 161.7 ° C; faʻapitoa mamafa 1.1598) faʻatatau i le pogisa i luga o le faʻaalia i le ea. E faʻavaivaia i totonu o le vai i le tulaga o le 8.3 pasene i le 20 ° C ma e matua miscible i le ava malosi ma le ether.

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 O le vaitaimi o le tusa o le 100 tausaga na faʻailogaina le vaitaimi mai le mauaina o fulufale i le fale suʻesuʻe i le muamua faʻapisinisi gaosiga i le 1922. O le sosoʻoina atinae maua ai se sili lelei faʻataʻitaʻiga o le alamanuia faʻaaogaina o faʻatoʻaga residues. Corncobs, oat hulls, cottonseed hulls, araisa araisa, ma bagasse o le sili autu punaoa meafaitino, o le toe faʻafouina tausaga o lea mautinoa ai le faʻaauau sapalai. I le gaosiga o gaioiga, o le tele o mea masani ma faʻavaivaia le sulfuric acid o loʻo fefeteina i lalo o le mamafa i le tele o rotary digesters. O le fulufuga fausia e aveʻesea pea ma ausa, ma faʻapipiʻiina e distillation; le distillate, luga o le faʻapipiʻiina, vavaeʻese i ni faaputuga se lua. O le vaega pito i lalo, e aofia ai susu susu, o loʻo mago i le faʻamamāina o lagona gaogao e maua ai furfural o le maualalo 99 pasene mama.

Furfural o loʻo faʻaaogaina o se filifiliga solvent mo le faʻamamaina o le suauʻu gaʻo ma le rosin, ma ia faʻaleleia atili uiga o le diesel fuel ma catalytic cracker recycle stock. O loʻo faʻafaigaluegaina tele i le gaosiaina o resin-fusia uili faʻamalosi ma mo le faʻamamaina o butadiene manaʻomia mo le gaosiaina o gaosia paʻu. O le gaosia o le nylon manaʻomia hexamethylenediamine, lea furfural o se taua punaoa. Faʻamalologa ma phenol maua ai furfural-phenolic resins mo le tele o faʻaaoga.

A pasia ufiufi o furfural ma hydrogen i luga o se 'apamemea taua i le maualuga o le vevela, ua faʻatupuina le ava malosi furfuryl. O lenei taua taua o loʻo faʻaaogaina i le palasitika alamanuia mo le gaosiaina o uʻamea oona-tetee uʻamea ma lafo-suia foliga. O le tutusa hydrogenation o furfuryl ava malosi i luga o se limasene mafuaʻaga maua tetrahydrofurfuryl 'ava malosi, mai lea mafuaʻaga ester eseese ma dihydropyran.

 I ona tali atu o se aldehyde, fulufulu paʻu foliga malosi i le benzaldehyde. O lea la, o loʻo feagai ma le faʻaaliga a Cannizzaro i le malosi o le vai suavai; e tau le iloa atu i le furoin, C4H3OCO-CHOH-C4H3O, i lalo o le aʻafiaga o le potassium cyanide; ua liua i hydrofuramide, (C4H3O-CH)3N2, e ala i le gaioiga o le amonia. Peitaʻi, e eseʻese lava fulufulu mai le benzaldehyde ile tele o auala, e avea ai le faʻataʻitaʻiga ma faʻataʻitaʻiga. I luga o le faʻaalia i le ea i le potu vevela, furfural ua faʻaleagaina ma faʻapipiʻiina i formic acid ma formylacrylic acid. Furoic acid o se paʻepaʻe crystalline mautu aoga o se siama ma vailaʻau faʻasao. O ona ester o suavai manogi faʻaaogaina e fai ma mea e faʻaoga i mea manogi ma mea manogi.


Taimi Post: Aukuso-15-2020