Alaabta
Ku takhasusay soo saarista khamriga propargyl, 1,4 butynediol iyo 3-chloropropyne
1,4-butanediol (BDO) iyo diyaarintiisa PBAT balaastiig-bidegradable
Hordhac
1, 4-butanediol (BDO);PBAT waa balaastiig heerkul-ku-balaastig ah, kaas oo ah copolymer ee butanediol adipate iyo butanediol terephthalate.Waxay leedahay sifooyinka PBA (polyadipate-1, 4-butanediol ester diol) iyo PBT (polybutanediol terephthalate).Waxay leedahay ductility wanaagsan iyo elongation ee nasashada, iyo sidoo kale iska caabin kulaylka wanaagsan iyo waxqabadka saamaynta.Intaa waxaa dheer, waxay leedahay biodegradability aad u fiican oo waa mid ka mid ah qalabka ugu caansan ee biodegradable ee cilmi-baarista bacaha noolaha iyo codsiga ugu fiican ee suuqa.
Kuwa soo socda waa halabuurka PBAT qaybaha silsiladda polymer:
Wax soo saarka warshadaha ee 1, 4-butanediol ayaa lagu xaqiiqsaday afar hab oo waaweyn.
1. Habka Aldehyde (Habka Reppe): acetylene ugu horeysay iyo formaldehyde joogitaanka Cu-BI kicinta si ay u sameeyaan 1, 4-butynediol.Dambe waxaa lagu sii daayay hydrogenated ilaa 1, 4-butenediol iyada oo loo sii marayo nikkel lafaha, oo ay ku xigto Ni-Cu-Mn/Al2O3 ilaa 1, 4-butanediol.
2. Maleic anhydride hydrogenation: waxa loo sii kala qaybiyaa maleic anhydride esterification hydrogenation iyo maleic anhydride hydrogenation toos ah.
3. Habka Butadiene: laga bilaabo 1, 3-butadiene iyo acetic acid iyo oxygen acetyl oxidation reaction, si loo soo saaro 1, 4-diacetyloxy-2-butadiene, ka dibna hydrogenation, hydrolysis.
4. Habka propylene oxide (hab alkolada alkohol): propylene oxide sida alaabta ceeriin, isomerization catalytic galay khamriga allyl, in organic phosphine ligand kicinta hoos ficil falcelinta hydroformylation si ay u abuuraan alaabta ugu weyn ee γ-hydroxypropanal, ka dibna soo saarista, hydrogenation, sifaynta. si loo helo BDO.
Habka Reppe waa habka dhaqameed ee lagu soo saaro BDO, taas oo ku salaysan acetylene iyo formaldehyde sida alaabta ceeriin, synthesis iyo hydrogenation ee laba tillaabo si ay u dhaliyaan BDO: ① acetylene iyo falcelinta formaldehyde si ay u soo saaraan 1, 4-butynediol iyo propargyl alkohol sida byproduct. ;②1, 4-butanediol waa hydrogenated si uu u sameeyo 1, 4-butanediol.
Diyaarinta Acetylene waxay leedahay [dariiqa gaaska dabiiciga ah / saliidda] iyo [wadada dhuxusha]: isticmaalka kookaha iyo nuuradda foornada heerkulka sare si loo dhaliyo kalsiyum carbide, karbide calcium iyo falcelinta biyaha si loo dhaliyo acetylene;Acetylene waxaa laga soo saaraa gaaska dabiiciga ah ama saliidda qayb ahaan oksaydheynta methane.
