Kayayyaki
Kwarewa a cikin samar da barasa na propargyl, 1,4 butynediol da 3-chloropropyne.
1,4-butanediol (BDO) da kuma shirye-shiryenta na PBAT filastik filastik
Gabatarwa
1, 4-butanediol (BDO);PBAT wani roba ne na thermoplastic biodegradable, wanda shine copolymer na butanediol adipate da butanediol terephthalate.Yana da halaye na PBA (polyadipate-1, 4-butanediol ester diol) da PBT (polybutanediol terephthalate).Yana da kyau ductility da elongation a hutu, kazalika da kyau zafi juriya da tasiri yi.Bugu da ƙari, yana da kyakkyawan yanayin halitta kuma yana ɗaya daga cikin abubuwan da aka fi sani da kwayoyin halitta a cikin bincike na robobi da kuma mafi kyawun aikace-aikace a kasuwa.
Abin da ke biyowa shine abun da ke tattare da sassan sarkar polymer PBAT:
Samar da masana'antu na 1, 4-butanediol an gano shi a cikin manyan matakai guda hudu.
1. Hanyar Aldehyde (Hanya Reppe): na farko acetylene da formaldehyde a gaban Cu-BI mai kara kuzari don yin 1, 4-butynediol.An ƙara hydrogenated zuwa 1, 4-butenediol ta hanyar kwarangwal nickel, sannan Ni-Cu-Mn/Al2O3 zuwa 1, 4-butanediol.
2. Maleic anhydride hydrogenation: an ƙara raba shi zuwa maleic anhydride esterification hydrogenation da maleic anhydride kai tsaye hydrogenation.
3. Hanyar Butadiene: daga 1, 3-butadiene da acetic acid da oxygen acetyl oxidation reaction, don samar da 1, 4-diacetyloxy-2-butadiene, sa'an nan kuma hydrogenation, hydrolysis.
4. propylene oxide Hanyar (hanyar allyl barasa): propylene oxide a matsayin albarkatun kasa, catalytic isomerization a cikin allyl barasa, a cikin kwayoyin phosphine ligand mai kara kuzari a karkashin aikin hydroformylation dauki don samar da babban samfurin γ-hydroxypropanal, sa'an nan kuma hakar, hydrogenation, refining. don samun BDO.
Hanyar Reppe ita ce hanyar gargajiya don samar da BDO, wanda ya dogara ne akan acetylene da formaldehyde a matsayin kayan albarkatun kasa, haɓakawa da hydrogenation na matakai biyu don samar da BDO: ① acetylene da formaldehyde dauki don samar da 1, 4-butynediol da propargyl barasa a matsayin byproduct. ;②1, 4-butanediol shine hydrogenated don samar da 1, 4-butanediol.
Shirye-shiryen acetylene yana da [hanyar iskar gas / man fetur] da kuma [hanyar kwal]: yin amfani da coke da limestone a cikin tanderun zafin jiki mai zafi don samar da calcium carbide, calcium carbide da amsawar ruwa don samar da acetylene;Ana samar da acetylene daga iskar gas ko mai ta wani ɓangaren iskar oxygen da methane.
