Lihlahisoa
E sebetsa ka ho khetheha tlhahisong ea joala ea propargyl, 1,4 butynediol le 3-chloropropyne.
1,4-butanediol (BDO) le tokiso ea eona ea PBAT ea polasetiki e ka senyehang
Selelekela
1, 4-butanediol (BDO);PBAT ke polasetiki ea thermoplastic biodegradable, e leng copolymer ea butanediol adipate le butanediol terephthalate.E na le litšobotsi tsa PBA (polyadipate-1, 4-butanediol ester diol) le PBT (polybutanediol terephthalate).E na le ductility e ntle le elongation nakong ea khefu, hammoho le ho hanyetsa mocheso o motle le ts'ebetso ea ts'ebetso.Ho feta moo, e na le biodegradability e ntle haholo 'me ke e' ngoe ea lisebelisoa tse tsebahalang haholo tse ka senyehang liphuputsong tsa lipolasetiki tse senyehang le ts'ebeliso e ntle ka ho fetisisa 'marakeng.
Se latelang ke sebopeho sa likarolo tsa ketane ea polymer ea PBAT:
Tlhahiso ea indasteri ea 1, 4-butanediol e fumanoe ka mekhoa e mene e meholo.
1. Mokhoa oa Aldehyde (mokhoa oa Reppe) : acetylene ea pele le formaldehyde ka pel'a Cu-BI catalyst ho etsa 1, 4-butynediol.Ea ho qetela e tsoela pele ka hydrogenated ho 1, 4-butenediol ka skeleton nickel, e lateloa ke Ni-Cu-Mn / Al2O3 ho 1, 4-butanediol.
2. Maleic anhydride hydrogenation: e boetse e arotsoe ka maleic anhydride esterification hydrogenation le maleic anhydride direct hydrogenation.
3. Mokhoa oa Butadiene: ho tloha 1, 3-butadiene le acetic acid le oksijene acetyl oxidation reaction, ho hlahisa 1, 4-diacetyloxy-2-butadiene, ebe joale hydrogenation, hydrolysis.
4. mokhoa oa propylene oxide (allyl alcohol method) : propylene oxide e le lintho tse tala, catalytic isomerization ka allyl alcohol, in organic phosphine ligand catalyst tlas'a ketso ea hydroformylation reaction ho hlahisa sehlahisoa se seholo sa γ-hydroxypropanal, ebe ho ntšoa, hydrogenation, ho hloekisa. ho fumana BDO.
Mokhoa oa Reppe ke mokhoa oa setso oa ho hlahisa BDO, e thehiloeng ho acetylene le formaldehyde joalo ka lisebelisoa tse tala, synthesis le hydrogenation ea mehato e 'meli ea ho hlahisa BDO: ① acetylene le formaldehyde reaction ho hlahisa 1, 4-butynediol le propargyl joala joalo ka sehlahisoa. ;②1, 4-butanediol e entsoe ka hydrogenated ho theha 1, 4-butanediol.
Tokisetso ea acetylene e na le [tsela ea tlhaho ea khase / oli] le [tsela ea mashala]: tšebeliso ea coke le lejoe la mokoetla seboping sa mocheso o phahameng ho hlahisa calcium carbide, calcium carbide le karabelo ea metsi ho hlahisa acetylene;Acetylene e hlahisoa ka khase ea tlhaho kapa oli ka karolo ea oxidation ea methane.
