Iimveliso
Ubungcali kwimveliso yotywala bepropargyl, 1,4 butynediol kunye ne-3-chloropropyne
I-1,4-butanediol (BDO) kunye nokulungiswa kwayo kwePBAT yeplastiki ye-biodegradable
Intshayelelo
1, 4-butanediol (BDO);I-PBAT yiplastiki ye-thermoplastic biodegradable, eyi-copolymer ye-butanediol adipate kunye ne-butanediol terephthalate.Ineempawu ze-PBA (i-polyadipate-1, i-4-butanediol ester diol) kunye ne-PBT (i-polybutanediol terephthalate).Ine-ductility elungileyo kunye nobude ngexesha lekhefu, kunye nokumelana nobushushu obulungileyo kunye nokusebenza kwempembelelo.Ukongeza, inokonakala okugqwesileyo kwebhayoloji kwaye yenye yezona zinto zidumileyo ezinokubola kuphando lweeplastiki ezinokuguquguquka kunye neyona ndlela isebenzayo kwimarike.
Oku kulandelayo kukubunjwa kwamacandelo e-PBAT polymer chain:
Imveliso ye-industrial ye-1, i-4-butanediol ifunyenwe kwiinkqubo ezine eziphambili.
1. Indlela ye-Aldehyde (indlela yeReppe) : i-acetylene yokuqala kunye ne-formaldehyde phambi kweCu-BI i-catalyst yokwenza i-1, i-4-butynediol.Le yokugqibela i-hydrogenated ngakumbi kwi-1, i-4-butenediol nge-nickel ye-skeleton, ilandelwa ngu-Ni-Cu-Mn / Al2O3 ukuya kwi-1, i-4-butanediol.
2. I-Maleic anhydride hydrogenation: iphinda yohlulwe ibe yi-maleic anhydride esterification hydrogenation kunye ne-maleic anhydride ngqo hydrogenation.
3. Indlela ye-Butadiene: ukusuka kwi-1, i-3-butadiene kunye ne-acetic acid kunye ne-oxygen acetyl oxidation reaction, ukuvelisa i-1, i-4-diacetyloxy-2-butadiene, kunye ne-hydrogenation, i-hydrolysis.
4. indlela yepropylene oxide (indlela yotywala ye-allyl): ipropylene oxide njengezinto eziluhlaza, i-catalytic isomerization kwi-alylal alcohol, kwi-organic phosphine ligand catalyst phantsi kwesenzo se-hydroformylation reaction ukuvelisa imveliso engundoqo γ-hydroxypropanal, kwaye emva koko ukutsalwa, i-hydrogenation, ukucocwa. ukufumana iBDO.
Indlela ye-Reppe yindlela yemveli yokuvelisa i-BDO, esekwe kwi-acetylene kunye ne-formaldehyde njengemathiriyeli ekrwada, i-synthesis kunye ne-hydrogenation yamanyathelo amabini okuvelisa i-BDO: ① i-acetylene kunye ne-formaldehyde reaction ukuvelisa i-1, i-4-butynediol kunye ne-propargyl alcohol njenge-byproduct ;②1, i-4-butanediol i-hydrogenated ukwenza i-1, i-4-butanediol.
Ukulungiswa kwe-acetylene ine [igesi yendalo / indlela yeoli] kunye [umzila wamalahle] : ukusetyenziswa kwe-coke kunye ne-limestone kwisithando sokushisa okuphezulu ukuvelisa i-calcium carbide, i-calcium carbide kunye nokuphendula kwamanzi ukuvelisa i-acetylene;I-acetylene iveliswa kwigesi yendalo okanye i-oyile nge-oxidation ye-methane.
