Iyiphi indlela ye-acetylene yokulungiselela i-maleic anhydride ukusuka ku-1,4-butanediol?

Indlela ye-acetylene ye-1,4-Butanediol ukulungiselela i-maleic anhydride.

Kokuthoma, i-acetylene ihlangana ne-formaldehyde phambi kwe-Cu-Bi catalyst ku-98kPa kanye ne-80-95°C ukukhiqiza i-1,4-butynediol. Bese, i-1,4-butynediol yenziwa nge-hydrogen ibe yi-1,4-butenediol ngaphasi kwe-catalysis ye-skeletal nickel ku-1.372-2.06MPa kanye no-50-60°C. Okulandelako, ukuragela phambili kwe-catalytic hydrogenation (13.7-20.6MPa, 120-140°C) kwenziwa nge-Ni-Cu-Mn/Al2O3 ukwakha i-1,4-butanediol. Ngemva kokususa ama-ayoni wensimbi nge-ion exchange resin, i-1,4-butanediol emsulwa itholakala ngokuvundiswa nokuhlanzwa.

Kubayini ukhetha i-Maleic Anhydride? Ngumgogodla we-polyester resin ephezulu, begodu ivula amakhemikhali ahlukahlukeneko (i-BDO, i-THF, njll.). Sithumelele umlayezo nje ukuhlola iinsombululo ze-MA ezilungiselelwe ibhizinisi lakho!