Ngwaahịa
Ọpụrụiche na mmepụta nke mmanya propargyl, 1,4 butynediol na 3-chloropropyne.
Mmepụta nke 1, 4-butanediol (BDO) site na usoro anhydride maleic
Ụlọ ọrụ Davy Mckee dị na United Kingdom mepụtara usoro esterification na hydrogenation nke maleic anhydride.Ọ nwere usoro atọ: (1) mmeghachi omume n'etiti anhydride maleic na ethanol;② A kwadebere BDO site na hydrolysis nke diethyl maleic acid;③ Nkewa na nnụcha ngwaahịa mmeghachi omume.Enwere ike ịgbanwe oke nke BDO, GBL na THF site n'ịgbanwe ọnọdụ usoro.N'ihi uru ọnụ ahịa nke mmepụta BDO, ọtụtụ ngwaọrụ ọhụrụ ejirila usoro a rụọ n'afọ ndị na-adịbeghị anya, nke bụkwa isi mmalite mmepe nke usoro mmepụta BDO.Mmeghachi omume esterification:
Mmeghachi omume hydrogenation
Ka ọ dị ugbu a, e nwekwara usoro n-butane-maleic anhydride, bụ nke a na-ebute ụzọ site na ikuku gas oxidation nke n-butane na-emepụta anhydride maleic, na mgbe ahụ, anhydride maleic na-esterfied na methanol iji mepụta dimethyl maleate.Ntughari nke anhydride maleic nwere ike iru 100% n'okpuru ihe mkpali kwesịrị ekwesị.N'ikpeazụ, BDO na-emepụta site na hydrogenation na hydrolysis nke maleic anhydride catalyst.Uru nke usoro a bụ na ọ dị mfe ikewapụ ihe ndị na-adịghị ọcha dị ka methanol na mmiri mgbe esterification gasịrị, na ọnụ ahịa nkewa dị ala.Ọzọkwa, mgbanwe nke dimethyl maleate na-abawanye, nke na-eme ka ọrụ dị iche iche nke usoro hydrogenation gas na-abawanye, na ngbanwe nke methanol esterification dị n'elu 99.7%.Ya mere, enweghi nsogbu izizi nke diethyl maleate.Ya mere, ọ dịghị mkpa ịmegharị ihe niile maleic anhydride na mono-methyl ester, ma ọ bụ naanị methanol dị ọcha, nke na-eme ka usoro mmepụta ahụ dị mfe ma na-ebelata ego niile nke ọrụ ahụ ma e jiri ya tụnyere nkà na ụzụ gara aga.
