Hana ʻia o 1, 4-butanediol (BDO) ma ke ʻano maleic anhydride

I kēia manawa, aia nō nā kaʻina hana n-butane-maleic anhydride, i hoʻopaʻa mua ʻia e ka hoʻoheheʻe ʻana o ke kinoea o ka n-butane e hana ai i ka maleic anhydride, a laila esterfied ka maleic anhydride me ka methanol e hana i ka dimethyl maleate.Hiki ke hoʻololi i ka maleic anhydride i 100% ma lalo o ka catalyst kūpono.ʻO ka hope, hana ʻia ka BDO e ka hydrogenation a me ka hydrolysis o ka maleic anhydride catalyst.ʻO nā mea maikaʻi o kēia kaʻina hana he mea maʻalahi ke hoʻokaʻawale i nā mea haumia e like me ka methanol a me ka wai ma hope o ka esterification, a ʻoi aku ka haʻahaʻa o ke kumukūʻai hoʻokaʻawale.Eia kekahi, ua hoʻonui ʻia ka volatility o ka dimethyl maleate, kahi e hoʻonui ai i ka hana o ka pae hydrogenation pae kinoea, a ʻoi aku ka nui o ka hoʻololi ʻana o ka esterification methanol ma luna o 99.7%.No laila, ʻaʻohe pilikia hoʻomaʻemaʻe mua o diethyl maleate.No laila, ʻaʻole pono e hana hou i ka maleic anhydride a me ka mono-methyl ester, akā he methanol maʻemaʻe wale nō, e hoʻomaʻamaʻa i ke kaʻina hana a hoʻemi nui i ka hoʻopukapuka holoʻokoʻa o ka papahana i hoʻohālikelike ʻia me ka ʻenehana mua.