Pseudo-boehmite

ʻO Pseudo-boehmite ka mea mua maikaʻi loa i ka wā o ka synthesis o ka gamma alumina, no ka mea, ʻo ka wehe wale ʻana o ka wai ma o ka calcination ma kahi o 447 C ka mea e pono ai. ʻO ka kaohi ʻana i nā loli hana i ka wā o ka synthesis o ka pseudo-boehmite: ʻo ka supersaturation o nā hopena he mea nui loa ia, a me ka pH, ka mahana, nā haumia a me ke ʻano o nā reagents [3,4]. E hōʻoia i ka maʻemaʻe o kēia mea a me kēia mau loli e hoʻoholo i ke ʻano, ke ʻano a me kona mau ʻano o ka precipitate. No laila, he mea kūpono ia e hahai i nā hanana e kū mai ana i ka wā o ka synthesis, i mea e wānana ai i ka hua a me ka maikaʻi o ka huahana hope loa. Ma kēia hana, ua hoʻomohala ʻia ka synthesis o ka pseudo-boehmite e ke ʻano o ka precipitation, me ka hoʻohana ʻana i ka alumini sulfate supersaturated solution ʻoihana a me ka ammonium hydroxide i hoʻopaʻa ʻia (28%) ma ke ʻano he reactants; ua hoʻomaikaʻi ʻia kēia ʻano hana i ʻike ʻia e hoʻemi ana i ka mahana o ka hopena ma lalo o ke kiko paila o ka ammonia. Ua hiki ke kaohi ʻana i ka mahana o ka medium reactant ma o ka loaʻa ʻana o ka ʻikepili a me ka hoʻoponopono ʻakomi o ka medium hoʻomehana. Ua hōʻike ʻia ʻo ka hana ʻana i ka reactor ma nā kūlana isothermal e hōʻoia i ka maikaʻi hope loa o ka pseudo-boehmite i hana ʻia.