ʻElua ʻano mea maka no ka hana ʻana o ka alumina i hoʻāla ʻia, ʻo kekahi ka "pauka wikiwiki" i hana ʻia e ka trialumina a i ʻole ka pōhaku Bayer, a ʻo kekahi i hana ʻia e ka aluminate a i ʻole ka paʻakai alumini a i ʻole nā mea ʻelua i ka manawa like.
X,ρ-alumina a me ka hana ana o X,ρ-alumina
ʻO X, ʻo ρ-alumina ka mea maka nui no ka hana ʻana i nā pōpō alumina i hoʻāla ʻia, a i ʻole FCA no ka pōkole. Ma Kina, ua kapa ʻia ʻo ia he "pauka hoʻokuʻu wikiwiki" ma muli o ka pauka alumina i hana ʻia e ke ʻano dehydration wikiwiki. "ʻO ka depowder wikiwiki" he hui ʻana o X-alumina a me p-alumina me nā ʻano like ʻole ma muli o nā kūlana hana like ʻole.
Ua ʻike ʻia ʻo X,ρ-alumina i ka makahiki 1950 a ua hōʻoia ʻia e ASTM i ka makahiki 1960. I nā makahiki 1970, ʻo x a me ʻEulopa. ʻO ke kī i ka ʻenehana X, ρ-alumina ka hoʻomaloʻo wikiwiki ʻana, maʻamau i loko o kahi reactor moe wai, kahi e hoʻomalu ʻia ai ka mahana o ka moe e kahi kinoea kuni a wai paha. I ka makahiki 1975-1980, ua hoʻomohala maikaʻi ʻo Tianjin Institute of Chemical Industry i ka ʻenehana hana hoʻoheheʻe wikiwiki me nā ʻano o ka ʻenehana Kina. Ua hoʻohana ia i ka reactor cone, hoʻohui i ka hydroxide alumini maloʻo a kuʻi ʻia, a hana i ka hui ʻana o X-alumina a me ρ-alumina ma ka hoʻomoʻa wikiwiki ʻana i 0.1 ~ 10s i loko o ka umu hoʻomaloʻo wikiwiki.
Ka manawa hoʻouna: ʻApelila-01-2023
