I-Pseudo-boehmite

I-Pseudo-boehmite iyisandulela esihle kakhulu ngesikhathi sokwenziwa kwe-gamma alumina, ngoba kuphela ukususwa kwamanzi nge-calcination cishe ku-447 C okudingekayo. Ukulawulwa kweziguquguquko zokusebenza ngesikhathi sokwenziwa kwe-pseudo-boehmite: ukugcwala okukhulu kwezixazululo kuyisici esibaluleke kakhulu, ngaphezu kwalokho i-pH, izinga lokushisa, ukungcola kanye nohlobo lwama-reagents [3,4]. Qinisekisa ubumsulwa balesi sici futhi lezi ziguquguquko zinquma isimo, ukuthungwa kanye nezakhiwo zaso ze-precipitate. Ngakho-ke, kubalulekile ukulandela izenzakalo ezenzeka ngesikhathi sokwenziwa, ukuze kubikezelwe isivuno kanye nekhwalithi yomkhiqizo wokugcina. Kulo msebenzi, ukwenziwa kwe-pseudo-boehmite kwathuthukiswa ngendlela yemvula, kusetshenziswa isisombululo se-aluminium sulfate supersaturated yezinga lezimboni kanye ne-ammonium hydroxide egxilile (28%) njenge-reactants; le ndlela eyaziwayo yathuthukiswa ukunciphisa izinga lokushisa lokusabela ngaphansi kwephuzu lokubila le-ammonia. Ukulawulwa kwezinga lokushisa kwe-reactant medium kwafinyelelwa ngokutholwa kwedatha kanye nokuphathwa okuzenzakalelayo kwe-heating medium. Kuboniswa ukuthi ukusebenzisa i-reactor atisothermal conditions kuqinisekisa ikhwalithi yokugcina ye-pseudo-boehmite ekhiqizwayo.