Study Of Technology Of Pseudo-boehmite Using Aging In Lower-alkalinity

Pseudoboehmite act as chemical alumina because of its compose dubiously and rime faultiness and its controllable capability, It was used widely in the field of petrochemical engineering,fine ceramics,refractory matter and micro-electronics。Thus pseudoboehmite have many uses. However, Due to its complex structure of pseudoboehmite has increased the difficulty of washing, Washing more times, Consume large amount of water, Na2O content of products often more than 0.3% of the requests(mass fraction). Instability of the product quality and high cost has also affected the scope of its application to expand and improve the production scale. According to dispersion characteristics of pseudoboehmite in alkaline aqueous solution. The aging process by adopting a low alkalinity into the washing process to reduce the content of Na2O.The process of test and industry test for produce pseudoboehmite by aging in lower-alkalinity discussed in this article, Sodium aluminate solution take place carbonization reaction in the low temperature and in low concentration,separate fastly,allocate the alkalinity, then aging by heated. Make the gelatin translate into pseudoboehmite. Filtrating and washing after times, scour off the Na2O. Then after drying and crushing produce activator supply the consumers.During the experiment, emphases on studying on the aging temperature, aging alkalinity and carbon liquid separation time. Make certain the aging temperature,aging alkalinity and time of separation carbon liquid by the result of test, supply elaborate data for industrial production.