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Recycling of SiO2 and Al2O3 from wasted RFCC catalyst by mechnochemistry
Recycling of SiO2 and Al2O3 from wasted RFCC catalyst by mechnochemistry
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机译：机械化学法从废旧RFCC催化剂中回收SiO2和Al2O3
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摘要
PURPOSE: A method for collecting valuable resources from resid fluidized catalytic cracking(RFCC) catalyst based on a mechano-chemistry technique is provided to collect silicon dioxide, aluminum oxide, and lanthanum oxide. CONSTITUTION: Waste RFCC catalysts generated from a heavy oil upgrading process are dried in a rotary furnace. Air or oxygen is introduced into the rotary furnace and is heated to a temperature between 550 and 1,200 degrees Celsius to oxidize nickel and vanadium and to combust carbon to be eliminated. The plasticized waste RFCC is pulverized or mixing-pulverized using a leachate reagent to obtain powder. The powder is leached using acid or alkali. The resultant product is filtered/dried to obtain silicon dioxide and aluminum oxide. Settled sludge is separated to obtain lanthanum oxide.
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