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STABILIZATION OF SOLUTION ACCORDING TO BAYER'S PROCESS
STABILIZATION OF SOLUTION ACCORDING TO BAYER'S PROCESS
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机译:根据拜耳的流程稳定解决方案
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摘要
PROBLEM TO BE SOLVED: To recover aluminum values in the maximal yield by adding an oxalic acid stabilizer solution to a solution according to the Bayer's process after separating red mud and suppressing the precipitation of sodium oxalate crystals.;SOLUTION: Red mud is separated from a solution according to the Bayer's process obtained by treating a bauxite ore and at least one oxalic acid stabilizer solution in two compounds represented by formulae I and II (R1 is a straight- chain or a side chain, a saturated or an unsaturated hydrocarbon group having ≥5 carbon atoms; R2 and R3 are each selected from a halogen, an alkyl, a cylcoalkyl, a hydroxyalkyl or the like; R4 is a bivalent cross-linking group selected from alkyls, cycloalkylenes, arylenes or the like optionally hetero- interrupted with a heteroatom selected from oxygen, sulfur or nitrogen) in an amount of about 1-50 ppm is added to the solution according to the Bayer's process. Lauryl-N,N-dimethylamine oxide is cited as an example of the oxalic acid stabilizer solution.;COPYRIGHT: (C)2000,JPO
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机译:解决的问题:分离赤泥并抑制草酸钠结晶沉淀后,根据拜耳法在溶液中添加草酸稳定剂溶液,以最大产率回收铝值;解决方案:将赤泥从硅藻土中分离出来。通过在一种式I和II表示的两种化合物中(R1为直链或侧链,饱和或不饱和烃基均≥≥)处理铝土矿矿石和至少一种草酸稳定剂溶液而得的按照拜耳法制备的溶液5个碳原子; R 2和R 3各自选自卤素,烷基,环烷基,羟烷基等; R 4是选自烷基,亚环烷基,亚芳基等的二价交联基团,其任选地被一个或多个杂原子间断。根据拜耳法将约1-50ppm的选自氧,硫或氮的杂原子)加入溶液中。草酸稳定剂溶液的例子有月桂基-N,N-二甲基氧化胺。;版权所有:(C)2000,JPO
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