Cerium(IV) hydroxide, also known as ceric hydroxide, is an inorganic compound with the chemical formula Ce(OH)4. It is a yellowish powder that is insoluble in water but soluble in concentrated acids.
Production Cerium(IV) hydroxide can be produced by reacting cerium(III) carbonate and acetic acid, then oxidizing it with hydrogen peroxide in base. The reactions are:钟学明,邓安民,舒红英 等. 氢氧化铈合成的新方法. 过程工程学报. 2005.2. 5(1):74-77 Ce2(CO3)3 + 6 CH3COOH → 2 Ce(CH3COO)3 + 3 CO2↑ + 3 H2O 2 Ce(CH3COO)3 + 3 H2O2 + 4 H2O → 2 Ce(OH)3(OOH) + 6 CH3COOH CH3COOH + NaOH → CH3COONa + H2O 2 Ce(OH)3(OOH) → 2 Ce(OH)4↓ + O2↑ The net equation is： Ce2(CO3)3 + 6 CH3COOH + 3 H2O2 + 6 NaOH —343 K→ 2 Ce(OH)4 + 6 CH3COONa + O2↑ + 3 CO2↑ + 5 H2O If using cerium(III) nitrate as ingredient, a similar reaction occurs:李月红，李树胜，方中心. 高纯氢氧化铈生产工艺研究. 无机盐工业. 2011.9. 43(9): 40-42 2 Ce(NO3)3 + 3 H2O2 + 6 NH3·H2O → 2 Ce(OH)3(OOH)↓ + 6 NH4NO3 + 2 H2O 2 Ce(OH)3(OOH) —Δ→ 2 Ce(OH)4↓ + O2↑ It might also prepared by addition of sodium hydroxide or ammonium hydroxide to a Ce4+ solution, being obtained as a gelatinous precipitate described as CeO2·xH2O, (x = 0.5–2). Boiling an insoluble Ce4+ salt in NaOH gives granular Ce(OH)4.
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