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    • 84. 发明公开
    • 금속 산화물의 도핑 방법
    • 金属氧化物在亚临界或超临界条件下的掺杂方法
    • KR1020040100136A
    • 2004-12-02
    • KR1020030032357
    • 2003-05-21
    • 한화케미칼 주식회사
    • 송규호명완재백진수박세웅정창모
    • C01G1/02B82Y40/00
    • C01G25/02A61K8/044A61K2800/413A61Q17/04B82Y5/00B82Y30/00C01B13/0262C01B13/366C01B2210/0046C01F17/0043C01G1/02C01G9/00C01G9/02C01G25/00C01P2002/50C01P2002/60C01P2002/84C01P2004/64C01P2006/12C01P2006/13C01P2006/40Y02P20/544
    • PURPOSE: Provided is a preparation method of nano-sized metal oxide particles doped with metal oxide without sintering by reacting deionized water and two or more of metal salt solution continuously in a short time under subcritical or supercritical condition. CONSTITUTION: Nano-sized metal oxide particles doped with metal oxide, ZnO-doped CeO2 particles, are prepared by the following steps of: (i) applying heat and pressure to deionized water in advance; (ii) reacting heated and pressured water with at least two metal salt solution in a reactor under temperature of 200-700deg.C and pressure of 180-550bar, subcritical or supercritical condition, wherein two or more metal salt solution, such as cerium nitrate and zinc nitrate, are selected from chloride, bromide, nitrate, sulfate, carbonate and organic acid salt of two or more metals selected from Li, Mg, Ca, Sr, Ba, Y, Nb, La, Ti, Zr, Cr, Mo, W, Mn, Fe, Ru, etc., and each metal salt solution contains 0.01-30wt.% of metal salt; (iii) cooling the prepared slurry, separating metal oxide particles and drying. In the step (ii), 0.1-20M(based on the concentration of metal salts) of alkali(or acid) solution, or 0.1-20M(based on the concentration of metal salts) of reductant or oxidant is optionally added to improve doping efficiency of metal oxide. The resultant doped-metal oxide particles have a size of 1-1000nm.
    • 目的:提供掺杂金属氧化物的纳米尺寸金属氧化物颗粒的制备方法,无需烧结,在亚临界或超临界条件下,在短时间内连续将去离子水与两种或多种金属盐溶液反应。 构成:通过以下步骤制备掺杂有金属氧化物的纳米尺寸金属氧化物颗粒,ZnO掺杂的CeO 2颗粒:(i)提前向去离子水施加热和压力; (ii)在200-700℃的温度和180-550bar的压力为亚临界或超临界状态的反应器中将加热和加压的水与至少两种金属盐溶液反应,其中两种或更多种金属盐溶液,例如硝酸铈 和硝酸锌选自Li,Mg,Ca,Sr,Ba,Y,Nb,La,Ti,Zr,Cr,Mo中的两种或更多种金属的氯化物,溴化物,硝酸盐,硫酸盐,碳酸盐和有机酸盐 ,W,Mn,Fe,Ru等,各金属盐溶液含有0.01-30重量%的金属盐; (iii)冷却制备的浆料,分离金属氧化物颗粒并干燥。 在步骤(ii)中,任选地加入0.1-20M(基于金属盐的浓度)的碱(或酸)溶液或0.1-20M(基于金属盐的浓度)的还原剂或氧化剂,以改善掺杂 金属氧化物的效率。 所得掺杂金属氧化物颗粒的尺寸为1-1000nm。
    • 88. 发明公开
    • 침강 알루미나 및 제조방법
    • 沉淀氧化铝及其制造方法
    • KR1020170039721A
    • 2017-04-11
    • KR1020177006102
    • 2015-08-05
    • 사솔 퍼포먼스 케미컬스 게엠베하
    • 라바이올리,마리아,로베르타
    • C01F7/14
    • C01F7/34C01F7/141C01P2002/52C01P2002/60C01P2002/72C01P2006/10C01P2006/12C01P2006/13C01P2006/14C01P2006/16C01P2006/60C01P2006/80
    • 본발명은시딩시기(seeding phase) 및침전시기(precipitation phase)를갖는알루미나를제조하는방법에관한것이다. 시딩시기동안에, 시드혼합물(seed mixture)은, 수용액에알루미늄염을첨가하고이후에일반적으로중성 pH에서시드혼합물을유지시키면서혼합물에알칼리금속알루미네이트를첨가함으로써형성된다. 침전시기는 pH를 6.9 내지 7.8로유지시키면서시드혼합물에알루미늄염 및알칼리금속알루미네이트를동시에첨가함으로써침강알루미나를형성시킨다. 회수된침강알루미나는하기특징들중 적어도하나의, 바람직하게모두를갖는다: i) (XRD를이용하여) (120) 대각면에서 33 내지 42 옹스트롱의결정립크기; ii) 6.30 내지 6.59 옹스트롱의결정립 d-간격(020); iii) 115 내지 166 옹스트롱의평균기공직경을갖는높은다공률; iv) 250 내지 350 ㎏/㎥의상대적으로낮은벌크밀도; v) 60 내지 80 ㎡/g의, 1100℃에서 24시간동안하소후 표면적; 및 vi) 0.8 내지 1.1 ㎥/g의, 1000℃에서 1시간동안하소후 기공용적.
    • 本发明涉及一种生产具有引晶相和沉淀相的氧化铝的方法。 在播种时,种子混合物(种子混合物)通过将铝盐水溶液中,同时通常在加入碱金属铝酸盐的混合物的后保持在中性pH下晶种的混合物而形成。 通过同时向种子混合物中加入铝盐和碱金属铝酸盐,同时保持pH在6.9至7.8,沉淀时间形成沉淀的氧化铝。 回收的沉淀氧化铝优选具有以下特性中的至少一种:i)(使用XRD)(120)对角线33至42埃的粒度; ii)6.30至6.59埃晶粒d间距(020); iii)平均孔径为115-166埃的高孔隙度; iv)体积密度低至250-350kg / m3; v)在1100℃煅烧24小时之后60至80m 2 / g的表面积; 并且vi)在1000℃下煅烧1小时后,孔体积为0.8-1.1m 3 / g。