1) silicon dioxide containing sodium aluminate solution
硅铝酸钠溶液
1.
Sodium aluminate and silicon dioxide containing sodium aluminate solutions have been investigated by Raman scattering, Infrared adsorption spectra, surfacer tension, viscosity and Tyndally.
本文通过对铝酸钠和硅铝酸钠溶液的红外光谱、拉曼光谱、粘度、表面张力、丁达尔现象和聚沉等光谱和物理化学性质的研究测定,分-析了硅在铝酸钠溶液中的行为。
2.
In desilication process,the silicon dioxide containing sodium aluminate solutions has been investigated by surface tension and viscosity.
通过对脱硅过程中含硅铝酸钠溶液表面张力和黏度的测定,研究脱硅温度、氧化铝浓度、苛性比等因素对溶液的表面张力和黏度的影响。
3) sodium aluminate solution
铝酸钠溶液
1.
Influence factors of agglomerative efficiency on sodium aluminate solution by ion membrane electrolysis;
铝酸钠溶液离子膜电解附聚过程的影响因素
2.
Effect of silicon dioxide on the precipitation rate and particle size distribution of seeded precipitation proceeding in sodium aluminate solution;
硅对铝酸钠溶液分解过程分解率和粒度分布的影响
3.
Production of A1(OH)_3 by ion membrane electrolysis in sodium aluminate solution;
铝酸钠溶液离子膜电解方法制备氢氧化铝
4) Aluminate solution
铝酸钠溶液
1.
Thermodynamics of carbonization of aluminate solution;
铝酸钠溶液碳酸化分解的热力学
2.
Reaction behavior between calcium oxide or calcium hydroxide and aluminate solution with heavy caustic soda;
氧化钙或氢氧化钙与浓碱铝酸钠溶液的反应特性
3.
The aluminate solution from ahmina refiriery was desilicated with the ddition of calciumhydroalumocarbonate getting high silica index μ_(Si)(5000~10 000). This solution was carbon-ated in two steps and special Al(OH)_3 with size below 1.0μm and pourity over 99.9%wasprepared.The optimum conditfions in wliich this Al(OH)_3 is prepared have been deter-mined.
用二氧化碳气体两段碳酸化经深度脱硅,硅量指数μ_(Si)为5000~10000的工业铝酸钠溶液,制得粒度为1。
5) sodium aluminate solutions
铝酸钠溶液
1.
Effects of dicarboxylic acids and silicon dioxide on the seeded precipitation of sodium aluminate solutions;
二元酸杂质及硅对铝酸钠溶液种分过程的影响
2.
Nanofibrous γ-Al 2O 3 with very large pore volume was successfully prepared by precipitation from H 2O 2 and sodium aluminate solutions combined with dispersing and washing the precipitate with ethanol.
采用H2 O2 沉淀铝酸钠溶液和乙醇分散并洗涤沉淀相结合的方式成功地制备出了大孔容纳米γ Al2 O3 纤维 。
3.
By several kinds of advanced techniques and DFT Quantum Chemical calcultions, the mechanism of the precipitation process under ultrasound in sodium aluminate solutions have been researched for the first time.
本研究工作应用有关现代分析手段和量子化学理论计算,首次系统地研究了超声强化铝酸钠溶液分解的机理。
6) sodium aluminate
铝酸钠溶液
1.
Effect of silicon-containing impurity on precipitation of sodium aluminate solution and interaction mechanism;
含硅杂质对铝酸钠溶液分解过程的影响及相互作用机理
2.
Effect of oleic acid on process of precipitation of sodium aluminate solution and interaction mechanism of oleic acid on surface of production Al(OH)_3;
油酸对铝酸钠溶液分解过程的影响及在产物表面的相互作用行为
3.
The given method of desulphurization of sodium aluminate is CaO-additive.
铝酸钠溶液添加石灰脱硫的实质是Ca(OH) 2 在铝酸钠溶液中与Na2 SO4相互作用生成 3CaO·CaSO4·12H2 O随赤泥排
补充资料:铝酸钠溶液脱硅
铝酸钠溶液脱硅
desilication of sodium aluminate liquor
旧suanna rongye tuogui铝酸钠溶液脱硅(desilieation of sodium alu-minate liquor)从铝酸钠溶液中清除氧化硅的过程。是烧结法或化铝生产过程为确保产品质量所设的专门作业。在铝酸盐熟料溶出液中,一般含A120:约1209/L,含5102高达4.5~6.09/L,AI:O。与510:的质量比约20~30。称A12O3/510:为脱硅程度,用A/S表示。这种510:过饱和度很高的溶出粗液在铝酸钠溶液破酸化分解时,会有大量510:随氢氧化铝一起析出,导致产品质量不合要求。因此,在铝酸钠溶液碳酸化分解之前,粗溶出液须经专门脱硅处理,以制成精液。脱硅程度越深,铝酸钠溶液碳酸化的分解率和产量也越高。 在20世纪60年代以前,烧结法生产氧化铝厂多采用在423一443K的压煮器中进行一段脱硅的方法,精液脱硅程度A/S可达400。60年代以后,在一段脱硅的基础上,改进用在常压下加石灰进行二段脱硅的方法,精液脱硅程度A/S达到1000~1500。在80年代,对超深度脱硅的试验研究取得了突破性进展,精液脱硅程度A/S可达500。以上。 原理铝酸钠溶液脱硅的实质是使溶液中5102转变为溶解度很小的化合物析出。有两种可以使510:生成难溶化合物析出的方法。一种是使510:转变成为方钠石析出,另一种是加石灰使510:成为水化石榴石析出。这两种化合物在铝酸钠溶液中各有不同的平衡溶解度。 510:在铝酸钠溶液中与Na:0、A几03的平衡浓度有如下关系:S平=(2,6一2.7)x 10一5 x NaZoxA12O3(g/L)。当溶液温度为373~453K时,温度对510:平衡浓度的影响很小,但对S心:呈介稳状态的铝酸钠溶液的脱硅动力学影响很大。在373一453K温度范围内,提高温度,可加速脱硅反应: 1 .7Na:5103+ZNaAI(OH);一NaZO·A12Os·1.75102·H:O+3.4NaOH+1.3H:O脱硅反应产物为方钠石型水合铝硅酸钠。加入活性水合铝硅酸钠晶种,也可促进方钠石的析出;在提高搏液温度、加入晶种和搅拌等条件下,可使大部分硅从溶液中析出,510:的浓度可由4~6g/L降低到。.豁~o·309/L。 向铝酸钠溶液中加石灰按反应:3Ca(OH)2+ZNaAI(OH)‘+nNaZSIO3— 3CaO·A12O3·nsiOZ·(6一Zn)H:O+2(l+n) NaOH+nHZO析出水化石榴石固溶体。平衡溶解度比方钠石小得多。溶液加石灰处理能使510:浓度降低到0.02~0.059/L。称水化石榴石3CaO·A120:.nsiO:.(6一Zn)HZO中的,值为510:的饱和度,在溶液常压沸点的条件下,n=0.1~0.2。
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