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本文介绍了广州钛白粉厂试产成功通用级金红石钛白粉的工艺技术特点,对产品质量水平作了评介,并对白度问题作了讨论。 相似文献
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提出的钛液反应水解法,改变了传统的外加晶种存在下具有工业意义的水解过程。该法无须外加晶种,选择了以酒石酸,聚丙烯酰胺为沉淀剂,絮凝剂,在常压下使钛液直接长温水解,液相共沉淀制备金红石型TiO2。还研究了反应条件,分析了产品的特性。 相似文献
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低温条件下以TiCl3溶液为钛源,硝酸盐为氧化剂一步制备了高催化活性的棒状金红石型纳米TiO2.以亚甲基蓝的光催化降解为探针反应, 评价了其光催化活性.运用XRD、TEM、UV-Vis表征技术考察了金红石型纳米TiO2的晶体结构、微晶尺寸, 并对氧化合成机制作了探讨.结果表明, NO 3在水热合成过程中是关键的氧化剂;制备的纳米TiO2为棒状结构,粒径约15 nm,棒长约60 nm;光催化降解反应6 h后亚甲基蓝降解率可达53.66%,其性能远远优越于P-25(41.32%). 相似文献
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采用ZnSO_4、K_2CO_3、H_3PO_4组合金红石化促进剂,对硫酸法漂洗后的偏钛酸进行盐处理,煅烧后可制备性能优良的金红石型钛白。 相似文献
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金红石型包膜钛白在涂料中的应用 总被引:2,自引:0,他引:2
介绍了金红石型包膜钛白的质量及其在不同涂料中的应用。结果证明,使用R-930钛白包膜量40%的产品,取代国产钛白,能显著提高涂料的耐候性和抗粉化性;采用正确的方法,全部或大部分用R─930包膜钛白代替进口金红石型钛白,不会明显影响产品质量,并大幅度降低产品成本。 相似文献
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Rutile titanium dioxide (TiO2) white pigment is prepared by a novel NaOH molten‐salt process. Titanium slag is decomposited by NaOH molten salt to obtain sodium titanate which is then converted into hydrate titanium dioxide (H2TiO3) through acid dissolution and hydrolysis. Finally, TiO2 white pigment is prepared by H2TiO3 doping and calcinations. H2TiO3 prepared by this innovative method is characterized and the influencing factors of doping and calcination of H2TiO3 on pigmentary properties of TiO2 are investigated. H2TiO3 with certain characteristics could be prepared through the controlled hydrolysis step in the NaOH molten‐salt process. Good pigmentary properties of rutile TiO2 white pigment are achieved by doping with suitable amounts of K2O, P2O5, Al2O3, and rutile nuclei, thereby approaching the quality of the commercial TiO2 pigment standards. 相似文献
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用电感耦合等离子体发射光谱(ICP-AES)法测定钛白粉中的二氧化钛,试样用硫酸和硫酸铵加热分解,盐酸溶解盐类。通过与GB1706-2006结果对照,表明,方法的RSD为0.45%。 相似文献
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对金红石型钛白吸油量在后处理各工序的变化趋势进行了跟踪与试验,找出了一些规律,并对影响产品吸油量的关键工序提出了改进途径和措施,指出产品中磷含量对吸油量的影响,总结出变化规律。 相似文献
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纳米二氧化钛粉体的制备及光催化活性的研究 总被引:6,自引:0,他引:6
采用改变溶液酸碱度来控制TiCl4水解速度的方法,制备了二氧化钛纳米微晶光催化剂。以造纸废水的光催化降解为研究体系,测定了经过不同温度煅烧后TiO2粉体的催化能力,发现TiO2粉体于100℃热处理2h,造纸废水COD降低了78.3%;400℃煅烧2h,COD降低了53.7%。研究表明,TiO2表面物理吸附的水和过多的Ti-OH会降低光催化活性,适量的Ti-OH有利于光催化氧化。 相似文献
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Giovanni Palmisano Sedat Yurdakal Vincenzo Augugliaro Vittorio Loddo Leonardo Palmisano 《Advanced Synthesis \u0026amp; Catalysis》2007,349(6):964-970
The photocatalytic oxidation of 4‐methoxybenzyl alcohol to p‐anisaldehyde (PAA) was performed in water with organic‐free suspensions of home‐prepared and commercial titanium dioxide (TiO2) catalysts. The nanostructured TiO2 samples were synthesised by boiling aqueous solutions of titanium tetrachloride (TiCl4), under mild conditions, for different times. The crystallinity increased with the boiling time. The 4‐methoxybenzyl alcohol oxidation rate followed the same pattern but the highest yield (41.5 % mol) to PAA was found for the least crystalline sample, that showed a quantum efficiency of 0.116 %. A comparison with two commercial TiO2 samples showed that all the home‐prepared catalysts exhibited a PAA yield higher than that of commercial ones. The only by‐products present were traces of 4‐methoxybenzoic acid and aliphatic products, carbon dioxide being the other main oxidation product. 相似文献
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