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铟,首先析出含羟基的盐In_2OHP_3O_(10)·9H_2O,随后转变为InH_3(PO_4)_2·4H_2O. 关键词:三聚磷酸钠; 沉铟; 加压浸出液; sodium tripolyphosphate; indium precipitation; pressure leaching liquor; [全文内容正在添加中] ......
草浆造纸黑液改性制备木质素酚醛树脂结合剂 刘德启1 (1.苏州大学理学院化学化工系 苏州215006) 摘要:以草浆造纸黑液为研究对象,通过对木质素的分离,提纯及对其酚羟基,羟甲基化改性,制备了木质素酚醛树脂结合剂.选择双氧水+稀土为催化剂,确定了其最佳的制备反应条件和试样成型工艺条件.所合成的木质素酚醛树脂结合剂,可以用于A12 O3等材料的常温成型,具有良好的粘度及和易性,提高了制品的热学,力学性能.同时可分别替代酚,醛原料的90%及85%,具有显著的经济与环保效益. 关键词:造纸黑液; 改性木质素酚醛树脂; 结合剂; 耐火材料; Pulp black liquor; Lignin-based phenolic; Binder; Refractories; [全文内容正在添加中] ......
sodium aluminate solutions or Bayer liquor. The methods are: 1) the removal of sulfur by means of wet air oxidation and 2) adding a desulfurizing agent. But by former this method problems... of the former process, the removal of sulfur is capable of separating divalent sulfur ions from the liquor by forming insoluble zinc sulfide and the latter concerns the removal of sulfur from the Bayer......
. Pennsylvabia: The Minerals, Metals and Materials Society, 1998: 97-101. [5] WILLIAMS F S, PERROTTA A J. Adsorbent combinations for enhanced removal of sodium oxalate from Bayer process spent liquor... University, 2008: 58-68. [7] MA Jia-yu, ZHAI Kun-ming, LI Zhi-bao. Desilication of synthetic Bayer liquor with calcium sulfate dehydrate: Kinetics and modeling[J]. Hydrometallurgy, 2011, 107(1/2): 48-55......
硅混凝土素淋摘 要:<正> 苏联科学院地球化学研究所研制成新的硅混凝土材料.它的硬度仅次于黄玉,刚玉,金刚石,不少特性超过铸石件.它的耐热性是铸石件的两倍,且在200℃的热硫酸关键词:......
法国加尔当氧化铝厂D.T.Watt,张永注摘 要:<正> 加尔当(Gardanne)氧化铝厂于1892年投产,当时采用不经济的圣克莱戴维耳/彼施(?)(Sainte-Claire Deville/Pechiney)法进行生产.1896年至1902年拜耳(Bayer)曾在加尔当氧化铝厂工作过,但是在他到达以前,该厂已采用他的方法进行生产了.后来曾进行了某些改关键词:......
-GL is attributed to the existence of alumino-silicate anion. References [1] BARNES M C, ADDAI-MENSAH J, GERSON A R. The kinetics of desilication of synthetic spent Bayer liquor seeded with cancrinite...]. Hydrometallurgy, 1996, 43(1/2/3): 13-35. [3] ZHENG K L, SMART R, ADDAI-MENSAH J, GERSON A. Solubility of sodium aluminosilicates in synthetic Bayer liquor [J]. Journal of Chemical and Engineering Data, 1998......
, 104(2): 216-221. [15] MA Jia-yu, ZHAI Kun-ming, LI Zhi-bao. Desilication of synthetic Bayer liquor with calcium sulfate dihydrate: Kinetics and modelling [J]. Hydrometallurgy, 2011, 107(1-2): 48-55......
First Normal University, Changsha 410205, China) Abstract: A dynamic model was proposed describing the energy transfer in continuous alumina trihydrate precipitation in the Bayer process. The accuracy...: 141-145. [3] 毕诗文, 薛红, 杨毅宏, 等. 拜耳法铝酸钠溶液分解动力学[J]. 中国有色金属学报, 1998, 8(1): 131-134. BI Shiwen, XUE Hong, YANG Yihong, et al. Kinetics of decomposition of Bayer sodium aluminate solution[J]. The Chinese Journal......
of humates, lignin and cellulose [3]. On digestion of this bauxite in the Bayer process, 50%-90% of the organic compounds may be extracted into the Bayer liquor as dissolved organic compounds... of analytical grade. The synthetic goethite (α-FeOOH) was treated by a simulated Bayer digestion as follows: the simulative circulating mother liquor was prepared by NaOH and Al(OH)3, with alkali......