采用固相交换法对NH4-LSX分子筛进行Li＋交换,详细考察了交换温度和交换时间以及LiCl·H2O与分子筛的摩尔比对其结构与性能的影响,并得到最佳交换条件,由此制备出不同Li＋交换度的锂型低硅铝比X型分子筛（（Li,NH4）-LSX）,采用XRD、FT-IR、SEM、TG和NMR等手段对其进行表征,探讨了不同交换度的（Li,NH4）-LSX分子筛骨架中Li＋的分布数量和结构变化。
The （Li, NH4）-LSX molecular sieves with different Li＋ exchange degree were prepared by substitu ting the NH2 of NH4-LSX via solid-state ion exchange method. The effects of the exchange temperature,ex- change time and the molar ratio of Li＋in LiCl·H2O and NH/ in NH4-LSX on the ion-exchange properties of resultant samples were investigated in details, and therefore the optimum conditions of the Li＋ ion-exchange were obtained. Meantime, XRD, FT-IR, SEM, TG and NMR techniques were employed to characterize their structures, then further exploration were made of Li＋ distribution in the skeleton of the （Li, NHd）-LSX struc- ture with different Li＋ exchange degree.
参考文献
| [1] | Yoshida S;Hirano S;Nakano M .[J].Kagaku Kogaku Ronbunshu,2004,30(04):461-467. |
| [2] | 王啸,马正飞,姚虎卿.沸石中阳离子对氮/氧吸附性能影响的研究进展[J].离子交换与吸附,2002(06):569-575. |
| [3] | 刘宗防;曾懿;刘海燕 等.[J].离子交换与吸附,2009,25(06):565-576. |
| [4] | Chao C C .Process for separating nitrogen from mixtures thereof with less polar substances[P].USP:4859217,1989. |
| [5] | 刘宗肪;刘海燕;曾懿 等.[J].石油学报(石油加工),2008,24(Suppl):44-46. |
| [6] | 张丽;石迎亮;任博.[J].离子交换与吸附 待发表 |
| [7] | 崔邑诚,张爱民,董家騄,须沁华.Li-LSX沸石中阳离子分布与空分性能的研究[J].化学学报,2003(03):350-353. |
| [8] | 郭岱石,马正飞,李娟,姚虎卿.XRD测定NaY型分子筛的钾离子交换度[J].离子交换与吸附,2002(06):516-521. |
| [9] | Toufar H;Toufar S;Philip K M et al.Method of Man- ufactureof Molecular Sieve[P].USP:5916836,1999. |
| [10] | Balse V R;Bluw M .Preparation of ion-exchanged zeo lites[P].USP:5932509,1999. |
| [11] | Douglas W M .Separation of an oxygen nitrogen mixture[P].USP:3140933,1964. |
| [12] | Fitch F R;Bulow M;Ojo A F .Adsorptive separation of nitrogen from other gases[P].USP:5464467,1995. |
| [13] | Toufar H;Toufar S;Philip K M et al.Method of manufacture of molecular sieve[P].USP:5916836,1999. |
| [14] | 杨春.水合NaX沸石与碱金属盐类间的固相离子交换[J].高等学校化学学报,1996(09):1336. |
| [15] | 杨春,须沁华.碱金属离子X型沸石的固相离子交换及其催化性能的研究[J].化学学报,1997(06):562-569. |
| [16] | 孙继红;刘宗防 .一种制备锂型低硅铝X型沸石分子筛的离子交换方法[P].中国专利:200710121786.2,2007. |
| [17] | 张丽;任博;刘瑛.[J].石油学报(石油加工) 待发表 |
| [18] | 徐如人;庞文琴.分子筛与多孔材料化学[M].北京:科学出版社,2004:168-180. |
| [19] | 辛勤.固体催化剂研究方法[M].北京:科学出版社,2004:348. |
| [20] | Feuerstein M;Engelhardt G;MeDaniel P L et al.[J].Microporous and Mesoporous Materials,1998,26:27-35. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%