[1]潘志爽,王漫云,刘涛,等.RE-Y分子筛离子交换条件对稀土利用率的影响[J].石化技术与应用,2022,3:160-163.
PAN Zhi-shuang,WANG Man-yun,LIU Tao,et al.Effect of ion exchange conditions on rare earth utilization rate ofRE-Y zeolite[J].Petrochemical technology & application,2022,3:160-163.
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RE-Y分子筛离子交换条件对稀土利用率的影响(PDF)
PAN Zhi-shuang,WANG Man-yun,LIU Tao,et al.Effect of ion exchange conditions on rare earth utilization rate ofRE-Y zeolite[J].Petrochemical technology & application,2022,3:160-163.
《石化技术与应用》[ISSN:1009-0046/CN:62-1138/TQ]
- 期数:
- 2022年3期
- 页码:
- 160-163
- 栏目:
- 出版日期:
- 2022-05-10
文章信息/Info
- Title:
- Effect of ion exchange conditions on rare earth utilization rate ofRE-Y zeolite
- 文章编号:
- 1009-0045（2022）03-0160-04
- Author(s):
- PAN Zhi-shuang; WANG Man-yun; LIU Tao; TAN Zheng-guo
- Lanzhou Petrochemical Research Center，Petrochemical Research Institute，PetroChina，Lanzhou 730060，China
- Keywords:
- NaY zeolite; RE-Y zeolite; ion exchange; rare earth; utilization rate
- 分类号:
- TQ 028.3+3；TE 624.9+1
- DOI:
- DOI：10.19909/j.cnki.ISSN1009-0045.2022.02.0082
- 文献标识码:
- B
- 摘要:
- 考察了NaY分子筛稀土离子（RE3+）交换过程的稀土投料量（稀土与分子筛质量比，%）、焙烧温度和铵盐用量（铵盐与分子筛质量比，%）对稀土利用率的影响。结果表明：NaY型分子筛交换过程的稀土饱和交换度、超笼中RE3+的不稳定性，以及NH4+的反交换是造成分子筛交换过程稀土利用率低的主要原因；在稀土改性Y型分子筛（RE-Y）制备过程中，RE3+与NaY分子筛的Na+在100 ℃下的交换为不完全交换；当一交一焙中的稀土投料用量从3%提高至15%时，稀土利用率由95.9%降至84.6%，适当降低稀土投料量有利于提高其利用率；当一交中的铵盐用量为12%时，RE3+完全被NH4+反交换出来，稀土利用率为0 ；当铵盐在一交、二交中用量分别为4%，15%时，稀土利用率分别为57.0%，96.7%，Na2O质量分数分别为4.48%，1.58%，达到Y型分子筛Na2O质量分数相应不大于4.5%，1.7%的指标要求；适当升高焙烧温度有利于提高超笼中的RE3+向小笼的迁移率，增加RE3+的稳定性，当一交一焙中的焙烧温度高于400 ℃时，稀土利用率约为90%。
- Abstract:
- The effects of rare earth feeding mass ratio to molecular sieve， calcination temperature and ammonium salt mass dosage on rare earth utilization rate of NaY zeolite in rare earth ion exchange process were investigated . The results showed that the saturation exchange degree of rare earth in Y zeolite exchange process， the instability of rare earth ions（RE3+） in super cage and the reverse exchange of NH4+ were the main reasons for the low utilization rate of rare earth in the exchange process of NaY zeolite. The exchange between RE3+ and Na+ of NaY was incomplete at 100 ℃ during the preparation of rare earth modified Y molecular sieve （RE-Y）. When the rare earth mass feeding ratio increased from 3% to 15%， the rare earth utilization rate reduced from 95.9% to 84.6%. For this above reason， reducing the rare earth feeding amount appropriately was conducive to improving the rare earth utilization rate. When the amount of ammonium salt in the first exchange was 12%， the RE3+ was completely exchanged by NH4+， and the corresponding rare earth utilization rate was 0. When the amount of ammonium salt in the first and the second ion exchange was 4% and 15% respectively， the corresponding rare earth utilization rate was 57.0% and 96.7%. Meanwhile， the mass fraction of Na2O was 4.48% and 1.58%， which met the index requirement of their relevantly matching the mass fraction of Na2O within Y zeolite was not greater than 4.5% and 1.7% respectively. Increasing the calcination temperature would improve the mobility of RE3+ from the super cage to the small one and the stability of RE3+. When the calcination temperature of the first ion exchange was higher than 400 ℃， the utilization rate of rare earth was about 90%.
参考文献/References
［1］ 兰俊，黎先财，杨沂凤. NaY分子筛对低浓度稀土废水的富集与回收［J］. 南昌大学学报（工科版），2015，37（3）：224-227.［2］ 杨玲，张乐，宋丽娟. 稀土离子浓度对Y型分子筛传质动力学的影响［J］. 石油化工高等学校学报，2017，30（6）：11-15.［3］ 焦念信. 分子筛生产污水中氯化稀土的回收利用［J］. 齐鲁石油化工，1995（2）：114-116.［4］ 徐如人，庞文琴，霍启升，等． 分子筛与多孔 材料化学［M］．北京：科学出版社，2004：421-436.［5］ 杨凌，王娟. 提高Y型分子筛生产过程稀土利用率工艺探讨［J］. 山东化工，2017，46（24）：42-44.［6］ 郑小宗，岳虎秀. 稀土Y型分子筛生产过程影响稀土利用率的研究［J］. 化工管理，2015（2）：167.［7］ 冯宜绥. 浅析降低REY分子筛原材料氯化稀土的单耗［J］. 甘肃科技，2011，27（10）：34-36.［8］ 刁良明，姜山，郑小宗. 提高分子筛交换过程稀土利用率的探讨［J］. 学术纵横，2013（7）：104-105.
备注/Memo
- 备注/Memo:
- 中国石油天然气股份有限公司资助项目（项目编号：19-LH-31-01）
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