摘要
以NaY分子筛为原料，氯化镧溶液为交换液，制备了LaNaY型分子筛，以此为基础制备出相应的催化裂化催化剂，并借助x射线衍射法和红外光谱法对LaNaY型分子筛的性能进行了表征。结果表明，随着交换浆液pH值的提高，镧离子可与NaY分子筛方钠石笼中的钠离子进行交换，从而定位于其中；交换浆液最佳pH值为3．5—4．5。随着焙烧温度的升高，LaNaY型分子筛结晶度及其保留率均增加，相应的催化剂微反活性也提高。LaNaY型分子筛最佳焙烧温度为450—550℃。
LaNaY zeolite was prepared with NaY zeolite as raw material, lanthanum chloride solution as exchange medium. Based on this LaNaY zeolite, catalytic cracking catalyst was prepared. The per- formance of LaNaY zeolite was characterized by X - ray diffraction and infrared spectroscopy. The results showed that with increasing the pH value of ex- change solution,lanthanum ion could exehange with sodium ion in sodalite eage of NaY zeolite,and loca- ted in the cage. The optimum pH value of exchange solution was 3.5 - 4.5. With the increase of calcina- tion temperature,both the crystallinity and its reten- tion rate increased, and the micro - activity of rele- vant catalyst also increased. The optimal calcination temperature of LaNaY zeolite was 450 -550 ℃.
出处
《石化技术与应用》
CAS
2013年第6期489-492,共4页
Petrochemical Technology & Application
基金
中国石油天然气股份有限公司资助项目(项目编号:PRI R LZ 31.01-2008)
关键词
LaNaY型分子筛
镧
改性
催化剂
结晶度
焙烧温度
微反活性
LaNaY zeolite
lanthanum
modifica- tion
catalyst
crystallinity
calcination temperature
micro - activity
